:root {
  --bg: #f7f7f5; --panel: #ffffff; --ink: #1c1c1a; --muted: #6b6b66;
  --line: #e2e1dc; --accent: #2563eb; --accent-soft: #dbe6fd;
  --good: #15803d; --bad: #b45309; --mono: ui-monospace, "SF Mono", Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #141412; --panel: #1d1d1a; --ink: #ecebe6; --muted: #9a9993;
    --line: #2f2e2a; --accent: #60a5fa; --accent-soft: #1e3a5f;
    --good: #4ade80; --bad: #fbbf24;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; }
.page { max-width: 1180px; margin: 0 auto; padding: 20px 16px 32px; }
header { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; margin-bottom: 16px; }
h1 { margin: 0; font-size: 26px; letter-spacing: .02em; }
.sub { margin: 2px 0 0; color: var(--muted); }
button { font: inherit; cursor: pointer; border: 1px solid var(--line); background: var(--panel);
  color: var(--ink); border-radius: 8px; padding: 6px 12px; }
button:hover { border-color: var(--accent); }
.toggle.on { background: var(--accent); color: #fff; border-color: var(--accent); }
main { display: grid; gap: 16px; }
main.split { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
@media (max-width: 800px) { main.split { grid-template-columns: 1fr; } }
section { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 16px; min-width: 0; }
.chat { display: flex; flex-direction: column; gap: 12px; }
.log { display: flex; flex-direction: column; gap: 8px; min-height: 240px; max-height: 60vh; overflow-y: auto; }
.exchange { border-radius: 8px; padding: 8px 10px; cursor: pointer; border: 1px solid transparent; }
.exchange:hover { border-color: var(--line); }
.exchange.chosen { border-color: var(--accent); background: var(--accent-soft); }
.exchange p { margin: 2px 0; }
.exchange span { display: inline-block; min-width: 64px; font: 600 12px var(--mono); color: var(--muted); }
.them { font-weight: 500; }
.hint { color: var(--muted); }
.examples { display: flex; flex-wrap: wrap; gap: 6px; }
.examples button { font-size: 13px; padding: 4px 10px; border-radius: 999px; }
.say { display: flex; gap: 8px; }
.say input { flex: 1; min-width: 0; font: inherit; padding: 8px 10px; border-radius: 8px;
  border: 1px solid var(--line); background: var(--bg); color: var(--ink); }
.trace h2 { font-size: 12px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted);
  margin: 18px 0 6px; }
.trace h2:first-child { margin-top: 0; }
.aside { text-transform: none; letter-spacing: 0; font-weight: 400; }
.quote { margin: 0; font-size: 16px; }
.meta { margin: 2px 0; color: var(--muted); font-size: 13px; }
.mono { font: 13px var(--mono); margin: 4px 0; overflow-wrap: anywhere; }
.chips { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 6px; }
.chip { font: 12px var(--mono); padding: 1px 6px; border: 1px solid var(--line); border-radius: 4px; }
.bars { display: grid; gap: 3px; }
.bar { display: grid; grid-template-columns: 92px 1fr 48px; align-items: center; gap: 8px; font: 13px var(--mono); }
.bar .track { height: 12px; background: var(--bg); border-radius: 3px; overflow: hidden; }
.bar .fill { display: block; height: 100%; background: var(--muted); opacity: .45; }
.bar.top .fill { background: var(--accent); opacity: 1; }
.bar.top .label { font-weight: 700; }
.num { text-align: right; }
.agree { color: var(--good); }
.disagree { color: var(--bad); }
footer { margin-top: 20px; color: var(--muted); font-size: 13px; }
footer p { margin: 4px 0; }
footer a { color: var(--accent); }
footer .build { font-size: 12px; }
footer code { font-family: var(--mono); }
.timeline { margin-bottom: 16px; }
.tl-head h2 { font-size: 12px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin: 0; }
.tl-head .meta { margin: 2px 0 10px; }
.tl-body { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: 16px; align-items: center; }
@media (max-width: 800px) { .tl-body { grid-template-columns: 1fr; } }
.tl-pick { display: flex; flex-wrap: wrap; gap: 6px; }
.snap { display: flex; flex-direction: column; align-items: flex-start; padding: 6px 10px; min-width: 88px; }
.snap .t { font-weight: 600; }
.snap .st { font: 11px var(--mono); color: var(--muted); }
.snap.on { border-color: var(--accent); background: var(--accent-soft); }
.chart { width: 100%; max-width: 420px; height: auto; display: block; }
.chart .axis { stroke: var(--line); stroke-width: 1; }
.chart .faint { stroke-dasharray: 2 3; }
.chart .cursor { stroke: var(--muted); stroke-width: 1; stroke-dasharray: 3 3; }
.chart polyline { fill: none; stroke-width: 2.5; }
.chart .acc { stroke: var(--accent); }
.chart .conf { stroke: var(--bad); stroke-dasharray: 6 4; }
.legend { margin: 4px 0 0; font-size: 12px; color: var(--muted); display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.legend .k { display: inline-block; width: 18px; height: 0; border-top: 2.5px solid; margin-left: 8px; }
.legend .k.acc { border-color: var(--accent); }
.legend .k.conf { border-color: var(--bad); border-top-style: dashed; }
.legend .k:first-child { margin-left: 0; }
.tl-nums p { margin: 1px 0; white-space: pre; }
.reading { margin: 10px 0 0; font-size: 14px; }
.exchange.opening { cursor: default; }
.exchange.opening:hover { border-color: transparent; }