/* ===================================================
   Yoruba Terminology Dictionary — Stylesheet
   Design: Deep indigo + warm ochre + cream parchment
   Typography: Noto Serif (display) + Inter (body)
   =================================================== */

/* --- Tokens --- */
:root {
  --indigo-900: #1a1a4e;
  --indigo-700: #2d2d7a;
  --indigo-100: #eeeef9;
  --ochre:       #c8810a;
  --ochre-light: #f5e9d0;
  --cream:       #faf8f3;
  --ink:         #1c1c1c;
  --ink-muted:   #5a5a6e;
  --border:      #dddde8;
  --white:       #ffffff;
  --green:       #2e7d32;
  --radius:      6px;
  --shadow:      0 2px 12px rgba(26,26,78,0.08);
  /*
   * Font stack designed for full Yoruba Unicode support.
   * Each stack falls back to fonts with broad Unicode coverage.
   * 'Arial Unicode MS' and 'Noto Serif' both support all Yoruba characters.
   */
  --font-display: 'Noto Serif', 'Arial Unicode MS', 'DejaVu Serif', Georgia, serif;
  --font-body:    'Noto Sans', 'Arial Unicode MS', 'DejaVu Sans', system-ui, sans-serif;
  --font-mono:    'Noto Sans Mono', 'DejaVu Sans Mono', 'Courier New', monospace;
}

/* --- Reset --- */
*, *::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(--cream);
  color: var(--ink);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main { flex: 1; }
a { color: var(--indigo-700); text-decoration: none; }
a:hover { text-decoration: underline; color: var(--ochre); }
img { max-width: 100%; display: block; }

/* --- Container --- */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ===================================================
   HEADER
   =================================================== */
.site-header {
  background: var(--indigo-900);
  border-bottom: 3px solid var(--ochre);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
}
.site-brand {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  text-decoration: none;
}
.brand-yo {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--ochre);
  letter-spacing: 0.02em;
}
.brand-en {
  font-size: 0.7rem;
  color: rgba(255,255,255,0.55);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.site-nav {
  display: flex;
  gap: 0.25rem;
}
.site-nav a {
  color: rgba(255,255,255,0.8);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius);
  transition: background 0.15s, color 0.15s;
  text-decoration: none;
}
.site-nav a:hover,
.site-nav a.active {
  background: rgba(200,129,10,0.2);
  color: var(--ochre);
}
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.4rem;
  cursor: pointer;
  padding: 0.3rem 0.5rem;
}

/* ===================================================
   HOMEPAGE HERO
   =================================================== */
.hero {
  background: linear-gradient(135deg, var(--indigo-900) 0%, var(--indigo-700) 100%);
  color: var(--white);
  padding: 4rem 0 3rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: 'Ìtumọ̀';
  position: absolute;
  font-family: var(--font-display);
  font-size: 14rem;
  font-weight: 700;
  color: rgba(255,255,255,0.03);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  white-space: nowrap;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}
.hero h1 em {
  color: var(--ochre);
  font-style: normal;
}
.hero p {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.75);
  max-width: 600px;
  margin: 0 auto 2rem;
}

/* --- Stats Bar --- */
.stats-bar {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
  flex-wrap: wrap;
  background: var(--ochre-light);
  border-top: 2px solid var(--ochre);
  padding: 1rem 1.5rem;
}
.stat-item {
  text-align: center;
}
.stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--indigo-900);
}
.stat-label {
  font-size: 0.75rem;
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ===================================================
   SEARCH & FILTER
   =================================================== */
.search-area {
  padding: 2rem 0 1rem;
}
.search-row {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
  align-items: center;
}
#search-input {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 1rem;
  background: var(--white);
  color: var(--ink);
  transition: border-color 0.15s;
}
#search-input:focus {
  outline: none;
  border-color: var(--indigo-700);
}
#clear-btn {
  padding: 0.75rem 1.1rem;
  background: var(--border);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 1rem;
  color: var(--ink-muted);
  transition: background 0.15s;
}
#clear-btn:hover { background: var(--indigo-100); }

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}
.filter-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-right: 0.25rem;
}
.filter-btn {
  padding: 0.35rem 0.9rem;
  border: 2px solid var(--border);
  border-radius: 999px;
  background: var(--white);
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  color: var(--ink-muted);
  transition: all 0.15s;
}
.filter-btn:hover {
  border-color: var(--indigo-700);
  color: var(--indigo-700);
}
.filter-btn.active {
  background: var(--indigo-900);
  border-color: var(--indigo-900);
  color: var(--white);
}

.results-count {
  font-size: 0.85rem;
  color: var(--ink-muted);
  margin-top: 0.75rem;
}

/* ===================================================
   WORD GRID
   =================================================== */
.word-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  padding: 1.5rem 0 3rem;
}
.word-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem 1.5rem;
  transition: box-shadow 0.2s, transform 0.2s, border-color 0.2s;
  position: relative;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  display: block;
}
.word-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--ochre);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform 0.2s;
}
.word-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
  border-color: var(--indigo-100);
  text-decoration: none;
}
.word-card:hover::before { transform: scaleY(1); }

.card-subject {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ochre);
  margin-bottom: 0.5rem;
}
.card-yoruba {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--indigo-900);
  line-height: 1.4;
  margin-bottom: 0.3rem;
  font-variant-ligatures: none;
  font-feature-settings: "kern" 1, "liga" 0;
  text-rendering: optimizeLegibility;
}
.card-english {
  font-size: 0.88rem;
  color: var(--ink-muted);
}
.card-date {
  font-size: 0.75rem;
  color: var(--border);
  margin-top: 0.75rem;
  font-variant-numeric: tabular-nums;
}

.no-results {
  grid-column: 1 / -1;
  text-align: center;
  padding: 3rem;
  color: var(--ink-muted);
}

/* ===================================================
   DICTIONARY INDEX PAGE
   =================================================== */
.dict-index-header {
  padding: 3rem 0 2rem;
  border-bottom: 2px solid var(--border);
  margin-bottom: 2rem;
}
.dict-index-header h1 {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--indigo-900);
}
.dict-index-header p {
  color: var(--ink-muted);
  margin-top: 0.5rem;
}

/* ===================================================
   WORD ENTRY PAGE
   =================================================== */
.word-entry {
  padding: 2rem 0 4rem;
}
.breadcrumb {
  font-size: 0.82rem;
  color: var(--ink-muted);
  margin-bottom: 2rem;
}
.breadcrumb a { color: var(--ink-muted); }
.breadcrumb a:hover { color: var(--ochre); }

.word-header {
  padding-bottom: 2rem;
  border-bottom: 2px solid var(--border);
  margin-bottom: 2rem;
}
.word-subject-tag {
  display: inline-block;
  background: var(--ochre-light);
  color: var(--ochre);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}
.word-yoruba {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  color: var(--indigo-900);
  line-height: 1.3; /* increased for Yoruba combining diacritics */
  margin-bottom: 0.5rem;
  font-variant-ligatures: none; /* prevents ligature conflicts with tone marks */
  font-feature-settings: "kern" 1, "liga" 0; /* disable ligatures, keep kerning */
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
.word-english {
  font-size: 1.2rem;
  color: var(--ink-muted);
  font-style: italic;
  margin-bottom: 0.75rem;
}
.word-meta {
  font-size: 0.82rem;
  color: var(--ink-muted);
}
.word-meta strong { color: var(--indigo-700); }

.word-section {
  margin-bottom: 2.5rem;
}
.word-section h2 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--indigo-900);
  margin-bottom: 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
}
.word-definition,
.word-formation {
  line-height: 1.8;
  color: var(--ink);
}
.word-examples {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.word-examples li {
  background: var(--indigo-100);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
}
.example-yo {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--indigo-900);
  margin-bottom: 0.25rem;
}
.example-en {
  display: block;
  font-size: 0.9rem;
  color: var(--ink-muted);
  font-style: italic;
}

/* Related Terms */
.related-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.related-tag {
  padding: 0.35rem 0.9rem;
  background: var(--ochre-light);
  color: var(--ochre);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.15s;
}
.related-tag:hover {
  background: var(--ochre);
  color: var(--white);
  text-decoration: none;
}

/* ===================================================
   CITATION BOX
   =================================================== */
.citation-section {
  background: var(--indigo-100);
  border: 1px solid var(--indigo-700);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.citation-section h2 {
  border-bottom-color: rgba(45,45,122,0.2);
}
.citation-note {
  font-size: 0.8rem;
  color: var(--ink-muted);
  margin-bottom: 1.25rem;
}
.citation-block {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
  position: relative;
}
.citation-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--ink-muted);
  margin-bottom: 0.5rem;
}
.citation-text {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--ink);
  word-break: break-word;
  margin-bottom: 0.75rem;
}
.copy-btn {
  padding: 0.4rem 1rem;
  background: var(--indigo-900);
  color: var(--white);
  border: none;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
}
.copy-btn:hover { background: var(--indigo-700); }
.copy-btn.copied { background: var(--green); }

/* ===================================================
   ABOUT PAGE
   =================================================== */
.about-page {
  max-width: 720px;
  margin: 3rem auto;
  padding: 0 1.5rem 4rem;
}
.about-page h1 {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--indigo-900);
  margin-bottom: 0.5rem;
}
.about-page .subtitle {
  color: var(--ochre);
  font-size: 1rem;
  margin-bottom: 2rem;
  font-style: italic;
}
.about-page h2 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--indigo-900);
  margin: 2rem 0 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
}
.about-page p { margin-bottom: 1rem; line-height: 1.8; }
.about-page ul { padding-left: 1.5rem; margin-bottom: 1rem; }
.about-page li { margin-bottom: 0.4rem; line-height: 1.7; }

/* Citation example box on About page */
.cite-example {
  background: var(--indigo-100);
  border-left: 4px solid var(--indigo-700);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.7;
  margin: 1rem 0;
  word-break: break-word;
}

/* ===================================================
   FOOTER
   =================================================== */
.site-footer {
  background: var(--indigo-900);
  color: rgba(255,255,255,0.6);
  padding: 2rem 0;
  text-align: center;
  font-size: 0.82rem;
  margin-top: auto;
}
.site-footer strong { color: var(--ochre); }
.site-footer a { color: rgba(255,255,255,0.6); }
.site-footer a:hover { color: var(--ochre); text-decoration: none; }
.footer-cite {
  margin-top: 0.5rem;
  font-size: 0.75rem;
  opacity: 0.7;
}

/* ===================================================
   RESPONSIVE
   =================================================== */
@media (max-width: 800px) {
  .word-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .nav-toggle { display: block; }
  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--indigo-900);
    flex-direction: column;
    padding: 1rem 1.5rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    z-index: 200;
  }
  .site-nav.open { display: flex; }
  .site-header { position: relative; }

  .word-grid { grid-template-columns: 1fr; }
  .stats-bar { gap: 1.5rem; }
  .search-row { flex-direction: column; }
  #search-input, #clear-btn { width: 100%; }
  .filter-row { gap: 0.4rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* ===================================================
   RIS DOWNLOAD BLOCK
   =================================================== */
.ris-block {
  border-top: 2px dashed var(--ochre);
  margin-top: 1.25rem;
  padding-top: 1.25rem;
}
.ris-description {
  font-size: 0.85rem;
  color: var(--ink-muted);
  margin-bottom: 0.75rem;
  line-height: 1.6;
}
.ris-btn {
  background: var(--ochre);
  font-size: 0.9rem;
  padding: 0.55rem 1.25rem;
}
.ris-btn:hover {
  background: #a86c08;
}