:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #1f2937;
  background: #f7f8fa;
}
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  line-height: 1.55;
}

main {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
  padding: 56px 0 72px;
}

header {
  text-align: center;
  margin-bottom: 40px;
}

h1 {
  margin: 0 0 8px;
  color: #111827;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.1rem, 5vw, 3.25rem);
  letter-spacing: -0.03em;
}

.subtitle {
  margin: 0 auto 18px;
  max-width: 860px;
  color: #374151;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.15rem;
}

.venue,
.summary {
  margin: 7px auto;
  max-width: 900px;
}

.venue {
  font-weight: 600;
}

.muted {
  color: #6b7280;
  font-size: 0.92rem;
}

.resource-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 6px;
  margin-top: 20px;
}

.resource-badges a {
  display: inline-flex;
}

.resource-badges img {
  display: block;
  height: 22px;
}

.framework {
  margin: 26px auto 44px;
  padding: 18px;
  border: 1px solid #d9dee7;
  border-radius: 6px;
  background: #fff;
}

.framework img {
  display: block;
  width: 100%;
  height: auto;
}

.video-demos {
  margin-top: 44px;
}

.video-notice {
  margin: 0 0 18px;
  padding: 13px 16px;
  border-left: 3px solid #64748b;
  background: #fff;
  color: #475569;
  font-size: 0.92rem;
}

.video-sample {
  margin: 0 0 20px;
  overflow: hidden;
  border: 1px solid #d9dee7;
  border-radius: 6px;
  background: #fff;
}

.video-pair {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.video-panel {
  min-width: 0;
  padding: 15px;
}

.video-panel + .video-panel {
  border-left: 1px solid #e5e7eb;
}

video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 4px;
  background: #111827;
  object-fit: contain;
}

.video-caption {
  margin: 9px 0 0;
  color: #64748b;
  font-size: 0.88rem;
}

@media (max-width: 900px) and (min-width: 701px) {
  .video-pair {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .video-panel:nth-child(3) {
    border-top: 1px solid #e5e7eb;
    border-left: 0;
  }
}

.direction {
  margin-top: 44px;
}

h2 {
  margin: 0 0 6px;
  color: #111827;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.65rem;
}

.news {
  margin: 0 auto 24px;
  padding: 17px 20px;
  border-left: 3px solid #64748b;
  background: #fff;
}

.news h2 {
  margin-bottom: 5px;
  font-size: 1.25rem;
}

.news p {
  margin: 0;
}

.direction-intro {
  margin: 0 0 18px;
  color: #6b7280;
}

.sample {
  margin: 0 0 18px;
  overflow: hidden;
  border: 1px solid #d9dee7;
  border-radius: 6px;
  background: #fff;
}

.sample-title {
  margin: 0;
  padding: 9px 14px;
  border-bottom: 1px solid #e5e7eb;
  background: #f8fafc;
  color: #475569;
  font-size: 0.88rem;
  font-weight: 600;
}

.pair {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(260px, 1.25fr) minmax(0, 0.9fr);
}

.sample-cell {
  min-width: 0;
  padding: 15px;
}

.sample-cell + .sample-cell {
  border-left: 1px solid #e5e7eb;
}

.cot-cell {
  background: #fbfcfe;
}

.cot-cell details {
  border: 1px solid #dbe2ea;
  border-radius: 4px;
  background: #fff;
}

.cot-cell summary {
  padding: 9px 11px;
  color: #334155;
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 600;
}

.cot-cell details[open] summary {
  border-bottom: 1px solid #e5e7eb;
}

.cot-text {
  max-height: 380px;
  overflow-y: auto;
  padding: 11px;
  color: #334155;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 0.86rem;
  line-height: 1.55;
  white-space: pre-wrap;
}

.cell-label {
  margin: 0 0 7px;
  color: #64748b;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.transcript {
  min-height: 48px;
  margin: 0 0 10px;
  color: #111827;
}

audio {
  display: block;
  width: 100%;
  height: 38px;
}

footer {
  margin-top: 52px;
  padding-top: 18px;
  border-top: 1px solid #d9dee7;
  color: #6b7280;
  text-align: center;
  font-size: 0.86rem;
}

@media (max-width: 700px) {
  main {
    width: min(100% - 20px, 1080px);
    padding-top: 34px;
  }

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

  .video-pair {
    grid-template-columns: 1fr;
  }

  .video-panel + .video-panel {
    border-top: 1px solid #e5e7eb;
    border-left: 0;
  }

  .sample-cell + .sample-cell {
    border-top: 1px solid #e5e7eb;
    border-left: 0;
  }

  .transcript {
    min-height: auto;
  }
}

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

@media (max-width: 700px) {
  .video-comparison {
    grid-template-columns: 1fr;
  }
}