/* GVR-VAE demo — quiet academic look */
:root {
  --bg: #f7f5f1;
  --paper: #fffcf7;
  --ink: #1c1b19;
  --muted: #6b6560;
  --line: #ddd6cc;
  --accent: #8b3a3a;
  --drop: rgba(200, 120, 120, 0.45);
  --wave: #2a2825;
  --max: 60rem;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: "Source Sans 3", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.hero, .section, .foot {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2.5rem 1.25rem;
}
.section.wide { max-width: var(--max); }
.method-fig {
  width: 80%;
  margin: 0 auto;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 4px;
  padding: 1rem;
}
.method-fig img { display: block; width: 100%; height: auto; }

.hero {
  padding-top: 4rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--line);
}
.eyebrow {
  font-size: 0.9rem;
  letter-spacing: 0.01em;
  text-transform: none;
  color: var(--muted);
  margin: 0 0 0.75rem;
}
.eyebrow strong { color: var(--ink); font-weight: 700; }
.hero h1 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(2.4rem, 5vw, 3.4rem);
  letter-spacing: -0.02em;
  margin: 0 0 0.75rem;
}
.lede {
  color: var(--muted);
  margin: 0 0 1.25rem;
  font-size: 1.05rem;
  text-align: justify;
  text-justify: inter-word;
}
.links a { color: var(--accent); text-decoration: none; border-bottom: 1px solid transparent; }
.links a:hover { border-bottom-color: var(--accent); }
.dot { color: var(--line); margin: 0 0.4rem; }

.section h2 {
  font-family: var(--serif);
  font-size: 1.55rem;
  font-weight: 600;
  margin: 0 0 0.4rem;
}
.sub { color: var(--muted); margin: 0 0 1.25rem; text-align: justify; text-justify: inter-word; }
.sub.note { font-size: 0.86rem; margin-top: -0.6rem; }
.sub code {
  font-family: var(--mono);
  font-size: 0.85em;
  background: #efeae2;
  padding: 0.05em 0.35em;
}

.sample-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}
.sample-tabs button {
  font: inherit;
  font-size: 0.88rem;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--muted);
  padding: 0.35rem 0.75rem;
  cursor: pointer;
  border-radius: 2px;
}
.sample-tabs button.active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.transcript {
  font-family: var(--serif);
  font-style: italic;
  color: var(--muted);
  margin: -0.25rem 0 1rem;
  font-size: 0.98rem;
}

.compare-table-wrap {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 2px;
  overflow: hidden;
}
.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}
.compare-table th {
  text-align: left;
  font-weight: 600;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0.65rem 0.9rem;
  border-bottom: 1px solid var(--line);
  background: #f3efe8;
}
.compare-table th .th-unit {
  text-transform: none;
  letter-spacing: 0;
  font-weight: 500;
  opacity: 0.75;
}
.compare-table td {
  padding: 0.45rem 0.9rem;
  border-bottom: 1px solid var(--line);
  vertical-align: middle;
}
.compare-table tr:last-child td { border-bottom: none; }
.compare-table tr:hover td { background: #faf7f2; }
.compare-table tr.ours td {
  background: #fff8f6;
}
.compare-table tr.ours:hover td {
  background: #fff3ef;
}
.compare-table .name { font-weight: 560; width: 38%; }
.compare-table .bw {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--muted);
  width: 18%;
}
.compare-table .listen { width: 44%; }
.compare-table audio {
  width: 100%;
  height: 1.85rem;
  vertical-align: middle;
}

.explorer-card {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 1rem 1rem 0.75rem;
  border-radius: 2px;
}
.explorer-toolbar {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  grid-template-rows: auto auto;
  gap: 0.45rem 0.75rem;
  align-items: center;
  margin-bottom: 0.75rem;
}
.rate-label {
  font-size: 0.85rem;
  color: var(--muted);
  grid-column: 1;
}
.rate-label span {
  font-family: var(--mono);
  color: var(--ink);
  font-weight: 600;
  margin-left: 0.35rem;
}
#rate-slider {
  grid-column: 2;
  width: 100%;
  accent-color: var(--accent);
}
.rate-ticks {
  grid-column: 2;
  grid-row: 2;
  display: flex;
  justify-content: space-between;
  font-size: 0.65rem;
  color: var(--muted);
  font-family: var(--mono);
  padding: 0 2px;
}
.btn-auto, .btn-play {
  font: inherit;
  font-size: 0.85rem;
  border: 1px solid var(--line);
  background: var(--bg);
  padding: 0.35rem 0.7rem;
  cursor: pointer;
  border-radius: 2px;
}
.btn-auto.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}
.btn-play { min-width: 2.4rem; }
.chip {
  display: inline-block;
  padding: 0.02rem 0.4rem;
  margin: 0 0.1rem;
  border-radius: 999px;
  font-size: 0.78rem;
  border: 1px solid transparent;
}
.chip-sil { background: #e9ebed; color: #6b7075; }
.chip-unv { background: #f4d3c6; color: #a8461f; }
.chip-voi { background: #cfe8e2; color: #17564c; }
.canvas-wrap {
  width: 100%;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #fff;
}
#wave-canvas { display: block; width: 100%; height: auto; }

.stack-details {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--muted);
}
.stack-details img {
  width: 100%;
  margin-top: 0.5rem;
  border: 1px solid var(--line);
}

.fig-stack {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
.fig-group {
  margin-top: 1.35rem;
}
.fig-group:first-of-type {
  margin-top: 0.85rem;
}
.fig-label {
  margin: 0 0 0.55rem;
  font-size: 0.92rem;
  color: var(--ink);
  font-weight: 550;
}
.fig-stack figure { margin: 0; }
.fig-stack img {
  width: 100%;
  border: 1px solid var(--line);
  background: white;
}
.fig-stack figcaption {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.45rem;
}

.foot {
  border-top: 1px solid var(--line);
  padding-top: 1.5rem;
  padding-bottom: 3rem;
  font-size: 0.85rem;
  color: var(--muted);
}
.foot .muted { opacity: 0.75; }

@media (max-width: 640px) {
  .explorer-toolbar {
    grid-template-columns: 1fr auto auto;
  }
  .rate-label { grid-column: 1 / -1; }
  #rate-slider { grid-column: 1; }
  .rate-ticks { grid-column: 1; }
}