:root {
  --bg: #fbfbf9; --surface: #ffffff; --ink: #1b1f24; --muted: #5b6470; --faint: #8a929c;
  --line: #e6e4df; --accent: #18453b; --accent-soft: #e7efe9; --chip: #f1f0ec;
  --c-base: #c2410c; --c-ours: #1d4ed8; --c-good: #15803d; --c-bad: #b91c1c; --c-aux: #b45309;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121416; --surface: #1a1d20; --ink: #e8e6e1; --muted: #a3a9b1; --faint: #7d848c;
    --line: #2b2f33; --accent: #7fc4a8; --accent-soft: #1f3029; --chip: #24282c;
    --c-base: #fb923c; --c-ours: #60a5fa; --c-good: #4ade80; --c-bad: #f87171; --c-aux: #fbbf24;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.55 Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent); }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 20px 60px; }
header.top { padding: 28px 0 8px; }
.back { font-size: 13px; text-decoration: none; }
h1 { font-family: "Source Serif 4", Georgia, serif; font-size: 32px; line-height: 1.15; margin: 8px 0 6px; }
.lede { color: var(--muted); max-width: 80ch; margin: 0 0 6px; }
.lede b { color: var(--ink); }

/* controls */
.controls {
  position: sticky; top: 0; z-index: 5;
  display: flex; flex-wrap: wrap; gap: 10px 18px; align-items: center;
  padding: 12px 14px; margin: 14px 0 6px;
  background: color-mix(in srgb, var(--surface) 92%, transparent); backdrop-filter: blur(6px);
  border: 1px solid var(--line); border-radius: 12px;
}
.ctl { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); }
.ctl b { color: var(--ink); font-variant-numeric: tabular-nums; min-width: 4.5ch; display: inline-block; }
.ctl input[type=range] { width: 150px; accent-color: var(--accent); }
.ctl select, .ctl input[type=number] { font: inherit; padding: 3px 6px; border: 1px solid var(--line); border-radius: 6px; background: var(--surface); color: var(--ink); }
.ctl input[type=number] { width: 70px; }
button.btn {
  font: inherit; font-size: 13px; font-weight: 600; cursor: pointer;
  padding: 6px 12px; border-radius: 8px; border: 1px solid var(--accent);
  background: var(--accent); color: var(--surface);
}
button.btn.ghost { background: transparent; color: var(--accent); }
button.btn:disabled { opacity: .5; cursor: progress; }

/* sections and panels */
section { margin-top: 26px; }
h2 { font-family: "Source Serif 4", Georgia, serif; font-size: 22px; margin: 0 0 4px; display: flex; gap: 10px; align-items: baseline; flex-wrap: wrap; }
h2 .tag { font-family: Inter, system-ui, sans-serif; font-size: 12px; font-weight: 600; padding: 2px 8px; border-radius: 6px; }
.tag.base { background: color-mix(in srgb, var(--c-base) 15%, transparent); color: var(--c-base); }
.tag.ours { background: color-mix(in srgb, var(--c-ours) 15%, transparent); color: var(--c-ours); }
.sec-note { color: var(--muted); font-size: 14px; margin: 0 0 12px; max-width: 90ch; }
.grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px 8px; min-width: 0; }
.panel h3 { font-size: 13px; font-weight: 600; margin: 0 0 2px; display: flex; justify-content: space-between; gap: 8px; }
.panel h3 .step { color: var(--faint); font-weight: 600; }
.panel p.cap { font-size: 12.5px; color: var(--muted); margin: 0 0 6px; min-height: 2.6em; }
.panel canvas { width: 100%; aspect-ratio: 16 / 10; display: block; }
.panel canvas.tall { aspect-ratio: 4 / 3; }
.panel canvas.short { aspect-ratio: 16 / 7; }
.verdict { font-size: 13px; font-weight: 700; margin-top: 4px; min-height: 1.4em; }
.verdict.ok { color: var(--c-good); }
.verdict.bad { color: var(--c-bad); }
.kv { font-size: 12.5px; color: var(--muted); font-variant-numeric: tabular-nums; }
.kv b { color: var(--ink); }
.trials { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.bar-row { display: grid; grid-template-columns: 130px 1fr 60px; gap: 8px; align-items: center; font-size: 13px; }
.bar { height: 14px; border-radius: 4px; background: var(--chip); overflow: hidden; }
.bar > i { display: block; height: 100%; }
footer { margin-top: 40px; font-size: 12.5px; color: var(--faint); border-top: 1px solid var(--line); padding-top: 14px; }

@media (max-width: 860px) {
  .grid, .grid.two { grid-template-columns: 1fr; }
  .ctl input[type=range] { width: 120px; }
  h1 { font-size: 26px; }
}