/* ══════════════════════════════════════════════════════════════
   The Quantum Observer — Design System
   White/Light Theme · Ubuntu Font · WCAG 2.2 AA
   ══════════════════════════════════════════════════════════════ */

/* ─── Custom Properties & Theme System ────────────────────────── */
:root, html[data-theme="light"] {
    --color-bg: #FFFFFF;
    --color-surface: #FFFFFF;
    --color-card-bg: #FFFFFF;
    --color-text: #0F172A;
    --color-text-secondary: #475569;
    --color-accent: #0284C7;
    --color-accent-hover: #0369A1;
    --color-border: #E2E8F0;
    --color-mark: #FEF3C7;
    --color-hero-bg: #FFFFFF;

    --font-body: 'Ubuntu', system-ui, -apple-system, sans-serif;
    --font-mono: 'Ubuntu Mono', ui-monospace, monospace;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);

    --max-width: 1380px;
    --content-width: 960px;
    --header-height: 64px;
}

html[data-theme="dark"] {
    --color-bg: #0D0D0D;
    --color-surface: #191919;
    --color-card-bg: #191919;
    --color-text: #F8FAFC;
    --color-text-secondary: #94A3B8;
    --color-accent: #38BDF8;
    --color-accent-hover: #7DD3FC;
    --color-border: #2A2A2A;
    --color-mark: #2A2A2A;
    --color-hero-bg: #191919;
}


/* All Buttons Rounded Design System (Rounded Corners 10px) */
button, .btn, .btn-primary, .btn-secondary, .btn-outline, .btn-fan-primary, .ld-view-all, .hp-ritual-btn, .hp-newsletter-btn, .hp-btn-load-more, .mobile-menu-btn, .pill-theme-btn, .card-theme-btn, .card-btn-home, .card-badge-purple, .card-badge-amber, .academic-nav-list a, .dropdown-toggle {
    border-radius: 10px !important;
}

/* ─── Global Reset / Base ──────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-body);
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.25;
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.625rem; margin-top: 2.5rem; margin-bottom: 0.75rem; }
h3 { font-size: 1.25rem; margin-top: 2rem; margin-bottom: 0.5rem; }

p { margin-bottom: 1.25rem; }

ul, ol { padding-left: 1.5rem; margin-bottom: 1.25rem; }

blockquote {
    border-left: 4px solid var(--color-accent);
    padding: 0.75rem 1.25rem;
    margin: 1.5rem 0;
    background: var(--color-surface);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--color-text-secondary);
}

mark {
    background: var(--color-mark);
    padding: 0.1em 0.2em;
    border-radius: 2px;
}

code {
    font-family: var(--font-mono);
    background: var(--color-surface);
    padding: 0.15em 0.4em;
    border-radius: 4px;
    font-size: 0.9em;
    border: 1px solid var(--color-border);
}

pre {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    overflow-x: auto;
    margin: 1.5rem 0;
    line-height: 1.5;
}

pre code {
    background: none;
    padding: 0;
    border: none;
    font-size: 0.875rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
}

th, td {
    text-align: left;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border);
}

th {
    font-weight: 700;
    background: var(--color-surface);
}

hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: 2rem 0;
}

/* ─── Accessibility ────────────────────────────────────────────── */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ─── Academic Insider Masthead Header ───────────────────────────── */
.academic-masthead {
    background: transparent;
    margin-bottom: 1.25rem;
}

.masthead-top {
    text-align: center;
    padding: 2rem 1.25rem 1.25rem 1.25rem;
}

.masthead-title {
    margin: 0;
    line-height: 1.1;
}

.masthead-logo-link,
.footer-logo-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    width: 100%;
    max-width: 100%;
    transition: opacity 0.25s ease, transform 0.25s ease, filter 0.25s ease;
}

.masthead-logo-link:hover,
.footer-logo-link:hover {
    opacity: 0.96;
    transform: scale(1.012);
}

.masthead-logo {
    height: auto;
    width: 100%;
    max-width: 1200px;
    object-fit: contain;
    margin: 0 auto;
    display: block;
    filter: drop-shadow(0 4px 18px rgba(0, 0, 0, 0.08));
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

html[data-theme="dark"] .masthead-logo,
[data-theme="dark"] .masthead-logo {
    filter: drop-shadow(0 6px 24px rgba(56, 189, 248, 0.22));
}

@media (max-width: 1024px) {
    .masthead-logo {
        max-width: 900px;
    }
}

@media (max-width: 768px) {
    .masthead-logo {
        max-width: 650px;
    }
}

@media (max-width: 480px) {
    .masthead-logo {
        max-width: 100%;
    }
}

.footer-brand-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
}

.footer-logo {
    height: auto;
    width: 100%;
    max-width: 500px;
    object-fit: contain;
    margin: 0 auto;
    display: block;
    filter: drop-shadow(0 3px 14px rgba(0, 0, 0, 0.06));
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

html[data-theme="dark"] .footer-logo,
[data-theme="dark"] .footer-logo {
    filter: drop-shadow(0 4px 16px rgba(56, 189, 248, 0.18));
}

@media (max-width: 768px) {
    .footer-logo {
        max-width: 380px;
    }
}

@media (max-width: 480px) {
    .footer-logo {
        max-width: 280px;
    }
}

.logo-light {
    display: inline-block !important;
}

.logo-dark {
    display: none !important;
}

html[data-theme="dark"] .logo-light,
[data-theme="dark"] .logo-light {
    display: none !important;
}

html[data-theme="dark"] .logo-dark,
[data-theme="dark"] .logo-dark {
    display: inline-block !important;
}

.masthead-subtitle {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    margin-bottom: 0;
}

/* Double-line Issue Strip */
.masthead-issue-strip {
    border-top: 3px double var(--color-border);
    border-bottom: 3px double var(--color-border);
    padding: 0.5rem 0;
    margin-top: 1.25rem;
}

.issue-inner {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Sub-header Nav Strip (Floating Header Card) */
.masthead-nav-strip {
    padding: 0.4rem 1.25rem 0.2rem 1.25rem;
    background: transparent;
    position: relative;
    z-index: 1000;
}

.floating-header-card {
    max-width: 1240px;
    margin: 0 auto;
    background: #FFFFFF;
    border: 1px solid #E2E8F0;
    border-radius: 14px;
    padding: 0.65rem 1.25rem;
    min-height: 58px;
    box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.05), 0 2px 6px -1px rgba(0, 0, 0, 0.03);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.85rem;
    transition: all 0.25s ease;
}

html[data-theme="dark"] .floating-header-card,
[data-theme="dark"] .floating-header-card {
    background: #191919;
    border-color: #2A2A2A;
    box-shadow: 0 4px 24px -2px rgba(0, 0, 0, 0.3);
}

.pill-brand-logo-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    padding: 0.2rem 0.6rem 0.2rem 0.2rem;
    transition: transform 0.2s ease, opacity 0.2s ease;
    flex-shrink: 0;
}

.pill-brand-logo-link:hover {
    transform: scale(1.02);
    opacity: 0.95;
}

.pill-brand-logo {
    height: 34px;
    width: auto;
    max-width: 150px;
    object-fit: contain;
    display: block;
}

.card-author-block {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    padding: 0.2rem 0.5rem 0.2rem 0.2rem;
    border-radius: 10px;
    transition: background 0.2s ease;
}

.card-author-block:hover {
    background: rgba(0, 0, 0, 0.03);
}

html[data-theme="dark"] .card-author-block:hover,
[data-theme="dark"] .card-author-block:hover {
    background: rgba(255, 255, 255, 0.05);
}

.card-avatar {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    object-fit: cover;
    border: 1px solid #E2E8F0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

html[data-theme="dark"] .card-avatar,
[data-theme="dark"] .card-avatar {
    border-color: #475569;
}

.card-author-name {
    font-size: 0.95rem;
    font-weight: 800;
    color: #0F172A;
    letter-spacing: -0.01em;
    white-space: nowrap;
}

html[data-theme="dark"] .card-author-name,
[data-theme="dark"] .card-author-name {
    color: #F8FAFC;
}

.card-btn-home {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.35rem 0.95rem;
    font-size: 0.875rem;
    font-weight: 700;
    color: #059669;
    background: #FFFFFF;
    border: 1.5px solid #10B981;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.card-btn-home:hover,
.card-btn-home.active {
    background: #ECFDF5;
    color: #047857;
    border-color: #059669;
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.15);
}

html[data-theme="dark"] .card-btn-home,
[data-theme="dark"] .card-btn-home {
    color: #34D399;
    background: rgba(16, 185, 129, 0.1);
    border-color: #10B981;
}

html[data-theme="dark"] .card-btn-home:hover,
html[data-theme="dark"] .card-btn-home.active {
    background: rgba(16, 185, 129, 0.2);
    color: #6EE7B7;
}

.card-badge-purple {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.35rem 0.45rem 0.35rem 0.75rem;
    font-size: 0.84375rem;
    font-weight: 700;
    color: #6366F1;
    background: #EEF2FF;
    border: 1px solid #C7D2FE;
    border-radius: 8px;
    text-decoration: none;
    white-space: nowrap;
    transition: all 0.2s ease;
}

.card-badge-purple:hover {
    background: #E0E7FF;
    border-color: #A5B4FC;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.15);
}

html[data-theme="dark"] .card-badge-purple,
[data-theme="dark"] .card-badge-purple {
    color: #A5B4FC;
    background: rgba(99, 102, 241, 0.15);
    border-color: rgba(165, 180, 252, 0.3);
}

html[data-theme="dark"] .card-badge-purple:hover,
[data-theme="dark"] .card-badge-purple:hover {
    background: rgba(99, 102, 241, 0.25);
    color: #C7D2FE;
}

.badge-icon-svg {
    stroke-width: 2.2;
    flex-shrink: 0;
}

.card-tag-purple {
    font-size: 0.6875rem;
    font-weight: 800;
    color: #FFFFFF;
    background: #7C3AED;
    padding: 0.12rem 0.45rem;
    border-radius: 6px;
    letter-spacing: 0.02em;
}

.card-right-group {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    margin-left: auto;
}

.card-org-brand {
    font-size: 0.9rem;
    font-weight: 800;
    color: #059669;
    letter-spacing: -0.01em;
    white-space: nowrap;
}

html[data-theme="dark"] .card-org-brand,
[data-theme="dark"] .card-org-brand {
    color: #34D399;
}

.card-theme-btn {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 1px solid #E2E8F0;
    background: #F8FAFC;
    color: #334155;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    padding: 0;
}

.card-theme-btn:hover {
    background: #E2E8F0;
    color: #0F172A;
    transform: rotate(15deg);
}

html[data-theme="dark"] .card-theme-btn,
[data-theme="dark"] .card-theme-btn {
    background: #0F172A;
    border-color: #334155;
    color: #F1F5F9;
}

html[data-theme="dark"] .card-theme-btn:hover {
    background: #334155;
}em;
    white-space: nowrap;
}

html[data-theme="dark"] .pill-org-text,
[data-theme="dark"] .pill-org-text {
    color: #34D399;
}

.pill-theme-btn {
    padding: 0.4rem 0.85rem !important;
    width: auto !important;
    height: auto !important;
    border-radius: 100px !important;
    border: 1px solid var(--color-border) !important;
    background: var(--color-bg) !important;
    color: var(--color-text) !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    cursor: pointer !important;
    transition: all 0.2s ease !important;
}

.pill-theme-btn:hover {
    background: var(--color-border) !important;
    border-color: var(--color-accent) !important;
}

/* Mobile Hamburger Menu Toggle Button (Rounded Pill Button) */
.mobile-menu-btn {
    display: none;
    align-items: center !important;
    justify-content: center !important;
    padding: 0.4rem 0.85rem !important;
    width: auto !important;
    height: auto !important;
    color: var(--color-text) !important;
    background: var(--color-bg) !important;
    border: 1px solid var(--color-border) !important;
    border-radius: 100px !important;
    cursor: pointer !important;
    transition: all 0.2s ease !important;
    flex-shrink: 0 !important;
}

.mobile-menu-btn:hover {
    border-color: var(--color-accent) !important;
    color: var(--color-accent) !important;
    background: rgba(2, 132, 199, 0.08) !important;
}

.mobile-menu-btn .hamburger-icon {
    transition: transform 0.2s ease;
    margin: 0 auto;
}

.mobile-menu-btn[aria-expanded="true"] .hamburger-icon {
    transform: rotate(90deg);
}

.academic-nav {
    display: flex;
    align-items: center;
    flex: 1 1 auto;
    min-width: 0;
    position: relative;
}

.academic-nav::-webkit-scrollbar {
    display: none;
}

.academic-nav-list {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    list-style: none !important;
    list-style-type: none !important;
    padding: 0 !important;
    margin: 0 !important;
    white-space: nowrap;
}

.academic-nav-list li {
    list-style: none !important;
    list-style-type: none !important;
    margin: 0 !important;
    padding: 0 !important;
    position: relative;
    flex-shrink: 0;
}

/* Separator only visible inside mobile drawer */
li.nav-sep {
    display: none;
}

.academic-nav-list li a,
.dropdown-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-family: var(--font-body);
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--color-text-secondary);
    text-decoration: none;
    padding: 0.3rem 0.45rem;
    border: none;
    background: transparent;
    border-radius: 8px;
    white-space: nowrap;
    cursor: pointer;
    line-height: 1.2;
    transition: color 0.15s ease, background 0.15s ease, transform 0.15s ease;
}

.academic-nav-list li a .nav-icon,
.dropdown-toggle .nav-icon {
    width: 14px;
    height: 14px;
    stroke-width: 2.2;
    transition: transform 0.15s ease;
}

.dropdown-toggle .chevron-icon {
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    opacity: 0.7;
}

.academic-nav-list li a:hover,
.dropdown-toggle:hover,
.nav-dropdown.open .dropdown-toggle,
.nav-dropdown:hover .dropdown-toggle {
    color: var(--color-accent);
    background: rgba(0, 87, 184, 0.08);
}

.nav-dropdown.open .dropdown-toggle .chevron-icon,
.nav-dropdown:hover .dropdown-toggle .chevron-icon {
    transform: rotate(180deg);
    opacity: 1;
}

.academic-nav-list li a.active {
    color: var(--color-accent);
    background: rgba(0, 87, 184, 0.1);
    font-weight: 800;
}

.academic-nav-list li a.card-btn-home {
    padding: 0.28rem 0.75rem !important;
    font-size: 0.8125rem !important;
    font-weight: 700 !important;
    color: #059669 !important;
    background: #FFFFFF !important;
    border: 1.5px solid #10B981 !important;
    border-radius: 8px !important;
    box-shadow: none !important;
}

.academic-nav-list li a.card-btn-home:hover,
.academic-nav-list li a.card-btn-home.active {
    background: #ECFDF5 !important;
    color: #047857 !important;
    border-color: #059669 !important;
    box-shadow: 0 1px 4px rgba(16, 185, 129, 0.15) !important;
}

html[data-theme="dark"] .academic-nav-list li a.card-btn-home,
[data-theme="dark"] .academic-nav-list li a.card-btn-home {
    color: #34D399 !important;
    background: rgba(16, 185, 129, 0.1) !important;
    border-color: #10B981 !important;
}

html[data-theme="dark"] .academic-nav-list li a.card-btn-home:hover,
html[data-theme="dark"] .academic-nav-list li a.card-btn-home.active {
    background: rgba(16, 185, 129, 0.2) !important;
    color: #6EE7B7 !important;
}

.academic-nav-list li a.active .nav-icon {
    stroke: #FFFFFF !important;
}

/* ── Dropdown Panels & Mega Menus ── */
/* ── Dropdown Panels & Mega Menus ── */
.dropdown-panel {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    min-width: 340px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: 0 16px 36px -8px rgba(0, 0, 0, 0.16), 0 0 0 1px rgba(0, 0, 0, 0.05);
    padding: 1.15rem;
    display: none;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.18s cubic-bezier(0.16, 1, 0.3, 1), transform 0.18s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.18s;
    transform: translateY(-6px);
    z-index: 9999;
}

/* Hover Bridge prevents losing hover state when moving mouse down */
.dropdown-panel::before {
    content: '';
    position: absolute;
    top: -12px;
    left: 0;
    right: 0;
    height: 12px;
}

/* Right-align dropdowns that are near the right side of the nav bar */
.nav-dropdown:nth-last-child(2) .dropdown-panel,
.nav-dropdown:nth-last-child(3) .dropdown-panel,
.dropdown-panel.mega-panel {
    left: auto;
    right: 0;
}

.dropdown-panel.mega-panel {
    min-width: 760px;
}

@media (min-width: 961px) {
    .academic-nav,
    .academic-nav-list {
        overflow: visible !important;
    }
    /* Desktop: click to open (stays open), hover also opens for smooth UX */
    .nav-dropdown:hover > .dropdown-panel,
    .nav-dropdown.open > .dropdown-panel,
    .nav-dropdown:focus-within > .dropdown-panel {
        display: block !important;
        opacity: 1 !important;
        visibility: visible !important;
        pointer-events: auto !important;
        transform: translateY(0) !important;
    }
}

.dropdown-grid {
    display: grid;
    gap: 1.25rem;
}

.dropdown-grid.cols-2 {
    grid-template-columns: repeat(2, 1fr);
}

.dropdown-grid.cols-3 {
    grid-template-columns: repeat(3, 1fr);
}

.dropdown-grid.cols-4 {
    grid-template-columns: repeat(4, 1fr);
}

.dropdown-group {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.dropdown-group-title {
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.09em;
    color: var(--color-text-secondary);
    padding: 0.3rem 0.6rem 0.3rem 0.5rem;
    border-bottom: 1px dashed var(--color-border);
    margin-bottom: 0.35rem;
    border-radius: 5px;
    cursor: pointer !important;
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    user-select: none !important;
    transition: background 0.15s ease, color 0.15s ease !important;
}

.dropdown-group-title:hover {
    background: rgba(0, 87, 184, 0.06) !important;
    color: var(--color-accent) !important;
}

html[data-theme="dark"] .dropdown-group-title:hover {
    background: rgba(56, 189, 248, 0.08) !important;
    color: #38BDF8 !important;
}

.dropdown-group-title::after {
    content: '▾';
    font-size: 0.7rem;
    opacity: 0.6;
    transition: transform 0.22s ease, opacity 0.2s ease;
    margin-left: 0.5rem;
    flex-shrink: 0;
}

.dropdown-group-title:hover::after {
    opacity: 1;
}

.dropdown-group.group-collapsed .dropdown-group-title::after {
    transform: rotate(-90deg);
}

.dropdown-group.group-collapsed .dropdown-group-title {
    margin-bottom: 0 !important;
    border-bottom-color: transparent !important;
}

.dropdown-group.group-collapsed .dropdown-item {
    display: none !important;
}

.dropdown-item {
    display: block;
    padding: 0.35rem 0.6rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text);
    text-decoration: none;
    border-radius: 6px;
    transition: background 0.15s ease, color 0.15s ease, transform 0.15s ease;
    white-space: nowrap;
}

.dropdown-item:hover {
    background: rgba(0, 87, 184, 0.07);
    color: var(--color-accent);
    transform: translateX(3px);
}

.dropdown-item.active {
    background: rgba(0, 87, 184, 0.12);
    color: var(--color-accent);
    font-weight: 700;
}

.dropdown-item.highlight-amber { color: #D97706; }
.dropdown-item.highlight-emerald { color: #10B981; }
.dropdown-item.highlight-sky { color: #0284C7; }
.dropdown-item.highlight-rose { color: #EF4444; }
.dropdown-item.highlight-purple { color: #8B5CF6; }

.dropdown-item.highlight-amber:hover { color: #B45309; background: rgba(217, 119, 6, 0.1); }
.dropdown-item.highlight-emerald:hover { color: #059669; background: rgba(16, 185, 129, 0.1); }
.dropdown-item.highlight-sky:hover { color: #0369A1; background: rgba(2, 132, 199, 0.1); }
.dropdown-item.highlight-rose:hover { color: #DC2626; background: rgba(239, 68, 68, 0.1); }
.dropdown-item.highlight-purple:hover { color: #7C3AED; background: rgba(139, 92, 246, 0.1); }

/* ── Dark Mode Dropdown Overrides ── */
html[data-theme="dark"] .dropdown-panel {
    background: #181E29;
    border-color: rgba(255, 255, 255, 0.12);
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.05);
}

html[data-theme="dark"] .dropdown-group-title {
    color: #94A3B8;
    border-bottom-color: rgba(255, 255, 255, 0.1);
}

html[data-theme="dark"] .dropdown-item {
    color: #CBD5E1;
}

html[data-theme="dark"] .dropdown-item:hover {
    background: rgba(56, 189, 248, 0.12);
    color: #38BDF8;
}

html[data-theme="dark"] .dropdown-item.active {
    background: rgba(56, 189, 248, 0.2);
    color: #38BDF8;
}

/* ── Desktop & Laptop Intermediate Auto-Fit ── */
@media (min-width: 961px) {
    .academic-nav-list > li > a > .nav-icon,
    .academic-nav-list > li > .dropdown-toggle > .nav-icon {
        display: none !important;
    }
    .card-right-group {
        flex-shrink: 0 !important;
        z-index: 10 !important;
        position: relative !important;
    }
}
@media (min-width: 961px) and (max-width: 1250px) {
    .academic-nav-list {
        gap: 0.08rem !important;
    }
    .academic-nav-list li a,
    .dropdown-toggle {
        padding: 0.25rem 0.35rem !important;
        font-size: 0.78rem !important;
        gap: 0.15rem !important;
    }
    .pill-brand-logo {
        max-width: 130px !important;
    }
}

/* ── Mobile Responsive Drawer ── */
@media (max-width: 960px) {
    .mobile-menu-btn {
        display: inline-flex;
    }

    /* Drawer panel */
    .academic-nav {
        display: none;
        position: absolute;
        top: calc(100% + 8px);
        left: 1rem;
        right: 1rem;
        width: calc(100% - 2rem);
        background: var(--color-surface);
        border: 1px solid var(--color-border);
        border-radius: 16px;
        box-shadow: 0 24px 60px rgba(0, 0, 0, 0.25), 0 4px 16px rgba(0, 0, 0, 0.1);
        padding: 0.75rem 0.65rem;
        max-height: calc(90vh - 80px);
        overflow-y: auto;
        z-index: 9999;
        scroll-behavior: smooth;
    }

    .academic-nav.mobile-active {
        display: block;
        animation: mobileDrawerSlide 0.28s cubic-bezier(0.16, 1, 0.3, 1);
    }

    @keyframes mobileDrawerSlide {
        from { opacity: 0; transform: translateY(-12px); }
        to   { opacity: 1; transform: translateY(0); }
    }

    /* Flat nav list */
    .academic-nav-list {
        flex-direction: column;
        align-items: stretch;
        gap: 0.2rem;
    }

    /* Direct links (Home, Blogs, Newsletter, About Me) */
    .academic-nav-list > li > a {
        display: flex;
        align-items: center;
        gap: 0.55rem;
        width: 100%;
        padding: 0.65rem 0.85rem;
        border-radius: 10px;
        font-size: 0.875rem;
        font-weight: 600;
        color: var(--color-text);
        text-decoration: none;
        transition: background 0.15s ease;
    }

    .academic-nav-list > li > a:hover,
    .academic-nav-list > li > a.active {
        background: rgba(0, 87, 184, 0.08);
        color: var(--color-accent);
    }

    html[data-theme="dark"] .academic-nav-list > li > a:hover,
    html[data-theme="dark"] .academic-nav-list > li > a.active {
        background: rgba(56, 189, 248, 0.1);
        color: #38BDF8;
    }

    /* Special badge links (Research Pathway, Observer Pro) */
    .card-badge-purple,
    .card-badge-amber {
        display: flex !important;
        align-items: center !important;
        gap: 0.4rem !important;
        width: 100% !important;
        padding: 0.65rem 0.85rem !important;
        border-radius: 10px !important;
    }

    /* Divider between direct links and dropdown sections */
    .academic-nav-list li:has(.nav-dropdown) + li:not(:has(.nav-dropdown)),
    .nav-mobile-divider {
        border-top: 1px solid var(--color-border);
        margin-top: 0.4rem;
        padding-top: 0.4rem;
    }

    /* Accordion section header (top-level dropdown toggle) */
    .dropdown-toggle {
        display: flex !important;
        align-items: center !important;
        width: 100% !important;
        justify-content: space-between !important;
        padding: 0.65rem 0.85rem !important;
        border-radius: 10px !important;
        border: none !important;
        background: transparent !important;
        cursor: pointer;
        font-size: 0.875rem;
        font-weight: 700;
        color: var(--color-text);
        text-align: left;
        transition: background 0.15s ease;
        gap: 0.5rem;
    }

    .dropdown-toggle:hover {
        background: rgba(0, 0, 0, 0.05) !important;
    }

    html[data-theme="dark"] .dropdown-toggle:hover {
        background: rgba(255, 255, 255, 0.06) !important;
    }

    .nav-dropdown.open > .dropdown-toggle {
        background: rgba(0, 87, 184, 0.07) !important;
        color: var(--color-accent) !important;
        border-radius: 10px 10px 0 0 !important;
    }

    html[data-theme="dark"] .nav-dropdown.open > .dropdown-toggle {
        background: rgba(56, 189, 248, 0.1) !important;
        color: #38BDF8 !important;
    }

    /* Dropdown panel becomes accordion body */
    .dropdown-panel {
        position: static !important;
        transform: none !important;
        opacity: 1 !important;
        visibility: visible !important;
        pointer-events: auto !important;
        display: none;
        box-shadow: none !important;
        border: 1px solid var(--color-border) !important;
        border-top: none !important;
        background: var(--color-bg) !important;
        padding: 0.65rem 0.65rem 0.65rem 0.85rem !important;
        min-width: 100% !important;
        border-radius: 0 0 10px 10px !important;
        margin-bottom: 0.1rem;
    }

    .nav-dropdown.open .dropdown-panel {
        display: block;
        animation: accordionOpen 0.22s ease;
    }

    @keyframes accordionOpen {
        from { opacity: 0; transform: translateY(-4px); }
        to   { opacity: 1; transform: translateY(0); }
    }

    /* Inside the panel: sub-group titles become secondary collapse headers */
    .dropdown-grid {
        grid-template-columns: 1fr !important;
        gap: 0 !important;
    }

    .dropdown-group {
        border-bottom: 1px dashed var(--color-border);
        padding-bottom: 0.3rem;
        margin-bottom: 0.3rem;
    }

    .dropdown-group:last-child {
        border-bottom: none;
        margin-bottom: 0;
        padding-bottom: 0;
    }

    .dropdown-group-title {
        padding: 0.45rem 0.5rem !important;
        font-size: 0.7rem !important;
        font-weight: 800 !important;
        letter-spacing: 0.09em !important;
        color: var(--color-text-secondary) !important;
        text-transform: uppercase !important;
        border-bottom: none !important;
        margin-bottom: 0.25rem !important;
        border-radius: 6px;
    }

    .dropdown-group-title:hover {
        background: rgba(0, 0, 0, 0.04) !important;
    }

    html[data-theme="dark"] .dropdown-group-title:hover {
        background: rgba(255, 255, 255, 0.05) !important;
    }

    .dropdown-group.group-collapsed .dropdown-item {
        display: none !important;
    }

    /* Items inside accordion */
    .dropdown-item {
        display: flex !important;
        padding: 0.4rem 0.6rem !important;
        font-size: 0.8125rem !important;
        border-radius: 7px !important;
        transition: background 0.12s ease, color 0.12s ease !important;
    }

    .dropdown-item:hover {
        transform: none !important;
        background: rgba(0, 87, 184, 0.07) !important;
    }

    html[data-theme="dark"] .dropdown-item:hover {
        background: rgba(56, 189, 248, 0.08) !important;
    }

    /* Separator line between flat links and accordion dropdowns */
    li.nav-sep {
        height: 1px;
        background: var(--color-border);
        margin: 0.4rem 0.3rem;
        pointer-events: none;
    }
}


/* Search Input & Ctrl K Badge */
.academic-header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.academic-search-form {
    position: relative;
    display: flex;
    align-items: center;
}

.academic-search-form input {
    padding: 0.45rem 4.25rem 0.45rem 2.25rem;
    font-family: var(--font-body);
    font-size: 0.8125rem;
    border: 1px solid var(--color-border);
    border-radius: 100px;
    background: var(--color-bg);
    color: var(--color-text);
    width: 210px;
    transition: border-color 0.2s, width 0.2s, box-shadow 0.2s;
}

.academic-search-form input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(0, 87, 184, 0.15);
    width: 240px;
}

.search-icon-svg {
    position: absolute;
    left: 0.75rem;
    color: var(--color-text-secondary);
    pointer-events: none;
}

.search-shortcut {
    position: absolute;
    right: 0.6rem;
    font-family: var(--font-body);
    font-size: 0.6875rem;
    font-weight: 700;
    color: var(--color-text-secondary);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 4px;
}

.fan-stack {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 410px;
    perspective: 1200px;
}

/* ── 3D Fan Stack Layout & Components ─────────────────────────────── */
.fan-card,
.fan-book-cover {
    position: absolute;
    display: flex !important;
    flex-direction: column !important;
    justify-content: flex-start !important;
    align-items: stretch !important;
    text-align: left !important;
    padding: 0 !important;
    border-radius: 16px !important;
    overflow: hidden !important;
    transition: transform 0.35s ease, box-shadow 0.35s ease !important;
}

/* Outer Fanned Cards — Blog Card Style */
.fan-card {
    width: 260px;
    height: 365px;
    background: #FFFFFF;
    border: 1px solid #E2E8F0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06), 0 10px 25px -4px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .fan-card {
    background: #242424;
    border-color: #333333;
    box-shadow: 0 10px 25px -4px rgba(0, 0, 0, 0.35);
}

/* Excerpt text below tabs */
.fan-card-excerpt {
    font-size: 0.725rem !important;
    color: var(--color-text-secondary) !important;
    line-height: 1.4 !important;
    margin: 0.1rem 0 !important;
    font-style: italic !important;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    width: 100%;
}

.fan-book-cover .fan-card-excerpt {
    color: rgba(255, 255, 255, 0.65) !important;
}

/* Horizontal divider */
.fan-card-divider {
    width: 100% !important;
    height: 1px !important;
    background: var(--color-border) !important;
    margin: 0.2rem 0 !important;
    flex-shrink: 0 !important;
}

.fan-book-cover .fan-card-divider {
    background: rgba(255, 255, 255, 0.15) !important;
}

/* Detail rows (Lead Researcher / Publication Journal / Topic) */
.fan-card-details {
    display: flex !important;
    flex-direction: column !important;
    gap: 0.15rem !important;
    width: 100% !important;
    flex-shrink: 0 !important;
}

.fan-detail-row {
    display: flex !important;
    align-items: flex-start !important;
    justify-content: space-between !important;
    gap: 0.35rem !important;
    font-size: 0.65rem !important;
    line-height: 1.25 !important;
}

.fan-detail-label {
    display: flex !important;
    align-items: center !important;
    gap: 0.25rem !important;
    color: var(--color-text-secondary) !important;
    font-weight: 500 !important;
    white-space: nowrap !important;
    flex-shrink: 0 !important;
}

.fan-book-cover .fan-detail-label {
    color: rgba(255, 255, 255, 0.55) !important;
}

.fan-detail-label svg {
    flex-shrink: 0 !important;
    opacity: 0.7;
}

.fan-detail-value {
    font-weight: 700 !important;
    text-align: right !important;
    font-size: 0.65rem !important;
}

.fan-detail-value.value-dark {
    color: var(--color-text) !important;
}

.fan-book-cover .fan-detail-value.value-dark {
    color: #FFFFFF !important;
}

.fan-detail-value.value-emerald {
    color: #059669 !important;
}

.fan-detail-value.value-amber {
    color: #D97706 !important;
}

/* Central featured card — keep dark theme with proper colors */
.fan-book-cover {
    width: 280px;
    height: 385px;
    background: #191919 !important;
    border: 2px solid #38BDF8 !important;
    color: #FFFFFF !important;
    z-index: 10;
    box-shadow: 0 14px 30px -5px rgba(0, 0, 0, 0.6), 0 0 18px rgba(56, 189, 248, 0.2) !important;
}

.fan-book-cover:hover {
    transform: translateY(-8px) scale(1.03) !important;
    box-shadow: 0 24px 50px -5px rgba(0, 0, 0, 0.8), 0 0 25px rgba(56, 189, 248, 0.35) !important;
}

/* Top Media Banner — Blog Card Style (logo bar) */
.fan-card .fan-card-top-media,
.fan-book-cover .fan-card-top-media {
    width: 100% !important;
    height: 55px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    text-align: center !important;
    padding: 0.35rem 0.75rem !important;
    margin: 0 !important;
    flex-shrink: 0 !important;
    border-top-left-radius: 15px !important;
    border-top-right-radius: 15px !important;
}

.fan-card .fan-card-top-media {
    background: #F8FAFC !important;
    border-bottom: 1px solid #E2E8F0 !important;
}

[data-theme="dark"] .fan-card .fan-card-top-media {
    background: #0F172A !important;
    border-color: #334155 !important;
}

.fan-book-cover .fan-card-top-media {
    background: #0F172A !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12) !important;
}

.fan-card-logo,
.fan-card-top-media img {
    margin: 0 auto !important;
    width: 80% !important;
    max-width: 170px !important;
    height: auto !important;
    max-height: 48px !important;
    object-fit: contain !important;
}

/* Light / Dark Theme Logo Display Rules */
.fan-card-top-media img.logo-light { display: block !important; }
.fan-card-top-media img.logo-dark  { display: none !important; }

[data-theme="dark"] .fan-card-top-media img.logo-light { display: none !important; }
[data-theme="dark"] .fan-card-top-media img.logo-dark  { display: block !important; }

.fan-book-cover img.fan-central-logo { display: block !important; }

/* Body Section — Left-Aligned Blog Card Style */
.fan-card-body {
    padding: 0.55rem 0.85rem 0.25rem 0.85rem !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 0.2rem !important;
    width: 100% !important;
    flex: 1 !important;
    text-align: left !important;
}

/* Category Badge Pill — Blog Card Style */
.fan-card .status-active-badge,
.fan-book-cover .status-active-badge {
    font-size: 0.6875rem !important;
    font-weight: 700 !important;
    border-radius: 100px !important;
    padding: 0.2rem 0.75rem !important;
    letter-spacing: 0.02em !important;
    display: inline-block !important;
    align-self: flex-start !important;
}

.fan-card .status-active-badge {
    background: #FFFBEB !important;
    color: #D97706 !important;
    border: 1px solid #FDE68A !important;
}

[data-theme="dark"] .fan-card .status-active-badge {
    background: rgba(217, 119, 6, 0.15) !important;
    color: #FBBF24 !important;
    border: 1px solid rgba(251, 191, 36, 0.3) !important;
}

.fan-book-cover .status-active-badge {
    background: rgba(217, 119, 6, 0.15) !important;
    color: #FBBF24 !important;
    border: 1.5px solid #D97706 !important;
}

/* Title — Blog Card Style (left-aligned, clamp to 3 lines) */
.fan-card-title {
    font-size: 0.8125rem !important;
    font-weight: 800 !important;
    line-height: 1.35 !important;
    margin: 0.1rem 0 0 0 !important;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-align: left !important;
    width: 100% !important;
}

.fan-center-title {
    font-size: 0.875rem !important;
}

.fan-card .fan-card-title a {
    color: var(--color-text) !important;
    text-decoration: none !important;
    transition: color 0.15s !important;
}
.fan-card .fan-card-title a:hover { color: #D97706 !important; }

.fan-book-cover .fan-card-title a {
    color: #FFFFFF !important;
    text-decoration: none !important;
}
.fan-book-cover .fan-card-title a:hover { color: #FBBF24 !important; }

/* Sub-Nav Tabs (DISPATCH / READ) — left-aligned */
.fan-mini-tabs {
    display: flex !important;
    align-items: center !important;
    justify-content: flex-start !important;
    gap: 0.6rem !important;
    border-bottom: 1px solid #E2E8F0 !important;
    padding-bottom: 0.2rem !important;
    margin-top: 0.1rem !important;
    width: 100% !important;
}

.fan-book-cover .fan-mini-tabs {
    border-color: rgba(255, 255, 255, 0.15) !important;
}

.fan-mini-tabs .card-tab {
    font-size: 0.625rem !important;
    font-weight: 700 !important;
    color: var(--color-text-secondary) !important;
    letter-spacing: 0.06em !important;
    text-transform: uppercase !important;
}

.fan-book-cover .fan-mini-tabs .card-tab { color: rgba(255, 255, 255, 0.7) !important; }

.fan-mini-tabs .card-tab.active {
    color: #D97706 !important;
    border-bottom: 2px solid #D97706 !important;
    padding-bottom: 0.15rem !important;
}

.fan-book-cover .fan-mini-tabs .card-tab.active {
    color: #FBBF24 !important;
    border-color: #FBBF24 !important;
}

/* Bottom Metric Pills — left-aligned horizontal row */
.fan-card-metrics {
    padding: 0.3rem 0.6rem 0.35rem 0.6rem !important;
    display: flex !important;
    flex-direction: row !important;
    align-items: center !important;
    justify-content: flex-start !important;
    gap: 0.3rem !important;
    flex-wrap: nowrap !important;
    width: 100% !important;
    max-width: 100% !important;
    flex-shrink: 0 !important;
    box-sizing: border-box !important;
    overflow: hidden !important;
}

.fan-card-metrics .metric-pill {
    font-size: 0.625rem !important;
    font-weight: 800 !important;
    padding: 0.2rem 0.45rem !important;
    border-radius: 6px !important;
    white-space: nowrap !important;
    color: #FFFFFF !important;
    border: none !important;
    display: inline-flex !important;
    align-items: center !important;
    gap: 0.25rem !important;
    line-height: 1 !important;
    max-width: 100% !important;
}

.fan-card-metrics .metric-pill.pill-emerald { background: #10B981 !important; color: #FFFFFF !important; }
.fan-card-metrics .metric-pill.pill-amber   { background: #D97706 !important; color: #FFFFFF !important; }

.fan-card-metrics .metric-pill svg {
    width: 10px !important;
    height: 10px !important;
    stroke: #FFFFFF !important;
    stroke-width: 2.5 !important;
    flex-shrink: 0 !important;
}

/* Fan Position / Rotation */
.fan-card-1 { transform: translateX(-340px) rotate(-14deg) scale(0.9);  z-index: 2; }
.fan-card-2 { transform: translateX(-180px) rotate(-7deg)  scale(0.95); z-index: 5; }
.fan-card-3 { transform: translateX(180px)  rotate(7deg)   scale(0.95); z-index: 5; }
.fan-card-4 { transform: translateX(340px)  rotate(14deg)  scale(0.9);  z-index: 2; }

.fan-stack:hover .fan-card-1 { transform: translateX(-370px) rotate(-16deg) scale(0.92); }
.fan-stack:hover .fan-card-2 { transform: translateX(-195px) rotate(-8deg)  scale(0.97); }
.fan-stack:hover .fan-card-3 { transform: translateX(195px)  rotate(8deg)   scale(0.97); }
.fan-stack:hover .fan-card-4 { transform: translateX(370px)  rotate(16deg)  scale(0.92); }

.fan-card-badge {
    font-size: 0.6875rem;
    font-weight: 800;
    color: #2563EB;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.fan-card-preview {
    background: var(--color-surface);
    border-radius: 6px;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.preview-box { font-size: 1.25rem; }

.fan-card-preview p {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    margin: 0;
    line-height: 1.2;
}


/* Copy below fan */
.fan-hero-copy {
    max-width: 800px;
    margin: 0 auto;
    text-align: center !important;
}

.fan-hero-headline {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 900;
    line-height: 1.18;
    color: var(--color-text);
    margin-bottom: 1rem;
    letter-spacing: -0.015em;
    text-align: center !important;
}

.fan-hero-subtext {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    line-height: 1.55;
    margin-bottom: 1.75rem;
    text-align: center !important;
}

.fan-hero-actions {
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
    text-align: center !important;
    margin: 0 auto !important;
}

.btn-fan-primary {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 0.6rem !important;
    padding: 0.875rem 2.25rem !important;
    background: #000000 !important;
    color: #FFFFFF !important;
    border-radius: 10px !important;
    font-weight: 800 !important;
    font-size: 0.9375rem !important;
    text-decoration: none !important;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25) !important;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease !important;
}

.btn-fan-primary:hover {
    background: #1A1A1A !important;
    color: #FFFFFF !important;
    transform: translateY(-2px) !important;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35) !important;
    text-decoration: none !important;
}

html[data-theme="dark"] .btn-fan-primary,
[data-theme="dark"] .btn-fan-primary {
    background: #FFFFFF !important;
    color: #0F172A !important;
    box-shadow: 0 4px 16px rgba(255, 255, 255, 0.2) !important;
}

html[data-theme="dark"] .btn-fan-primary:hover,
[data-theme="dark"] .btn-fan-primary:hover {
    background: #F1F5F9 !important;
    color: #000000 !important;
    transform: translateY(-2px) !important;
    box-shadow: 0 8px 24px rgba(255, 255, 255, 0.35) !important;
    text-decoration: none !important;
}



.academic-search-form .search-icon {
    position: absolute;
    left: 0.6rem;
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    pointer-events: none;
}

/* ─── Academic 3-Column Hero Grid ────────────────────────────────── */
.academic-hero-section {
    margin-bottom: 3rem;
}

.academic-hero-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 0.9fr;
    gap: 2rem;
    align-items: start;
}

/* Column 1: Primary Feature Card */
.academic-primary-card {
    display: flex;
    flex-direction: column;
    background: #FFFFFF;
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 1.5rem;
    color: var(--color-text);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

[data-theme="dark"] .academic-primary-card {
    background: #242424;
    border-color: #333333;
    color: #FFFFFF;
}

.academic-primary-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.12);
}

.primary-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.primary-card-link:hover { text-decoration: none; }

.primary-image-box {
    width: 100%;
    height: 310px;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 1.25rem;
    background: var(--color-surface);
}

.primary-image-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.35s ease;
}

.academic-primary-card:hover .primary-image-box img {
    transform: scale(1.04);
}

.category-tag {
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    color: #2563EB;
    text-transform: uppercase;
    display: inline-block;
    margin-bottom: 0.4rem;
}

[data-theme="dark"] .category-tag {
    color: #38BDF8;
}

.primary-title {
    font-size: 1.875rem;
    font-weight: 800;
    line-height: 1.2;
    color: var(--color-text);
    margin-bottom: 0.6rem;
    letter-spacing: -0.01em;
}

[data-theme="dark"] .primary-title {
    color: #FFFFFF;
}

.primary-title:hover {
    color: var(--color-accent);
}

.primary-excerpt {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin-bottom: 1.25rem;
}

[data-theme="dark"] .primary-excerpt {
    color: #A3A3A3;
}

.primary-byline {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    gap: 0.4rem;
    border-top: 1px solid var(--color-border);
    padding-top: 0.75rem;
    margin-top: auto;
}

[data-theme="dark"] .primary-byline {
    color: #A3A3A3;
    border-top-color: #333333;
}

.primary-byline strong {
    color: var(--color-text);
}

[data-theme="dark"] .primary-byline strong {
    color: #FFFFFF;
}

/* Column 2: Secondary Stack */
.academic-secondary-stack {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.academic-secondary-card {
    display: flex;
    flex-direction: column;
    background: #FFFFFF;
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 1.25rem;
    color: var(--color-text);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

[data-theme="dark"] .academic-secondary-card {
    background: #242424;
    border-color: #333333;
    color: #FFFFFF;
}

.academic-secondary-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.12);
}

.secondary-card-link {
    text-decoration: none;
    color: inherit;
}

.secondary-image-box {
    width: 100%;
    height: 180px;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 0.875rem;
    background: var(--color-surface);
}

.secondary-image-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.25s ease;
}

.academic-secondary-card:hover .secondary-image-box img {
    transform: scale(1.03);
}

.secondary-title {
    font-size: 1.1875rem;
    font-weight: 800;
    line-height: 1.28;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

[data-theme="dark"] .secondary-title {
    color: #FFFFFF;
}

.secondary-byline {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    gap: 0.35rem;
    border-top: 1px solid var(--color-border);
    padding-top: 0.75rem;
    margin-top: auto;
}

[data-theme="dark"] .secondary-byline {
    color: #A3A3A3;
    border-top-color: #333333;
}

.author-name {
    font-weight: 600;
    color: var(--color-text);
}

[data-theme="dark"] .author-name {
    color: #FFFFFF;
}

.academic-secondary-placeholder {
    display: flex;
    flex-direction: column;
}

.placeholder-media-box {
    width: 100%;
    height: 180px;
    background: #1E1B4B;
    color: #818CF8;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    border-radius: var(--radius-sm);
    margin-bottom: 0.875rem;
}

/* Column 3: Trending Stack */
.academic-trending-stack {
    border-left: 1px solid var(--color-border);
    padding-left: 1.5rem;
}

.trending-header {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin-bottom: 1.25rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-text);
}

.trending-heading {
    font-size: 0.84375rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    color: var(--color-text);
    text-transform: uppercase;
}

.trending-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.trending-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    background: #FFFFFF;
    border: 1px solid var(--color-border);
    border-radius: 14px;
    padding: 0.875rem 1rem;
    color: var(--color-text);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

[data-theme="dark"] .trending-item {
    background: #242424;
    border-color: #333333;
    color: #FFFFFF;
}

.trending-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.1);
}

.trending-num {
    font-size: 2.25rem;
    font-weight: 900;
    color: #CBD5E1;
    line-height: 1;
    font-family: var(--font-body);
}

[data-theme="dark"] .trending-num {
    color: #475569;
}

.trending-tag {
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    padding: 0.15rem 0.5rem;
    text-transform: uppercase;
    display: inline-block;
    margin-bottom: 0.25rem;
}

.trending-title {
    font-size: 0.9375rem;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 0.25rem;
}

.trending-title a {
    color: #FFFFFF;
    text-decoration: none;
}

.trending-title a:hover {
    color: rgba(255, 255, 255, 0.8);
}

.trending-desc {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.88);
    line-height: 1.4;
    margin-bottom: 0;
}

.search-form button {
    position: absolute;
    right: 4px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-secondary);
    padding: 0.4rem;
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.search-form button:hover {
    color: var(--color-accent);
}

/* Search suggestions dropdown */
.search-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
    z-index: 50;
    margin-top: 4px;
}

.search-suggestion {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--color-text);
    font-size: 0.875rem;
    text-decoration: none;
    border-bottom: 1px solid var(--color-border);
}

.search-suggestion:last-child { border-bottom: none; }

.search-suggestion:hover,
.search-suggestion:focus {
    background: var(--color-surface);
    text-decoration: none;
}

/* Font toggle */
.font-toggle {
    display: flex;
    gap: 2px;
}

.font-btn {
    background: none;
    border: 1px solid var(--color-border);
    padding: 0.35rem 0.6rem;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
}

/* ─── Theme Switcher Toggle ────────────────────────────────────── */
.theme-toggle-btn {
    background: none;
    border: 1px solid var(--color-border);
    padding: 0.4rem;
    cursor: pointer;
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
}

.theme-toggle-btn:hover {
    background: var(--color-surface);
    color: var(--color-accent);
    border-color: var(--color-accent);
}

.theme-toggle-btn .icon-sun {
    display: block;
}

.theme-toggle-btn .icon-moon {
    display: none;
}

[data-theme="dark"] .theme-toggle-btn .icon-sun {
    display: none;
}

[data-theme="dark"] .theme-toggle-btn .icon-moon {
    display: block;
    color: #38BDF8;
}

/* ─── Dark Quantum Color Palette Variables (#191919 Theme) ───── */
[data-theme="dark"] {
    --color-bg: #0D0D0D;
    --color-surface: #191919;
    --color-card-bg: #191919;
    --color-text: #F8FAFC;
    --color-text-secondary: #94A3B8;
    --color-border: #2A2A2A;
    --color-accent: #38BDF8;
    --color-accent-hover: #7DD3FC;
}

[data-theme="dark"] body {
    background-color: var(--color-bg);
    color: var(--color-text);
}

[data-theme="dark"] .site-header,
[data-theme="dark"] .site-footer {
    background: #191919 !important;
    border-color: #2A2A2A !important;
}

[data-theme="dark"] .site-logo {
    color: #FFFFFF;
}

[data-theme="dark"] .site-logo span {
    color: #38BDF8;
}

[data-theme="dark"] .hero-primary-card,
[data-theme="dark"] .hero-secondary-card,
[data-theme="dark"] .spotlight-card,
[data-theme="dark"] .stats-banner,
[data-theme="dark"] .header-banner,
[data-theme="dark"] .page-header {
    background: var(--color-surface);
    border-color: var(--color-border);
    color: var(--color-text);
}

[data-theme="dark"] .sidebar-widget {
    background: linear-gradient(135deg, #064E3B 0%, #022C22 100%);
    border-color: rgba(52, 211, 153, 0.3);
    color: #FFFFFF;
}

[data-theme="dark"] .hero-primary-title,
[data-theme="dark"] .hero-secondary-title,
[data-theme="dark"] .spotlight-title a,
[data-theme="dark"] .page-title,
[data-theme="dark"] .section-heading {
    color: #FFFFFF;
}

[data-theme="dark"] .hero-primary-subtitle,
[data-theme="dark"] .hero-primary-excerpt,
[data-theme="dark"] .page-description {
    color: #A3A3A3;
}

[data-theme="dark"] .card-badge-floating {
    background: rgba(255, 255, 255, 0.18);
    color: #FFFFFF;
    border-color: rgba(255, 255, 255, 0.25);
}

[data-theme="dark"] .card-bookmark-btn {
    background: #2E2E2E;
    color: #A3A3A3;
    border-color: #404040;
}

[data-theme="dark"] .card-bookmark-btn:hover {
    color: #38BDF8;
    border-color: #38BDF8;
}

[data-theme="dark"] .topic-tab {
    background: #242424;
    color: #A3A3A3;
    border-color: #333333;
}

[data-theme="dark"] .topic-tab.active {
    background: #38BDF8;
    color: #191919;
    border-color: #38BDF8;
}

[data-theme="dark"] .sort-tab {
    background: #242424;
    color: #A3A3A3;
    border-color: #333333;
}

[data-theme="dark"] .sort-tab.active {
    background: #38BDF8;
    color: #191919;
    border-color: #38BDF8;
}

[data-theme="dark"] .btn-load-more {
    background: linear-gradient(135deg, #38BDF8 0%, #0284C7 100%);
    color: #0F172A;
    box-shadow: 0 4px 14px rgba(56, 189, 248, 0.3);
}

[data-theme="dark"] .btn-load-more:hover {
    background: linear-gradient(135deg, #7DD3FC 0%, #38BDF8 100%);
    box-shadow: 0 8px 20px rgba(56, 189, 248, 0.45);
    color: #0F172A;
}

[data-theme="dark"] .site-footer {
    background: #191919 !important;
    border-color: #2A2A2A !important;
    color: var(--color-text-secondary);
}

/* Mobile menu */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text);
    padding: 0.5rem;
    min-width: 44px;
    min-height: 44px;
    align-items: center;
    justify-content: center;
}

.mobile-nav {
    padding: 1rem;
    border-top: 1px solid var(--color-border);
}

.mobile-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.mobile-nav li a {
    display: block;
    padding: 0.75rem 0;
    color: var(--color-text);
    border-bottom: 1px solid var(--color-border);
    font-size: 1rem;
}

.mobile-nav li a:hover {
    color: var(--color-accent);
    text-decoration: none;
}

/* ─── Page Layout (100% Centered Layout) ─────────────────────── */
.main-grid {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    max-width: 1240px;
    margin: 0 auto;
    width: 100%;
    gap: 3rem;
}

.main-content {
    width: 100%;
    max-width: 1240px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.sidebar {
    width: 100%;
    max-width: 1100px;
    margin: 3.5rem auto 0 auto;
    padding-top: 2.5rem;
    border-top: 2px solid var(--color-border);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.75rem;
}

.page-header {
    margin-bottom: 2rem;
    text-align: center;
}

.page-title {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.page-description {
    color: var(--color-text-secondary);
    font-size: 1.0625rem;
    margin-bottom: 0;
}

/* ─── Section Headings ─────────────────────────────────────────── */
.section-heading {
    font-size: 1.125rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-secondary);
    margin-bottom: 1.25rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-accent);
    display: inline-block;
}

/* ─── Featured Articles ───────────────────────────────────────── */
.featured-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.featured-card {
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: box-shadow 0.2s, transform 0.2s;
}

.featured-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.featured-link {
    display: grid;
    grid-template-columns: 1fr 1fr;
    text-decoration: none;
    color: inherit;
}

.featured-link:hover { text-decoration: none; }

.featured-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.featured-body {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.featured-title {
    font-size: 1.375rem;
    margin: 0.5rem 0;
    line-height: 1.3;
}

.featured-excerpt {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ─── Article Cards Grid ───────────────────────────────────────── */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.75rem;
    margin-bottom: 2.5rem;
    justify-content: center;
    justify-items: center;
    align-items: stretch;
}

.articles-grid-3 {
    grid-template-columns: repeat(3, 1fr);
    justify-content: center;
    justify-items: center;
}

.article-card {
    border: 1px solid var(--color-border);
    border-radius: 16px;
    overflow: hidden;
    transition: box-shadow 0.35s ease, transform 0.35s ease;
    background: #FFFFFF;
    color: var(--color-text);
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
    isolation: isolate;
    transform: translateZ(0);
    width: 100%;
    margin: 0 auto;
}

[data-theme="dark"] .article-card {
    background: #242424;
    border-color: #333333;
    color: #FFFFFF;
}

.article-card:hover {
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.12);
    transform: translateY(-4px) translateZ(0);
}

.card-media-wrapper {
    position: relative;
    width: 100%;
    overflow: hidden;
    background: var(--color-surface);
    border-top-left-radius: 15px;
    border-top-right-radius: 15px;
    border-bottom: 1px solid var(--color-border);
}

.card-media-link {
    display: block;
    width: 100%;
    height: 100%;
    text-decoration: none;
}

.card-image-box {
    width: 100%;
    height: 190px;
    overflow: hidden;
    background: var(--color-surface);
    border-top-left-radius: 15px;
    border-top-right-radius: 15px;
}

.card-image-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-top-left-radius: 15px;
    border-top-right-radius: 15px;
    transition: transform 0.35s ease;
}

.article-card:hover .card-image-box img {
    transform: scale(1.05);
}

.card-image-placeholder {
    width: 100%;
    height: 210px;
    background: linear-gradient(135deg, #F9FAFB 0%, #E5E7EB 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder-icon {
    font-size: 2.5rem;
    color: var(--color-accent);
}

.card-badge-floating {
    position: absolute;
    top: 0.875rem;
    left: 50%;
    transform: translateX(-50%);
    background: #FFFFFF;
    color: #2563EB;
    font-size: 0.725rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 0.3rem 0.75rem;
    border-radius: 100px;
    border: 1px solid var(--color-border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    text-decoration: none;
    z-index: 2;
    white-space: nowrap;
    transition: background 0.15s, color 0.15s, transform 0.15s;
}

[data-theme="dark"] .card-badge-floating {
    background: #1E293B;
    color: #38BDF8;
    border-color: #334155;
}

.card-badge-floating:hover {
    background: var(--color-accent);
    color: #FFFFFF;
    transform: translateX(-50%) scale(1.05);
    text-decoration: none;
}

.card-bookmark-btn {
    position: absolute;
    top: 0.875rem;
    right: 0.875rem;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #FFFFFF;
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    z-index: 2;
    transition: all 0.15s ease;
}

[data-theme="dark"] .card-bookmark-btn {
    background: #1E293B;
    border-color: #334155;
    color: #94A3B8;
}

.card-bookmark-btn:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    transform: scale(1.1);
}

.card-bookmark-btn.saved {
    background: var(--color-accent);
    color: #FFFFFF;
    border-color: var(--color-accent);
}

.card-bookmark-btn.saved .icon-bookmark {
    fill: currentColor;
}

.card-body {
    padding: 1.35rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    flex: 1;
}

.card-title {
    font-size: 1.1875rem;
    font-weight: 800;
    margin: 0 0 0.5rem;
    line-height: 1.35;
    text-align: center;
}

.card-title a {
    color: var(--color-text);
    text-decoration: none;
    transition: color 0.15s ease;
}

[data-theme="dark"] .card-title a {
    color: #FFFFFF;
}

.card-title a:hover {
    color: var(--color-accent);
}

.card-subtitle {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    margin-bottom: 0.75rem;
    line-height: 1.4;
    text-align: center;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

[data-theme="dark"] .card-subtitle {
    color: #A3A3A3;
}

.card-excerpt {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0.875rem;
    line-height: 1.5;
    text-align: center;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

[data-theme="dark"] .card-excerpt {
    color: #A3A3A3;
}

.card-footer {
    margin-top: auto;
    width: 100%;
    padding: 0.5rem 0.85rem;
    background: var(--color-surface);
    border-radius: 8px;
    border-top: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-align: center;
}

[data-theme="dark"] .card-footer {
    background: #1E1E1E;
    color: #A3A3A3;
}

.card-author-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
}

.avatar-img {
    border-radius: 50%;
    object-fit: cover;
    border: 1.5px solid rgba(255, 255, 255, 0.5);
    flex-shrink: 0;
}

.author-avatar-img {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--color-accent);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.avatar-xs {
    width: 26px;
    height: 26px;
    font-size: 0.7rem;
}

.avatar-sm {
    width: 32px;
    height: 32px;
}

.card-author-name {
    font-weight: 600;
    color: var(--color-text);
}

.card-time-info {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.card-read-time {
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
}

.icon-clock {
    color: var(--color-text-secondary);
}

/* ─── Sidebar ──────────────────────────────────────────────────── */
.sidebar-section {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--color-border);
}

.sidebar-section:last-child {
    border-bottom: none;
}

.sidebar-heading {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #FFFFFF;
    margin-bottom: 1rem;
    font-weight: 800;
}

.trending-list {
    list-style: none;
    padding: 0;
    margin: 0;
    counter-reset: trending;
}

.trending-item {
    display: flex;
    gap: 0.75rem;
    padding: 0.625rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    align-items: flex-start;
}

.trending-item:last-child { border-bottom: none; }

.trending-rank {
    font-size: 1.5rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.4);
    line-height: 1;
    min-width: 24px;
}

.trending-title {
    font-size: 0.875rem;
    font-weight: 700;
    color: #FFFFFF;
    line-height: 1.35;
}

.trending-title:hover {
    color: rgba(255, 255, 255, 0.8);
}

.trending-meta {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.7);
}

.category-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.category-list li a {
    display: block;
    padding: 0.375rem 0;
    color: rgba(255, 255, 255, 0.88);
    font-size: 0.875rem;
}

.category-list li a:hover {
    color: #FFFFFF;
    text-decoration: none;
}

.recent-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.recent-list li a {
    display: block;
    padding: 0.375rem 0;
    color: rgba(255, 255, 255, 0.88);
    font-size: 0.875rem;
    text-decoration: none;
}

.recent-list li a:hover {
    color: #FFFFFF;
    text-decoration: none;
}

.recent-list li:last-child a { border-bottom: none; }

/* ─── Article Detail ───────────────────────────────────────────── */
.article-header {
    padding-top: 0 !important;
    margin-top: 0.25rem !important;
    margin-bottom: 2rem;
}

.article-categories {
    margin-bottom: 1rem;
}

.article-category {
    display: inline-block;
    font-size: 0.8125rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-accent);
    margin-right: 0.75rem;
    padding: 0.25rem 0.75rem;
    border: 1px solid var(--color-accent);
    border-radius: 100px;
    transition: all 0.15s;
}

.article-category:hover {
    background: var(--color-accent);
    color: #fff;
    text-decoration: none;
}

.article-title {
    font-size: 2.5rem;
    line-height: 1.2;
    margin-bottom: 0.75rem;
    text-align: center;
    border-left: none !important;
}

.article-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin-bottom: 1.5rem;
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.25rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
    padding: 0.75rem 1.25rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-sizing: border-box;
    width: 100%;
}

.article-meta-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-left: auto;
    flex-shrink: 0;
}

.article-author {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.avatar-initials {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: 50%;
    font-weight: 700;
    font-size: 0.875rem;
    color: var(--color-accent);
}

.avatar-sm {
    width: 40px;
    height: 40px;
    font-size: 0.8125rem;
}

.author-name {
    font-weight: 600;
    color: var(--color-text);
    font-size: 0.9375rem;
}

.article-date-reading {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    margin-top: 0.125rem;
}

/* Reading list button */
.btn-reading-list {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 0.875rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    transition: all 0.15s;
    min-height: 40px;
    flex-shrink: 0;
    margin-left: auto;
}

.btn-reading-list:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.btn-reading-list.saved {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}

.btn-reading-list.saved .icon-bookmark {
    fill: currentColor;
}

/* ─── Social Media Share Bar ──────────────────────────────────── */
.social-share-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.social-share-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
}

.social-share-buttons {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.social-share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    cursor: pointer;
    text-decoration: none !important;
}

.social-share-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.social-share-btn.share-x:hover { background: #000000; color: #FFFFFF; border-color: #000000; }
.social-share-btn.share-linkedin:hover { background: #0A66C2; color: #FFFFFF; border-color: #0A66C2; }
.social-share-btn.share-facebook:hover { background: #1877F2; color: #FFFFFF; border-color: #1877F2; }
.social-share-btn.share-reddit:hover { background: #FF4500; color: #FFFFFF; border-color: #FF4500; }
.social-share-btn.share-whatsapp:hover { background: #25D366; color: #FFFFFF; border-color: #25D366; }
.social-share-btn.share-copy:hover { background: var(--color-accent); color: #FFFFFF; border-color: var(--color-accent); }

.copy-toast {
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    background: #0F172A;
    color: #FFFFFF;
    font-size: 0.6875rem;
    font-weight: 700;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    white-space: nowrap;
    pointer-events: none;
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}

.article-bottom-share {
    margin-top: 1.5rem;
    margin-bottom: 2rem;
    padding: 1rem 1.25rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-sizing: border-box;
    width: 100%;
}

/* Hero image */
.article-hero {
    margin: 2rem auto;
    max-width: var(--max-width);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.article-hero img {
    width: 100%;
    height: auto;
}

/* Article body typography */
.article-body {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--color-text);
}

.article-body h2 {
    font-size: 1.5rem;
    margin-top: 2.5rem;
    padding-top: 1rem;
}

.article-body h3 {
    font-size: 1.25rem;
    margin-top: 2rem;
}

.article-body img {
    border-radius: var(--radius-md);
    margin: 1.5rem 0;
}

.article-body a {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.article-body a:hover {
    color: var(--color-accent-hover);
}

/* TOC permalink */
.toc-anchor {
    margin-left: 0.5rem;
    color: var(--color-border);
    text-decoration: none;
    font-size: 0.875em;
    opacity: 0;
    transition: opacity 0.15s;
}

h2:hover .toc-anchor,
h3:hover .toc-anchor {
    opacity: 1;
}

.toc-anchor:hover {
    color: var(--color-accent);
}

/* Tags */
.article-tags {
    margin-top: 2.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.tag-chip {
    display: inline-block;
    padding: 0.35rem 0.875rem;
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    transition: all 0.15s;
}

.tag-chip:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    text-decoration: none;
}

/* Author box */
.author-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.75rem;
    padding: 1.75rem 1.5rem;
    margin-top: 3rem;
    margin-bottom: 2rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}

.author-avatar {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 0.25rem;
    flex-shrink: 0;
}

.author-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    width: 100%;
    max-width: 680px;
    margin: 0 auto;
}

.author-name {
    font-size: 1.125rem;
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 0.5rem;
    text-align: center;
    width: 100%;
}

.author-bio {
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--color-text-secondary);
    text-align: center;
    margin: 0 auto;
    width: 100%;
}

.resume-prompt {
    position: fixed;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    border-radius: var(--radius-md);
    padding: 0.75rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    z-index: 500;
    font-size: 0.875rem;
    max-width: 90vw;
}

.resume-prompt[hidden],
.resume-prompt.is-hidden {
    display: none !important;
}

.resume-prompt p { margin: 0; }

.resume-prompt a {
    font-weight: 600;
}

.resume-dismiss {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--color-text-secondary);
    padding: 0.25rem;
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 501;
    pointer-events: auto !important;
}

.resume-dismiss:hover {
    color: var(--color-text-primary);
}

/* ─── Article Navigation ──────────────────────────────────────── */
.article-nav {
    display: flex;
    justify-content: space-between;
    gap: 2rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
}

.nav-link {
    display: block;
    padding: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    max-width: 48%;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.nav-link:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-sm);
    text-decoration: none;
}

.nav-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    margin-bottom: 0.25rem;
}

.nav-title {
    display: block;
    font-weight: 600;
    color: var(--color-text);
    font-size: 0.9375rem;
}

.nav-next {
    text-align: right;
    margin-left: auto;
}

/* ─── Related Articles ─────────────────────────────────────────── */
.related-articles {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
}

/* ─── Article Detail Title & Header Styling ────────────────────── */
.content-narrow {
    max-width: 960px !important;
    margin-left: auto !important;
    margin-right: auto !important;
}

.article-header {
    margin-top: 0.25rem !important;
    padding-top: 0 !important;
    margin-bottom: 2rem;
    text-align: center;
    width: 100%;
}

.article-header .content-narrow {
    max-width: 1080px !important;
    margin: 0 auto;
    text-align: center;
}

.article-title {
    font-family: var(--font-heading), 'Inter', system-ui, -apple-system, sans-serif !important;
    font-size: clamp(2.25rem, 4.5vw, 3.5rem) !important;
    font-weight: 900 !important;
    line-height: 1.15 !important;
    letter-spacing: -0.025em !important;
    color: var(--color-text) !important;
    border-left: none !important;
    padding-left: 0 !important;
    text-align: center !important;
    margin-top: 1rem !important;
    margin-bottom: 1.25rem !important;
    width: 100% !important;
}

[data-theme="dark"] .article-title {
    color: #FFFFFF !important;
    border-left: none !important;
}

.article-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin-top: 0.5rem;
    margin-bottom: 1.5rem;
    padding-left: 1.25rem;
}

[data-theme="dark"] .article-subtitle {
    color: #A3A3A3;
}

/* ─── Profile Picture & Author Avatars Pure Circle Styling ───────── */
.author-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.75rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 1.75rem;
    margin-top: 3rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}

[data-theme="dark"] .author-box {
    background: #191919 !important;
    border-color: #2A2A2A !important;
}

/* ─── Dedicated About Me Page (/ahammadmejbah) ───────────────── */
.aboutme-hero-card {
    background: #FFFFFF;
    border: 1px solid var(--color-border);
    border-radius: 20px;
    padding: 2.5rem 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
    margin-bottom: 2.5rem;
}

[data-theme="dark"] .aboutme-hero-card {
    background: #242424;
    border-color: #333333;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.aboutme-hero-inner {
    display: flex;
    align-items: center;
    gap: 2rem;
}

@media (max-width: 680px) {
    .aboutme-hero-inner {
        flex-direction: column;
        text-align: center;
    }
}

.aboutme-avatar-box {
    flex-shrink: 0;
}

.aboutme-avatar-img {
    width: 140px !important;
    height: 140px !important;
    min-width: 140px !important;
    min-height: 140px !important;
    max-width: 140px !important;
    max-height: 140px !important;
    border-radius: 50% !important;
    object-fit: cover !important;
    object-position: center top !important;
    background: #FFFFFF !important;
    padding: 4px !important;
    border: 3px solid #2563EB !important;
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.2) !important;
}

[data-theme="dark"] .aboutme-avatar-img {
    background: #242424 !important;
    border-color: #38BDF8 !important;
    box-shadow: 0 10px 25px rgba(56, 189, 248, 0.25) !important;
}

.aboutme-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(37, 99, 235, 0.08);
    border: 1px solid rgba(37, 99, 235, 0.2);
    border-radius: 100px;
    padding: 0.3rem 0.8rem;
    font-size: 0.725rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    color: #2563EB;
    margin-bottom: 0.75rem;
}

[data-theme="dark"] .aboutme-badge {
    background: rgba(56, 189, 248, 0.12);
    border-color: rgba(56, 189, 248, 0.3);
    color: #38BDF8;
}

.aboutme-name {
    font-size: 2.25rem;
    font-weight: 900;
    color: var(--color-text);
    margin-bottom: 0.4rem;
    line-height: 1.15;
}

[data-theme="dark"] .aboutme-name {
    color: #FFFFFF;
}

.aboutme-title-sub {
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin-bottom: 1.25rem;
    line-height: 1.4;
}

[data-theme="dark"] .aboutme-title-sub {
    color: #A3A3A3;
}

.academic-links-strip {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.academic-link-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.45rem 0.85rem;
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    text-decoration: none;
    transition: border-color 0.2s, background 0.2s;
}

[data-theme="dark"] .academic-link-btn {
    background: #191919;
    border-color: #333333;
    color: #FFFFFF;
}

.academic-link-btn:hover {
    border-color: #2563EB;
    color: #2563EB;
    text-decoration: none;
}

[data-theme="dark"] .academic-link-btn:hover {
    border-color: #38BDF8;
    color: #38BDF8;
}

/* Executive Biography Card */
.aboutme-bio-card {
    background: #FFFFFF;
    border: 1px solid var(--color-border);
    border-radius: 20px;
    padding: 2.25rem 2rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
    margin-bottom: 2.5rem;
}

[data-theme="dark"] .aboutme-bio-card {
    background: #242424;
    border-color: #333333;
}

.section-card-title {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 1.25rem;
}

[data-theme="dark"] .section-card-title {
    color: #FFFFFF;
}

.bio-prose p {
    font-size: 1.05rem;
    color: var(--color-text);
    line-height: 1.7;
    margin-bottom: 1rem;
}

[data-theme="dark"] .bio-prose p {
    color: #E2E8F0;
}

.bio-prose p:last-child {
    margin-bottom: 0;
}

/* Research Grid 4 */
.research-grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

@media (max-width: 900px) {
    .research-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 540px) {
    .research-grid-4 {
        grid-template-columns: 1fr;
    }
}

.research-card {
    background: #FFFFFF;
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}

[data-theme="dark"] .research-card {
    background: #242424;
    border-color: #333333;
}

.research-icon {
    font-size: 1.85rem;
    margin-bottom: 0.75rem;
}

.research-card-title {
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

[data-theme="dark"] .research-card-title {
    color: #FFFFFF;
}

.research-card-desc {
    font-size: 0.84375rem;
    color: var(--color-text-secondary);
    line-height: 1.45;
    margin: 0;
}

[data-theme="dark"] .research-card-desc {
    color: #A3A3A3;
}

.author-avatar {
    width: 68px !important;
    height: 68px !important;
    min-width: 68px !important;
    min-height: 68px !important;
    max-width: 68px !important;
    max-height: 68px !important;
    flex-shrink: 0 !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
}

.author-avatar-img,
.author-avatar img,
.author-box img {
    width: 68px !important;
    height: 68px !important;
    min-width: 68px !important;
    min-height: 68px !important;
    max-width: 68px !important;
    max-height: 68px !important;
    flex-shrink: 0 !important;
    border-radius: 50% !important;
    object-fit: cover !important;
    object-position: center top !important;
    aspect-ratio: 1 / 1 !important;
    background: #FFFFFF !important;
    padding: 2px !important;
    border: 2px solid #E2E8F0 !important;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1) !important;
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.3s ease, border-color 0.3s ease !important;
}

/* Article Byline Compact Avatar */
.article-author img,
.avatar-img,
.avatar-sm,
.profile-pic-sm {
    width: 36px !important;
    height: 36px !important;
    min-width: 36px !important;
    min-height: 36px !important;
    max-width: 36px !important;
    max-height: 36px !important;
    flex-shrink: 0 !important;
    border-radius: 50% !important;
    object-fit: cover !important;
    object-position: center top !important;
    aspect-ratio: 1 / 1 !important;
    background: #FFFFFF !important;
    padding: 1px !important;
    border: 1.5px solid #E2E8F0 !important;
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.08) !important;
}

.author-avatar-img:hover,
.avatar-img:hover,
.article-author img:hover {
    transform: scale(1.06) !important;
    border-color: #2563EB !important;
    box-shadow: 0 12px 28px rgba(37, 99, 235, 0.25) !important;
}

[data-theme="dark"] .author-avatar-img,
[data-theme="dark"] .author-avatar img,
[data-theme="dark"] .avatar-img,
[data-theme="dark"] .article-author img,
[data-theme="dark"] .author-box img {
    background: #242424 !important;
    border-color: #383838 !important;
    box-shadow: 0 8px 22px rgba(0, 0, 0, 0.4) !important;
}

[data-theme="dark"] .author-avatar-img:hover,
[data-theme="dark"] .avatar-img:hover,
[data-theme="dark"] .article-author img:hover {
    border-color: #38BDF8 !important;
    box-shadow: 0 12px 28px rgba(56, 189, 248, 0.3) !important;
}

/* ─── Article Initial Drop Cap Styling ───────────────────────────── */
.article-body > p:first-of-type::first-letter {
    float: left;
    font-family: 'Cinzel', 'Playfair Display', 'Merriweather', 'Georgia', serif;
    font-size: 4rem;
    font-weight: 900;
    line-height: 0.82;
    padding-top: 4px;
    padding-right: 4px;
    padding-bottom: 2px;
    margin-right: 6px;
    color: #FF5500;
    text-transform: uppercase;
}

[data-theme="dark"] .article-body > p:first-of-type::first-letter {
    color: #FF6B00;
}

/* ─── Vibrant Python Code Card & Syntax Highlighting ────────────── */
.highlight,
.article-body > pre:not(.highlight pre) {
    background: #141619 !important;
    border: 1px solid #2A2E33 !important;
    border-radius: 14px !important;
    padding: 1.25rem 1.5rem !important;
    margin: 1.75rem 0 !important;
    overflow-x: auto !important;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25) !important;
    font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace !important;
    font-size: 0.925rem !important;
    line-height: 1.65 !important;
    color: #E6EDF3 !important;
    position: relative !important;
}

/* Reset inner pre inside .highlight so there is NO double nested card */
.highlight pre {
    background: transparent !important;
    border: none !important;
    border-radius: 0 !important;
    padding: 0 !important;
    margin: 0 !important;
    box-shadow: none !important;
    overflow: visible !important;
}

/* Code block terminal dots decoration */
.highlight::before {
    content: "● ● ●  PYTHON CODE";
    display: block;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.725rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    color: #8B949E;
    background: #1C2128;
    margin: -1.25rem -1.5rem 1rem -1.5rem;
    padding: 0.6rem 1.25rem;
    border-bottom: 1px solid #2A2E33;
    border-top-left-radius: 13px;
    border-top-right-radius: 13px;
}

/* Copy Code Button */
.code-copy-btn {
    position: absolute;
    top: 0.45rem;
    right: 0.75rem;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.65rem;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 6px;
    color: #C9D1D9;
    font-family: var(--font-body), system-ui, sans-serif;
    font-size: 0.75rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    z-index: 10;
}

.code-copy-btn:hover {
    background: #2563EB;
    color: #FFFFFF;
    border-color: #2563EB;
}

.code-copy-btn.copied {
    background: #10B981 !important;
    color: #FFFFFF !important;
    border-color: #10B981 !important;
}

.code-copy-btn svg {
    flex-shrink: 0;
}

.article-body code,
.highlight code {
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace !important;
    font-size: 0.9em;
    color: #E6EDF3;
}

/* Inline Code Pill */
.article-body p code,
.article-body li code {
    background: rgba(37, 99, 235, 0.1) !important;
    color: #2563EB !important;
    border: 1px solid rgba(37, 99, 235, 0.2) !important;
    padding: 0.18rem 0.45rem !important;
    border-radius: 6px !important;
    font-size: 0.875em !important;
}

[data-theme="dark"] .article-body p code,
[data-theme="dark"] .article-body li code {
    background: rgba(56, 189, 248, 0.12) !important;
    color: #38BDF8 !important;
    border-color: rgba(56, 189, 248, 0.25) !important;
}

/* Pygments Vibrant Token Colors (Python & Quantum Code) */

/* Keywords (def, class, import, from, return, if, else, for, in, try, except, raise, yield, lambda) */
.highlight .k,
.highlight .kd,
.highlight .kn,
.highlight .kp,
.highlight .kr,
.highlight .kt,
.highlight .ow {
    color: #FF7B72 !important; /* Vibrant Electric Red-Pink */
    font-weight: 700 !important;
}

/* Builtins & Special Identifiers (print, len, range, int, str, self, cls, super, True, False, None) */
.highlight .nb,
.highlight .bp,
.highlight .kc {
    color: #79C0FF !important; /* Vibrant Cyan Blue */
    font-weight: 700 !important;
}

/* Function & Method Names (def qft_circuit(), np.dot(), QuantumCircuit()) */
.highlight .nf,
.highlight .fm {
    color: #D2A8FF !important; /* Vibrant Neon Purple / Violet */
    font-weight: 800 !important;
}

/* Class Names & Types */
.highlight .nc,
.highlight .vc,
.highlight .nn {
    color: #FFA657 !important; /* Bright Gold / Amber */
    font-weight: 800 !important;
}

/* Strings & Characters ('...', "...", f"...", r"...") */
.highlight .s,
.highlight .sa,
.highlight .sb,
.highlight .sc,
.highlight .dl,
.highlight .sd,
.highlight .s2,
.highlight .se,
.highlight .sh,
.highlight .si,
.highlight .sx,
.highlight .sr,
.highlight .s1,
.highlight .ss {
    color: #A5D6FF !important; /* Vibrant Sky Blue-Ice String Color */
}

/* Numbers & Quantities (0, 1, 3.14159, 1e-9, 0x1F) */
.highlight .m,
.highlight .mb,
.highlight .mf,
.highlight .mh,
.highlight .mi,
.highlight .il,
.highlight .mo {
    color: #7EE787 !important; /* Vibrant Neon Emerald Green */
    font-weight: 700 !important;
}

/* Decorators (@staticmethod, @qiskit, @pytest.mark) */
.highlight .nd {
    color: #FFA657 !important; /* Vibrant Amber Gold */
    font-weight: 800 !important;
}

/* Comments (# ... ) */
.highlight .c,
.highlight .ch,
.highlight .cm,
.highlight .c1,
.highlight .cs {
    color: #8B949E !important; /* Soft Slate Grey */
    font-style: italic !important;
}

/* Operators (=, +, -, *, /, @, ==, !=, <=, >=) */
.highlight .o {
    color: #FF7B72 !important; /* Coral Red Operator Accent */
    font-weight: 700 !important;
}

/* Variables & Attributes */
.highlight .n,
.highlight .na,
.highlight .nv {
    color: #E6EDF3 !important; /* Bright White-Grey */
}

/* Punctuation ((), [], {}, :, .) */
.highlight .p {
    color: #8B949E !important;
}

/* ─── Search Page ──────────────────────────────────────────────── */
.search-page-form {
    margin-bottom: 2rem;
}

.search-input-group {
    display: flex;
    gap: 0.5rem;
}

.search-page-input {
    flex: 1;
    padding: 0.875rem 1rem;
    font-family: var(--font-body);
    font-size: 1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    background: var(--color-bg);
    transition: border-color 0.2s;
}

.search-page-input:focus {
    border-color: var(--color-accent);
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 87, 184, 0.12);
}

.search-page-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    background: var(--color-accent);
    color: #fff;
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s;
    min-height: 44px;
}

.search-page-btn:hover {
    background: var(--color-accent-hover);
}

.search-results-info {
    margin-bottom: 1.5rem;
    color: var(--color-text-secondary);
}

.search-result {
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--color-border);
}

.search-result:last-child { border-bottom: none; }

.search-result-title {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.search-result-title a {
    color: var(--color-text);
}

.search-result-title a:hover {
    color: var(--color-accent);
}

.search-result-excerpt {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin-bottom: 0.5rem;
}

/* ─── Archive ──────────────────────────────────────────────────── */
.archive-list {
    list-style: none;
    padding: 0;
}

.archive-item {
    display: flex;
    gap: 1.5rem;
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--color-border);
}

.archive-date {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    min-width: 60px;
    padding-top: 0.125rem;
}

.archive-title {
    font-size: 1.0625rem;
    margin-bottom: 0.25rem;
}

.archive-title a {
    color: var(--color-text);
}

.archive-title a:hover {
    color: var(--color-accent);
}

.archive-excerpt {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: 0.25rem;
}

.archive-meta {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

/* ─── My List / Highlights ─────────────────────────────────────── */
.reading-list-actions,
.highlights-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.btn-clear-list {
    padding: 0.5rem 1rem;
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    transition: all 0.15s;
    min-height: 44px;
}

.btn-clear-list:hover {
    border-color: #DC2626;
    color: #DC2626;
}

.btn-remove-item {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1rem;
    color: var(--color-text-secondary);
    transition: all 0.15s;
    min-width: 44px;
    min-height: 44px;
}

.btn-remove-item:hover {
    border-color: #DC2626;
    color: #DC2626;
}

.highlight-group {
    margin-bottom: 2rem;
}

.highlight-article-title {
    font-size: 1.125rem;
    margin-bottom: 0.75rem;
}

.highlight-quote {
    position: relative;
    padding-right: 2.5rem;
}

.btn-remove-highlight {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-secondary);
    font-size: 1.25rem;
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-remove-highlight:hover { color: #DC2626; }

/* ─── Noscript / Empty States ──────────────────────────────────── */
.noscript-message {
    padding: 2rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    text-align: center;
    color: var(--color-text-secondary);
}

.empty-state {
    padding: 3rem 2rem;
    text-align: center;
    color: var(--color-text-secondary);
}

.btn-primary {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--color-accent);
    color: #fff;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9375rem;
    margin-top: 1rem;
    transition: background 0.15s;
    min-height: 44px;
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    text-decoration: none;
}

/* ─── Pagination ───────────────────────────────────────────────── */
.pagination {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
}

.pagination-list {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.pagination-link {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.5rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--color-text);
    transition: all 0.15s;
    min-height: 44px;
}

.pagination-link:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    text-decoration: none;
}

.pagination-info {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* ─── Breadcrumbs ──────────────────────────────────────────────── */
.breadcrumbs {
    margin-bottom: 1.5rem;
}

.breadcrumbs ol {
    display: flex;
    flex-wrap: wrap;
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.breadcrumbs li:not(:last-child)::after {
    content: '/';
    margin: 0 0.5rem;
    color: var(--color-border);
}

.breadcrumbs a {
    color: var(--color-text-secondary);
}

.breadcrumbs a:hover {
    color: var(--color-accent);
}

/* ─── Footer ───────────────────────────────────────────────────── */
.site-footer {
    margin-top: 3.5rem;
    padding: 1.5rem 0;
    border-top: 1px solid var(--color-border);
    background: var(--color-bg);
    text-align: center;
}

[data-theme="dark"] .site-footer {
    background: #191919 !important;
    border-color: #2A2A2A !important;
}

.footer-bottom {
    padding: 0.5rem 0;
    border-top: none;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    width: 100%;
}

.footer-copyright {
    margin: 0;
    text-align: center;
    width: 100%;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
    line-height: 1.5;
}

[data-theme="dark"] .footer-copyright {
    color: #FFFFFF;
}

.footer-brand {
    font-weight: 700;
    color: #0057B8;
}

[data-theme="dark"] .footer-brand {
    color: #38BDF8;
}

.footer-author {
    font-weight: 700;
    color: var(--color-text);
}

[data-theme="dark"] .footer-author {
    color: #FFFFFF;
}

.footer-note {
    font-style: italic;
    margin-bottom: 0;
}

/* ─── Pygments Light Theme ─────────────────────────────────────── */
.highlight { background: var(--color-surface); }
.highlight .hll { background: #ffffcc; }
.highlight .c { color: #6B7280; font-style: italic; }
.highlight .k { color: #0057B8; font-weight: bold; }
.highlight .o { color: #1A1A1A; }
.highlight .cm { color: #6B7280; font-style: italic; }
.highlight .cp { color: #9333EA; }
.highlight .c1 { color: #6B7280; font-style: italic; }
.highlight .cs { color: #6B7280; font-style: italic; }
.highlight .gd { color: #DC2626; }
.highlight .ge { font-style: italic; }
.highlight .gr { color: #DC2626; }
.highlight .gh { color: #1A1A1A; font-weight: bold; }
.highlight .gi { color: #059669; }
.highlight .go { color: #6B7280; }
.highlight .gp { color: #6B7280; }
.highlight .gs { font-weight: bold; }
.highlight .gu { color: #0057B8; }
.highlight .gt { color: #DC2626; }
.highlight .kc { color: #0057B8; font-weight: bold; }
.highlight .kd { color: #0057B8; font-weight: bold; }
.highlight .kn { color: #0057B8; font-weight: bold; }
.highlight .kp { color: #0057B8; }
.highlight .kr { color: #0057B8; font-weight: bold; }
.highlight .kt { color: #9333EA; }
.highlight .m { color: #D97706; }
.highlight .s { color: #059669; }
.highlight .na { color: #4B5563; }
.highlight .nb { color: #0057B8; }
.highlight .nc { color: #0057B8; font-weight: bold; }
.highlight .no { color: #DC2626; }
.highlight .nd { color: #9333EA; font-weight: bold; }
.highlight .ni { color: #6B7280; }
.highlight .ne { color: #DC2626; font-weight: bold; }
.highlight .nf { color: #0057B8; }
.highlight .nl { color: #4B5563; font-weight: bold; }
.highlight .nn { color: #1A1A1A; }
.highlight .nt { color: #0057B8; font-weight: bold; }
.highlight .nv { color: #4B5563; }
.highlight .ow { color: #0057B8; font-weight: bold; }
.highlight .w { color: #bbbbbb; }
.highlight .mf { color: #D97706; }
.highlight .mh { color: #D97706; }
.highlight .mi { color: #D97706; }
.highlight .mo { color: #D97706; }
.highlight .sb { color: #059669; }
.highlight .sc { color: #059669; }
.highlight .sd { color: #059669; }
.highlight .s2 { color: #059669; }
.highlight .se { color: #D97706; }
.highlight .sh { color: #059669; }
.highlight .si { color: #D97706; }
.highlight .sx { color: #059669; }
.highlight .sr { color: #D97706; }
.highlight .s1 { color: #059669; }
.highlight .ss { color: #059669; }
.highlight .bp { color: #0057B8; }
.highlight .vc { color: #4B5563; }
.highlight .vg { color: #4B5563; }
.highlight .vi { color: #4B5563; }
.highlight .il { color: #D97706; }

/* ─── Text Highlight (user selection) ──────────────────────────── */
.user-highlight {
    background: var(--color-mark);
    cursor: pointer;
}

/* Highlight tooltip */
.highlight-tooltip {
    position: absolute;
    background: var(--color-text);
    color: #fff;
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    font-weight: 600;
    cursor: pointer;
    z-index: 50;
    box-shadow: var(--shadow-md);
    white-space: nowrap;
}

.highlight-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: var(--color-text);
}

/* ─── Ticker Bar ────────────────────────────────────────────────── */
.ticker-bar {
    display: flex;
    align-items: center;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 0.5rem 1rem;
    margin-bottom: 2rem;
    font-size: 0.8125rem;
    overflow: hidden;
    max-width: 100%;
    width: 100%;
}

.ticker-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--color-accent);
    color: #fff;
    font-weight: 700;
    font-size: 0.75rem;
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
    letter-spacing: 0.05em;
    white-space: nowrap;
    margin-right: 1rem;
    flex-shrink: 0;
}

.ticker-pulse {
    width: 6px;
    height: 6px;
    background: #fff;
    border-radius: 50%;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { opacity: 0.4; transform: scale(0.9); }
    50% { opacity: 1; transform: scale(1.3); }
    100% { opacity: 0.4; transform: scale(0.9); }
}

.ticker-content {
    flex: 1 1 0%;
    min-width: 0;
    max-width: 100%;
    overflow: hidden;
    white-space: nowrap;
}

.ticker-scroll {
    display: inline-block;
    animation: ticker-scroll 25s linear infinite;
}

.ticker-scroll:hover {
    animation-play-state: paused;
}

@keyframes ticker-scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.ticker-item {
    color: var(--color-text);
    font-weight: 500;
}

.ticker-divider {
    margin: 0 1rem;
    color: var(--color-accent);
}

/* ─── Header Banner ────────────────────────────────────────────── */
.header-banner,
.page-header {
    background: #FFFFFF;
    border: 1px solid var(--color-border);
    padding: 2.25rem 2rem;
    border-radius: var(--radius-lg);
    margin-bottom: 2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
}

html[data-theme="dark"] .header-banner,
html[data-theme="dark"] .page-header,
[data-theme="dark"] .header-banner,
[data-theme="dark"] .page-header {
    background: #1E293B;
    border-color: #334155;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.badge-category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
}

.badge-accent {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #fff;
    background: var(--color-accent);
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    margin-bottom: 0.5rem;
}

/* ─── Hero Showcase (Top Tier Magazine Layout) ───────────────── */
.hero-showcase {
    margin-bottom: 2.5rem;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr;
    gap: 1.75rem;
    align-items: stretch;
}

.hero-primary-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
}

.hero-primary-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.hero-primary-link {
    display: flex;
    flex-direction: column;
    height: 100%;
    text-decoration: none;
    color: inherit;
}

.hero-primary-link:hover { text-decoration: none; }

.hero-image-wrap {
    position: relative;
    width: 100%;
    height: 320px;
    overflow: hidden;
    background: var(--color-surface);
}

.hero-image-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.hero-primary-card:hover .hero-image-wrap img {
    transform: scale(1.03);
}

.hero-lead-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: var(--color-accent);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 0.3rem 0.75rem;
    border-radius: 4px;
}

.hero-primary-body {
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    flex: 1;
}

.hero-categories {
    margin-bottom: 0.5rem;
    text-align: center;
}

.hero-primary-title {
    font-size: 1.75rem;
    line-height: 1.25;
    margin-bottom: 0.5rem;
    color: var(--color-text);
    text-align: center;
}

.hero-primary-subtitle {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    margin-bottom: 0.75rem;
    line-height: 1.4;
    text-align: center;
}

.hero-primary-excerpt {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin-bottom: 1.25rem;
    text-align: center;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.author-inline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--color-text);
}

/* Secondary Hero Stack */
.hero-secondary-stack {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    text-align: center;
    align-items: center;
}

.hero-stack-heading {
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-accent);
    margin-bottom: 0.25rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-accent);
    display: inline-block;
    text-align: center;
}

.hero-secondary-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: transform 0.15s, box-shadow 0.15s;
    width: 100%;
}

.hero-secondary-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.hero-secondary-link {
    display: flex;
    gap: 1rem;
    padding: 0.875rem;
    text-decoration: none;
    color: inherit;
    align-items: center;
}

.hero-secondary-link:hover { text-decoration: none; }

.hero-secondary-thumb {
    width: 100px;
    height: 75px;
    flex-shrink: 0;
    border-radius: 4px;
    overflow: hidden;
    background: var(--color-surface);
}

.hero-secondary-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-secondary-body {
    flex: 1;
    text-align: left;
}

.hero-secondary-title {
    font-size: 0.9375rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 0.35rem;
    color: var(--color-text);
}

/* ─── Topic Explorer Tabs ──────────────────────────────────────── */
.topic-explorer {
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 0.75rem;
    text-align: center;
}

.topic-explorer-inner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    overflow-x: auto;
    padding-bottom: 0.25rem;
    scrollbar-width: thin;
}

.topic-label {
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--color-text-secondary);
    white-space: nowrap;
    margin-right: 0.5rem;
}

.topic-tab {
    display: inline-block;
    padding: 0.4rem 0.9rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    white-space: nowrap;
    transition: all 0.15s;
    text-decoration: none;
}

.topic-tab:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    transform: translateY(-1px);
    text-decoration: none;
}

.topic-tab.active {
    background: linear-gradient(135deg, #0057B8 0%, #004494 100%);
    color: #FFFFFF;
    border-color: #0057B8;
    box-shadow: 0 4px 12px rgba(0, 87, 184, 0.25);
}

/* ─── Spotlight Section ────────────────────────────────────────── */
.spotlight-section {
    margin-bottom: 2.5rem;
}

.spotlight-card {
    background: linear-gradient(135deg, #FFFFFF 0%, #F9FAFB 100%);
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-md);
    padding: 1.75rem;
    position: relative;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.spotlight-tag {
    display: inline-block;
    background: var(--color-accent);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
    margin-bottom: 0.75rem;
}

.spotlight-title {
    font-size: 1.375rem;
    margin-bottom: 0.5rem;
    text-align: center;
}

.spotlight-title a {
    color: var(--color-text);
    text-decoration: none;
}

.spotlight-title a:hover {
    color: var(--color-accent);
}

.spotlight-excerpt {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin-bottom: 1rem;
    text-align: center;
}

.spotlight-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    width: 100%;
}

.spotlight-btn {
    margin-left: auto;
    font-weight: 700;
    color: var(--color-accent);
    text-decoration: none;
}

.spotlight-btn:hover {
    text-decoration: underline;
}

/* ─── Feed Header & Load More ──────────────────────────────────── */
.feed-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.feed-count {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    font-weight: 600;
}

.load-more-container {
    text-align: center;
    margin: 2.5rem 0;
}

.btn-load-more {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    background: var(--color-surface);
    border: 2px solid var(--color-accent);
    color: var(--color-accent);
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 700;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.15s;
    min-height: 48px;
}

.btn-load-more:hover {
    background: var(--color-accent);
    color: #fff;
}

.btn-load-more:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ─── Sidebar Widgets ─────────────────────────────────────────── */
.sidebar-widget {
    background: #FFFFFF;
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 1.25rem;
    margin-bottom: 1.75rem;
    color: var(--color-text);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

[data-theme="dark"] .sidebar-widget {
    background: #242424;
    border-color: #333333;
    color: #FFFFFF;
}

.sidebar-widget:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.1);
}

.widget-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--color-border);
}

[data-theme="dark"] .widget-header {
    border-bottom-color: #333333;
}

.widget-header .sidebar-heading {
    margin-bottom: 0;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--color-text);
}

[data-theme="dark"] .widget-header .sidebar-heading {
    color: #FFFFFF;
}

.widget-icon {
    color: var(--color-accent);
}

.widget-link {
    font-size: 0.75rem;
    font-weight: 700;
    color: #2563EB;
    text-decoration: none;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 0.2rem 0.55rem;
    transition: background 0.15s, color 0.15s;
}

[data-theme="dark"] .widget-link {
    color: #38BDF8;
    background: #1E293B;
    border-color: #334155;
}

.widget-link:hover {
    text-decoration: none;
    background: var(--color-accent);
    color: #FFFFFF;
}

.trending-rank {
    font-size: 1.25rem;
    font-weight: 700;
    color: #2563EB;
    background: var(--color-surface);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border: 1px solid var(--color-border);
}

[data-theme="dark"] .trending-rank {
    color: #38BDF8;
    background: #1E293B;
    border-color: #334155;
}

.trending-content {
    flex: 1;
}

.trending-content .trending-title {
    color: var(--color-text);
    font-weight: 800;
}

[data-theme="dark"] .trending-content .trending-title {
    color: #FFFFFF;
}

.trending-content .trending-title:hover {
    color: var(--color-accent);
}

.trending-content .trending-meta {
    color: var(--color-text-secondary);
}

[data-theme="dark"] .trending-content .trending-meta {
    color: #A3A3A3;
}

.equation-box {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 1rem;
    text-align: center;
}

[data-theme="dark"] .equation-box {
    background: #1E1E1E;
    border-color: #333333;
}

.equation-name {
    font-weight: 700;
    font-size: 0.875rem;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

[data-theme="dark"] .equation-name {
    color: #FFFFFF;
}

.equation-math {
    margin: 0.75rem 0;
    font-size: 0.95rem;
    overflow-x: auto;
    color: var(--color-text);
}

[data-theme="dark"] .equation-math {
    color: #FFFFFF;
}

.equation-desc {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    margin-bottom: 0;
    line-height: 1.4;
}

[data-theme="dark"] .equation-desc {
    color: #A3A3A3;
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.tag-pill {
    display: inline-block;
    padding: 0.3rem 0.65rem;
    font-size: 0.75rem;
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    text-decoration: none;
    transition: all 0.15s;
}

[data-theme="dark"] .tag-pill {
    color: #E2E8F0;
    background: #1E293B;
    border-color: #334155;
}

.tag-pill:hover {
    color: #FFFFFF;
    background: var(--color-accent);
    border-color: var(--color-accent);
    text-decoration: none;
}

/* Newsletter Card */
.newsletter-card {
    /* Inherits .sidebar-widget */
}

.newsletter-title {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    color: var(--color-text);
    font-weight: 800;
}

[data-theme="dark"] .newsletter-title {
    color: #FFFFFF;
}

.newsletter-desc {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: 1rem;
    line-height: 1.4;
}

[data-theme="dark"] .newsletter-desc {
    color: #A3A3A3;
}

.newsletter-form {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.newsletter-form input {
    padding: 0.65rem 0.875rem;
    font-family: var(--font-body);
    font-size: 0.875rem;
    border: 1px solid var(--color-border);
    border-radius: 10px;
    background: var(--color-surface);
    color: var(--color-text);
}

[data-theme="dark"] .newsletter-form input {
    background: #1E1E1E;
    border-color: #333333;
    color: #FFFFFF;
}

.newsletter-form input::placeholder {
    color: var(--color-text-secondary);
}

.btn-primary-block {
    padding: 0.65rem;
    background: #2563EB;
    color: #FFFFFF;
    border: none;
    border-radius: 10px;
    font-family: var(--font-body);
    font-weight: 800;
    font-size: 0.875rem;
    cursor: pointer;
    transition: background 0.2s;
    min-height: 44px;
}

.btn-primary-block:hover {
    background: #1D4ED8;
}

.newsletter-note {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    margin-top: 0.75rem;
    margin-bottom: 0;
}

/* ─── Dedicated Newsletter Page (/newsletter/) ───────────────── */
.newsletter-page-wrapper {
    max-width: 1100px;
    margin: 2rem auto 4rem auto;
    padding: 0 1.25rem;
}

.newsletter-hero-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.newsletter-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    padding: 0.35rem 0.9rem;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    color: #2563EB;
    margin-bottom: 1.25rem;
}

[data-theme="dark"] .newsletter-badge {
    background: #242424;
    border-color: #333333;
    color: #38BDF8;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: #10B981;
    border-radius: 50%;
    animation: pulse-dot 1.5s infinite;
}

.newsletter-page-title {
    font-size: clamp(2.25rem, 5vw, 3.5rem);
    font-weight: 900;
    color: var(--color-text);
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

[data-theme="dark"] .newsletter-page-title {
    color: #FFFFFF;
}

.newsletter-page-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 720px;
    margin: 0 auto 2.5rem auto;
    line-height: 1.5;
}

[data-theme="dark"] .newsletter-page-subtitle {
    color: #A3A3A3;
}

/* Subscription Form Card */
.newsletter-subscription-box {
    background: #FFFFFF;
    border: 1px solid var(--color-border);
    border-radius: 20px;
    padding: 2.5rem 2rem;
    width: 100%;
    max-width: 780px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
    margin-bottom: 4rem;
}

[data-theme="dark"] .newsletter-subscription-box {
    background: #242424;
    border-color: #333333;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.form-input-group {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

@media (max-width: 640px) {
    .form-input-group {
        flex-direction: column;
    }
}

.newsletter-email-input {
    flex: 1;
    padding: 0.9rem 1.25rem;
    font-family: var(--font-body);
    font-size: 0.95rem;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    background: var(--color-surface);
    color: var(--color-text);
    outline: none;
    transition: border-color 0.2s;
}

[data-theme="dark"] .newsletter-email-input {
    background: #191919;
    border-color: #333333;
    color: #FFFFFF;
}

.newsletter-email-input:focus {
    border-color: #2563EB;
}

[data-theme="dark"] .newsletter-email-input:focus {
    border-color: #38BDF8;
}

.btn-subscribe-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.9rem 1.75rem;
    background: #2563EB;
    color: #FFFFFF;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 800;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: background 0.2s, transform 0.15s;
    white-space: nowrap;
}

.btn-subscribe-primary:hover {
    background: #1D4ED8;
    transform: translateY(-1px);
}

.topic-preferences {
    text-align: left;
    margin-bottom: 1.25rem;
}

.topics-label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--color-text-secondary);
    margin-bottom: 0.75rem;
}

[data-theme="dark"] .topics-label {
    color: #A3A3A3;
}

.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 0.65rem;
}

.topic-chip {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    padding: 0.55rem 0.75rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text);
    cursor: pointer;
    transition: border-color 0.15s;
}

[data-theme="dark"] .topic-chip {
    background: #191919;
    border-color: #333333;
    color: #FFFFFF;
}

.topic-chip input[type="checkbox"] {
    accent-color: #2563EB;
}

.form-guarantee {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    margin-top: 1rem;
}

[data-theme="dark"] .form-guarantee {
    color: #A3A3A3;
}

.subscription-alert {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.25rem;
    border-radius: 12px;
    text-align: left;
    margin-bottom: 1.5rem;
}

.success-alert {
    background: rgba(16, 185, 129, 0.12);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #065F46;
}

[data-theme="dark"] .success-alert {
    background: rgba(16, 185, 129, 0.18);
    border-color: rgba(52, 211, 153, 0.35);
    color: #6EE7B7;
}

.alert-title {
    font-size: 1rem;
    font-weight: 800;
    margin-bottom: 0.25rem;
}

.alert-desc {
    font-size: 0.875rem;
    margin: 0;
}

/* 4-Column Feature Cards */
.newsletter-features-section {
    width: 100%;
    margin-bottom: 4rem;
}

.features-heading {
    font-size: 1.625rem;
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 2rem;
    text-align: center;
}

[data-theme="dark"] .features-heading {
    color: #FFFFFF;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    text-align: left;
}

@media (max-width: 900px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 540px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

.feature-card {
    background: #FFFFFF;
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}

[data-theme="dark"] .feature-card {
    background: #242424;
    border-color: #333333;
}

.feature-number {
    font-size: 1.75rem;
    font-weight: 900;
    color: #2563EB;
    margin-bottom: 0.75rem;
}

[data-theme="dark"] .feature-number {
    color: #38BDF8;
}

.feature-title {
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

[data-theme="dark"] .feature-title {
    color: #FFFFFF;
}

.feature-desc {
    font-size: 0.84375rem;
    color: var(--color-text-secondary);
    line-height: 1.45;
    margin: 0;
}

[data-theme="dark"] .feature-desc {
    color: #A3A3A3;
}

/* Sample Archive Preview Grid */
.newsletter-archive-preview {
    width: 100%;
}

.sample-dispatches-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    text-align: left;
}

@media (max-width: 768px) {
    .sample-dispatches-grid {
        grid-template-columns: 1fr;
    }
}

.sample-dispatch-card {
    background: #FFFFFF;
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
    transition: transform 0.25s, box-shadow 0.25s;
}

[data-theme="dark"] .sample-dispatch-card {
    background: #242424;
    border-color: #333333;
}

.sample-dispatch-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.1);
}

.dispatch-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.dispatch-link:hover { text-decoration: none; }

.dispatch-tag {
    font-size: 0.7rem;
    font-weight: 800;
    color: #2563EB;
    letter-spacing: 0.08em;
    display: block;
    margin-bottom: 0.4rem;
}

[data-theme="dark"] .dispatch-tag {
    color: #38BDF8;
}

.dispatch-title {
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

[data-theme="dark"] .dispatch-title {
    color: #FFFFFF;
}

.dispatch-excerpt {
    font-size: 0.84375rem;
    color: var(--color-text-secondary);
    line-height: 1.45;
    margin-bottom: 1rem;
}

[data-theme="dark"] .dispatch-excerpt {
    color: #A3A3A3;
}

.dispatch-meta {
    font-size: 0.8125rem;
    font-weight: 700;
    color: #2563EB;
}

[data-theme="dark"] .dispatch-meta {
    color: #38BDF8;
}

/* ─── Latest Discoveries 3-Column Hero Grid ───────────────────── */
.discovery-hero-grid {
    display: grid;
    grid-template-columns: 0.95fr 1.5fr 0.9fr;
    gap: 1.75rem;
    align-items: start;
    margin-bottom: 2rem;
    width: 100%;
    max-width: 1240px;
}

.discovery-secondary-stack {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Most Popular Sidebar Column */
.discovery-popular-stack {
    background: #FFFFFF;
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 1.25rem;
    color: var(--color-text);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

[data-theme="dark"] .discovery-popular-stack {
    background: #242424;
    border-color: #333333;
    color: #FFFFFF;
}

.discovery-popular-stack:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.1);
}

.discovery-popular-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.6rem;
    border-bottom: 1px solid var(--color-border);
}

[data-theme="dark"] .discovery-popular-header {
    border-bottom-color: #333333;
}

.discovery-popular-heading {
    font-size: 1rem;
    font-weight: 800;
    color: var(--color-text);
    margin: 0;
}

[data-theme="dark"] .discovery-popular-heading {
    color: #FFFFFF;
}

.discovery-popular-link {
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    color: #2563EB;
    text-decoration: none;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 0.2rem 0.55rem;
    transition: background 0.15s, color 0.15s;
}

[data-theme="dark"] .discovery-popular-link {
    color: #38BDF8;
    background: #1E293B;
    border-color: #334155;
}

.discovery-popular-link:hover {
    background: var(--color-accent);
    color: #FFFFFF;
    text-decoration: none;
}

.discovery-popular-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.discovery-popular-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 0;
    border-bottom: 1px solid var(--color-border);
    text-decoration: none;
    transition: background 0.15s;
}

[data-theme="dark"] .discovery-popular-item {
    border-bottom-color: #333333;
}

.discovery-popular-item:last-child {
    border-bottom: none;
}

.discovery-popular-item:hover {
    text-decoration: none;
}

.discovery-popular-text {
    flex: 1;
    min-width: 0;
}

.discovery-popular-title {
    font-size: 0.84375rem;
    font-weight: 700;
    color: var(--color-text);
    margin: 0 0 0.2rem;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

[data-theme="dark"] .discovery-popular-title {
    color: #FFFFFF;
}

.discovery-popular-item:hover .discovery-popular-title {
    color: rgba(255, 255, 255, 0.85);
}

.discovery-popular-meta {
    font-size: 0.6875rem;
    color: rgba(255, 255, 255, 0.6);
    font-weight: 600;
    letter-spacing: 0.02em;
}

.discovery-popular-thumb {
    width: 64px;
    height: 64px;
    border-radius: 10px;
    overflow: hidden;
    flex-shrink: 0;
    border: 1px solid rgba(255, 255, 255, 0.25);
}

.discovery-popular-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.secondary-excerpt {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.88);
    line-height: 1.4;
    margin-bottom: 0.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ─── Platform Knowledge Metrics Banner ────────────────────────── */
.stats-banner {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.25rem 1.5rem;
    margin-bottom: 2.5rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    text-align: center;
}

.stat-item {
    padding: 0.5rem;
    border-right: 1px solid var(--color-border);
}

.stat-item:last-child {
    border-right: none;
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
}

/* ─── Sorting Toolbar & Feed Header (Centered) ──────────────────── */
.feed-toolbar {
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
    text-align: left;
    margin-bottom: 1.5rem;
    width: 100%;
}

.feed-toolbar .section-heading {
    margin-bottom: 0;
    text-align: left;
}

.feed-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    margin-bottom: 1.5rem;
    gap: 0.35rem;
    width: 100%;
}

.sort-options {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    flex-wrap: wrap;
    width: 100%;
}

.sort-label {
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--color-text-secondary);
    margin-right: 0.25rem;
}

.sort-tab {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: all 0.15s;
}

.sort-tab:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    text-decoration: none;
}

.sort-tab.active {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}

/* ─── Quantum Timeline Section (Multi-Row Centered Grid, No Scroll) ── */
.timeline-section {
    margin-top: 3.5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
    text-align: center;
    width: 100%;
}

.timeline-container {
    width: 100%;
    margin: 0 auto;
}

.timeline-scroll {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
    width: 100%;
    justify-content: center;
    justify-items: center;
    align-items: stretch;
}

.timeline-item {
    background: #FFFFFF;
    border: 2px solid #3B82F6;
    border-radius: 16px;
    padding: 1.25rem;
    width: 100%;
    position: relative;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

[data-theme="dark"] .timeline-item {
    background: #191919;
    border-color: #38BDF8;
    color: #FFFFFF;
}

.timeline-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(59, 130, 246, 0.22);
    border-color: #2563EB;
}

.timeline-year {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    color: #2563EB;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 0.25rem 0.65rem;
    margin-bottom: 0.75rem;
    text-align: center;
}

[data-theme="dark"] .timeline-year {
    color: #38BDF8;
    background: #1E293B;
    border-color: #334155;
}

.timeline-title {
    font-size: 0.9375rem;
    font-weight: 800;
    margin-bottom: 0.35rem;
    color: var(--color-text);
    text-align: center;
}

[data-theme="dark"] .timeline-title {
    color: #FFFFFF;
}

.timeline-desc {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    margin-bottom: 0;
    line-height: 1.4;
    text-align: center;
}

[data-theme="dark"] .timeline-desc {
    color: #A3A3A3;
}

/* ─── Quantum Concept Glossary (100% Centered) ─────────────────── */
.glossary-section {
    margin-top: 3.5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
    text-align: center;
    width: 100%;
}

.glossary-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    justify-content: center;
    justify-items: center;
}

.glossary-card {
    background: #FFFFFF;
    border: 2px solid #3B82F6;
    border-radius: 16px;
    padding: 1.25rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    color: var(--color-text);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

[data-theme="dark"] .glossary-card {
    background: #191919;
    border-color: #38BDF8;
    color: #FFFFFF;
}

.glossary-card:hover {
    transform: translateY(-5px);
    border-color: #2563EB;
    box-shadow: 0 20px 40px rgba(59, 130, 246, 0.22);
}

.glossary-term {
    font-size: 1rem;
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 0.4rem;
}

[data-theme="dark"] .glossary-term {
    color: #FFFFFF;
}

.glossary-def {
    font-size: 0.84375rem;
    color: var(--color-text-secondary);
    margin-bottom: 0;
    line-height: 1.45;
}

[data-theme="dark"] .glossary-def {
    color: #A3A3A3;
}

/* ══════════════════════════════════════════════════════════════
   DEVICE AUTOLAYOUT RESPONSIVE DESIGN SYSTEM
   Ultra-wide, Desktop, Laptop, Tablet, Mobile (Portrait & Landscape)
   ══════════════════════════════════════════════════════════════ */

/* ─── Tier 1: Large Desktops & Ultra-wides (>= 1280px) ─────────── */
@media (min-width: 1280px) {
    .container {
        max-width: 1280px;
        margin-left: auto;
        margin-right: auto;
    }

    .main-grid {
        max-width: 1240px;
        margin: 0 auto;
    }

    .sidebar {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ─── Tier 2: Standard Laptops & Desktops (1025px - 1279px) ────── */
@media (max-width: 1279px) and (min-width: 1025px) {
    .container {
        max-width: 1040px;
        padding-left: 1.5rem;
        padding-right: 1.5rem;
        margin-left: auto;
        margin-right: auto;
    }

    .main-grid {
        max-width: 1000px;
        margin: 0 auto;
    }

    .sidebar {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero-grid {
        grid-template-columns: 1.4fr 1fr;
        gap: 1.25rem;
    }
}

/* ─── Tier 3: Tablets & Large Mobile / Foldables (769px - 1024px) ─ */
@media (max-width: 1024px) {
    .container {
        padding-left: 1.25rem;
        padding-right: 1.25rem;
    }

    .main-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .hero-image-wrap {
        height: 280px;
    }

    .sidebar {
        order: 2;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .sidebar-widget {
        margin-bottom: 0;
    }

    .articles-grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .glossary-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .timeline-scroll {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ─── Tier 4: Mobiles & Phablets (481px - 768px) ────────────────── */
@media (max-width: 768px) {
    html {
        font-size: 93.75%; /* 15px base for comfortable mobile reading */
    }

    h1 {
        font-size: clamp(1.625rem, 5vw, 2.25rem);
    }

    .page-title, .article-title {
        font-size: clamp(1.625rem, 5vw, 2.25rem);
    }

    .nav-list {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .header-inner {
        height: 58px;
    }

    .hero-image-wrap {
        height: 240px;
    }

    .hero-primary-title {
        font-size: 1.4rem;
    }

    .articles-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    .articles-grid-3 {
        grid-template-columns: 1fr;
    }

    .sidebar {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }

    .stat-item:nth-child(2) {
        border-right: none;
    }

    .stat-value {
        font-size: 1.25rem;
    }

    .feed-toolbar {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .sort-options {
        width: 100%;
        overflow-x: auto;
        padding-bottom: 0.35rem;
        -webkit-overflow-scrolling: touch;
    }

    .glossary-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }

    .article-nav {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-link {
        max-width: 100%;
    }

    .article-meta {
        flex-direction: column;
        align-items: stretch;
        gap: 0.875rem;
        padding: 0.875rem 1rem;
    }

    .article-author {
        width: 100%;
    }

    .article-meta-actions {
        width: 100%;
        margin-left: 0 !important;
        justify-content: space-between;
        padding-top: 0.75rem;
        border-top: 1px solid var(--color-border);
    }

    .article-meta .social-share-wrapper {
        flex: 1;
        min-width: 0;
        gap: 0.4rem;
    }

    .article-meta .social-share-label {
        display: none !important;
    }

    .article-meta .social-share-buttons {
        gap: 0.35rem;
        flex-wrap: nowrap;
    }

    .article-meta .social-share-btn {
        width: 32px;
        height: 32px;
        flex-shrink: 0;
    }

    .article-meta .btn-reading-list {
        padding: 0.35rem 0.75rem !important;
        font-size: 0.8125rem !important;
        height: 32px;
        flex-shrink: 0;
    }

    .content-narrow {
        padding-left: 1rem !important;
        padding-right: 1rem !important;
        box-sizing: border-box !important;
        width: 100% !important;
    }

    .article-title {
        font-size: clamp(1.75rem, 5.5vw, 2.5rem) !important;
        line-height: 1.2 !important;
    }

    .article-subtitle {
        font-size: clamp(0.95rem, 3.2vw, 1.15rem) !important;
    }

    .author-box {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 1.25rem 1rem;
        gap: 1rem;
    }

    .article-bottom-share {
        padding: 0.875rem 1rem;
    }

    .article-bottom-share .social-share-wrapper {
        justify-content: center;
        width: 100%;
    }

    .article-nav .nav-link {
        max-width: 100% !important;
        width: 100% !important;
    }

    .article-body img,
    .article-body iframe,
    .article-body video {
        max-width: 100% !important;
        height: auto !important;
    }

    .article-body pre,
    .article-body table {
        max-width: 100% !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch;
    }
}

/* ─── Tier 5: Small Mobiles & Compact Displays (<= 480px) ──────── */
@media (max-width: 480px) {
    .container {
        padding-left: 0.875rem;
        padding-right: 0.875rem;
    }

    .site-logo {
        font-size: 1.1rem;
    }

    .search-form input {
        width: 130px;
    }

    .search-form input:focus {
        width: 170px;
    }

    .ticker-bar {
        padding: 0.4rem 0.75rem;
    }

    .ticker-badge {
        font-size: 0.7rem;
        padding: 0.2rem 0.5rem;
        margin-right: 0.5rem;
    }

    .hero-primary-body {
        padding: 1.25rem;
    }

    .hero-image-wrap,
    .card-image-box {
        height: 180px;
    }

    .card-body {
        padding: 1.1rem;
    }

    .card-footer {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .stat-item {
        border-right: none;
        border-bottom: 1px solid var(--color-border);
        padding: 0.625rem 0;
    }

    .stat-item:last-child {
        border-bottom: none;
    }

    .spotlight-card {
        padding: 1.25rem;
    }

    .search-input-group {
        flex-direction: column;
    }

    .author-box {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }

    .archive-item {
        flex-direction: column;
        gap: 0.5rem;
    }

    .btn-load-more {
        width: 100%;
        justify-content: center;
    }
}

/* ─── Universal Auto-Layout & Responsive Enhancements ─────────── */
.pipeline-stepper-container {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 0.85rem 1.15rem;
    margin-bottom: 1.5rem;
}

.pipeline-stepper-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    font-size: 0.78125rem;
    margin-bottom: 0.6rem;
}

.stepper-tag {
    font-weight: 800;
    letter-spacing: 0.08em;
    color: var(--color-accent);
}

.stepper-stage {
    color: var(--color-text-secondary);
}

.pipeline-stepper-bar {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    width: 100%;
}

.stepper-segment {
    flex: 1;
    height: 6px;
    background: var(--color-border);
    border-radius: 3px;
    position: relative;
    transition: background 0.2s ease, transform 0.2s ease;
}

.stepper-segment.completed {
    background: #10B981;
}

.stepper-segment.active {
    background: var(--color-accent);
    transform: scaleY(1.3);
}

/* Touch-friendly Tables & Embeds */
table, .table, .data-table, .responsive-table-wrap {
    max-width: 100%;
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

pre, code, .code-block, .highlight {
    max-width: 100%;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-word;
}

canvas, video, iframe, embed, object {
    max-width: 100% !important;
}

@media (max-width: 768px) {
    .dna-graph-row {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }

    .dna-connector {
        justify-content: center;
        transform: rotate(90deg);
        margin: 0.15rem 0;
    }

    .issue-inner {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 0.35rem;
    }

    .pipeline-stepper-label {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* ─── Responsive 3D Quantum Fan Hero Showcase & Hero Grid ─────────── */
@media (max-width: 1024px) {
    .academic-hero-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

@media (max-width: 900px) {
    .quantum-fan-hero {
        padding: 2rem 1.25rem;
    }

    .fan-stack {
        min-height: 380px;
        perspective: 800px;
    }

    .fan-card-1, .fan-card-4 {
        display: none !important;
    }

    .fan-card-2 {
        transform: translateX(-115px) rotate(-6deg) scale(0.92);
        z-index: 5;
    }

    .fan-card-3 {
        transform: translateX(115px) rotate(6deg) scale(0.92);
        z-index: 5;
    }

    .fan-stack:hover .fan-card-2 { transform: translateX(-130px) rotate(-7deg) scale(0.94); }
    .fan-stack:hover .fan-card-3 { transform: translateX(130px) rotate(7deg) scale(0.94); }
}

@media (max-width: 768px) {
    .nav-strip-inner {
        flex-wrap: nowrap !important;
        justify-content: space-between !important;
        gap: 0.4rem !important;
    }

    .academic-header-actions {
        gap: 0.4rem !important;
        flex-shrink: 1 !important;
    }

    .academic-search-form input {
        width: clamp(100px, 30vw, 150px) !important;
        font-size: 0.8125rem !important;
        padding-right: 0.5rem !important;
    }

    .academic-search-form input:focus {
        width: clamp(120px, 36vw, 180px) !important;
    }

    .quantum-fan-hero {
        padding: 1.5rem 0.75rem 2rem 0.75rem;
        margin-bottom: 2rem;
    }

    .fan-container {
        margin-bottom: 1.5rem;
        padding-top: 0;
    }

    .fan-stack {
        min-height: auto;
        height: auto;
        display: flex;
        justify-content: center;
        align-items: center;
    }

    /* Hide background cards on mobile so ONLY the featured green cover shows cleanly */
    .fan-card {
        display: none !important;
    }

    .fan-book-cover {
        position: relative;
        width: 100%;
        max-width: 320px;
        height: auto;
        min-height: 360px;
        margin: 0 auto;
        transform: none !important;
        box-shadow: 0 16px 36px -6px rgba(4, 120, 87, 0.4);
    }

    .book-title {
        font-size: 1.25rem;
        line-height: 1.25;
    }

    .book-subtitle {
        font-size: 0.78125rem;
    }

    .fan-hero-headline {
        font-size: clamp(1.35rem, 5vw, 1.85rem);
    }

    .fan-hero-subtext {
        font-size: 0.9375rem;
        margin-bottom: 1.25rem;
    }
}

/* ─── Discovery 3-Column Hero Layout & Feed Toolbar (Homepage) ──── */
.discovery-hero-grid {
    display: grid;
    grid-template-columns: 1fr 1.4fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
    align-items: start;
    width: 100%;
}

.discovery-secondary-stack {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    width: 100%;
}

.academic-secondary-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    width: 100%;
}

.academic-secondary-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.secondary-card-link {
    text-decoration: none;
    color: var(--color-text);
    display: block;
}

.secondary-title {
    font-size: 0.9375rem;
    font-weight: 800;
    line-height: 1.3;
    color: var(--color-text);
    margin-bottom: 0.35rem;
}

.secondary-excerpt {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    line-height: 1.4;
    margin-bottom: 0.5rem;
}

.secondary-byline {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.discovery-popular-stack {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.15rem;
    width: 100%;
}

.discovery-popular-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 0.6rem;
    border-bottom: 2px solid var(--color-accent);
    margin-bottom: 0.85rem;
}

.discovery-popular-heading {
    font-size: 0.875rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text);
    margin: 0;
}

.discovery-popular-link {
    font-size: 0.6875rem;
    font-weight: 800;
    color: var(--color-accent);
    text-decoration: none;
    letter-spacing: 0.05em;
}

.discovery-popular-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.discovery-popular-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--color-text);
    padding-bottom: 0.65rem;
    border-bottom: 1px dashed var(--color-border);
}

.discovery-popular-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.discovery-popular-title {
    font-size: 0.8125rem;
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-text);
    margin-bottom: 0.2rem;
}

.discovery-popular-meta {
    font-size: 0.6875rem;
    color: var(--color-text-secondary);
}

.discovery-popular-thumb img {
    width: 48px;
    height: 48px;
    object-fit: cover;
    border-radius: 6px;
}

/* Discovery Hero & Sort Toolbar Mobile Breakpoints */
@media (max-width: 1024px) {
    .discovery-hero-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .sort-options {
        flex-wrap: nowrap !important;
        overflow-x: auto !important;
        justify-content: flex-start !important;
        padding-bottom: 0.35rem !important;
        -webkit-overflow-scrolling: touch;
        width: 100% !important;
    }

    .sort-tab {
        white-space: nowrap !important;
        flex-shrink: 0 !important;
    }

    .feed-toolbar {
        align-items: flex-start !important;
        text-align: left !important;
        margin-bottom: 1.5rem !important;
    }

    .feed-toolbar .section-heading {
        text-align: left !important;
    }
}

/* ─── Print Styles ─────────────────────────────────────────────── */
@media print {
    .site-header, .site-footer, .reading-progress,
    .btn-reading-list, .font-toggle, .menu-toggle,
    .article-nav, .related-articles, .sidebar,
    .resume-prompt, .pagination, .ticker-bar,
    .load-more-container, .sort-options { display: none !important; }

    body { font-size: 12pt; line-height: 1.6; color: #000; background: #fff; }

    a { color: #000; text-decoration: underline; }

    .article-hero img { max-height: 300px; }
}

/* ─── Local Storage Alchemy: Pathway, Stats, Commonplace, QR Sync ───── */
.pathway-container,
.commonplace-container,
.sync-container {
    padding-top: 2.5rem;
    padding-bottom: 4rem;
}

.pathway-hero,
.commonplace-header,
.sync-header {
    text-align: center;
    margin-bottom: 3rem;
}

.hero-badge,
.header-pre-title {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--color-primary, #D97706);
    background: rgba(217, 119, 6, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    margin-bottom: 0.75rem;
}

.pathway-title,
.sync-header .page-title,
.commonplace-header .page-title {
    font-size: 2.25rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 0.75rem;
}

.pathway-subtitle,
.sync-header .page-description,
.commonplace-header .page-description {
    font-size: 1.0625rem;
    color: var(--color-text-secondary, #64748B);
    max-width: 680px;
    margin: 0 auto;
}

/* ── Observer Score Dashboard ── */
.observer-score-dashboard {
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 1fr);
    gap: 1.25rem;
    margin-bottom: 2.5rem;
}

@media (max-width: 900px) {
    .observer-score-dashboard {
        grid-template-columns: 1fr 1fr;
    }
}
@media (max-width: 600px) {
    .observer-score-dashboard {
        grid-template-columns: 1fr;
    }
}

.score-card {
    background: var(--color-card-bg, #FFFFFF);
    border: 1px solid var(--color-border, #E2E8F0);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.03);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

[data-theme="dark"] .score-card {
    background: #1E293B;
    border-color: #334155;
}

.main-score {
    background: linear-gradient(135deg, #1E293B 0%, #0F172A 100%);
    color: #FFFFFF;
    border: 1px solid #334155;
    position: relative;
    overflow: hidden;
}

.score-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.score-label {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: #94A3B8;
}

.score-rank-badge {
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.2rem 0.6rem;
    border-radius: 6px;
    background: rgba(245, 158, 11, 0.2);
    color: #F59E0B;
    border: 1px solid rgba(245, 158, 11, 0.4);
}

.score-value-row {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.score-number {
    font-size: 2.75rem;
    font-weight: 900;
    color: #F59E0B;
    line-height: 1;
}

.score-max {
    font-size: 1.125rem;
    color: #64748B;
}

.score-progress-bar {
    height: 8px;
    background: #334155;
    border-radius: 9999px;
    overflow: hidden;
    margin-bottom: 0.75rem;
}

.score-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #F59E0B, #10B981);
    border-radius: 9999px;
    transition: width 0.6s ease;
}

.score-hint {
    font-size: 0.8125rem;
    color: #94A3B8;
    margin: 0;
}

.metric-card {
    align-items: flex-start;
}

.metric-icon {
    color: #38BDF8;
    margin-bottom: 0.75rem;
}

.metric-data {
    display: flex;
    flex-direction: column;
}

.metric-num {
    font-size: 1.75rem;
    font-weight: 800;
    line-height: 1.1;
}

.metric-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-secondary, #64748B);
}

.metric-sub {
    font-size: 0.75rem;
    color: var(--color-text-secondary, #94A3B8);
    margin-top: 0.5rem;
}

/* ── Mentor Guidance Card ── */
.mentor-section {
    margin-bottom: 2.5rem;
}

.mentor-card {
    background: linear-gradient(135deg, rgba(2, 132, 199, 0.08) 0%, rgba(16, 185, 129, 0.08) 100%);
    border: 1px solid rgba(2, 132, 199, 0.2);
    border-radius: 16px;
    padding: 1.5rem 2rem;
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.mentor-avatar {
    position: relative;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: #0284C7;
    color: #FFFFFF;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.mentor-pulse {
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    border: 2px solid #0284C7;
    animation: mentorPulse 2s infinite;
}

@keyframes mentorPulse {
    0% { transform: scale(0.95); opacity: 0.8; }
    50% { transform: scale(1.15); opacity: 0; }
    100% { transform: scale(0.95); opacity: 0.8; }
}

.mentor-content { flex: 1; }

.mentor-tag {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: #0284C7;
    margin-bottom: 0.25rem;
}

.mentor-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.35rem;
}

.mentor-reason {
    font-size: 0.9375rem;
    color: var(--color-text-secondary, #475569);
    margin-bottom: 1rem;
}

.btn-mentor {
    display: inline-flex;
    align-items: center;
    padding: 0.6rem 1.25rem;
    background: #0284C7;
    color: #FFFFFF;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.875rem;
    text-decoration: none;
    transition: background 0.2s ease;
}

.btn-mentor:hover {
    background: #0369A1;
    color: #FFFFFF;
}

/* ── Dynamic Knowledge Graph ── */
.knowledge-graph-section {
    background: #0F172A;
    color: #F8FAFC;
    border-radius: 20px;
    padding: 1.75rem;
    margin-bottom: 2.5rem;
    border: 1px solid #1E293B;
}

.section-header-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.section-heading {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.25rem;
}

.section-subheading {
    font-size: 0.875rem;
    color: #94A3B8;
    margin: 0;
}

.graph-legend {
    display: flex;
    gap: 1rem;
    font-size: 0.8125rem;
    color: #CBD5E1;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.legend-mastered { background: #F59E0B; box-shadow: 0 0 8px #F59E0B; }
.legend-progress { background: #38BDF8; box-shadow: 0 0 6px #38BDF8; }
.legend-gap { background: #475569; }

.graph-viewport-wrapper {
    position: relative;
    width: 100%;
    background: #0B1120;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid #1E293B;
}

#pathway-canvas {
    display: block;
    width: 100%;
    height: 520px;
}

.graph-tooltip {
    position: absolute;
    background: #1E293B;
    color: #F8FAFC;
    border: 1px solid #334155;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.8125rem;
    pointer-events: none;
    z-index: 20;
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
    max-width: 260px;
}

/* ── Dashboard Grid & Time Analytics ── */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.75rem;
}

@media (max-width: 800px) {
    .dashboard-grid { grid-template-columns: 1fr; }
}

.dashboard-panel {
    background: var(--color-card-bg, #FFFFFF);
    border: 1px solid var(--color-border, #E2E8F0);
    border-radius: 16px;
    padding: 1.75rem;
}

[data-theme="dark"] .dashboard-panel {
    background: #1E293B;
    border-color: #334155;
}

.panel-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.panel-desc {
    font-size: 0.84375rem;
    color: var(--color-text-secondary, #64748B);
    margin-bottom: 1.5rem;
}

.concept-badges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 0.75rem;
}

.concept-badge {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    border-radius: 10px;
    border: 1px solid var(--color-border, #E2E8F0);
    background: var(--color-surface, #F8FAFC);
}

[data-theme="dark"] .concept-badge {
    background: #0F172A;
    border-color: #334155;
}

.badge-mastered {
    border-color: rgba(245, 158, 11, 0.4);
    background: rgba(245, 158, 11, 0.08);
}

.badge-icon {
    font-size: 1.125rem;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.05);
}

.badge-info {
    display: flex;
    flex-direction: column;
}

.badge-title {
    font-size: 0.8125rem;
    font-weight: 700;
}

.badge-status {
    font-size: 0.7rem;
    color: var(--color-text-secondary, #64748B);
}

/* Time Bars */
.time-bars-wrapper {
    display: flex;
    justify-content: space-around;
    align-items: flex-end;
    height: 180px;
    padding-top: 1rem;
    border-bottom: 2px solid var(--color-border, #E2E8F0);
}

.time-bar-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 20%;
    height: 100%;
    justify-content: flex-end;
    position: relative;
}

.time-bar-fill {
    width: 36px;
    background: linear-gradient(180deg, #38BDF8, #0284C7);
    border-radius: 6px 6px 0 0;
    transition: height 0.5s ease;
    min-height: 8px;
}

.time-bar-count {
    font-size: 0.8125rem;
    font-weight: 700;
    margin-bottom: 0.35rem;
}

.time-bar-label {
    margin-top: 0.5rem;
    font-size: 0.75rem;
    text-align: center;
    color: var(--color-text-secondary, #64748B);
}

/* ── Commonplace Book & Quote Notes ── */
.commonplace-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    gap: 1rem;
    flex-wrap: wrap;
}

.search-input-wrapper {
    position: relative;
    flex: 1;
    min-width: 260px;
}

.search-input-wrapper svg {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-secondary, #94A3B8);
}

.search-input-wrapper input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.75rem;
    border-radius: 10px;
    border: 1px solid var(--color-border, #CBD5E1);
    background: var(--color-card-bg, #FFFFFF);
    font-size: 0.9375rem;
}

.quote-card {
    background: var(--color-card-bg, #FFFFFF);
    border: 1px solid var(--color-border, #E2E8F0);
    border-radius: 14px;
    padding: 1.5rem;
    margin-bottom: 1.25rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.03);
}

[data-theme="dark"] .quote-card {
    background: #1E293B;
    border-color: #334155;
}

.quote-body {
    border-left: 4px solid var(--color-primary, #D97706);
    padding-left: 1rem;
    margin: 0 0 1.25rem 0;
    font-size: 1.0625rem;
    font-style: italic;
    line-height: 1.6;
}

.quote-note-section {
    margin-bottom: 1rem;
    position: relative;
}

.note-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-text-secondary, #64748B);
    margin-bottom: 0.35rem;
}

.note-textarea {
    width: 100%;
    padding: 0.6rem 0.8rem;
    border-radius: 8px;
    border: 1px solid var(--color-border, #CBD5E1);
    background: var(--color-surface, #F8FAFC);
    font-size: 0.875rem;
    font-family: inherit;
    resize: vertical;
    min-height: 54px;
}

[data-theme="dark"] .note-textarea {
    background: #0F172A;
    border-color: #334155;
    color: #F8FAFC;
}

.note-saved-indicator {
    position: absolute;
    right: 0.75rem;
    bottom: 0.75rem;
    font-size: 0.7rem;
    color: #10B981;
    font-weight: 600;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.note-saved-indicator.visible { opacity: 1; }

.quote-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8125rem;
    color: var(--color-text-secondary, #94A3B8);
}

.btn-remove-highlight {
    background: transparent;
    border: none;
    color: #EF4444;
    cursor: pointer;
    font-size: 0.8125rem;
    font-weight: 600;
}

/* Modal for PDF Export */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.modal-backdrop[hidden] { display: none !important; }

.modal-card {
    background: var(--color-card-bg, #FFFFFF);
    border-radius: 16px;
    max-width: 500px;
    width: 100%;
    padding: 1.75rem;
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

[data-theme="dark"] .modal-card {
    background: #1E293B;
    color: #F8FAFC;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.modal-header h3 { font-size: 1.25rem; font-weight: 700; margin: 0; }
.modal-close-btn { background: none; border: none; font-size: 1.5rem; cursor: pointer; color: inherit; }
.modal-body { margin-bottom: 1.5rem; }
.modal-intro { font-size: 0.875rem; color: var(--color-text-secondary, #64748B); margin-bottom: 1.25rem; }
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-size: 0.8125rem; font-weight: 600; margin-bottom: 0.35rem; }
.form-group input, .form-group textarea {
    width: 100%;
    padding: 0.65rem 0.85rem;
    border-radius: 8px;
    border: 1px solid var(--color-border, #CBD5E1);
    font-size: 0.875rem;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

.printable-notebook-container { display: none; }

/* ── Encrypted QR Sync ── */
.sync-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

@media (max-width: 850px) {
    .sync-grid { grid-template-columns: 1fr; }
}

.sync-card {
    background: var(--color-card-bg, #FFFFFF);
    border: 1px solid var(--color-border, #E2E8F0);
    border-radius: 16px;
    padding: 2rem;
}

[data-theme="dark"] .sync-card {
    background: #1E293B;
    border-color: #334155;
}

.card-header {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-bottom: 1.5rem;
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(2, 132, 199, 0.1);
    color: #0284C7;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.card-title { font-size: 1.25rem; font-weight: 700; margin: 0; }
.card-subtitle { font-size: 0.84375rem; color: var(--color-text-secondary, #64748B); margin: 0; }
.btn-block { width: 100%; text-align: center; justify-content: center; }

.qr-output-section {
    margin-top: 1.5rem;
    text-align: center;
}

.qr-canvas-wrapper {
    display: inline-block;
    padding: 1rem;
    background: #FFFFFF;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    margin-bottom: 1rem;
}

#qr-canvas { display: block; }

.import-tabs {
    display: flex;
    border-bottom: 1px solid var(--color-border, #E2E8F0);
    margin-bottom: 1.25rem;
}

.tab-btn {
    background: none;
    border: none;
    padding: 0.6rem 1rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text-secondary, #64748B);
    cursor: pointer;
    border-bottom: 2px solid transparent;
}

.tab-btn.active {
    color: #0284C7;
    border-bottom-color: #0284C7;
}

.tab-content { display: none; }
.tab-content.active { display: block; }

.camera-preview-wrapper {
    position: relative;
    width: 100%;
    height: 200px;
    background: #000;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 1rem;
}

#camera-video { width: 100%; height: 100%; object-fit: cover; }

.import-alert {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
}

.alert-success { background: rgba(16, 185, 129, 0.15); color: #059669; border: 1px solid #10B981; }
.alert-error { background: rgba(239, 68, 68, 0.15); color: #DC2626; border: 1px solid #EF4444; }

/* ─── Content Structure: DNA of Mastery ──────────────────────────────── */

/* 1. "From Axiom to Production" 10-Step Pipeline Stepper */
.pipeline-stepper-container {
    background: var(--color-surface, #F8FAFC);
    border: 1px solid var(--color-border, #E2E8F0);
    border-radius: 12px;
    padding: 1rem 1.25rem;
    margin: 1.5rem 0;
}

[data-theme="dark"] .pipeline-stepper-container {
    background: #0F172A;
    border-color: #1E293B;
}

.pipeline-stepper-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    margin-bottom: 0.65rem;
}

.stepper-tag {
    font-weight: 800;
    letter-spacing: 0.08em;
    color: #D97706;
}

.stepper-stage {
    color: var(--color-text-secondary, #64748B);
}

.pipeline-stepper-bar {
    display: flex;
    gap: 0.35rem;
    height: 10px;
    align-items: center;
}

.stepper-segment {
    flex: 1;
    height: 6px;
    background: var(--color-border, #CBD5E1);
    border-radius: 9999px;
    position: relative;
    transition: all 0.3s ease;
}

[data-theme="dark"] .stepper-segment {
    background: #334155;
}

.stepper-segment.completed {
    background: #0284C7;
}

.stepper-segment.active {
    background: linear-gradient(90deg, #F59E0B, #10B981);
    height: 10px;
    box-shadow: 0 0 10px rgba(245, 158, 11, 0.5);
}

/* 2. Article DNA Visual Signature */
.article-dna-signature {
    background: var(--color-card-bg, #FFFFFF);
    border: 1px solid var(--color-border, #E2E8F0);
    border-left: 4px solid #0284C7;
    border-radius: 12px;
    padding: 1.25rem;
    margin-bottom: 2rem;
}

[data-theme="dark"] .article-dna-signature {
    background: #1E293B;
    border-color: #334155;
    border-left-color: #38BDF8;
}

.dna-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    color: #0284C7;
    margin-bottom: 0.85rem;
}

.dna-graph-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.dna-node-column {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.dna-col-label {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--color-text-secondary, #64748B);
    text-transform: uppercase;
}

.dna-chip {
    font-size: 0.8125rem;
    font-weight: 600;
    padding: 0.3rem 0.75rem;
    border-radius: 8px;
    display: inline-block;
}

.dna-parent-chip {
    background: rgba(2, 132, 199, 0.1);
    color: #0284C7;
    border: 1px solid rgba(2, 132, 199, 0.25);
}

.dna-current-chip {
    background: rgba(245, 158, 11, 0.15);
    color: #D97706;
    border: 1px solid rgba(245, 158, 11, 0.4);
}

.dna-child-chip {
    background: rgba(16, 185, 129, 0.1);
    color: #059669;
    border: 1px solid rgba(16, 185, 129, 0.25);
}

.dna-connector {
    color: var(--color-border, #CBD5E1);
    display: flex;
    align-items: center;
}

/* 3. Issue Zero Immersion & Breathing Typography */
.issue-zero-container {
    position: relative;
    padding-top: 3rem;
    padding-bottom: 5rem;
    max-width: 820px;
}

.issue-zero-hero {
    text-align: center;
    margin-bottom: 3.5rem;
}

.issue-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    color: #F59E0B;
    background: rgba(245, 158, 11, 0.12);
    padding: 0.35rem 1rem;
    border-radius: 9999px;
    margin-bottom: 1rem;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.breathing-title {
    font-size: 2.75rem;
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: 1rem;
    animation: breathingType 4s ease-in-out infinite alternate;
}

@keyframes breathingType {
    0% { letter-spacing: -0.02em; opacity: 0.92; }
    50% { letter-spacing: 0.01em; opacity: 1; filter: drop-shadow(0 0 12px rgba(245, 158, 11, 0.2)); }
    100% { letter-spacing: -0.02em; opacity: 0.92; }
}

.issue-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary, #64748B);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.issue-meta-row {
    font-size: 0.875rem;
    color: var(--color-text-secondary, #94A3B8);
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    align-items: center;
}

/* Pure CSS Quantum Particle Background (Zero JS) */
.quantum-particle-field {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
    opacity: 0.4;
}

.particle {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, #38BDF8 0%, transparent 70%);
    animation: floatParticle 12s ease-in-out infinite alternate;
}

.particle-1 { width: 120px; height: 120px; top: 15%; left: 10%; animation-duration: 14s; }
.particle-2 { width: 200px; height: 200px; top: 60%; right: 12%; animation-duration: 18s; animation-delay: -3s; }
.particle-3 { width: 90px; height: 90px; top: 75%; left: 20%; animation-duration: 10s; animation-delay: -5s; }
.particle-4 { width: 160px; height: 160px; top: 25%; right: 25%; animation-duration: 16s; animation-delay: -7s; }

@keyframes floatParticle {
    0% { transform: translate3d(0, 0, 0) scale(1); }
    50% { transform: translate3d(30px, -40px, 0) scale(1.15); }
    100% { transform: translate3d(-20px, 30px, 0) scale(0.9); }
}

.equation-showcase-box {
    background: #0F172A;
    color: #F8FAFC;
    border-radius: 16px;
    padding: 2rem;
    margin: 2.5rem 0;
    border: 1px solid #1E293B;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.equation-header {
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    color: #38BDF8;
    margin-bottom: 1rem;
}

.equation-content {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.equation-caption {
    font-size: 0.875rem;
    color: #94A3B8;
    margin: 0;
}

.principles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    margin: 2rem 0;
}

@media (max-width: 700px) {
    .principles-grid { grid-template-columns: 1fr; }
}

.principle-card {
    background: var(--color-card-bg, #FFFFFF);
    border: 1px solid var(--color-border, #E2E8F0);
    border-radius: 12px;
    padding: 1.5rem;
}

[data-theme="dark"] .principle-card {
    background: #1E293B;
    border-color: #334155;
}

.principle-num {
    font-size: 1.5rem;
    font-weight: 900;
    color: #D97706;
    display: block;
    margin-bottom: 0.5rem;
}

.principle-card h3 { font-size: 1.125rem; font-weight: 700; margin-bottom: 0.5rem; }
.principle-card p { font-size: 0.875rem; color: var(--color-text-secondary, #64748B); margin: 0; }

.pledge-card {
    background: linear-gradient(135deg, #1E293B 0%, #0F172A 100%);
    color: #FFFFFF;
    border-radius: 16px;
    padding: 2.5rem;
    text-align: center;
    margin-top: 3rem;
    border: 1px solid #334155;
}

.pledge-title { font-size: 1.5rem; font-weight: 800; color: #F59E0B; margin-bottom: 0.75rem; }
.pledge-text { font-size: 1.25rem; font-style: italic; color: #CBD5E1; margin-bottom: 1.75rem; }
.pledge-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* 4. Living Codex Interactive Studio & Changelog */
.changelog-timeline {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.changelog-entry {
    background: var(--color-surface, #F8FAFC);
    border-left: 3px solid #0284C7;
    padding: 1.25rem;
    border-radius: 0 10px 10px 0;
}

[data-theme="dark"] .changelog-entry {
    background: #0F172A;
}

.changelog-version { font-size: 0.75rem; font-weight: 800; color: #0284C7; }
.changelog-date { font-size: 0.75rem; color: var(--color-text-secondary, #64748B); margin-bottom: 0.5rem; }
.changelog-title { font-size: 1.0625rem; font-weight: 700; margin-bottom: 0.35rem; }
.changelog-summary { font-size: 0.875rem; color: var(--color-text-secondary, #64748B); margin: 0; }

.algo-tabs {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
}

.algo-tab-btn {
    padding: 0.6rem 1.25rem;
    border-radius: 8px;
    border: 1px solid var(--color-border, #CBD5E1);
    background: var(--color-card-bg, #FFFFFF);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
}

[data-theme="dark"] .algo-tab-btn {
    background: #0F172A;
    border-color: #334155;
    color: #F8FAFC;
}

.algo-tab-btn.active {
    background: #0284C7;
    color: #FFFFFF;
    border-color: #0284C7;
}

.algo-code-card { display: none; }
.algo-code-card.active { display: block; }

.algo-card-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.8125rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.algo-speedup { color: #D97706; }

.algo-code-preview pre {
    background: #0F172A;
    color: #F8FAFC;
    padding: 1.25rem;
    border-radius: 10px;
    overflow-x: auto;
    font-size: 0.875rem;
}

.case-studies-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

@media (max-width: 750px) {
    .case-studies-grid { grid-template-columns: 1fr; }
}

.case-study-card {
    background: var(--color-surface, #F8FAFC);
    border: 1px solid var(--color-border, #E2E8F0);
    border-radius: 12px;
    padding: 1.25rem;
}

[data-theme="dark"] .case-study-card {
    background: #0F172A;
    border-color: #334155;
}

.cs-header { display: flex; justify-content: space-between; font-size: 0.75rem; color: var(--color-text-secondary, #64748B); margin-bottom: 0.5rem; }
.cs-title { font-size: 1.0625rem; font-weight: 700; margin-bottom: 0.35rem; }
.cs-desc { font-size: 0.875rem; color: var(--color-text-secondary, #64748B); margin: 0; }

/* ─── Community & Credibility: The Silent Armada ───────────────────────── */

/* 1. Wall of Observers Ticker Marquee */
.observers-marquee-wrapper {
    background: #0F172A;
    color: #F8FAFC;
    overflow: hidden;
    white-space: nowrap;
    border-radius: 12px;
    padding: 0.75rem 0;
    margin-bottom: 2rem;
    border: 1px solid #1E293B;
}

.marquee-track {
    display: inline-flex;
    gap: 2rem;
    animation: marqueeScroll 30s linear infinite;
}

@keyframes marqueeScroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.marquee-item {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.marquee-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #10B981;
}

/* 2. "Observe Together" Private Reading Groups */
.reading-group-container {
    padding-top: 2.5rem;
    padding-bottom: 4rem;
}

.active-group-banner {
    background: linear-gradient(135deg, rgba(2, 132, 199, 0.1) 0%, rgba(16, 185, 129, 0.1) 100%);
    border: 1px solid rgba(2, 132, 199, 0.3);
    border-radius: 16px;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.group-badge {
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    color: #0284C7;
}

.group-banner-title { font-size: 1.375rem; font-weight: 800; margin: 0.2rem 0; }
.group-banner-meta { font-size: 0.875rem; color: var(--color-text-secondary, #64748B); margin: 0; }

.group-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.75rem;
}

@media (max-width: 800px) {
    .group-grid { grid-template-columns: 1fr; }
}

.group-queue-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    min-height: 120px;
}

.group-queue-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--color-surface, #F8FAFC);
    border-radius: 10px;
    border: 1px solid var(--color-border, #E2E8F0);
}

[data-theme="dark"] .group-queue-item {
    background: #0F172A;
    border-color: #334155;
}

.queue-num { font-size: 0.8125rem; font-weight: 800; color: #0284C7; margin-right: 0.5rem; }
.queue-title { font-size: 0.9375rem; font-weight: 600; text-decoration: none; color: inherit; }
.btn-remove-queue { background: none; border: none; font-size: 1.25rem; color: #EF4444; cursor: pointer; }

.queue-select-row {
    display: flex;
    gap: 0.75rem;
}

.queue-select-row select {
    flex: 1;
    padding: 0.6rem;
    border-radius: 8px;
    border: 1px solid var(--color-border, #CBD5E1);
}

.group-notes-feed {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    max-height: 260px;
    overflow-y: auto;
    margin-bottom: 1.25rem;
}

.group-note-card {
    background: var(--color-surface, #F8FAFC);
    border-radius: 10px;
    padding: 0.85rem 1rem;
    border-left: 3px solid #10B981;
}

[data-theme="dark"] .group-note-card {
    background: #0F172A;
}

.note-card-header {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    margin-bottom: 0.25rem;
}

.note-author { font-weight: 700; color: #10B981; }
.note-time { color: var(--color-text-secondary, #94A3B8); }
.note-card-text { font-size: 0.875rem; margin: 0; }
.ephemeral-timer-badge { font-size: 0.75rem; font-weight: 700; color: #10B981; background: rgba(16,185,129,0.1); padding: 0.2rem 0.6rem; border-radius: 6px; }

/* 3. The Annual Observer Summit Portal */
.summit-container {
    padding-top: 2.5rem;
    padding-bottom: 4rem;
}

.summit-hero {
    text-align: center;
    margin-bottom: 2.5rem;
}

.summit-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    color: #F59E0B;
    background: rgba(245, 158, 11, 0.1);
    padding: 0.3rem 0.85rem;
    border-radius: 9999px;
    margin-bottom: 0.75rem;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.summit-title { font-size: 2.5rem; font-weight: 900; margin-bottom: 0.75rem; }
.summit-subtitle { font-size: 1.0625rem; color: var(--color-text-secondary, #64748B); max-width: 660px; margin: 0 auto; }

.summit-invite-card {
    background: #0F172A;
    color: #F8FAFC;
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    margin-bottom: 3rem;
    border: 1px solid #1E293B;
}

.invite-tag { font-size: 0.75rem; font-weight: 800; color: #38BDF8; letter-spacing: 0.1em; }
.summit-invite-card h2 { font-size: 1.375rem; font-weight: 700; color: #F8FAFC !important; margin: 0.35rem 0 1.25rem 0; }

.invite-form .form-input-group { max-width: 540px; margin: 0 auto; }

.invite-msg { margin-top: 1rem; font-size: 0.875rem; }

.agenda-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 1.5rem;
}

@media (max-width: 850px) {
    .agenda-grid { grid-template-columns: 1fr; }
}

.agenda-day-card {
    background: var(--color-card-bg, #FFFFFF);
    border: 1px solid var(--color-border, #E2E8F0);
    border-radius: 14px;
    padding: 1.5rem;
}

[data-theme="dark"] .agenda-day-card {
    background: #1E293B;
    border-color: #334155;
}

.day-tag { font-size: 0.75rem; font-weight: 800; color: #0284C7; }
.day-title { font-size: 1.0625rem; font-weight: 700; margin: 0.25rem 0 1.25rem 0; }

.day-events-list { display: flex; flex-direction: column; gap: 1rem; }
.event-item { border-left: 2px solid #0284C7; padding-left: 0.85rem; }
.event-time { font-size: 0.75rem; font-weight: 700; color: #D97706; }
.event-topic { font-size: 0.9375rem; font-weight: 600; margin: 0.1rem 0; }
.event-speaker { font-size: 0.75rem; color: var(--color-text-secondary, #64748B); }

.readings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

@media (max-width: 700px) {
    .readings-grid { grid-template-columns: 1fr; }
}

.reading-card {
    background: var(--color-surface, #F8FAFC);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--color-border, #E2E8F0);
}

[data-theme="dark"] .reading-card {
    background: #0F172A;
    border-color: #334155;
}

.reading-badge { font-size: 0.7rem; font-weight: 800; color: #10B981; }
.reading-card h3 { font-size: 1.125rem; font-weight: 700; margin: 0.35rem 0; }
.reading-card p { font-size: 0.875rem; color: var(--color-text-secondary, #64748B); margin-bottom: 1rem; }
.reading-link { font-size: 0.875rem; font-weight: 700; color: #0284C7; text-decoration: none; }

/* 4. Certification Pathway & Printable Certificate Layout */
.certification-container {
    padding-top: 2.5rem;
    padding-bottom: 4rem;
}

.cert-progress-card {
    background: var(--color-card-bg, #FFFFFF);
    border: 1px solid var(--color-border, #E2E8F0);
    border-radius: 14px;
    padding: 1.5rem;
    margin-bottom: 2.5rem;
}

[data-theme="dark"] .cert-progress-card {
    background: #1E293B;
    border-color: #334155;
}

.cert-progress-header {
    display: flex;
    justify-content: space-between;
    font-size: 0.8125rem;
    font-weight: 700;
    margin-bottom: 0.65rem;
}

.cert-progress-label { color: #0284C7; }
.cert-score-label { color: var(--color-text-secondary, #64748B); }

.cert-progress-bar {
    height: 10px;
    background: var(--color-border, #E2E8F0);
    border-radius: 9999px;
    overflow: hidden;
}

.cert-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #38BDF8, #10B981);
    transition: width 0.5s ease;
}

.modules-list {
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
    margin-bottom: 3rem;
}

.module-card {
    background: var(--color-card-bg, #FFFFFF);
    border: 1px solid var(--color-border, #E2E8F0);
    border-radius: 16px;
    padding: 1.75rem;
}

[data-theme="dark"] .module-card {
    background: #1E293B;
    border-color: #334155;
}

.module-number { font-size: 0.75rem; font-weight: 800; color: #D97706; }
.module-title { font-size: 1.25rem; font-weight: 700; margin: 0.25rem 0; }
.module-desc { font-size: 0.875rem; color: var(--color-text-secondary, #64748B); margin-bottom: 1.25rem; }

.quiz-box {
    background: var(--color-surface, #F8FAFC);
    border-radius: 12px;
    padding: 1.25rem;
    border: 1px solid var(--color-border, #E2E8F0);
}

[data-theme="dark"] .quiz-box {
    background: #0F172A;
    border-color: #334155;
}

.quiz-question { font-size: 0.9375rem; margin-bottom: 1rem; }

.quiz-options-group {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.quiz-option-card {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--color-border, #CBD5E1);
    background: var(--color-card-bg, #FFFFFF);
    cursor: pointer;
    font-size: 0.875rem;
}

[data-theme="dark"] .quiz-option-card {
    background: #1E293B;
    border-color: #334155;
}

.quiz-feedback {
    margin-top: 1rem;
    padding: 0.6rem 1rem;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
}

.feedback-correct { background: rgba(16,185,129,0.15); color: #059669; }
.feedback-wrong { background: rgba(239,68,68,0.15); color: #DC2626; }

.cert-gen-card {
    background: #0F172A;
    color: #F8FAFC;
    border-radius: 16px;
    padding: 2.5rem;
    text-align: center;
    border: 1px solid #1E293B;
}

.gen-badge { font-size: 0.75rem; font-weight: 800; color: #F59E0B; letter-spacing: 0.1em; }
.cert-gen-card h2 { font-size: 1.5rem; font-weight: 800; color: #F8FAFC !important; margin: 0.35rem 0; }
.cert-claim-form { max-width: 480px; margin: 1.5rem auto 0; }


/* Printable Certificate Sheet */
.certificate-printable-wrapper {
    margin-top: 3rem;
    text-align: center;
}

.cert-paper {
    background: #FFFDF9;
    color: #1E293B;
    padding: 3rem;
    border-radius: 4px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    max-width: 900px;
    margin: 0 auto 2rem;
    text-align: center;
    position: relative;
    border: 2px solid #D97706;
}

.cert-border-outer { border: 2px solid #D97706; padding: 0.5rem; }
.cert-border-inner { border: 1px solid #CBD5E1; padding: 2.5rem; position: relative; }

.cert-journal-name { font-size: 1.5rem; font-weight: 900; letter-spacing: 0.15em; color: #0F172A; }
.cert-subtitle-line { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.1em; color: #D97706; margin-bottom: 2.5rem; }

.cert-prose-intro { font-size: 1rem; font-style: italic; color: #64748B; margin-bottom: 0.5rem; }
.cert-student-fullname { font-size: 2.5rem; font-weight: 900; color: #0284C7; text-decoration: underline; margin-bottom: 1rem; }
.cert-prose-body { font-size: 1.0625rem; color: #475569; max-width: 580px; margin: 0 auto 1.5rem; }
.cert-degree-title { font-size: 1.5rem; font-weight: 800; color: #0F172A; margin-bottom: 1.5rem; }
.cert-date-line { font-size: 0.9375rem; color: #64748B; margin-bottom: 3rem; }

.cert-footer-block { display: flex; justify-content: space-between; align-items: flex-end; text-align: left; }
.cert-sig-box { display: flex; flex-direction: column; font-size: 0.8125rem; }
.sig-line { width: 160px; height: 1px; background: #0F172A; margin-bottom: 0.5rem; }

.cert-hash-box { text-align: right; max-width: 380px; }
.hash-label { font-size: 0.65rem; font-weight: 800; color: #64748B; display: block; }
.hash-code { font-size: 0.7rem; word-break: break-all; color: #0284C7; font-family: monospace; display: block; margin: 0.2rem 0; }
.hash-verify-hint { font-size: 0.65rem; color: #94A3B8; }

@media print {
    .site-header, .site-footer, .cert-header, .cert-progress-card, .modules-list, .cert-generator-section, .cert-print-actions { display: none !important; }
    .certificate-printable-wrapper { display: block !important; margin: 0; }
    .cert-paper { box-shadow: none; border: none; padding: 0; }
}

/* ─── Revenue Without Sacrifice: Observer Pro & Ethical Sponsorship ─────── */

/* 1. Observer Pro Portal */
.pro-container {
    padding-top: 2.5rem;
    padding-bottom: 4rem;
}

.pro-hero {
    text-align: center;
    margin-bottom: 3.5rem;
}

.pro-badge-row {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.pro-badge {
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    color: #D97706;
    background: rgba(217, 119, 6, 0.12);
    padding: 0.3rem 0.85rem;
    border-radius: 9999px;
    border: 1px solid rgba(217, 119, 6, 0.3);
}

.pro-status-tag {
    font-size: 0.75rem;
    font-weight: 800;
    padding: 0.3rem 0.75rem;
    border-radius: 6px;
}

.tag-pro-active { background: #10B981; color: #FFFFFF; }
.tag-pro-inactive { background: var(--color-surface, #E2E8F0); color: var(--color-text-secondary, #64748B); }

.pro-title { font-size: 2.5rem; font-weight: 900; margin-bottom: 0.75rem; }
.pro-subtitle { font-size: 1.125rem; color: var(--color-text-secondary, #64748B); max-width: 680px; margin: 0 auto 1.75rem; }

.pro-section { margin-bottom: 3.5rem; }

.section-tag { font-size: 0.75rem; font-weight: 800; color: #D97706; letter-spacing: 0.1em; }
.section-desc { font-size: 0.9375rem; color: var(--color-text-secondary, #64748B); margin-bottom: 1.5rem; }

.live-dot-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8125rem;
    font-weight: 700;
    color: #10B981;
}

.live-pulse {
    width: 8px;
    height: 8px;
    background: #10B981;
    border-radius: 50%;
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    animation: livePulse 1.8s infinite;
}

@keyframes livePulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.collapse-sessions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

@media (max-width: 850px) {
    .collapse-sessions-grid { grid-template-columns: 1fr; }
}

.collapse-card {
    background: var(--color-card-bg, #FFFFFF);
    border: 1px solid var(--color-border, #E2E8F0);
    border-radius: 14px;
    padding: 1.5rem;
    border-top: 3px solid #D97706;
}

[data-theme="dark"] .collapse-card {
    background: #1E293B;
    border-color: #334155;
}

.cs-card-header { display: flex; justify-content: space-between; font-size: 0.75rem; margin-bottom: 0.75rem; }
.cs-status-badge { font-weight: 800; color: #D97706; }
.cs-status-badge.recording { color: #0284C7; }
.cs-date { color: var(--color-text-secondary, #64748B); }
.cs-title { font-size: 1.0625rem; font-weight: 700; margin-bottom: 0.5rem; }
.cs-speaker { font-size: 0.8125rem; color: #0284C7; margin-bottom: 0.5rem; }
.cs-desc { font-size: 0.875rem; color: var(--color-text-secondary, #64748B); margin: 0; }

.pro-forum-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 1.75rem;
}

@media (max-width: 850px) {
    .pro-forum-grid { grid-template-columns: 1fr; }
}

.forum-topics-list { display: flex; flex-direction: column; gap: 1rem; }

.forum-topic-card {
    background: var(--color-surface, #F8FAFC);
    border: 1px solid var(--color-border, #E2E8F0);
    border-radius: 12px;
    padding: 1.25rem;
}

[data-theme="dark"] .forum-topic-card {
    background: #0F172A;
    border-color: #334155;
}

.topic-meta { display: flex; justify-content: space-between; font-size: 0.75rem; margin-bottom: 0.35rem; }
.topic-tag { font-weight: 800; color: #0284C7; }
.topic-author { color: var(--color-text-secondary, #64748B); }
.topic-title { font-size: 1.0625rem; font-weight: 700; margin-bottom: 0.65rem; }
.topic-footer { display: flex; justify-content: space-between; font-size: 0.8125rem; color: var(--color-text-secondary, #64748B); }
.topic-link { font-weight: 700; color: #D97706; text-decoration: none; }

.forum-ask-box {
    background: var(--color-card-bg, #FFFFFF);
    border: 1px solid var(--color-border, #E2E8F0);
    border-radius: 14px;
    padding: 1.5rem;
}

[data-theme="dark"] .forum-ask-box {
    background: #1E293B;
    border-color: #334155;
}

.forum-ask-box h3 { font-size: 1.125rem; font-weight: 700; margin-bottom: 0.35rem; }
.forum-ask-box p { font-size: 0.84rem; color: var(--color-text-secondary, #64748B); margin-bottom: 1rem; }

.reports-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 700px) {
    .reports-grid { grid-template-columns: 1fr; }
}

.report-card {
    background: var(--color-surface, #F8FAFC);
    color: var(--color-text, #0F172A);
    border-radius: 14px;
    padding: 1.75rem;
    border: 1px solid var(--color-border, #E2E8F0);
}

.report-quarter { font-size: 0.75rem; font-weight: 800; color: #0284C7; letter-spacing: 0.1em; }
.report-title { font-size: 1.125rem; font-weight: 700; color: var(--color-text) !important; margin: 0.35rem 0; }
.report-pages { font-size: 0.75rem; color: var(--color-text-secondary); margin-bottom: 0.75rem; }
.report-desc { font-size: 0.875rem; color: var(--color-text-secondary) !important; margin-bottom: 1.25rem; }

[data-theme="dark"] .report-card {
    background: #0F172A;
    border-color: #1E293B;
    color: #F8FAFC;
}

[data-theme="dark"] .report-quarter { color: #38BDF8; }
[data-theme="dark"] .report-title { color: #F8FAFC !important; }
[data-theme="dark"] .report-desc { color: #CBD5E1 !important; }

.pro-benefits-card {
    background: var(--color-surface, #F8FAFC);
    color: var(--color-text, #0F172A);
    border-radius: 16px;
    padding: 2.5rem;
    text-align: center;
    border: 1px solid var(--color-border, #E2E8F0);
}

.benefits-tag { font-size: 0.75rem; font-weight: 800; color: #D97706; letter-spacing: 0.1em; }
.pro-benefits-card h2 { font-size: 1.5rem; font-weight: 800; color: var(--color-text) !important; margin: 0.35rem 0 0.75rem 0; }
.pro-benefits-card p { font-size: 1rem; color: var(--color-text-secondary) !important; max-width: 640px; margin: 0 auto 1.5rem; }

[data-theme="dark"] .pro-benefits-card {
    background: linear-gradient(135deg, #1E293B 0%, #0F172A 100%);
    border-color: #334155;
    color: #FFFFFF;
}

[data-theme="dark"] .benefits-tag { color: #F59E0B; }
[data-theme="dark"] .pro-benefits-card h2 { color: #FFFFFF !important; }
[data-theme="dark"] .pro-benefits-card p { color: #CBD5E1 !important; }

/* 2. Ethical Sponsorship Model */
.sponsorship-container {
    padding-top: 2.5rem;
    padding-bottom: 4rem;
}

.sponsorship-header {
    text-align: center;
    margin-bottom: 3.5rem;
}

.pillars-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 3.5rem;
}

@media (max-width: 850px) {
    .pillars-grid { grid-template-columns: 1fr; }
}

.pillar-card {
    background: var(--color-card-bg, #FFFFFF);
    border: 1px solid var(--color-border, #E2E8F0);
    border-radius: 14px;
    padding: 1.75rem;
}

[data-theme="dark"] .pillar-card {
    background: #1E293B;
    border-color: #334155;
}

.pillar-num { font-size: 1.5rem; font-weight: 900; color: #10B981; display: block; margin-bottom: 0.5rem; }
.pillar-card h3 { font-size: 1.125rem; font-weight: 700; color: var(--color-text); margin-bottom: 0.5rem; }
.pillar-card p { font-size: 0.875rem; color: var(--color-text-secondary); margin: 0; }

.partner-inquiry-card {
    background: var(--color-surface, #F8FAFC);
    color: var(--color-text, #0F172A);
    border-radius: 16px;
    padding: 2.5rem;
    text-align: center;
    margin-bottom: 3.5rem;
    border: 1px solid var(--color-border, #E2E8F0);
}

.inquiry-badge { font-size: 0.75rem; font-weight: 800; color: #059669; letter-spacing: 0.1em; }
.partner-inquiry-card h2 { font-size: 1.5rem; font-weight: 800; color: var(--color-text) !important; margin: 0.35rem 0 0.75rem 0; }
.partner-inquiry-card p { font-size: 1rem; color: var(--color-text-secondary) !important; max-width: 620px; margin: 0 auto 1.5rem; }

[data-theme="dark"] .partner-inquiry-card {
    background: #0F172A;
    border-color: #1E293B;
    color: #F8FAFC;
}

[data-theme="dark"] .inquiry-badge { color: #10B981; }
[data-theme="dark"] .partner-inquiry-card h2 { color: #F8FAFC !important; }
[data-theme="dark"] .partner-inquiry-card p { color: #CBD5E1 !important; }


/* Article Sponsor Badge */
.article-sponsor-badge {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 10px;
    padding: 0.6rem 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
    font-size: 0.8125rem;
}

.sponsor-tag { font-weight: 800; color: #059669; letter-spacing: 0.08em; }
.sponsor-attribution { color: var(--color-text-secondary, #64748B); }
.sponsor-attribution a { color: #0284C7; font-weight: 700; text-decoration: none; }


/* ─── The Observer's Touch & Collapse Uncertainty ────────────────────── */

/* 1. The Observer Line Signature Animation */
#reading-progress {
    position: relative;
    overflow: visible !important;
}

.observer-progress-line {
    position: absolute;
    top: -2px;
    right: 0;
    width: 24px;
    height: 6px;
    background: radial-gradient(circle, #F59E0B 0%, #10B981 70%, transparent 100%);
    border-radius: 50%;
    filter: drop-shadow(0 0 6px rgba(245, 158, 11, 0.8));
    animation: observerPulseState 1.5s ease-in-out infinite alternate;
}

@keyframes observerPulseState {
    0% { transform: scale(0.8); opacity: 0.7; }
    100% { transform: scale(1.4); opacity: 1; }
}

/* 2. Ubuntu Programming Ligatures for Code Blocks */
pre, code, kbd, samp {
    font-family: 'Ubuntu Mono', 'Fira Code', 'JetBrains Mono', Consolas, Monaco, monospace;
    font-variant-ligatures: contextual;
    font-feature-settings: "calt" 1, "liga" 1;
}

/* 3. Print-to-Observer PDF Journal Stylesheet */
@media print {
    @page {
        margin: 2cm 1.5cm;
    }

    body {
        background: #FFFFFF !important;
        color: #000000 !important;
        font-family: 'Georgia', 'Times New Roman', serif !important;
        font-size: 11pt !important;
        line-height: 1.5 !important;
    }

    .site-header, .site-footer, .nav-bar, .pipeline-stepper-container, 
    .article-dna-signature, .reading-progress-container, .btn, button, 
    .related-articles, .newsletter-section {
        display: none !important;
    }

    .article-container, .content-narrow {
        max-width: 100% !important;
        margin: 0 !important;
        padding: 0 !important;
    }

    .article-header {
        border-bottom: 2px solid #000000;
        padding-bottom: 1rem;
        margin-bottom: 1.5rem;
    }

    .article-title {
        font-size: 22pt !important;
        font-weight: bold !important;
        color: #000000 !important;
    }

    .article-body p {
        text-align: justify;
        text-justify: inter-word;
        margin-bottom: 1rem;
    }

    .article-body blockquote {
        border-left: 3px solid #000000 !important;
        padding-left: 1rem !important;
        font-style: italic !important;
    }

    /* Print Journal Watermark Header */
    body::before {
        content: "THE QUANTUM OBSERVER • SCIENTIFIC JOURNAL PRINT EDITION";
        display: block;
        text-align: center;
        font-size: 8pt;
        font-weight: bold;
        letter-spacing: 0.15em;
        border-bottom: 1px solid #666;
        padding-bottom: 0.4cm;
        margin-bottom: 1cm;
    }
}

/* 4. Quantum Easter Egg ("Superposition Mode") */
body.superposition-mode-active {
    animation: superpositionFlicker 0.4s ease-in-out 12 alternate;
}

@keyframes superpositionFlicker {
    0% { background: #FFFFFF; filter: contrast(1); }
    50% { background: #F8FAFC; filter: contrast(1.04) hue-rotate(5deg); }
    100% { background: #0F172A; color: #F8FAFC; filter: contrast(1.1); }
}

.superposition-toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: #0F172A;
    color: #F8FAFC;
    border: 1px solid #F59E0B;
    border-radius: 12px;
    padding: 1.25rem 1.5rem;
    box-shadow: 0 10px 30px rgba(245, 158, 11, 0.4);
    z-index: 99999;
    max-width: 360px;
    animation: toastSlideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.superposition-toast.toast-fade-out {
    opacity: 0;
    transition: opacity 0.5s ease;
}

@keyframes toastSlideUp {
    from { transform: translateY(50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* 5. "Collapse Uncertainty" Daily Core Feature */
.collapse-uncertainty-container {
    padding-top: 2.5rem;
    padding-bottom: 4rem;
}

.collapse-hero {
    text-align: center;
    margin-bottom: 3rem;
}

.hero-tag {
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    color: #10B981;
    background: rgba(16, 185, 129, 0.1);
    padding: 0.3rem 0.85rem;
    border-radius: 9999px;
    display: inline-block;
    margin-bottom: 0.75rem;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.todays-collapse-card, .home-collapse-card {
    background: var(--color-surface, #F8FAFC);
    color: var(--color-text, #0F172A);
    border-radius: 16px;
    padding: 2.25rem;
    border: 1px solid var(--color-border, #E2E8F0);
    box-shadow: var(--shadow-sm);
    margin-bottom: 3rem;
}

.collapse-card-header, .card-top {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.collapse-badge { font-weight: 800; color: #059669; letter-spacing: 0.1em; }
.collapse-date, .question-date { color: var(--color-text-secondary); }
.submissions-badge { color: #D97706; font-weight: 700; }

.question-heading, .collapse-q-title {
    font-size: 1.5rem;
    font-weight: 800;
    line-height: 1.35;
    margin-bottom: 1.5rem;
    color: var(--color-text);
}

.winning-answer-box, .collapse-w-answer {
    background: rgba(16, 185, 129, 0.08);
    border-left: 4px solid #10B981;
    border-radius: 0 12px 12px 0;
    padding: 1.25rem;
    margin-bottom: 1.5rem;
}

.answer-badge { font-size: 0.7rem; font-weight: 800; color: #059669; letter-spacing: 0.1em; margin-bottom: 0.5rem; }
.winning-quote, .answer-text { font-size: 1.125rem; font-style: italic; color: var(--color-text); margin-bottom: 0.65rem; }
.winner-attribution, .answer-author { font-size: 0.8125rem; color: var(--color-text-secondary); }

[data-theme="dark"] .todays-collapse-card,
[data-theme="dark"] .home-collapse-card {
    background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
    border-color: #334155;
    color: #F8FAFC;
}

[data-theme="dark"] .collapse-badge { color: #10B981; }
[data-theme="dark"] .collapse-date, [data-theme="dark"] .question-date { color: #94A3B8; }
[data-theme="dark"] .submissions-badge { color: #F59E0B; }
[data-theme="dark"] .question-heading, [data-theme="dark"] .collapse-q-title { color: #FFFFFF; }
[data-theme="dark"] .answer-badge { color: #10B981; }
[data-theme="dark"] .winning-quote, [data-theme="dark"] .answer-text { color: #F8FAFC; }
[data-theme="dark"] .winner-attribution, [data-theme="dark"] .answer-author { color: #94A3B8; }


.submission-card {
    background: var(--color-card-bg, #FFFFFF);
    border: 1px solid var(--color-border, #E2E8F0);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 3rem;
}

[data-theme="dark"] .submission-card {
    background: #1E293B;
    border-color: #334155;
}

.submission-card h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 0.35rem; }
.submission-card p { font-size: 0.875rem; color: var(--color-text-secondary, #64748B); margin-bottom: 1.5rem; }

.collapse-form { max-width: 680px; }

.past-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
    margin-top: 1.5rem;
}

@media (max-width: 750px) {
    .past-grid { grid-template-columns: 1fr; }
}

.past-card {
    background: var(--color-surface, #F8FAFC);
    border: 1px solid var(--color-border, #E2E8F0);
    border-radius: 12px;
    padding: 1.25rem;
}

[data-theme="dark"] .past-card {
    background: #0F172A;
    border-color: #334155;
}

.past-date { font-size: 0.75rem; font-weight: 700; color: #0284C7; }
.past-q-title { font-size: 1.0625rem; font-weight: 700; margin: 0.35rem 0; }
.past-winner { font-size: 0.8125rem; color: var(--color-text-secondary, #64748B); margin: 0; }

/* ─── Theme Toggle Button & Dark Theme Global Overrides ────────────────── */
.theme-toggle-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.45rem;
    border-radius: 50%;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    cursor: pointer;
    transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.2s;
}

.theme-toggle-btn:hover {
    background: var(--color-card-bg);
    color: var(--color-accent);
    transform: scale(1.08);
}

[data-theme="dark"] .icon-sun { display: block; color: #F59E0B; }
[data-theme="dark"] .icon-moon { display: none; }

[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: block; color: #0284C7; }

:root:not([data-theme="dark"]) .icon-sun { display: none; }
:root:not([data-theme="dark"]) .icon-moon { display: block; color: #0284C7; }

/* Global Dark Theme Component Overrides */
html[data-theme="dark"] body {
    background-color: #191919 !important;
    color: #F8FAFC;
}

html[data-theme="dark"] h1, 
html[data-theme="dark"] h2, 
html[data-theme="dark"] h3, 
html[data-theme="dark"] h4, 
html[data-theme="dark"] h5, 
html[data-theme="dark"] h6 {
    color: #F8FAFC;
}

html[data-theme="dark"] .academic-masthead {
    background: #191919 !important;
    border-bottom-color: #2A2A2A;
}

html[data-theme="dark"] .masthead-title a {
    color: #F8FAFC;
}

html[data-theme="dark"] .masthead-subtitle {
    color: #94A3B8;
}

html[data-theme="dark"] .masthead-issue-strip {
    background: #191919 !important;
    border-color: #2A2A2A;
    color: #94A3B8;
}

html[data-theme="dark"] .masthead-nav-strip {
    background: #191919 !important;
    border-color: #2A2A2A;
}

html[data-theme="dark"] .academic-nav-list li a {
    color: #CBD5E1;
}

html[data-theme="dark"] .academic-nav-list li a:hover {
    color: #38BDF8;
    background: rgba(56, 189, 248, 0.12);
}

html[data-theme="dark"] .academic-search-form input {
    background: #191919 !important;
    color: #F8FAFC;
    border-color: #2A2A2A;
}

html[data-theme="dark"] .academic-search-form kbd {
    background: #191919 !important;
    color: #94A3B8;
    border-color: #2A2A2A;
}

html[data-theme="dark"] .article-card,
html[data-theme="dark"] .sidebar-card,
html[data-theme="dark"] .codex-chapter-card,
html[data-theme="dark"] .pathway-node-card,
html[data-theme="dark"] .stats-banner {
    background: #191919 !important;
    border-color: #2A2A2A;
    color: #F8FAFC;
}

html[data-theme="dark"] .article-card .card-title a,
html[data-theme="dark"] .sidebar-title,
html[data-theme="dark"] .popular-item-title a {
    color: #F8FAFC;
}

html[data-theme="dark"] .article-card .card-excerpt,
html[data-theme="dark"] .stat-label {
    color: #94A3B8;
}

html[data-theme="dark"] .academic-footer {
    background: #191919 !important;
    border-top-color: #2A2A2A;
    color: #94A3B8;
}

html[data-theme="dark"] .academic-footer h3,
html[data-theme="dark"] .academic-footer h4 {
    color: #F8FAFC;
}

html[data-theme="dark"] .academic-footer a {
    color: #CBD5E1;
}

html[data-theme="dark"] .academic-footer a:hover {
    color: #38BDF8;
}

/* ─── 10 Next-Level Portals CSS ────────────────────────────────────── */
.portal-container {
    padding-top: 2.5rem;
    padding-bottom: 4rem;
}

.chat-box-card, .sandbox-card, .corpus-canvas-card, .chamber-card, 
.benchmark-table-card, .token-card, .disclosure-card, .hologram-card, .grant-card, .proof-card {
    background: var(--color-surface, #F8FAFC);
    border: 1px solid var(--color-border, #E2E8F0);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
}

[data-theme="dark"] .chat-box-card, 
[data-theme="dark"] .sandbox-card, 
[data-theme="dark"] .corpus-canvas-card, 
[data-theme="dark"] .chamber-card, 
[data-theme="dark"] .benchmark-table-card, 
[data-theme="dark"] .token-card, 
[data-theme="dark"] .disclosure-card, 
[data-theme="dark"] .hologram-card, 
[data-theme="dark"] .grant-card, 
[data-theme="dark"] .proof-card {
    background: #191919 !important;
    border-color: #2A2A2A;
    color: #F8FAFC;
}

.chat-box-card {
    min-height: 260px;
    max-height: 420px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.chat-bubble {
    padding: 1rem 1.25rem;
    border-radius: 12px;
    font-size: 0.9375rem;
    max-width: 85%;
    line-height: 1.5;
}

.mentor-bubble {
    background: var(--color-card-bg, #FFFFFF);
    border: 1px solid var(--color-border, #E2E8F0);
    align-self: flex-start;
}

[data-theme="dark"] .mentor-bubble {
    background: #1E293B;
    border-color: #334155;
}

.user-bubble {
    background: #0284C7;
    color: #FFFFFF;
    align-self: flex-end;
}

.proofs-grid, .chamber-grid, .disclosures-grid, .grants-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 750px) {
    .proofs-grid, .chamber-grid, .disclosures-grid, .grants-grid {
        grid-template-columns: 1fr;
    }
}

.proof-hash { font-size: 0.75rem; font-weight: 800; color: #0284C7; font-family: monospace; }
.proof-signature { font-size: 0.8125rem; background: var(--color-bg); padding: 0.5rem; border-radius: 6px; word-break: break-all; margin-top: 0.75rem; }

.circuit-output-box {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 1.5rem;
    margin-top: 1.5rem;
    text-align: left;
}

.grant-amount { font-size: 1.25rem; font-weight: 900; color: #10B981; margin-bottom: 0.5rem; }
.badge-status { background: rgba(16, 185, 129, 0.15); color: #059669; padding: 0.2rem 0.5rem; border-radius: 4px; font-weight: 700; }
.embargo-badge { font-size: 0.75rem; font-weight: 800; color: #D97706; letter-spacing: 0.08em; }


html[data-theme="dark"] .academic-footer a {
    color: #CBD5E1;
}

html[data-theme="dark"] .academic-footer a:hover {
    color: #38BDF8;
}

/* ─── Quantum Operating System Expansion CSS ───────────────────────── */
.gap-card, .kcm-card, .lens-card, .annotation-card, .decoherence-card, 
.portfolio-card, .snippet-card, .vault-card, .prize-card, .zk-card {
    background: var(--color-surface, #F8FAFC);
    border: 1px solid var(--color-border, #E2E8F0);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
}

[data-theme="dark"] .gap-card, 
[data-theme="dark"] .kcm-card, 
[data-theme="dark"] .lens-card, 
[data-theme="dark"] .annotation-card, 
[data-theme="dark"] .decoherence-card, 
[data-theme="dark"] .portfolio-card, 
[data-theme="dark"] .snippet-card, 
[data-theme="dark"] .vault-card, 
[data-theme="dark"] .prize-card, 
[data-theme="dark"] .zk-card {
    background: #0F172A;
    border-color: #334155;
    color: #F8FAFC;
}

.annotations-grid, .decoherence-grid, .snippets-grid, .prizes-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 750px) {
    .annotations-grid, .decoherence-grid, .snippets-grid, .prizes-grid {
        grid-template-columns: 1fr;
    }
}

.kcm-node-item {
    background: var(--color-card-bg, #FFFFFF);
    border: 1px solid var(--color-border, #E2E8F0);
    border-radius: 12px;
    padding: 1.25rem;
}

[data-theme="dark"] .kcm-node-item {
    background: #1E293B;
    border-color: #334155;
}

.kcm-step-tag { font-size: 0.7rem; font-weight: 800; color: #10B981; letter-spacing: 0.1em; margin-bottom: 0.35rem; }
.badge-coherent { font-size: 0.75rem; font-weight: 800; color: #10B981; letter-spacing: 0.08em; }
.orcid-badge { font-size: 0.75rem; font-weight: 800; color: #0284C7; }
.framework-tag { font-size: 0.75rem; font-weight: 800; color: #D97706; background: rgba(217,119,6,0.1); padding: 0.2rem 0.6rem; border-radius: 6px; }
.ci-badge { font-size: 0.75rem; font-weight: 800; color: #10B981; }
.prize-year { font-size: 0.75rem; font-weight: 800; color: #F59E0B; letter-spacing: 0.1em; }
.prize-votes { font-size: 0.875rem; color: #10B981; font-weight: 700; margin-top: 0.5rem; }

/* ─── Category-Defining Quantum Operating System Expansion CSS ─────── */
.lattice-card, .audit-card, .snapshot-card, .anomaly-card, .synth-card, 
.verified-badge-card, .decay-card, .mesh-card, .oath-card {
    background: var(--color-surface, #F8FAFC);
    border: 1px solid var(--color-border, #E2E8F0);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
}

[data-theme="dark"] .lattice-card, 
[data-theme="dark"] .audit-card, 
[data-theme="dark"] .snapshot-card, 
[data-theme="dark"] .anomaly-card, 
[data-theme="dark"] .synth-card, 
[data-theme="dark"] .verified-badge-card, 
[data-theme="dark"] .decay-card, 
[data-theme="dark"] .mesh-card, 
[data-theme="dark"] .oath-card {
    background: #0F172A;
    border-color: #334155;
    color: #F8FAFC;
}

.anomalies-grid, .badges-grid, .decay-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 750px) {
    .anomalies-grid, .badges-grid, .decay-grid {
        grid-template-columns: 1fr;
    }
}

.anomaly-qpu { font-size: 0.75rem; font-weight: 800; color: #EF4444; letter-spacing: 0.08em; }
.anom-hypothesis { font-size: 0.875rem; background: var(--color-bg); padding: 0.75rem; border-radius: 8px; margin-top: 0.75rem; }
.badge-tag { font-size: 0.75rem; font-weight: 800; color: #10B981; letter-spacing: 0.08em; }
.badge-hash { font-size: 0.75rem; font-family: monospace; color: #0284C7; margin-top: 0.5rem; }
.half-life-tag { font-size: 0.75rem; font-weight: 800; color: #D97706; letter-spacing: 0.08em; }

/* ─── Permanent Extension of Mind Expansion CSS ─────────────────────── */
.empathy-card, .focus-card, .counter-card, .hashlock-card, .os-issue-card, 
.production-log-card, .mark-card, .roadmap-card {
    background: var(--color-surface, #F8FAFC);
    border: 1px solid var(--color-border, #E2E8F0);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
}

[data-theme="dark"] .empathy-card, 
[data-theme="dark"] .focus-card, 
[data-theme="dark"] .counter-card, 
[data-theme="dark"] .hashlock-card, 
[data-theme="dark"] .os-issue-card, 
[data-theme="dark"] .production-log-card, 
[data-theme="dark"] .mark-card, 
[data-theme="dark"] .roadmap-card {
    background: #0F172A;
    border-color: #334155;
    color: #F8FAFC;
}

.open-source-grid, .logs-grid, .marks-grid, .foundation-roadmap-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 750px) {
    .open-source-grid, .logs-grid, .marks-grid, .foundation-roadmap-grid {
        grid-template-columns: 1fr;
    }
}

.os-repo { font-size: 0.75rem; font-weight: 800; color: #D97706; letter-spacing: 0.08em; }
.os-context { font-size: 0.875rem; margin-top: 0.5rem; }
.os-hint { font-size: 0.875rem; color: #10B981; }
.log-architect { font-size: 0.8125rem; color: #0284C7; }
.log-solution { font-size: 0.875rem; background: var(--color-bg); padding: 0.75rem; border-radius: 8px; margin-top: 0.5rem; }
.stamp-badge { font-size: 0.75rem; font-weight: 800; color: #10B981; }
.mark-hash { font-size: 0.75rem; font-family: monospace; color: #0284C7; margin-top: 0.5rem; }
.status-badge { font-size: 0.75rem; font-weight: 800; color: #38BDF8; background: rgba(56,189,248,0.1); padding: 0.2rem 0.6rem; border-radius: 6px; }

/* ─── Central Nervous System Expansion CSS ──────────────────────────── */
.twin-card, .entangled-card, .commonplace-card, .challenge-card, 
.review-card, .shibboleth-card, .breathe-card {
    background: var(--color-surface, #F8FAFC);
    border: 1px solid var(--color-border, #E2E8F0);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
}

[data-theme="dark"] .twin-card, 
[data-theme="dark"] .entangled-card, 
[data-theme="dark"] .commonplace-card, 
[data-theme="dark"] .challenge-card, 
[data-theme="dark"] .review-card, 
[data-theme="dark"] .shibboleth-card, 
[data-theme="dark"] .breathe-card {
    background: #0F172A;
    border-color: #334155;
    color: #F8FAFC;
}

.negentropy-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 750px) {
    .negentropy-grid {
        grid-template-columns: 1fr;
    }
}

/* ─── Strategic Intelligence & Ecosystem Utility CSS ────────────────── */
.forecast-card, .p2p-card, .drill-card, .poetry-card, .lab-twin-card {
    background: var(--color-surface, #F8FAFC);
    border: 1px solid var(--color-border, #E2E8F0);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
}

[data-theme="dark"] .forecast-card, 
[data-theme="dark"] .p2p-card, 
[data-theme="dark"] .drill-card, 
[data-theme="dark"] .poetry-card, 
[data-theme="dark"] .lab-twin-card {
    background: #0F172A;
    border-color: #334155;
    color: #F8FAFC;
}

/* ─── Monumental Category-Defining CSS ──────────────────────────────── */
.koan-card, .trust-card, .linter-card, .temporal-card, .ambassador-card, 
.proof-card, .antilibrary-card, .draft-open-card, .silence-card {
    background: var(--color-surface, #F8FAFC);
    border: 1px solid var(--color-border, #E2E8F0);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
}

[data-theme="dark"] .koan-card, 
[data-theme="dark"] .trust-card, 
[data-theme="dark"] .linter-card, 
[data-theme="dark"] .temporal-card, 
[data-theme="dark"] .ambassador-card, 
[data-theme="dark"] .proof-card, 
[data-theme="dark"] .antilibrary-card, 
[data-theme="dark"] .draft-open-card, 
[data-theme="dark"] .silence-card {
    background: #0F172A;
    border-color: #334155;
    color: #F8FAFC;
}

/* ─── Undisputed Quantum Cosmos Expansion CSS ──────────────────────── */
.calibration-card {
    background: var(--color-surface, #F8FAFC);
    border: 1px solid var(--color-border, #E2E8F0);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
}

[data-theme="dark"] .calibration-card {
    background: #0F172A;
    border-color: #334155;
    color: #F8FAFC;
}

.sculptor-node {
    transition: opacity 0.3s ease, transform 0.3s ease;
}

/* ─── Article Reactions Bar ───────────────────────────────────── */
.article-reactions-container {
    background: #FFFFFF;
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 1.5rem 1.75rem;
    margin-top: 2.5rem;
    margin-bottom: 2rem;
    text-align: center;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.03);
    transition: background 0.2s ease, border-color 0.2s ease;
}

html[data-theme="dark"] .article-reactions-container,
[data-theme="dark"] .article-reactions-container {
    background: #191919 !important;
    border-color: #2A2A2A !important;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.reactions-heading {
    font-family: var(--font-heading), 'Inter', sans-serif;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-text-secondary);
    margin-bottom: 1.25rem;
    letter-spacing: -0.01em;
}

html[data-theme="dark"] .reactions-heading,
[data-theme="dark"] .reactions-heading {
    color: #A3A3A3 !important;
}

.reactions-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.reaction-btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    font-family: var(--font-body), sans-serif;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-text);
    background: var(--color-bg);
    border: 1.5px solid var(--color-border);
    border-radius: 100px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    user-select: none;
    line-height: 1.2;
}

.reaction-btn:hover {
    border-color: #10B981;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.15);
}

.reaction-icon {
    width: 18px;
    height: 18px;
    stroke-width: 2.2;
    flex-shrink: 0;
    transition: transform 0.2s ease, stroke 0.2s ease;
}

.reaction-btn:hover .reaction-icon {
    transform: scale(1.18);
}

.reaction-label {
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--color-text);
}

.reaction-count {
    font-size: 0.75rem;
    font-weight: 800;
    padding: 0.15rem 0.45rem;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 100px;
    color: var(--color-text-secondary);
    transition: all 0.2s ease;
}

/* Active Reaction State */
.reaction-btn.active {
    background: rgba(16, 185, 129, 0.08) !important;
    border-color: #10B981 !important;
    color: #047857 !important;
    box-shadow: 0 2px 10px rgba(16, 185, 129, 0.2) !important;
}

.reaction-btn.active .reaction-count {
    background: #10B981 !important;
    color: #FFFFFF !important;
}

html[data-theme="dark"] .reaction-btn {
    background: #222222 !important;
    border-color: #333333 !important;
    color: #F3F4F6 !important;
}

html[data-theme="dark"] .reaction-btn .reaction-label {
    color: #F3F4F6 !important;
}

html[data-theme="dark"] .reaction-btn .reaction-count {
    background: #2A2A2A !important;
    color: #9CA3AF !important;
}

html[data-theme="dark"] .reaction-btn:hover {
    border-color: #34D399 !important;
    box-shadow: 0 4px 16px rgba(52, 211, 153, 0.2) !important;
}

html[data-theme="dark"] .reaction-btn.active {
    background: rgba(16, 185, 129, 0.18) !important;
    border-color: #10B981 !important;
    color: #34D399 !important;
}

html[data-theme="dark"] .reaction-btn.active .reaction-count {
    background: #10B981 !important;
    color: #064E3B !important;
}

/* Micro Pop Particle (+1) */
.reaction-pop-particle {
    position: absolute;
    top: -20px;
    right: 10px;
    font-size: 0.75rem;
    font-weight: 900;
    color: #10B981;
    pointer-events: none;
    animation: reactionParticlePop 0.8s ease-out forwards;
}

@keyframes reactionParticlePop {
    0% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
    50% {
        opacity: 1;
        transform: translateY(-16px) scale(1.25);
    }
    100% {
        opacity: 0;
        transform: translateY(-28px) scale(0.9);
    }
}

/* ── Navbar & Hero Layout Overlap Fixes ───────────────────────────── */
.pill-brand-logo-link {
    display: inline-flex !important;
    align-items: center !important;
    flex-shrink: 0 !important;
    margin-right: 0.75rem !important;
    height: 38px !important;
    text-decoration: none !important;
}

.pill-brand-logo-link .pill-brand-logo {
    height: 36px !important;
    width: auto !important;
    max-width: 170px !important;
    object-fit: contain !important;
}

.pill-brand-logo-link .pill-brand-logo.logo-light {
    display: inline-block !important;
}

.pill-brand-logo-link .pill-brand-logo.logo-dark {
    display: none !important;
}

html[data-theme="dark"] .pill-brand-logo-link .pill-brand-logo.logo-light,
[data-theme="dark"] .pill-brand-logo-link .pill-brand-logo.logo-light {
    display: none !important;
}

html[data-theme="dark"] .pill-brand-logo-link .pill-brand-logo.logo-dark,
[data-theme="dark"] .pill-brand-logo-link .pill-brand-logo.logo-dark {
    display: inline-block !important;
}

.academic-nav-list li.nav-dropdown,
.academic-nav-list li {
    position: relative !important;
    flex-shrink: 0 !important;
}

.card-right-group {
    display: flex !important;
    align-items: center !important;
    gap: 0.5rem !important;
    flex-shrink: 0 !important;
    margin-left: 0.5rem !important;
}

.quantum-fan-hero {
    position: relative !important;
    padding: 2.5rem 0 3.5rem 0 !important;
    margin-bottom: 2.5rem !important;
    overflow: visible !important;
}

.fan-stack {
    position: relative !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    min-height: 480px !important;
    margin-bottom: 4rem !important;
    perspective: 1200px !important;
}

.fan-hero-copy {
    position: relative !important;
    z-index: 25 !important;
    max-width: 800px !important;
    margin: 0 auto !important;
    text-align: center !important;
    clear: both !important;
}