/* AItoAIDatasets.com - Main Stylesheet */
/* Generated 2026-06-16 */

/* ============================================================
   RESET + BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

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

a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent-hover); }
a:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 3px; border-radius: 2px; }

img { max-width: 100%; height: auto; display: block; }

ul, ol { list-style: none; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--color-text);
}

pre, code { font-family: var(--font-mono); }

/* ============================================================
   DESIGN TOKEN DEFAULTS (if not injected inline)
   ============================================================ */
:root {
  --color-bg: #0a0e1a;
  --color-surface: #111827;
  --color-surface-raised: #1a2332;
  --color-border: #1e2d45;
  --color-border-subtle: #162038;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-text-dim: #475569;
  --color-accent: #3b82f6;
  --color-accent-hover: #60a5fa;
  --color-accent-cyan: #22d3ee;
  --color-accent-glow: rgba(59,130,246,0.15);
  --font-heading: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'Fira Mono', 'Cascadia Mono', monospace;
  --header-height: 64px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-card: 0 2px 8px rgba(0,0,0,0.4);
  --shadow-card-hover: 0 4px 20px rgba(59,130,246,0.2);
  --transition: 0.2s ease;
}

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-article {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-main { padding: 48px 0 80px; }

/* Two-column article layout */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 48px;
  align-items: start;
}

/* ============================================================
   HEADER + NAV
   ============================================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(10,14,26,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-subtle);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 40px;
}

.header-logo { flex-shrink: 0; }
.header-logo a {
  font-family: var(--font-heading);
  font-weight: 300;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  color: var(--color-text);
  text-decoration: none;
}
.header-logo a:hover { color: var(--color-accent); }
.header-logo a span { color: var(--color-accent); }

.site-nav { flex: 1; }
.nav-list {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-link {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition);
  letter-spacing: 0.01em;
}
.nav-link:hover,
.nav-link.active { color: var(--color-accent); }

.mobile-menu-btn {
  display: none;
  margin-left: auto;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--color-text-muted);
  flex-direction: column;
  gap: 5px;
}
.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  transition: var(--transition);
}

/* Mobile overlay menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  z-index: 99;
  padding: 24px;
}
.mobile-menu.is-open { display: block; }
.mobile-nav-list { display: flex; flex-direction: column; gap: 4px; }
.mobile-nav-link {
  display: block;
  padding: 12px 0;
  font-size: 1.05rem;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border-subtle);
  transition: color var(--transition);
}
.mobile-nav-link:hover { color: var(--color-accent); }
.mobile-menu-footer { margin-top: 24px; }

/* ============================================================
   BREADCRUMBS
   ============================================================ */
.breadcrumb-nav {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border-subtle);
}
.breadcrumb-list {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--color-text-dim);
}
.breadcrumb-list a { color: var(--color-text-muted); }
.breadcrumb-list a:hover { color: var(--color-accent); }
.breadcrumb-sep { color: var(--color-text-dim); }
.breadcrumb-item:last-child { color: var(--color-text-muted); }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 64px 0 32px;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--color-border-subtle);
}
.footer-brand-name {
  font-family: var(--font-heading);
  font-weight: 300;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: 8px;
}
.footer-brand-name span { color: var(--color-accent); }
.footer-tagline {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin-bottom: 20px;
}
.footer-ai-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-dim);
  margin-bottom: 8px;
}
.footer-ai-links { display: flex; flex-direction: column; gap: 4px; }
.footer-ai-links a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-accent-cyan);
  opacity: 0.7;
  transition: opacity var(--transition);
}
.footer-ai-links a:hover { opacity: 1; color: var(--color-accent-cyan); }
.footer-heading {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-dim);
  margin-bottom: 16px;
}
.footer-link-list { display: flex; flex-direction: column; gap: 10px; }
.footer-link {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}
.footer-link:hover { color: var(--color-accent); }
.footer-bottom {
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-copyright { font-size: 0.8rem; color: var(--color-text-dim); }
.footer-bottom-links { display: flex; gap: 20px; }
.footer-bottom-link { font-size: 0.8rem; color: var(--color-text-dim); }
.footer-bottom-link:hover { color: var(--color-text-muted); }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
}
.btn-primary {
  background: var(--color-accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
  box-shadow: 0 0 20px var(--color-accent-glow);
}
.btn-outline {
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}
.btn-outline:hover {
  color: var(--color-text);
  border-color: var(--color-accent);
}
.btn-sm { padding: 8px 16px; font-size: 0.85rem; }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  padding: 80px 0 64px;
  background: radial-gradient(ellipse 80% 60% at 50% -10%, rgba(59,130,246,0.12) 0%, transparent 70%);
  border-bottom: 1px solid var(--color-border-subtle);
}
.hero-inner { max-width: 720px; }
.hero-badge {
  display: inline-block;
  padding: 4px 12px;
  background: var(--color-accent-glow);
  border: 1px solid rgba(59,130,246,0.3);
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--color-accent-cyan);
  margin-bottom: 20px;
}
.hero-headline {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 200;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 20px;
  color: var(--color-text);
}
.hero-subheadline {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  font-weight: 400;
  margin-bottom: 16px;
  line-height: 1.6;
}
.hero-body {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: 32px;
  line-height: 1.7;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ============================================================
   SECTIONS
   ============================================================ */
.home-section { padding: 64px 0; }
.bg-subtle { background: var(--color-surface); }
.section-heading {
  font-size: 1.6rem;
  font-weight: 300;
  letter-spacing: -0.02em;
  margin-bottom: 32px;
  color: var(--color-text);
}
.section-desc {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 640px;
  line-height: 1.7;
  margin-bottom: 40px;
}
.section-cta { margin-top: 32px; }

.section-header { margin-bottom: 48px; }
.section-header .page-title { margin-bottom: 16px; }

/* Phase grid (monetization section) */
.phase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 24px;
}
.phase-item {
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}
.phase-label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent-cyan);
  margin-bottom: 8px;
}
.phase-desc { font-size: 0.875rem; color: var(--color-text-muted); }

/* ============================================================
   CARDS
   ============================================================ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.card-grid-sm { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }

.card {
  display: block;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  text-decoration: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-card-hover);
}
.card-title {
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-text);
  margin-bottom: 8px;
  line-height: 1.4;
}
.card-body {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 12px;
}
.card-link-label {
  font-size: 0.8rem;
  color: var(--color-accent);
  display: block;
  margin-top: 12px;
}

/* ============================================================
   ARTICLE LIST
   ============================================================ */
.article-list { display: flex; flex-direction: column; gap: 0; }
.article-row {
  padding: 28px 0;
  border-bottom: 1px solid var(--color-border-subtle);
}
.article-row:first-child { border-top: 1px solid var(--color-border-subtle); }
.article-row-title {
  font-size: 1.1rem;
  font-weight: 400;
  margin-bottom: 8px;
  line-height: 1.4;
}
.article-row-title a { color: var(--color-text); }
.article-row-title a:hover { color: var(--color-accent); }
.article-row-excerpt {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 8px;
}
.article-row-meta { font-size: 0.8rem; color: var(--color-text-dim); }

/* ============================================================
   ARTICLE DETAIL
   ============================================================ */
.article-header { margin-bottom: 36px; }
.article-category-label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.article-category-label a { color: var(--color-accent-cyan); }
.article-title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 300;
  letter-spacing: -0.025em;
  margin-bottom: 16px;
}
.article-excerpt {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}
.article-meta {
  font-size: 0.82rem;
  color: var(--color-text-dim);
  display: flex;
  align-items: center;
  gap: 8px;
}
.article-meta-sep { color: var(--color-border); }
.article-tags { margin-top: 40px; display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  padding: 4px 10px;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

/* ============================================================
   PROSE (rich text body)
   ============================================================ */
.prose {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text);
}
.prose h2 {
  font-size: 1.5rem;
  font-weight: 300;
  margin: 40px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border-subtle);
}
.prose h3 { font-size: 1.15rem; font-weight: 400; margin: 28px 0 12px; }
.prose h4 { font-size: 1rem; font-weight: 600; margin: 20px 0 8px; color: var(--color-text-muted); }
.prose p { margin-bottom: 20px; }
.prose ul, .prose ol { padding-left: 24px; margin-bottom: 20px; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin-bottom: 8px; }
.prose a { color: var(--color-accent); }
.prose a:hover { color: var(--color-accent-hover); }
.prose strong { font-weight: 600; color: var(--color-text); }
.prose em { font-style: italic; color: var(--color-text-muted); }
.prose code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 2px 6px;
}
.prose pre {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  overflow-x: auto;
  margin-bottom: 24px;
  font-size: 0.875rem;
}
.prose blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: 20px;
  margin: 24px 0;
  color: var(--color-text-muted);
  font-style: italic;
}
.prose table { width: 100%; border-collapse: collapse; margin-bottom: 24px; font-size: 0.9rem; }
.prose th, .prose td { padding: 10px 14px; border: 1px solid var(--color-border); text-align: left; }
.prose th { background: var(--color-surface); color: var(--color-text-muted); font-weight: 600; }

/* ============================================================
   SIDEBAR
   ============================================================ */
.article-sidebar { position: sticky; top: calc(var(--header-height) + 24px); }
.sidebar-block {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 16px;
}
.sidebar-block.sidebar-cta { background: var(--color-accent-glow); border-color: rgba(59,130,246,0.3); }
.sidebar-heading {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-dim);
  margin-bottom: 14px;
}
.sidebar-link-list { display: flex; flex-direction: column; gap: 8px; }
.sidebar-link-list li a {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}
.sidebar-link-list li a:hover { color: var(--color-accent); }
.sidebar-term-def {
  display: block;
  font-size: 0.78rem;
  color: var(--color-text-dim);
  margin-top: 2px;
  line-height: 1.4;
}
.sidebar-plain-link { font-size: 0.875rem; color: var(--color-accent); }
.sidebar-plain-link:hover { color: var(--color-accent-hover); }
.sidebar-block p { font-size: 0.875rem; color: var(--color-text-muted); margin-bottom: 12px; }

/* ============================================================
   PAGE
   ============================================================ */
.page-article { max-width: 720px; }
.page-article-header { margin-bottom: 32px; }
.page-title {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 200;
  letter-spacing: -0.025em;
  color: var(--color-text);
}

/* ============================================================
   LIBRARY
   ============================================================ */
.library-section { margin-bottom: 56px; }
.library-section-heading {
  font-size: 1.3rem;
  font-weight: 300;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border-subtle);
}

/* ============================================================
   GLOSSARY
   ============================================================ */
.glossary-letter-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 40px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border-subtle);
}
.glossary-letter-link {
  display: inline-block;
  width: 32px;
  height: 32px;
  line-height: 32px;
  text-align: center;
  font-size: 0.85rem;
  font-family: var(--font-heading);
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.glossary-letter-link:hover {
  color: #fff;
  background: var(--color-accent);
  border-color: var(--color-accent);
}
.glossary-index { display: flex; flex-direction: column; gap: 40px; }
.glossary-letter-group {}
.glossary-letter-heading {
  font-size: 2rem;
  font-weight: 200;
  color: var(--color-accent);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border-subtle);
}
.glossary-term-list { display: flex; flex-direction: column; gap: 12px; }
.glossary-term-item { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.glossary-term-link {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
}
.glossary-term-link:hover { color: var(--color-accent); }
.glossary-term-preview { font-size: 0.875rem; color: var(--color-text-dim); }
.glossary-short-def {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  margin-bottom: 8px;
  line-height: 1.6;
}
.glossary-aka {
  font-size: 0.875rem;
  color: var(--color-text-dim);
  margin-bottom: 24px;
}
.glossary-example,
.glossary-nuance {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-top: 32px;
}
.glossary-example h2,
.glossary-nuance h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.78rem;
  margin-bottom: 12px;
}

/* ============================================================
   FAQ
   ============================================================ */
.faq-group { margin-bottom: 48px; }
.faq-group-heading {
  font-size: 1.3rem;
  font-weight: 300;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border-subtle);
}
.faq-list { display: flex; flex-direction: column; gap: 0; }
.faq-item {
  border-bottom: 1px solid var(--color-border-subtle);
}
.faq-item:first-child { border-top: 1px solid var(--color-border-subtle); }
.faq-question {
  padding: 20px 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  user-select: none;
}
.faq-question::-webkit-details-marker { display: none; }
.faq-question::after {
  content: '+';
  flex-shrink: 0;
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--color-text-dim);
  transition: transform var(--transition);
}
details[open] .faq-question::after { content: '-'; }
.faq-question:hover { color: var(--color-accent); }
.faq-answer {
  padding: 0 0 24px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 720px;
}
.faq-cta {
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border-subtle);
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

/* ============================================================
   DIRECTORY
   ============================================================ */
.dir-section { margin-bottom: 56px; }
.dir-section-heading {
  font-size: 1.3rem;
  font-weight: 300;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border-subtle);
}
.dir-submit-cta {
  text-align: center;
  padding: 48px 32px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-top: 40px;
}
.dir-submit-cta h2 {
  font-weight: 300;
  margin-bottom: 12px;
}
.dir-submit-cta p {
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

/* Listing list */
.listing-list { display: flex; flex-direction: column; gap: 0; }
.listing-row {
  padding: 24px 0;
  border-bottom: 1px solid var(--color-border-subtle);
}
.listing-row:first-child { border-top: 1px solid var(--color-border-subtle); }
.listing-row-title {
  font-size: 1.05rem;
  font-weight: 400;
  margin-bottom: 6px;
}
.listing-row-title a { color: var(--color-text); }
.listing-row-title a:hover { color: var(--color-accent); }
.listing-row-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 8px;
}
.listing-row-meta { display: flex; flex-wrap: wrap; gap: 6px; }
.listing-badges { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.listing-badge {
  display: inline-block;
  padding: 3px 8px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  border: 1px solid;
}
.listing-badge-blue { color: var(--color-accent); border-color: rgba(59,130,246,0.4); background: var(--color-accent-glow); }
.listing-badge-gray { color: var(--color-text-dim); border-color: var(--color-border); background: var(--color-surface); }
.listing-badge:not(.listing-badge-blue):not(.listing-badge-gray) {
  color: var(--color-accent-cyan);
  border-color: rgba(34,211,238,0.3);
  background: rgba(34,211,238,0.08);
}

/* Dataset schema fields table */
.listing-schema-section { margin-top: 40px; }
.listing-schema-section h2 {
  font-size: 1.1rem;
  font-weight: 400;
  margin-bottom: 16px;
  color: var(--color-text-muted);
}
.schema-field-table { display: flex; flex-direction: column; border: 1px solid var(--color-border); border-radius: var(--radius-md); overflow: hidden; }
.schema-field-row {
  display: grid;
  grid-template-columns: 160px 100px 1fr 70px;
  gap: 0;
  border-bottom: 1px solid var(--color-border-subtle);
}
.schema-field-row:last-child { border-bottom: none; }
.schema-field-row > * { padding: 10px 14px; font-size: 0.85rem; }
.schema-field-header {
  background: var(--color-surface);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-dim);
}
.schema-field-name { font-family: var(--font-mono); font-size: 0.8rem; color: var(--color-accent-cyan); }
.schema-field-type { font-family: var(--font-mono); font-size: 0.78rem; color: var(--color-text-dim); }
.schema-field-desc { color: var(--color-text-muted); }
.schema-field-req { color: var(--color-accent); font-size: 0.78rem; }
.listing-field-list {
  list-style: disc;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}
.listing-sample-json {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  font-size: 0.8rem;
  overflow-x: auto;
  color: var(--color-accent-cyan);
  line-height: 1.6;
}
.listing-meta-list {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 16px;
  font-size: 0.875rem;
  margin-bottom: 16px;
}
.listing-meta-list dt { color: var(--color-text-dim); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; }
.listing-meta-list dd { color: var(--color-text); }

/* ============================================================
   ERROR PAGE
   ============================================================ */
.error-page {
  text-align: center;
  padding: 80px 24px;
  max-width: 560px;
  margin: 0 auto;
}
.error-code {
  font-family: var(--font-heading);
  font-size: 6rem;
  font-weight: 200;
  letter-spacing: -0.04em;
  color: var(--color-border);
  line-height: 1;
  margin-bottom: 16px;
}
.error-message {
  font-size: 2rem;
  font-weight: 300;
  margin-bottom: 16px;
}
.error-body {
  color: var(--color-text-muted);
  margin-bottom: 32px;
  line-height: 1.6;
}
.error-actions { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }

/* ============================================================
   MISC
   ============================================================ */
.empty-state {
  padding: 40px 0;
  color: var(--color-text-dim);
  font-size: 0.95rem;
}
.mb-8 { margin-bottom: 32px; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .schema-field-row { grid-template-columns: 130px 80px 1fr 60px; }
}

@media (max-width: 640px) {
  .site-nav { display: none; }
  .mobile-menu-btn { display: flex; }
  .hero { padding: 48px 0 40px; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .card-grid { grid-template-columns: 1fr; }
  .schema-field-row { grid-template-columns: 1fr 1fr; }
  .schema-field-desc, .schema-field-req { display: none; }
  .container { padding: 0 16px; }
}