/* ============================================================
   Sympatheia Demo Page — styles
   ============================================================ */

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

:root {
  --navy:      #211d17;
  --navy-lt:   #2e2820;
  --teal:      #b85c2e;
  --teal-lt:   #f5ede4;
  --teal-dk:   #8e4520;
  --teal2:     #8b6d4e;
  --teal2-lt:  #f0e8dc;
  --teal2-dk:  #6a5038;
  --orange:    #e07b39;
  --orange-lt: #fdf0e6;
  --purple:    #7e57c2;
  --purple-lt: #f0ecfb;
  --red:       #c0392b;
  --red-lt:    #fbeaea;
  --gray-05:   #f0ebe3;
  --gray-10:   #e5ddd4;
  --gray-30:   #b5a898;
  --gray-60:   #666;
  --gray-80:   #2a221a;
  --white:     #fdf9f4;
  --radius:    10px;
  --shadow:    0 2px 12px rgba(0,0,0,.10);
  --font:      'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --mono:      'JetBrains Mono', 'Fira Mono', 'Courier New', monospace;
}

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

body {
  font-family: var(--font);
  color: var(--gray-80);
  background: var(--white);
  line-height: 1.65;
}

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

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

h1, h2, h3 { line-height: 1.25; }

/* ---------- Navigation ---------- */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--navy);
  color: var(--white);
  display: flex;
  align-items: center;
  gap: 0;
  padding: 0 2rem;
  height: 52px;
  box-shadow: 0 2px 8px rgba(0,0,0,.3);
}

.nav-brand {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: .02em;
  color: var(--white);
  margin-right: auto;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  gap: 0;
  list-style: none;
}

.nav-links a {
  display: block;
  padding: .3rem .85rem;
  color: rgba(255,255,255,.75);
  font-size: .875rem;
  border-radius: 4px;
  transition: color .15s, background .15s;
}

.nav-links a:hover {
  color: var(--white);
  background: rgba(255,255,255,.12);
  text-decoration: none;
}

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

section {
  padding: 4rem 0;
  border-bottom: 1px solid var(--gray-10);
}

section:last-of-type { border-bottom: none; }

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: .4rem;
}

.section-sub {
  color: var(--gray-60);
  margin-bottom: 2rem;
  font-size: .95rem;
}

/* ---------- Hero ---------- */
#hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-lt) 100%);
  color: var(--white);
  padding: 5rem 0 4rem;
  border-bottom: none;
}

.hero-inner { max-width: 860px; margin: 0 auto; padding: 0 1.5rem; }

.hero-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1rem;
}

.rainbow-text {
  background: linear-gradient(45deg, #ff6b6b, #ffa94d, #ffd43b, #69db7c, #74c0fc, #da77f2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-authors {
  font-size: .95rem;
  color: rgba(255,255,255,.7);
  margin-bottom: 1.6rem;
}

.hero-abstract {
  font-size: 1rem;
  color: rgba(255,255,255,.85);
  line-height: 1.75;
  margin-bottom: 2rem;
  max-width: 720px;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .45rem 1rem;
  border-radius: 6px;
  font-size: .85rem;
  font-weight: 600;
  border: 1.5px solid rgba(255,255,255,.3);
  color: var(--white);
  transition: background .15s, border-color .15s;
}

.badge:hover {
  background: rgba(255,255,255,.15);
  border-color: rgba(255,255,255,.6);
  text-decoration: none;
}

.badge svg { width: 16px; height: 16px; flex-shrink: 0; }

/* ---------- Overview ---------- */
.overview-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 2rem;
  align-items: start;
}

.overview-img-wrap {
  background: var(--gray-05);
  border-radius: var(--radius);
  padding: 1.2rem;
  text-align: center;
}

.overview-img-wrap img { width: 100%; border-radius: 6px; }
.overview-img-wrap figcaption { font-size: .8rem; color: var(--gray-60); margin-top: .6rem; }

.emotion-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .5rem;
}

.emotion-chip {
  background: var(--gray-05);
  border: 1px solid var(--gray-10);
  border-radius: 8px;
  padding: .45rem .6rem;
  text-align: center;
  font-size: .78rem;
}

.emotion-chip .emo-name { font-weight: 600; color: var(--navy); display: block; }
.emotion-chip .emo-va   { color: var(--gray-60); font-size: .72rem; font-family: var(--mono); }

/* ---------- Comparison sections ---------- */

/* Emotion tab bar */
.emotion-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
  margin-bottom: 1.5rem;
}

.etab-btn {
  padding: .35rem .8rem;
  border-radius: 20px;
  border: 1.5px solid var(--gray-10);
  background: var(--white);
  color: var(--gray-60);
  cursor: pointer;
  font-size: .82rem;
  font-weight: 500;
  transition: all .15s;
}

.etab-btn:hover {
  border-color: var(--teal);
  color: var(--teal);
}

.etab-btn.active {
  background: var(--navy);
  border-color: var(--navy);
  color: var(--white);
}

/* Emotion panel */
.emotion-panel { display: none; }
.emotion-panel.active { display: block; }

/* Example sub-tabs (within each emotion panel) */
.example-tabs {
  display: flex;
  gap: .4rem;
  margin-bottom: 1rem;
}

.extab-btn {
  padding: .25rem .7rem;
  border-radius: 16px;
  border: 1.5px solid var(--gray-10);
  background: var(--white);
  color: var(--gray-60);
  cursor: pointer;
  font-size: .78rem;
  font-weight: 500;
  transition: all .15s;
}

.extab-btn:hover { border-color: var(--teal); color: var(--teal); }
.extab-btn.active { background: var(--teal); border-color: var(--teal); color: var(--white); }

/* Per-emotion active colors for emotion tab buttons */
.etab-btn[data-emo="angry"].active      { background: #c0392b; border-color: #c0392b; color: #fff; }
.etab-btn[data-emo="anxious"].active    { background: #7d3c98; border-color: #7d3c98; color: #fff; }
.etab-btn[data-emo="content"].active    { background: #27ae60; border-color: #27ae60; color: #fff; }
.etab-btn[data-emo="disgusted"].active  { background: #5b2c6f; border-color: #5b2c6f; color: #fff; }
.etab-btn[data-emo="excited"].active    { background: #e67e22; border-color: #e67e22; color: #fff; }
.etab-btn[data-emo="frustrated"].active { background: #c0737a; border-color: #c0737a; color: #fff; }
.etab-btn[data-emo="happy"].active      { background: #f5d800; border-color: #f5d800; color: #2a221a; }
.etab-btn[data-emo="neutral"].active    { background: #7f8c8d; border-color: #7f8c8d; color: #fff; }
.etab-btn[data-emo="relaxed"].active    { background: #1a9e8a; border-color: #1a9e8a; color: #fff; }
.etab-btn[data-emo="sad"].active        { background: #2980b9; border-color: #2980b9; color: #fff; }
.etab-btn[data-emo="surprised"].active  { background: #c0579a; border-color: #c0579a; color: #fff; }
.etab-btn[data-emo="tired"].active      { background: #8e9aaf; border-color: #8e9aaf; color: #fff; }

.example-pane { display: none; }
.example-pane.active { display: block; }

.panel-header {
  display: flex;
  align-items: center;
  gap: .8rem;
  margin-bottom: 1.2rem;
}

.emo-badge {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  background: var(--navy);
  color: var(--white);
  border-radius: 20px;
  padding: .3rem .9rem;
  font-weight: 700;
  font-size: .9rem;
}

/* Query block */
.query-block {
  background: var(--gray-05);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  margin-bottom: 1.4rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.query-label {
  font-size: .78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--gray-60);
  white-space: nowrap;
}

.query-block audio { flex: 1; min-width: 200px; height: 36px; }

/* Models grid */
.models-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: .75rem;
}

.model-card {
  border-radius: var(--radius);
  border: 1.5px solid var(--gray-10);
  overflow: hidden;
}

.model-card-header {
  padding: .5rem .85rem;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .03em;
}

.model-card-body {
  padding: .75rem .85rem;
  display: flex;
  flex-direction: column;
  gap: .6rem;
}

.model-card audio { width: 100%; height: 36px; }

.model-card.base       .model-card-header { background: var(--red-lt);    color: var(--red);      }
.model-card.qwen       .model-card-header { background: var(--orange-lt); color: var(--orange);   }
.model-card.opens2s    .model-card-header { background: var(--purple-lt); color: var(--purple);   }
.model-card.kimi       .model-card-header { background: #e8f4fd; color: #1a6fa8; }

.model-card.sympatheia .model-card-header {
  background: linear-gradient(45deg, #ff6b6b, #ffa94d, #ffd43b, #69db7c, #74c0fc, #da77f2);
  color: #fff;
  text-shadow: 0 1px 3px rgba(0,0,0,.28);
}

.model-card.sympatheia { border-color: var(--gray-30); }


/* Transcript */
details.transcript { font-size: .82rem; }
details.transcript summary {
  cursor: pointer;
  color: var(--gray-60);
  list-style: none;
  display: flex;
  align-items: center;
  gap: .3rem;
}
details.transcript summary::before {
  content: '▸';
  font-size: .7rem;
  transition: transform .15s;
}
details.transcript[open] summary::before { transform: rotate(90deg); }
details.transcript summary::-webkit-details-marker { display: none; }

.transcript-text {
  margin-top: .4rem;
  padding: .6rem .75rem;
  background: var(--gray-05);
  border-radius: 6px;
  color: var(--gray-80);
  font-size: .82rem;
  line-height: 1.55;
}

/* ---------- Interpolation ---------- */
.interp-input-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--gray-05);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.interp-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
  margin-bottom: 1.2rem;
}

.interp-card {
  border-radius: var(--radius);
  border: 1.5px solid var(--gray-10);
  overflow: hidden;
  text-align: center;
}

.interp-bar {
  height: 6px;
}

/* Happy → Sad: yellow → blue (emotion colors from dataset section) */
.interp-steps--happy-sad .interp-card:nth-child(1) .interp-bar { background: #f5d800; }
.interp-steps--happy-sad .interp-card:nth-child(2) .interp-bar { background: linear-gradient(90deg, #f5d800, #2980b9); }
.interp-steps--happy-sad .interp-card:nth-child(3) .interp-bar { background: linear-gradient(90deg, #f5d800, #2980b9); }
.interp-steps--happy-sad .interp-card:nth-child(4) .interp-bar { background: linear-gradient(90deg, #f5d800, #2980b9); }
.interp-steps--happy-sad .interp-card:nth-child(5) .interp-bar { background: #2980b9; }

/* Anxious → Relaxed: purple → teal (emotion colors from dataset section) */
.interp-steps--anxious-relaxed .interp-card:nth-child(1) .interp-bar { background: #7d3c98; }
.interp-steps--anxious-relaxed .interp-card:nth-child(2) .interp-bar { background: linear-gradient(90deg, #7d3c98, #1a9e8a); }
.interp-steps--anxious-relaxed .interp-card:nth-child(3) .interp-bar { background: linear-gradient(90deg, #7d3c98, #1a9e8a); }
.interp-steps--anxious-relaxed .interp-card:nth-child(4) .interp-bar { background: linear-gradient(90deg, #7d3c98, #1a9e8a); }
.interp-steps--anxious-relaxed .interp-card:nth-child(5) .interp-bar { background: #1a9e8a; }

.interp-label {
  font-size: .78rem;
  font-weight: 600;
  color: var(--gray-80);
  padding: .4rem .5rem .2rem;
}

.interp-va {
  font-size: .7rem;
  font-family: var(--mono);
  color: var(--gray-60);
  padding-bottom: .4rem;
}

.interp-card audio { width: 100%; height: 36px; padding: 0 .5rem .5rem; }

.interp-arrow {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: .85rem;
  font-weight: 600;
  color: var(--gray-60);
  padding: 0 .2rem;
}

.interp-arrow::after {
  content: '';
  flex: 1;
  height: 2px;
  background: var(--gray-10);
  margin: 0 .8rem;
  border-radius: 2px;
}

.interp-arrow--happy-sad::after       { background: linear-gradient(90deg, #f5d800, #2980b9); }
.interp-arrow--anxious-relaxed::after { background: linear-gradient(90deg, #7d3c98, #1a9e8a); }

/* ---------- Dataset ---------- */
.dataset-split-label {
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: .03em;
  margin-bottom: 1rem;
  padding-bottom: .4rem;
  border-bottom: 2px solid var(--gray-20);
}
.dataset-shared-query {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
  padding: .75rem 1rem;
  background: var(--surface);
  border: 1.5px solid var(--gray-10);
  border-radius: var(--radius);
}
.dataset-shared-query audio { flex: 1; height: 36px; }

.dataset-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.dataset-card {
  border: 1.5px solid var(--gray-10);
  border-radius: var(--radius);
  overflow: hidden;
}

.dataset-card-header {
  background: var(--navy);
  color: var(--white);
  padding: .6rem 1rem;
  font-weight: 700;
  font-size: .9rem;
  display: flex;
  align-items: center;
  gap: .6rem;
}

.dataset-card.emo-angry      .dataset-card-header { background: #c0392b; }
.dataset-card.emo-anxious    .dataset-card-header { background: #7d3c98; }
.dataset-card.emo-content    .dataset-card-header { background: #27ae60; }
.dataset-card.emo-disgusted  .dataset-card-header { background: #5b2c6f; }
.dataset-card.emo-excited    .dataset-card-header { background: #e67e22; }
.dataset-card.emo-frustrated .dataset-card-header { background: #c0737a; }
.dataset-card.emo-happy      .dataset-card-header { background: #f5d800; }
.dataset-card.emo-neutral    .dataset-card-header { background: #7f8c8d; }
.dataset-card.emo-relaxed    .dataset-card-header { background: #1a9e8a; }
.dataset-card.emo-sad        .dataset-card-header { background: #2980b9; }
.dataset-card.emo-surprised  .dataset-card-header { background: #c0579a; }
.dataset-card.emo-tired      .dataset-card-header { background: #8e9aaf; }

.dataset-card-body {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: .8rem;
}

.audio-row {
  display: flex;
  align-items: center;
  gap: .75rem;
}

.audio-row-label {
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--gray-60);
  min-width: 70px;
}

.audio-row audio { flex: 1; height: 36px; }

.dataset-desc {
  background: var(--gray-05);
  border-radius: 8px;
  padding: 1rem 1.2rem;
  font-size: .875rem;
  color: var(--gray-80);
  margin-top: 1.5rem;
  line-height: 1.7;
}

/* ---------- Results ---------- */
.results-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.results-table-wrap { overflow-x: auto; }

.results-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: .75rem;
}

table.score-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .82rem;
}

table.score-table th {
  background: var(--navy);
  color: var(--white);
  padding: .5rem .7rem;
  text-align: center;
  font-weight: 600;
  white-space: nowrap;
}

table.score-table th:first-child { text-align: left; }

table.score-table td {
  padding: .38rem .7rem;
  text-align: center;
  border-bottom: 1px solid var(--gray-10);
}

table.score-table td:first-child { text-align: left; font-weight: 500; }

table.score-table tbody tr:hover { background: var(--gray-05); }

/* Score color cells */
.sc {
  border-radius: 4px;
  padding: .15rem .4rem;
  font-weight: 600;
}

.sc-1 { background: #fde8e8; color: #b91c1c; }
.sc-2 { background: #fef3e2; color: #b45309; }
.sc-3 { background: #fefce8; color: #a16207; }
.sc-4 { background: #ecfdf5; color: #166534; }
.sc-5 { background: #d1fae5; color: #064e3b; }

.score-best { font-weight: 700; }

table.score-table tfoot td {
  font-weight: 700;
  background: var(--gray-05);
  border-top: 2px solid var(--gray-10);
}

/* Summary bar chart */
.summary-bars {
  margin-top: 1.5rem;
}

.bar-row {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-bottom: .55rem;
  font-size: .85rem;
}

.bar-model {
  width: 130px;
  flex-shrink: 0;
  font-weight: 500;
  font-size: .8rem;
}

.bar-track {
  flex: 1;
  background: var(--gray-10);
  border-radius: 20px;
  height: 18px;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  border-radius: 20px;
  transition: width .6s ease;
  display: flex;
  align-items: center;
  padding-left: .6rem;
}

.bar-val {
  font-size: .75rem;
  font-weight: 700;
  color: var(--white);
  white-space: nowrap;
}

.bar-fill.base-color           { background: var(--red);    }
.bar-fill.qwen-color           { background: var(--orange);  }
.bar-fill.opens2s-color        { background: var(--purple);  }
.bar-fill.sympatheia-v1-color  { background: var(--teal2);   }
.bar-fill.sympatheia-v2-color  { background: var(--teal);    }

/* ---------- Footer ---------- */
footer {
  background: var(--navy);
  color: rgba(255,255,255,.55);
  text-align: center;
  padding: 2rem 1.5rem;
  font-size: .85rem;
}

footer a { color: rgba(255,255,255,.75); }
footer a:hover { color: var(--white); }

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .models-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 900px) {
  .overview-grid   { grid-template-columns: 1fr; }
  .models-grid     { grid-template-columns: repeat(2, 1fr); }
  .interp-steps    { grid-template-columns: repeat(3, 1fr); }
  .dataset-grid    { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .models-grid   { grid-template-columns: 1fr; }
  .interp-steps  { grid-template-columns: repeat(2, 1fr); }
  .dataset-grid  { grid-template-columns: 1fr; }
  nav { padding: 0 1rem; }
  .nav-links a { padding: .3rem .5rem; font-size: .8rem; }
}