:root {
  color-scheme: light dark;
  --bg: #f7f7f8; --fg: #1c1c1f; --muted: #6b6b73; --panel: #ffffff; --line: #d9d9de;
  --accent: #2563eb; --accent-fg: #ffffff; --pick: #16a34a; --err: #b91c1c;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #131316; --fg: #e8e8ec; --muted: #9a9aa3; --panel: #1c1c21; --line: #33333a;
          --accent: #60a5fa; --accent-fg: #0b0b0d; --pick: #4ade80; --err: #f87171; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 14px/1.4 system-ui, -apple-system, "Segoe UI", sans-serif; }
a { color: var(--accent); }
.bar { display: flex; gap: 14px; align-items: center; padding: 8px 16px; border-bottom: 1px solid var(--line);
       background: var(--panel); position: sticky; top: 0; z-index: 2; flex-wrap: wrap; }
.spacer { flex: 1; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.strong { font-weight: 600; }
.hidden { display: none !important; }
main { padding: 12px 16px; max-width: 1800px; margin: 0 auto; }
button { font: inherit; padding: 6px 12px; border: 1px solid var(--line); border-radius: 6px; background: var(--panel);
         color: var(--fg); cursor: pointer; }
button:hover:not(:disabled) { border-color: var(--accent); }
button:disabled { opacity: 0.55; cursor: default; }
button.link { border: none; padding: 0; background: none; color: var(--accent); text-decoration: underline; }
kbd { font: 11px ui-monospace, Menlo, monospace; border: 1px solid var(--line); border-bottom-width: 2px;
      border-radius: 4px; padding: 0 4px; background: var(--bg); }

.prompt { background: var(--panel); border: 1px solid var(--line); border-radius: 6px; padding: 6px 10px; margin-bottom: 10px; }
.prompt summary { cursor: pointer; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.prompt pre { white-space: pre-wrap; font: 13px/1.45 system-ui, sans-serif; max-height: 40vh; overflow: auto; margin: 8px 0 0; }

.stage { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.pane { margin: 0; min-width: 0; }
.pane figcaption { display: flex; gap: 8px; align-items: center; margin-bottom: 4px; min-height: 22px; }
.tag { font-weight: 600; }
.reveal { color: var(--pick); font-weight: 600; }
.viewport { background: #000; border-radius: 6px; overflow: hidden; display: flex; justify-content: center;
            align-items: center; height: 68vh; }
.viewport video { max-width: 100%; max-height: 100%; display: block; cursor: pointer; }
.viewport.zoom { display: block; overflow: auto; }
.viewport.zoom video { max-width: none; max-height: none; }

.transport { display: flex; gap: 12px; align-items: center; margin: 10px 0; flex-wrap: wrap; }
.transport input[type=range] { flex: 1; min-width: 200px; }
.vote { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.vote .choice { padding: 10px 18px; font-weight: 600; }
.vote .choice.picked { background: var(--accent); color: var(--accent-fg); opacity: 1; }
.vote.disabled .choice:not(.picked) { opacity: 0.4; }
.vote input[type=text] { flex: 1; min-width: 220px; padding: 9px 10px; border: 1px solid var(--line); border-radius: 6px;
                         background: var(--panel); color: var(--fg); font: inherit; }
.after { margin-top: 10px; display: flex; gap: 12px; align-items: center; }
.status { min-height: 1.4em; }
.status.error { color: var(--err); }

table { border-collapse: collapse; background: var(--panel); }
th, td { border: 1px solid var(--line); padding: 5px 9px; text-align: left; vertical-align: middle; }
th { font-weight: 600; background: var(--bg); }
td.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
td.diag { background: var(--bg); }
.matrix td { text-align: center; }
.scroll { overflow-x: auto; }
h2 { font-size: 16px; margin: 20px 0 8px; }
svg .ref { stroke: var(--line); stroke-width: 1; stroke-dasharray: 3 3; }
svg .ci { stroke: var(--accent); stroke-width: 3; stroke-linecap: round; opacity: 0.5; }
svg .pt { fill: var(--accent); }
svg .tick, svg .axis { fill: var(--muted); font-size: 11px; }
svg .label { fill: var(--fg); font-size: 12px; }
.chart { background: var(--panel); border: 1px solid var(--line); border-radius: 6px; max-width: 100%; height: auto; }
@media (max-width: 900px) { .stage { grid-template-columns: 1fr; } .viewport { height: 45vh; } }
.vote .choice.picked kbd { background: transparent; color: inherit; border-color: currentColor; }