:root {
  --bg: #f7f7f5;
  --card: #ffffff;
  --ink: #1c1d1f;
  --muted: #5d6066;
  --line: #e2e2de;
  --chip: #ecece8;
  --chip-on: #1c1d1f;
  --chip-on-ink: #ffffff;
  --accent-hf: #2f6fde;
  --accent-pk: #c2410c;
  --code: #f1f1ee;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121315;
    --card: #1b1c1f;
    --ink: #e9e9e6;
    --muted: #a0a3a9;
    --line: #2c2e32;
    --chip: #26282c;
    --chip-on: #e9e9e6;
    --chip-on-ink: #121315;
    --accent-hf: #7aa7ff;
    --accent-pk: #ff9a5c;
    --code: #232529;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { background: var(--bg); }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
.wrap { max-width: 1360px; margin: 0 auto; padding-left: 20px; padding-right: 20px; }
.top { padding-block: 28px 12px; }
h1 { font-size: 1.75rem; line-height: 1.2; margin: 0 0 6px; letter-spacing: -0.01em; }
.lede { margin: 0 0 10px; color: var(--muted); font-size: 1.02rem; }
.facts { margin: 0; padding-left: 1.1em; color: var(--muted); font-size: 0.92rem; }
.facts li { margin: 2px 0; }
.filters {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 5;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
.filters .wrap { display: flex; flex-wrap: wrap; gap: 8px; padding-block: 10px; }
.chip {
  border: 0;
  border-radius: 999px;
  padding: 6px 12px;
  background: var(--chip);
  color: var(--ink);
  font: inherit;
  font-size: 0.88rem;
  cursor: pointer;
}
.chip[aria-pressed="true"] { background: var(--chip-on); color: var(--chip-on-ink); }
.chip .n { opacity: 0.6; margin-left: 4px; }
main { padding-block: 18px 30px; display: grid; gap: 22px; }
.case {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 18px 14px;
}
.case-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 10px; margin-bottom: 10px; }
.case-id { font-variant-numeric: tabular-nums; color: var(--muted); font-size: 0.85rem; }
.case-cat {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--chip);
  color: var(--muted);
}
.case-caption { font-size: 1.05rem; margin: 0; flex-basis: 100%; font-weight: 600; }
.refs { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 10px; }
.ref { margin: 0; display: flex; flex-direction: column; gap: 4px; max-width: 100%; }
.ref .lbl { font-size: 0.78rem; color: var(--muted); }
.ref img, .ref video { height: 96px; width: auto; max-width: 100%; border-radius: 8px; display: block; background: #000; }
.ref audio { width: 260px; max-width: 100%; height: 36px; }
.prompt { margin-bottom: 12px; }
.prompt summary, .note summary { cursor: pointer; color: var(--muted); font-size: 0.9rem; }
.prompt pre {
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--code);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 0.82rem;
  line-height: 1.45;
  margin: 8px 0 0;
  max-height: 340px;
  overflow: auto;
}
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.side { margin: 0; min-width: 0; }
.side figcaption { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 6px; }
.side .model { font-weight: 650; font-size: 0.95rem; }
.side[data-side="hyperflow"] .model { color: var(--accent-hf); }
.side[data-side="pika"] .model { color: var(--accent-pk); }
.frame { position: relative; aspect-ratio: 1344 / 768; background: #000; border-radius: 10px; overflow: hidden; }
.frame video { width: 100%; height: 100%; display: block; object-fit: contain; }
.na { position: absolute; inset: 0; display: grid; place-items: center; color: #ddd; padding: 16px; text-align: center; font-size: 0.9rem; }
.snd, .play {
  font: inherit;
  font-size: 0.82rem;
  border: 1px solid var(--line);
  background: var(--chip);
  color: var(--ink);
  border-radius: 8px;
  padding: 4px 10px;
  cursor: pointer;
}
.snd[aria-pressed="true"] { background: var(--chip-on); color: var(--chip-on-ink); border-color: var(--chip-on); }
.controls { display: flex; align-items: center; gap: 12px; margin-top: 10px; }
.play { min-width: 74px; font-weight: 600; }
.seek { flex: 1; min-width: 0; accent-color: var(--ink); }
.time { font-variant-numeric: tabular-nums; color: var(--muted); font-size: 0.85rem; min-width: 92px; text-align: right; }
.note { margin-top: 8px; }
.note p { margin: 6px 0 0; color: var(--muted); font-size: 0.88rem; }
.foot { color: var(--muted); font-size: 0.85rem; padding-block: 10px 36px; }
.foot h3 { font-size: 0.95rem; color: var(--ink); margin: 14px 0 4px; }
.foot table { border-collapse: collapse; font-size: 0.8rem; }
.foot .tbl { overflow-x: auto; }
.foot td, .foot th { border-bottom: 1px solid var(--line); padding: 4px 8px; text-align: left; vertical-align: top; }
[hidden] { display: none !important; }
@media (max-width: 760px) {
  .wrap { padding-left: 16px; padding-right: 16px; }
  h1 { font-size: 1.4rem; }
  .pair { grid-template-columns: 1fr; }
  .ref img, .ref video { height: 76px; }
  .case { padding: 14px 14px 12px; }
  .filters .wrap { flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; }
  .chip { flex: 0 0 auto; }
}