:root {
  --fg: #1f2933;
  --fg-soft: #3d4a59;
  --fg-mute: #6b7785;
  --heading: #1d2d3a;
  --bg-page: #f4f6f9;
  --bg-card: #ffffff;
  --border: #dde2e9;
  --border-soft: #ebeef2;
  --row-hover: #f8fafc;
  --link: #2461c4;
  --text-color: #a94e4a;
  --text-bg: #f7dfdd;
  --emotion-color: #7552a4;
  --emotion-bg: #eadff5;
  --pitch-color: #39769d;
  --pitch-bg: #dcecf7;
  --rate-color: #3f7951;
  --rate-bg: #dff0e3;
  --pause-color: #85613d;
  --pause-bg: #eee3d5;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--fg);
  background: var(--bg-page);
  font-family: "Roboto", -apple-system, BlinkMacSystemFont, "Segoe UI",
    Helvetica, Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--link);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.page {
  width: min(1480px, 100%);
  margin: 0 auto;
  padding: 30px 24px 48px;
}

.card {
  margin-bottom: 30px;
  padding: 42px 48px;
  border-radius: 14px;
  background: var(--bg-card);
  box-shadow:
    0 5px 24px rgba(15, 23, 42, 0.06),
    0 1px 2px rgba(15, 23, 42, 0.04);
}

.hero {
  padding-top: 48px;
  text-align: center;
}

.hero h1 {
  margin: 0 0 8px;
  color: var(--heading);
  font-family: "Roboto Slab", Georgia, serif;
  font-size: clamp(42px, 5vw, 58px);
  letter-spacing: -0.02em;
}

.tagline {
  margin: 0 auto 10px;
  color: var(--fg-soft);
  font-size: 19px;
}

.project-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin: 0 auto 24px;
  font-size: 14px;
}

.project-links span {
  color: var(--fg-mute);
}

.abstract,
.contents-label,
.contents {
  max-width: 980px;
  text-align: left;
}

.abstract {
  margin: 0 auto 22px;
  font-size: 16px;
  line-height: 1.75;
}

.contents-label {
  margin: 0 auto 4px;
}

.contents {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 3px 24px;
  margin: 0 auto;
  padding-left: 22px;
  color: var(--fg-soft);
  font-size: 15px;
}

.card-heading {
  margin: 0 0 30px;
  text-align: center;
}

.card-heading h2 {
  display: inline-block;
  margin: 0;
  padding-bottom: 10px;
  border-bottom: 3px solid #d6dde6;
  color: var(--heading);
  font-size: 30px;
  letter-spacing: -0.01em;
}

.architecture {
  margin: 0;
  text-align: center;
}

.architecture img {
  display: block;
  width: min(1062px, 100%);
  height: auto;
  margin: 0 auto;
}

.evaluation-charts {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
  gap: 22px;
  align-items: center;
}

.evaluation-chart {
  margin: 0;
}

.evaluation-chart img {
  display: block;
  width: 100%;
  max-height: 430px;
  object-fit: contain;
}

.benchmark-section {
  padding-bottom: 30px;
}

.benchmark-heading {
  margin-bottom: 22px;
}

.benchmark-heading p {
  margin: 8px auto 0;
  color: var(--fg-mute);
  font-size: 14px;
}

.sample-list {
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

.sample-row {
  padding: 15px 16px 16px;
  border-bottom: 1px solid var(--border);
}

.sample-row:last-child {
  border-bottom: 0;
}

.sample-row:hover {
  background: var(--row-hover);
}

.sample-meta {
  display: flex;
  min-width: 0;
  gap: 9px;
  align-items: baseline;
  margin-bottom: 9px;
}

.sample-index {
  flex: none;
  color: var(--heading);
  font-size: 12px;
  font-weight: 700;
}

.sample-focus {
  min-width: 0;
  color: var(--fg-soft);
  font-size: 13px;
}

.tag-row {
  display: flex;
  flex: none;
  gap: 5px;
  margin-left: auto;
}

.tag {
  padding: 1px 7px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--fg-mute);
  background: #fff;
  font-size: 10px;
  font-weight: 600;
}

.instruction-panel {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  margin-bottom: 11px;
}

.instruction-label {
  padding-top: 7px;
  color: var(--fg-mute);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.edit-canvas {
  min-width: 0;
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: #fff;
  color: #242524;
  font-size: 13px;
  line-height: 2.05;
  overflow-wrap: anywhere;
}

.operation-span,
.operation-point {
  --op-color: var(--text-color);
  --op-bg: var(--text-bg);
}

.operation-emotion {
  --op-color: var(--emotion-color);
  --op-bg: var(--emotion-bg);
}

.operation-pitch {
  --op-color: var(--pitch-color);
  --op-bg: var(--pitch-bg);
}

.operation-rate {
  --op-color: var(--rate-color);
  --op-bg: var(--rate-bg);
}

.operation-pause {
  --op-color: var(--pause-color);
  --op-bg: var(--pause-bg);
}

.operation-span {
  display: inline;
  padding: 2px 3px;
  border-radius: 3px;
  background: var(--op-bg);
  box-shadow: inset 0 -2px 0 color-mix(in srgb, var(--op-color) 68%, transparent);
}

.operation-source {
  color: color-mix(in srgb, var(--op-color) 88%, #222);
  font-weight: 500;
}

.operation-delete .operation-source {
  text-decoration: line-through;
  text-decoration-color: var(--op-color);
  text-decoration-thickness: 1.5px;
}

.operation-label,
.operation-point {
  display: inline-flex;
  margin: 0 3px;
  padding: 1px 6px;
  border: 1px solid color-mix(in srgb, var(--op-color) 45%, white);
  border-radius: 5px;
  color: color-mix(in srgb, var(--op-color) 88%, black);
  background: var(--op-bg);
  font-size: 10px;
  font-weight: 700;
  line-height: 18px;
  vertical-align: 1px;
}

.audio-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
  margin-left: 88px;
}

.audio-cell {
  min-width: 0;
  padding: 7px 8px 8px;
  border: 1px solid var(--border-soft);
  border-radius: 7px;
  background: #fff;
}

.audio-cell.ours {
  border-color: #a9cbb5;
  background: #f4faf6;
}

.audio-label {
  display: flex;
  min-height: 25px;
  gap: 6px;
  align-items: start;
  justify-content: space-between;
  margin-bottom: 3px;
  font-size: 11px;
  font-weight: 600;
  line-height: 1.25;
}

.model-badge {
  padding: 1px 4px;
  border-radius: 3px;
  color: #28623f;
  background: #dff0e3;
  font-size: 8px;
  text-transform: uppercase;
}

audio {
  display: block;
  width: 100%;
  height: 30px;
}

.pending-row {
  padding: 16px;
  border: 1px dashed var(--border);
  border-radius: 8px;
  color: var(--fg-mute);
  text-align: center;
  font-size: 13px;
}

.loading-card,
.error-card {
  color: var(--fg-mute);
  text-align: center;
}

.error-card {
  color: #913d3d;
}

footer {
  display: flex;
  gap: 28px;
  align-items: start;
  justify-content: space-between;
  padding: 10px 8px 18px;
  color: var(--fg-mute);
  font-size: 12px;
}

footer p {
  margin: 0;
}

@media (max-width: 980px) {
  .evaluation-charts {
    grid-template-columns: 1fr;
  }

  .audio-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .audio-cell:first-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 700px) {
  .page {
    padding: 14px 10px 30px;
  }

  .card {
    margin-bottom: 14px;
    padding: 28px 16px;
    border-radius: 10px;
  }

  .contents {
    grid-template-columns: 1fr 1fr;
  }

  .sample-row {
    padding: 13px 10px;
  }

  .sample-meta {
    flex-wrap: wrap;
  }

  .sample-focus {
    flex-basis: calc(100% - 74px);
  }

  .tag-row {
    flex-basis: 100%;
    margin-left: 0;
  }

  .instruction-panel {
    grid-template-columns: 1fr;
    gap: 3px;
  }

  .instruction-label {
    padding-top: 0;
  }

  .audio-grid {
    grid-template-columns: 1fr;
    margin-left: 0;
  }

  .audio-cell:first-child {
    grid-column: auto;
  }

  footer {
    display: block;
  }

  footer p + p {
    margin-top: 5px;
  }
}