/* ============================================
   GEOPOL.UK - Modern Design System
   Inspired by Inversa: restraint, space, clarity
   ============================================ */

/* CSS Custom Properties */
:root {
    /* Colors - Warm, restrained palette */
    --color-bg: #F5F4EF;
    --color-bg-elevated: #FFFFFF;
    --color-bg-subtle: #ECEAE4;
    --color-text: #1a1a1a;
    --color-text-secondary: #52525b;
    --color-text-muted: #a1a1aa;
    --color-border: rgba(0, 0, 0, 0.06);
    --color-accent: #0057ff;
    --color-accent-hover: #0046cc;
    --color-accent-subtle: rgba(0, 87, 255, 0.08);

    /* Shadows - Soft, layered */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 2px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.12);

    /* Typography */
    --font-display: 'Space Grotesk', -apple-system, sans-serif;
    --font-body: 'DM Sans', -apple-system, sans-serif;

    /* Type Scale - More dramatic */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.625rem;
    --text-3xl: 2.25rem;
    --text-4xl: 3rem;
    --text-5xl: 4rem;
    --text-6xl: 5rem;
    --text-7xl: 6.5rem;

    /* Spacing - Generous */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    --space-32: 8rem;

    /* Layout */
    --max-width: 1280px;
    --content-width: 680px;

    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Transitions */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --duration-fast: 150ms;
    --duration-normal: 300ms;
}

/* Reading progress bar */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 4px;
    background: var(--color-accent);
    z-index: 1000;
    width: 0;
    transition: width 100ms ease-out;
    pointer-events: none;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    min-height: 100vh;
}

main {
    flex: 1;
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -100px;
    left: var(--space-4);
    background: var(--color-accent);
    color: white;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-sm);
    z-index: 1000;
    font-weight: 500;
    text-decoration: none;
    transition: top var(--duration-fast) var(--ease-out);
}

.skip-link:focus {
    top: var(--space-4);
}

/* ============================================
   Header - Clean, minimal
   ============================================ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-bg);
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-5) var(--space-6);
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.site-logo {
    text-decoration: none;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: var(--text-lg);
    letter-spacing: -0.03em;
    color: var(--color-text);
    display: flex;
    align-items: baseline;
    gap: 0;
}

.logo-text {
    color: var(--color-text);
}

.logo-tld {
    color: var(--color-accent);
}

.main-nav {
    flex: 1;
}

.nav-list {
    display: flex;
    gap: var(--space-1);
    list-style: none;
}

.nav-list a {
    display: block;
    padding: var(--space-2) var(--space-4);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--text-sm);
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: color var(--duration-fast), background var(--duration-fast);
}

.nav-list a:hover {
    color: var(--color-text);
    background: var(--color-bg-subtle);
}

.search-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--color-bg-elevated);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--color-text-secondary);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--duration-fast), color var(--duration-fast);
}

.search-toggle:hover {
    box-shadow: var(--shadow-md);
    color: var(--color-text);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    padding: var(--space-2);
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--color-text);
    border-radius: 1px;
}

@media (max-width: 768px) {
    .main-nav { display: none; }
    .nav-toggle { display: flex; }
    .header-inner { padding: var(--space-4); }
}

/* Theme toggle button */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--color-bg-elevated);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--color-text-secondary);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--duration-fast), color var(--duration-fast);
}

.theme-toggle:hover {
    box-shadow: var(--shadow-md);
    color: var(--color-text);
}

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

[data-theme="light"] .theme-toggle .icon-moon,
:root:not([data-theme]) .theme-toggle .icon-moon {
    display: block;
}

[data-theme="dark"] .theme-toggle .icon-sun {
    display: block;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) .theme-toggle .icon-moon {
        display: none;
    }
    :root:not([data-theme]) .theme-toggle .icon-sun {
        display: block;
    }
}

/* Search shortcut indicator */
.search-toggle {
    position: relative;
}

.search-shortcut {
    position: absolute;
    bottom: -6px;
    right: -6px;
    font-size: 9px;
    font-family: var(--font-display);
    font-weight: 600;
    color: var(--color-text-muted);
    background: var(--color-bg);
    padding: 2px 4px;
    border-radius: 4px;
    border: 1px solid var(--color-border);
}

/* Hero visual element */
.hero {
    position: relative;
    overflow: hidden;
}

.hero-visual {
    position: absolute;
    top: 50%;
    right: 5%;
    transform: translateY(-50%);
    pointer-events: none;
    opacity: 0.08;
}

.hero-globe {
    width: 500px;
    height: 500px;
    border-radius: 50%;
    border: 2px solid var(--color-text);
    position: relative;
    animation: globe-rotate 60s linear infinite;
}

.hero-globe::before,
.hero-globe::after {
    content: '';
    position: absolute;
    border: 1px solid var(--color-text);
    border-radius: 50%;
}

.hero-globe::before {
    width: 100%;
    height: 60%;
    top: 20%;
    left: 0;
}

.hero-globe::after {
    width: 60%;
    height: 100%;
    top: 0;
    left: 20%;
}

@keyframes globe-rotate {
    from { transform: translateY(-50%) rotate(0deg); }
    to { transform: translateY(-50%) rotate(360deg); }
}

@media (max-width: 1024px) {
    .hero-visual {
        display: none;
    }
}

/* Section header improvements */
.section-header {
    margin-bottom: var(--space-10);
}

.section-header .section-intro {
    margin-bottom: 0;
}

/* Category icons */
.category-icon {
    display: block;
    font-size: var(--text-2xl);
    margin-bottom: var(--space-3);
    filter: grayscale(100%);
    opacity: 0.7;
    transition: filter var(--duration-fast), opacity var(--duration-fast);
}

.category-card:hover .category-icon {
    filter: grayscale(0%);
    opacity: 1;
}

/* Category description */
.category-description {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    max-width: 640px;
    line-height: 1.6;
    margin-top: var(--space-4);
    margin-bottom: var(--space-2);
}

/* Mobile TOC */
.mobile-toc-container {
    display: none;
    position: sticky;
    top: 70px;
    z-index: 50;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-3) var(--space-6);
}

@media (max-width: 1100px) {
    .mobile-toc-container {
        display: block;
    }
}

.mobile-toc-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-display);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: border-color var(--duration-fast);
}

.mobile-toc-toggle:hover {
    border-color: var(--color-text-muted);
}

.mobile-toc-toggle svg {
    transition: transform var(--duration-fast);
}

.mobile-toc-toggle[aria-expanded="true"] svg {
    transform: rotate(180deg);
}

.mobile-toc {
    display: none;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-top: none;
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    padding: var(--space-4);
    margin-top: -1px;
}

.mobile-toc.active {
    display: block;
}

.mobile-toc ul {
    list-style: none;
}

.mobile-toc li {
    margin-bottom: var(--space-2);
}

.mobile-toc a {
    display: block;
    padding: var(--space-2) var(--space-3);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--text-sm);
    border-radius: var(--radius-sm);
    transition: background var(--duration-fast), color var(--duration-fast);
}

.mobile-toc a:hover {
    background: var(--color-bg-subtle);
    color: var(--color-text);
}

/* Reading progress text */
.reading-progress-text {
    font-variant-numeric: tabular-nums;
}

/* Search result snippet */
.search-result-snippet {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-1);
    line-height: 1.5;
}

.search-result-snippet mark {
    background: var(--color-accent-subtle);
    color: var(--color-accent);
    padding: 0 2px;
    border-radius: 2px;
}

/* Lead paragraph styling */
.prose .lead {
    font-size: var(--text-xl);
    color: var(--color-text);
    line-height: 1.5;
    margin-bottom: var(--space-6);
}

/* ============================================
   Hero - Dramatic, spacious
   ============================================ */
.hero {
    padding: var(--space-24) 0 var(--space-20);
}

.hero-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-6);
    text-align: left;
}

.hero-title,
.hero-subtitle {
    max-width: 600px;
}

.hero-eyebrow {
    font-family: var(--font-display);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-accent);
    margin-bottom: var(--space-6);
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(var(--text-4xl), 8vw, var(--text-6xl));
    font-weight: 600;
    line-height: 1.05;
    letter-spacing: -0.035em;
    margin-bottom: var(--space-8);
    color: var(--color-text);
}

.hero-subtitle {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    max-width: 540px;
    line-height: 1.6;
    margin-bottom: var(--space-8);
}

.hero-actions {
    display: flex;
    gap: var(--space-4);
    align-items: center;
    flex-wrap: wrap;
}

.hero-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-display);
    font-size: var(--text-sm);
    font-weight: 500;
    text-decoration: none;
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-sm);
    transition: all var(--duration-fast) var(--ease-out);
}

.hero-btn.primary {
    background: var(--color-text);
    color: var(--color-bg);
}

.hero-btn.primary:hover {
    background: var(--color-text-secondary);
}

.hero-btn.secondary {
    color: var(--color-text-secondary);
    padding-left: 0;
    padding-right: 0;
}

.hero-btn.secondary:hover {
    color: var(--color-text);
}

.hero-btn.secondary span {
    transition: transform var(--duration-fast) var(--ease-out);
}

.hero-btn.secondary:hover span {
    transform: translateX(3px);
}

/* ============================================
   Sections
   ============================================ */
.section {
    padding: var(--space-20) 0;
}

.section-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.section-inner.narrow {
    max-width: var(--content-width);
}

.section-title {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 600;
    letter-spacing: -0.025em;
    margin-bottom: var(--space-4);
}

.section-intro {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-10);
    font-size: var(--text-lg);
}

/* ============================================
   Cards - Bento grid layout
   ============================================ */
.featured-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--space-5);
}

.featured-card {
    background: var(--color-bg-elevated);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    overflow: hidden;
    transition: border-color var(--duration-normal) var(--ease-out), transform var(--duration-normal) var(--ease-out);
    grid-column: span 4;
}

.featured-card:first-child {
    grid-column: span 8;
    grid-row: span 2;
}

.featured-card:first-child .card-link {
    padding: var(--space-12);
}

.featured-card:first-child .card-title {
    font-size: var(--text-3xl);
}

.featured-card:first-child .card-summary {
    font-size: var(--text-base);
}

.featured-card:hover {
    border-color: var(--color-text-muted);
    transform: translateY(-2px);
}

@media (max-width: 1024px) {
    .featured-grid {
        grid-template-columns: repeat(6, 1fr);
    }
    .featured-card {
        grid-column: span 3;
    }
    .featured-card:first-child {
        grid-column: span 6;
        grid-row: span 1;
    }
}

@media (max-width: 640px) {
    .featured-grid {
        grid-template-columns: 1fr;
    }
    .featured-card,
    .featured-card:first-child {
        grid-column: span 1;
        grid-row: span 1;
    }
    .featured-card:first-child .card-link {
        padding: var(--space-8);
    }
    .featured-card:first-child .card-title {
        font-size: var(--text-xl);
    }
}

.card-link {
    display: block;
    padding: var(--space-8);
    text-decoration: none;
    color: inherit;
}

.card-category {
    display: inline-block;
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-accent);
    margin-bottom: var(--space-4);
}

.card-title {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 600;
    line-height: 1.25;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-2);
}

.card-subtitle {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    font-style: italic;
    margin-bottom: var(--space-3);
}

.card-summary {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-4);
}

.card-meta {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    font-weight: 500;
}

/* Article Grid */
.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-6);
}

.article-card {
    padding-bottom: var(--space-6);
}

.article-card .card-link {
    padding: 0;
}

.article-card .card-title {
    font-size: var(--text-lg);
}

/* Category Grid */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-4);
}

.category-card {
    display: block;
    padding: var(--space-6) var(--space-8);
    background: var(--color-bg-elevated);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    text-decoration: none;
    color: inherit;
    transition: box-shadow var(--duration-normal) var(--ease-out), transform var(--duration-normal) var(--ease-out);
}

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

.category-name {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: var(--space-1);
}

.category-count {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

/* Category-specific colors */
.category-card[href*="chokepoints"],
[data-category="chokepoints"] {
    --category-accent: #dc2626;
}

.category-card[href*="concepts"],
[data-category="concepts"] {
    --category-accent: #0057ff;
}

.category-card[href*="powers"],
[data-category="powers"] {
    --category-accent: #7c3aed;
}

.category-card[href*="regions"],
[data-category="regions"] {
    --category-accent: #059669;
}

.category-card[href*="thinkers"],
[data-category="thinkers"] {
    --category-accent: #d97706;
}

.category-card[href*="historical"],
[data-category="historical"] {
    --category-accent: #78716c;
}

.category-card[href*="institutions"],
[data-category="institutions"] {
    --category-accent: #0891b2;
}

.category-card {
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--category-accent, var(--color-accent));
}

/* Category header with accent */
.category-header[data-category] {
    border-bottom: 3px solid var(--category-accent, var(--color-accent));
}

/* About Section */
.about-section {
    background: var(--color-bg-subtle);
    margin: var(--space-16) 0 0;
    padding: var(--space-20) 0;
}

/* ============================================
   Article Page
   ============================================ */
.article-header {
    padding: var(--space-16) 0 var(--space-12);
}

.article-header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.breadcrumb ol {
    display: flex;
    gap: var(--space-2);
    list-style: none;
    font-size: var(--text-sm);
    margin-bottom: var(--space-8);
}

.breadcrumb li:not(:last-child)::after {
    content: '/';
    margin-left: var(--space-2);
    color: var(--color-text-muted);
}

.breadcrumb a {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color var(--duration-fast);
}

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

.article-title {
    font-family: var(--font-display);
    font-size: clamp(var(--text-3xl), 7vw, var(--text-5xl));
    font-weight: 600;
    line-height: 1.08;
    letter-spacing: -0.035em;
    margin-bottom: var(--space-5);
    max-width: 900px;
}

.article-subtitle {
    font-size: var(--text-xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
    max-width: 700px;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.meta-item.tags {
    display: flex;
    gap: var(--space-2);
}

.tag {
    background: var(--color-accent-subtle);
    color: var(--color-accent);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-weight: 500;
}

/* Article Layout - Asymmetric with right margin */
.article-layout {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-12) var(--space-6) var(--space-20);
    display: grid;
    grid-template-columns: minmax(200px, 240px) minmax(0, 620px) 1fr;
    gap: var(--space-10);
}

.article-toc {
    position: sticky;
    top: 100px;
    align-self: start;
    max-height: calc(100vh - 140px);
    overflow-y: auto;
    justify-self: end;
}

.toc {
    padding-right: var(--space-6);
}

.toc-title {
    font-family: var(--font-display);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-4);
}

.toc ul {
    list-style: none;
}

.toc li {
    margin-bottom: var(--space-2);
}

.toc a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: var(--text-sm);
    line-height: 1.5;
    display: block;
    transition: color var(--duration-fast);
}

.toc a:hover,
.toc a.active {
    color: var(--color-text);
}

.toc ul ul {
    margin-left: var(--space-4);
    margin-top: var(--space-2);
}

.article-content {
    grid-column: 2;
    min-width: 0;
    max-width: 620px;
}

@media (max-width: 1100px) {
    .article-layout {
        grid-template-columns: 1fr;
        padding-left: var(--space-6);
        padding-right: var(--space-6);
    }
    .article-content {
        max-width: 100%;
    }
    .article-toc {
        display: none;
    }
}

@media (min-width: 1101px) {
    .article-layout {
        padding-left: var(--space-12);
        padding-right: 20%;
    }
}

/* ============================================
   Prose - Article content
   ============================================ */
.prose {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: 1.65;
    color: var(--color-text);
}

.prose > * + * {
    margin-top: 1.15em;
}

.prose h2 {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 600;
    line-height: 1.25;
    letter-spacing: -0.02em;
    margin-top: 2em;
    margin-bottom: 0.6em;
    color: var(--color-text);
}

.prose h3 {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -0.01em;
    margin-top: 1.6em;
    margin-bottom: 0.4em;
}

.prose h4 {
    font-family: var(--font-display);
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 1.4em;
    margin-bottom: 0.4em;
    color: var(--color-text-secondary);
}

.prose p {
    margin-bottom: 1.1em;
}

.prose a {
    color: var(--color-accent);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
    text-decoration-color: var(--color-accent-subtle);
    transition: text-decoration-color var(--duration-fast);
}

.prose a:hover {
    text-decoration-color: var(--color-accent);
}

.prose a.internal-link {
    text-decoration-style: solid;
}

.prose .broken-link {
    color: var(--color-text-muted);
    text-decoration: line-through;
}

.prose strong {
    font-weight: 600;
}

.prose blockquote {
    border-left: 3px solid var(--color-accent);
    padding-left: var(--space-5);
    margin: var(--space-5) 0;
    font-style: italic;
    color: var(--color-text-secondary);
}

.prose ul,
.prose ol {
    padding-left: 1.25em;
}

.prose li {
    margin-bottom: 0.35em;
}

.prose hr {
    border: none;
    height: 1px;
    background: var(--color-border);
    margin: var(--space-8) 0;
}

.prose code {
    font-family: 'SF Mono', Monaco, 'Consolas', monospace;
    font-size: 0.875em;
    background: var(--color-bg-subtle);
    padding: 0.2em 0.4em;
    border-radius: var(--radius-sm);
}

.prose pre {
    background: var(--color-bg-subtle);
    padding: var(--space-4);
    border-radius: var(--radius-sm);
    overflow-x: auto;
    margin: var(--space-5) 0;
    font-size: var(--text-sm);
}

.prose pre code {
    background: none;
    padding: 0;
}

.prose table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--text-sm);
    margin: var(--space-5) 0;
}

.prose th,
.prose td {
    padding: var(--space-2) var(--space-3);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.prose th {
    font-weight: 600;
    color: var(--color-text-secondary);
    font-size: var(--text-xs);
}

/* Permalinks */
.prose .headerlink {
    color: var(--color-text-muted);
    text-decoration: none;
    margin-left: var(--space-2);
    opacity: 0;
    transition: opacity var(--duration-fast);
}

.prose h2:hover .headerlink,
.prose h3:hover .headerlink {
    opacity: 1;
}

/* Pull quotes */
.prose .pullquote,
.prose blockquote.pullquote {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 500;
    font-style: normal;
    color: var(--color-accent);
    border-left: 4px solid var(--color-accent);
    padding: var(--space-6) 0 var(--space-6) var(--space-8);
    margin: var(--space-12) 0;
    background: var(--color-accent-subtle);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

/* Full-bleed images in articles */
.prose .full-bleed {
    width: 100vw;
    position: relative;
    left: 50%;
    right: 50%;
    margin-left: -50vw;
    margin-right: -50vw;
    margin-top: var(--space-10);
    margin-bottom: var(--space-10);
}

.prose .full-bleed img {
    width: 100%;
    height: auto;
}

/* ============================================
   Article Footer
   ============================================ */
.article-footer {
    background: var(--color-bg-subtle);
}

.article-footer-inner {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: var(--space-16) var(--space-6);
}

.backlinks,
.related-articles {
    margin-bottom: var(--space-12);
}

.backlinks:last-child,
.related-articles:last-child {
    margin-bottom: 0;
}

.backlinks h2,
.related-articles h2 {
    font-family: var(--font-display);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-6);
}

.link-list {
    list-style: none;
}

.link-list li {
    border-bottom: 1px solid var(--color-border);
}

.link-list a {
    display: block;
    padding: var(--space-4) 0;
    text-decoration: none;
    color: inherit;
    transition: color var(--duration-fast);
}

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

.link-list strong {
    display: block;
    font-family: var(--font-display);
    font-weight: 500;
    margin-bottom: var(--space-1);
}

.link-list span {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-4);
}

.related-card {
    display: block;
    padding: var(--space-5) var(--space-6);
    background: var(--color-bg-elevated);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    text-decoration: none;
    color: inherit;
    transition: box-shadow var(--duration-normal) var(--ease-out), transform var(--duration-normal) var(--ease-out);
}

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

.related-category {
    display: block;
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-accent);
    margin-bottom: var(--space-2);
    font-weight: 600;
}

.related-title {
    font-family: var(--font-display);
    font-size: var(--text-base);
    font-weight: 500;
}

/* ============================================
   Category Page
   ============================================ */
.category-header {
    padding: var(--space-16) 0 var(--space-8);
}

.category-header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.category-title {
    font-family: var(--font-display);
    font-size: clamp(var(--text-3xl), 5vw, var(--text-5xl));
    font-weight: 600;
    letter-spacing: -0.03em;
}

.category-count {
    color: var(--color-text-muted);
    margin-top: var(--space-2);
    font-size: var(--text-lg);
}

.category-content {
    padding: var(--space-12) 0 var(--space-20);
}

.category-content-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.article-group {
    margin-bottom: var(--space-12);
}

.group-title {
    font-family: var(--font-display);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-6);
}

.group-subtitle {
    font-weight: 400;
    text-transform: none;
    letter-spacing: normal;
    opacity: 0.7;
}

.article-list {
    display: grid;
    gap: var(--space-4);
}

.list-article {
    padding: var(--space-6) var(--space-8);
    background: var(--color-bg-elevated);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    transition: border-color var(--duration-normal) var(--ease-out), transform var(--duration-normal) var(--ease-out);
}

.list-article:hover {
    border-color: var(--color-text-muted);
    transform: translateY(-2px);
}

.list-article.foundational {
    position: relative;
}

.list-article.foundational::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--color-accent);
    border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.list-article a {
    text-decoration: none;
    color: inherit;
}

.list-title {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: var(--space-2);
}

.list-subtitle {
    font-style: italic;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2);
}

.list-summary {
    color: var(--color-text-secondary);
    font-size: var(--text-base);
    margin-bottom: var(--space-3);
    line-height: 1.6;
}

.list-meta {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    font-weight: 500;
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
    background: var(--color-bg-subtle);
    margin-top: auto;
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-16) var(--space-6);
}

.footer-brand {
    margin-bottom: var(--space-10);
}

.footer-logo {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: var(--text-lg);
    letter-spacing: -0.02em;
}

.footer-tagline {
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    margin-top: var(--space-1);
}

.footer-nav {
    display: flex;
    gap: var(--space-16);
    margin-bottom: var(--space-12);
}

.footer-section h4 {
    font-family: var(--font-display);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-4);
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: var(--space-2);
}

.footer-section a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--text-sm);
    transition: color var(--duration-fast);
}

.footer-section a:hover {
    color: var(--color-text);
}

.footer-bottom {
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

/* ============================================
   Search Modal
   ============================================ */
.search-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 200;
    display: none;
    align-items: flex-start;
    justify-content: center;
    padding-top: 12vh;
}

.search-modal.active {
    display: flex;
}

.search-modal-inner {
    background: var(--color-bg-elevated);
    width: 100%;
    max-width: 580px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    position: relative;
    margin: 0 var(--space-4);
}

.search-close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    background: none;
    border: none;
    font-size: var(--text-2xl);
    cursor: pointer;
    color: var(--color-text-muted);
    line-height: 1;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: background var(--duration-fast);
}

.search-close:hover {
    background: var(--color-bg-subtle);
}

.search-input {
    width: 100%;
    padding: var(--space-6) var(--space-8);
    border: none;
    font-size: var(--text-lg);
    font-family: var(--font-body);
    background: transparent;
    color: var(--color-text);
}

.search-input:focus {
    outline: none;
}

.search-input::placeholder {
    color: var(--color-text-muted);
}

.search-results {
    max-height: 400px;
    overflow-y: auto;
    border-top: 1px solid var(--color-border);
}

.search-result {
    display: block;
    padding: var(--space-4) var(--space-8);
    text-decoration: none;
    color: inherit;
    transition: background var(--duration-fast);
}

.search-result:hover {
    background: var(--color-bg-subtle);
}

.search-result-title {
    font-family: var(--font-display);
    font-weight: 500;
    margin-bottom: var(--space-1);
}

.search-result-title mark {
    background: var(--color-accent-subtle);
    color: var(--color-accent);
    padding: 0 2px;
    border-radius: 2px;
}

.search-result-category {
    font-size: var(--text-xs);
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.search-no-results {
    padding: var(--space-12) var(--space-8);
    text-align: center;
    color: var(--color-text-muted);
}

/* ============================================
   Utilities
   ============================================ */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* ============================================
   Dark Mode
   ============================================ */
@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #0f0f0f;
        --color-bg-elevated: #1a1a1a;
        --color-bg-subtle: #252525;
        --color-text: #f0f0f0;
        --color-text-secondary: #a0a0a0;
        --color-text-muted: #6b6b6b;
        --color-border: rgba(255, 255, 255, 0.1);
        --color-accent: #3b82f6;
        --color-accent-hover: #60a5fa;
        --color-accent-subtle: rgba(59, 130, 246, 0.15);

        --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
        --shadow-md: 0 2px 12px rgba(0, 0, 0, 0.4);
        --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.5);
        --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.6);
    }

    .search-modal {
        background: rgba(0, 0, 0, 0.8);
    }
}

/* Manual dark mode toggle support */
[data-theme="dark"] {
    --color-bg: #0f0f0f;
    --color-bg-elevated: #1a1a1a;
    --color-bg-subtle: #252525;
    --color-text: #f0f0f0;
    --color-text-secondary: #a0a0a0;
    --color-text-muted: #6b6b6b;
    --color-border: rgba(255, 255, 255, 0.1);
    --color-accent: #3b82f6;
    --color-accent-hover: #60a5fa;
    --color-accent-subtle: rgba(59, 130, 246, 0.15);

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 2px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.6);
}

[data-theme="dark"] .search-modal {
    background: rgba(0, 0, 0, 0.8);
}

/* Manual light mode toggle support - overrides prefers-color-scheme: dark */
[data-theme="light"] {
    --color-bg: #F5F4EF;
    --color-bg-elevated: #FFFFFF;
    --color-bg-subtle: #ECEAE4;
    --color-text: #1a1a1a;
    --color-text-secondary: #52525b;
    --color-text-muted: #a1a1aa;
    --color-border: rgba(0, 0, 0, 0.06);
    --color-accent: #0057ff;
    --color-accent-hover: #0046cc;
    --color-accent-subtle: rgba(0, 87, 255, 0.08);

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 2px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.12);
}

[data-theme="light"] .search-modal {
    background: rgba(0, 0, 0, 0.6);
}

/* ============================================
   Print
   ============================================ */
@media print {
    .site-header,
    .site-footer,
    .article-toc,
    .article-footer,
    .search-modal {
        display: none !important;
    }

    body {
        background: white;
    }

    .article-layout {
        display: block;
    }

    .prose {
        font-size: 11pt;
    }
}