/* Language Lineage — Static SEO Pages */
:root {
  --bg: #0a0a0b;
  --bg-surface: #141416;
  --bg-card: #1a1a1d;
  --text: #f5f0e8;
  --text-secondary: #9a958c;
  --text-tertiary: #5a564f;
  --accent: #c9a87c;
  --accent-hover: #dfc4a0;
  --border: rgba(245, 240, 232, 0.08);
  --highlight: #e07a5f;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { font-size: 16px; }

body {
  font-family: 'DM Sans', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }

/* Nav */
.seo-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 40px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-surface);
  position: sticky;
  top: 0;
  z-index: 10;
  height: 52px;
  overflow-x: auto;
}

.seo-nav a {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 10px;
  border-radius: 6px;
  white-space: nowrap;
  transition: color 0.15s, background 0.15s;
}

.seo-nav a.nav-brand {
  font-weight: 700;
  color: var(--text);
  font-size: 14px;
  margin-right: 8px;
  padding-left: 0;
}

.seo-nav a:hover { color: var(--accent); text-decoration: none; background: rgba(201,168,124,0.07); }

/* Main layout */
.seo-main {
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 40px 80px;
}

/* Breadcrumb */
.breadcrumb {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 6px;
}

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

/* Headings */
h1 {
  font-family: Georgia, 'Times New Roman', serif;
  font-size: 40px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text);
  margin-bottom: 24px;
  letter-spacing: -0.5px;
}

h2 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  margin: 40px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-secondary);
  margin: 24px 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 11px;
}

p {
  margin-bottom: 16px;
  color: var(--text-secondary);
  font-size: 16px;
}

/* Answer box — the featured snippet target */
.answer-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  padding: 20px 24px;
  margin-bottom: 40px;
  font-size: 17px;
  color: var(--text);
  line-height: 1.65;
}

.answer-box strong { color: var(--accent); }

/* Meta row (year, paradigm, typing) */
.node-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.meta-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 9999px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
}

.meta-tag-label {
  color: var(--text-tertiary);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin-bottom: 8px;
}

thead th {
  text-align: left;
  padding: 8px 12px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  border-bottom: 1px solid var(--border);
}

tbody td {
  padding: 12px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
  vertical-align: top;
}

tbody tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: var(--bg-card); }

td a { color: var(--accent); }

.confidence-high { color: #7da88a; }
.confidence-mid { color: var(--accent); }
.confidence-low { color: var(--highlight); }

/* FAQ */
.faq-item {
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

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

.faq-question {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.faq-answer {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* Related list */
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 8px;
  margin-top: 4px;
}

.related-card {
  display: block;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: border-color 0.15s, color 0.15s;
}

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

/* Explore CTA */
.explore-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 48px;
  padding: 14px 28px;
  background: var(--accent);
  color: #0a0a0b;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  transition: background 0.2s;
}

.explore-btn:hover {
  background: var(--accent-hover);
  color: #0a0a0b;
  text-decoration: none;
}

/* Source links */
.source-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.source-list li a {
  font-size: 13px;
  word-break: break-all;
}

/* Footer */
.seo-footer {
  border-top: 1px solid var(--border);
  padding: 32px 40px;
  font-size: 13px;
  color: var(--text-tertiary);
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.seo-footer a { color: var(--text-tertiary); }
.seo-footer a:hover { color: var(--accent); }
.seo-footer-copy { color: var(--text-tertiary); margin-left: auto; }

/* Dataset page */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  text-align: center;
}

.stat-number {
  font-size: 32px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  display: block;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 12px;
  color: var(--text-tertiary);
}

/* Code / citation */
pre, code {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 13px;
}

pre {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px 20px;
  overflow-x: auto;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

/* Featured languages grid (languages index page) */
.featured-langs {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 10px;
  margin-bottom: 40px;
}

.featured-lang-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  padding: 16px 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  text-align: center;
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
}

.featured-lang-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 16px rgba(201, 168, 124, 0.1);
  transform: translateY(-2px);
  text-decoration: none;
}

.featured-lang-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.featured-lang-year {
  font-size: 11px;
  color: var(--text-tertiary);
  font-family: 'JetBrains Mono', monospace;
}

/* Tool index cards */
.tool-index-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
  margin-bottom: 40px;
}

.tool-index-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  transition: border-color 0.15s;
}

.tool-index-card:hover {
  border-color: var(--accent);
  text-decoration: none;
}

.tool-index-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.tool-index-note {
  font-size: 12px;
  color: var(--text-tertiary);
  line-height: 1.4;
}

/* Guide cards (guides index page) */
.guide-cards {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 40px;
}

.guide-card {
  display: block;
  padding: 20px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid transparent;
  border-radius: 10px;
  text-decoration: none;
  transition: border-color 0.15s, border-left-color 0.15s;
}

.guide-card:hover {
  border-color: var(--border);
  border-left-color: var(--accent);
  text-decoration: none;
}

.guide-card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.guide-card-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.55;
  margin: 0;
}

/* Relationship type cards */
.rel-cards {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 40px;
}

.rel-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 18px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  transition: border-color 0.15s;
}

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

.rel-card-body { flex: 1; }

.rel-card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}

.rel-card-desc {
  font-size: 13px;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.5;
}

.rel-card-count {
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  font-family: 'JetBrains Mono', monospace;
  white-space: nowrap;
}

/* ============================================
   RESPONSIVE — Tablet (641–1024px)
   ============================================ */
@media (max-width: 1024px) {
  .seo-main {
    max-width: 100%;
    padding: 40px 32px 72px;
  }

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

/* ============================================
   RESPONSIVE — Mobile (≤640px)
   ============================================ */
@media (max-width: 640px) {
  /* Nav */
  .seo-nav {
    padding: 0 14px;
    gap: 0;
    height: 48px;
  }

  .seo-nav a {
    font-size: 12px;
    padding: 5px 8px;
    min-height: 40px;
    display: flex;
    align-items: center;
  }

  .seo-nav a.nav-brand {
    margin-right: 4px;
    font-size: 13px;
  }

  /* Main content */
  .seo-main {
    padding: 28px 16px 56px;
  }

  /* Headings */
  h1 {
    font-size: clamp(24px, 7vw, 36px);
    letter-spacing: -0.3px;
  }

  h2 {
    font-size: 17px;
    margin: 32px 0 14px;
  }

  p {
    font-size: 15px;
  }

  /* Answer box */
  .answer-box {
    padding: 16px 18px;
    font-size: 15px;
    margin-bottom: 28px;
  }

  /* Tables — scrollable on mobile */
  table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 13px;
  }

  thead th {
    padding: 8px 10px;
    white-space: nowrap;
  }

  tbody td {
    padding: 10px 10px;
  }

  /* Breadcrumb */
  .breadcrumb {
    margin-bottom: 20px;
    font-size: 12px;
  }

  /* Featured langs grid */
  .featured-langs {
    grid-template-columns: repeat(auto-fill, minmax(88px, 1fr));
    gap: 8px;
    margin-bottom: 28px;
  }

  .featured-lang-card {
    padding: 12px 8px;
    border-radius: 8px;
  }

  .featured-lang-name {
    font-size: 13px;
  }

  /* All languages grid */
  .related-grid {
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 6px;
  }

  .related-card {
    padding: 10px 12px;
    min-height: 40px;
    display: flex;
    align-items: center;
  }

  /* Tool index */
  .tool-index-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .tool-index-card {
    padding: 14px 16px;
    flex-direction: row;
    align-items: center;
    gap: 12px;
  }

  /* Guide cards */
  .guide-cards {
    gap: 8px;
  }

  .guide-card {
    padding: 16px 18px;
  }

  .guide-card-title {
    font-size: 15px;
  }

  .guide-card-desc {
    font-size: 13px;
  }

  /* Relationship cards */
  .rel-cards {
    gap: 8px;
  }

  .rel-card {
    flex-direction: row;
    align-items: center;
    padding: 14px 16px;
    gap: 12px;
  }

  .rel-card-title {
    font-size: 14px;
  }

  .rel-card-desc {
    font-size: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .rel-card-count {
    font-size: 22px;
    flex-shrink: 0;
  }

  /* Stat grid (dataset page) */
  .stat-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .stat-number {
    font-size: 24px;
  }

  /* Explore button */
  .explore-btn {
    margin-top: 32px;
    padding: 12px 22px;
    font-size: 14px;
    min-height: 48px;
    width: 100%;
    justify-content: center;
  }

  /* FAQ */
  .faq-question {
    font-size: 15px;
  }

  .faq-answer {
    font-size: 14px;
  }

  /* Meta tags */
  .node-meta {
    gap: 6px;
    margin-bottom: 24px;
  }

  .meta-tag {
    font-size: 11px;
    padding: 4px 10px;
  }

  /* Footer */
  .seo-footer {
    padding: 20px 16px;
    gap: 10px;
    font-size: 12px;
  }

  .seo-footer-copy {
    margin-left: 0;
    width: 100%;
    margin-top: 4px;
  }

  /* Code blocks */
  pre {
    font-size: 12px;
    padding: 12px 14px;
  }
}

/* ============================================
   RESPONSIVE — Small Phone (≤390px)
   ============================================ */
@media (max-width: 390px) {
  .seo-main {
    padding: 24px 14px 48px;
  }

  h1 {
    font-size: 22px;
  }

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

  .related-grid {
    grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  }

  .rel-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}

/* ============================================
   TOUCH — active states for SEO pages
   ============================================ */
@media (hover: none) and (pointer: coarse) {
  .related-card:hover,
  .featured-lang-card:hover,
  .guide-card:hover,
  .tool-index-card:hover,
  .rel-card:hover {
    border-color: var(--border);
    transform: none;
    box-shadow: none;
  }

  .related-card:active {
    border-color: var(--accent);
    color: var(--accent);
  }

  .featured-lang-card:active {
    border-color: var(--accent);
  }

  .guide-card:active {
    border-left-color: var(--accent);
  }

  .explore-btn:active {
    background: var(--accent-hover);
  }
}