:root {
  --bg: #f6f7f9; --surface: #ffffff; --ink: #181b20; --muted: #5b6370; --line: #e1e4ea; --accent: #2457c5;
  --code: #f2f4f7; --radius: 10px;
  /* status: fixed steps, always paired with an icon and a label */
  --good: #0ca30c; --warning: #fab219; --critical: #d03b3b; --neutral: #8a909b;
  --good-bg: #e5f3ea; --good-ink: #1c5b32; --warn-bg: #fff3d6; --warn-ink: #6f4e00;
  --bad-bg: #fbe7e6; --bad-ink: #8f1f1a; --mute-bg: #eceef2; --mute-ink: #3f4652;
  --track: #e9ebef;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #121418; --surface: #1a1d23; --ink: #e8eaee; --muted: #a2a9b4; --line: #2c3139; --accent: #7aa2ff;
    --code: #14171c; --neutral: #8e95a0;
    --good-bg: #163222; --good-ink: #9fdcb4; --warn-bg: #3a2f10; --warn-ink: #f0cf78;
    --bad-bg: #3a1a19; --bad-ink: #f4a7a2; --mute-bg: #262a31; --mute-ink: #c3c8d0; --track: #2a2f37;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #121418; --surface: #1a1d23; --ink: #e8eaee; --muted: #a2a9b4; --line: #2c3139; --accent: #7aa2ff;
  --code: #14171c; --neutral: #8e95a0;
  --good-bg: #163222; --good-ink: #9fdcb4; --warn-bg: #3a2f10; --warn-ink: #f0cf78;
  --bad-bg: #3a1a19; --bad-ink: #f4a7a2; --mute-bg: #262a31; --mute-ink: #c3c8d0; --track: #2a2f37;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent); }
.wrap { max-width: 1000px; margin: 0 auto; padding: 0 16px; }
.top { background: var(--surface); border-bottom: 1px solid var(--line); padding: 28px 0 18px; }
h1 { margin: 0 0 6px; font-size: 1.9rem; letter-spacing: -0.01em; }
h2 { font-size: 1.05rem; margin: 0 0 8px; }
h3 { font-size: 0.98rem; margin: 16px 0 6px; }
.lede { margin: 0 0 14px; max-width: 76ch; }
.small { color: var(--muted); font-size: 0.86rem; font-weight: normal; }
.scores { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 10px; }
.score { border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 12px; background: var(--bg); }
.score b { display: block; font-size: 1.4rem; font-variant-numeric: tabular-nums; }
.score span { color: var(--muted); font-size: 0.82rem; }
.score-note { margin: 10px 0 0; }

.tabs { display: flex; gap: 4px; flex-wrap: wrap; margin-top: 16px; border-bottom: 1px solid var(--line); }
.tabs button { font: inherit; font-weight: 600; background: none; border: 0; border-bottom: 3px solid transparent;
  color: var(--muted); padding: 8px 12px; cursor: pointer; }
.tabs button[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--accent); }
.tabs button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; margin: 16px 0; }
.controls { display: flex; flex-wrap: wrap; gap: 10px 16px; align-items: center; margin: 14px 0 6px; }
label { font-size: 0.88rem; display: inline-flex; flex-direction: column; gap: 3px; color: var(--muted); }
.controls label { flex-direction: row; align-items: center; gap: 6px; }
.controls label { max-width: 100%; min-width: 0; }
.controls select { max-width: 100%; min-width: 0; text-overflow: ellipsis; }
#example { width: min(560px, 100%); }
input, select, textarea { font: inherit; font-size: 0.92rem; color: var(--ink); background: var(--surface);
  border: 1px solid var(--line); border-radius: 8px; padding: 6px 8px; min-width: 0; }
input:focus-visible, select:focus-visible, textarea:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.btn { font: inherit; font-size: 0.9rem; border: 1px solid var(--line); background: var(--bg); color: var(--ink);
  border-radius: 8px; padding: 6px 12px; cursor: pointer; }
.btn:hover { border-color: var(--accent); }
.grid4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 10px 14px; margin: 8px 0; }
.hypothesis { margin: 4px 0 0; color: var(--muted); font-size: 0.95rem; max-width: 80ch; }

/* verdict */
.verdict-card { background: var(--surface); border: 1px solid var(--line); border-left-width: 6px; border-radius: var(--radius);
  padding: 16px 18px; margin: 14px 0; }
.verdict-card.roll_out { border-left-color: var(--good); }
.verdict-card.iterate, .verdict-card.keep_running { border-left-color: var(--warning); }
.verdict-card.kill, .verdict-card.fix_data { border-left-color: var(--critical); }
.verdict-top { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.verdict-label { font-size: 1.5rem; font-weight: 700; letter-spacing: -0.01em; }
.vbadge { display: inline-flex; align-items: center; gap: 5px; border-radius: 999px; padding: 2px 10px; font-size: 0.82rem; font-weight: 600; }
.vbadge.roll_out { background: var(--good-bg); color: var(--good-ink); }
.vbadge.iterate, .vbadge.keep_running { background: var(--warn-bg); color: var(--warn-ink); }
.vbadge.kill, .vbadge.fix_data { background: var(--bad-bg); color: var(--bad-ink); }
.verdict-card .headline { margin: 8px 0 6px; font-size: 1.02rem; }
.verdict-card .next { margin: 0; color: var(--muted); }
.versus { margin: 10px 0 0; font-size: 0.88rem; color: var(--muted); }

/* steps */
.step { border-top: 1px solid var(--line); padding: 10px 0 4px; }
.step:first-child { border-top: 0; padding-top: 0; }
.step h3 { margin: 0 0 6px; display: flex; align-items: center; gap: 8px; }
.items { list-style: none; margin: 0; padding: 0; }
.items li { display: grid; grid-template-columns: 22px 1fr; gap: 6px; margin: 6px 0; font-size: 0.93rem; }
.items li b { font-weight: 600; }
.icon { display: inline-grid; place-items: center; width: 18px; height: 18px; border-radius: 50%; font-size: 0.72rem;
  font-weight: 700; line-height: 1; color: #fff; flex: none; margin-top: 2px; }
.icon.pass { background: var(--good); }
.icon.warn { background: var(--warning); color: #3a2a00; }
.icon.fail { background: var(--critical); }
.icon.info { background: var(--neutral); }
.extra { margin: 8px 0 0; padding-left: 18px; font-size: 0.9rem; color: var(--muted); }

/* chart: one row per metric, own scale, right = better */
.chart { display: grid; gap: 4px; }
.crow { display: grid; grid-template-columns: minmax(120px, 230px) 1fr 110px; gap: 10px; align-items: center;
  padding: 4px 0; border-radius: 6px; }
.crow:hover { background: var(--bg); }
.cname { font-size: 0.88rem; line-height: 1.25; }
.cname .role { display: block; color: var(--muted); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.04em; }
.ctrack { position: relative; height: 30px; }
.ctrack .base { position: absolute; left: 0; right: 0; top: 14px; height: 2px; background: var(--track); border-radius: 2px; }
.ctrack .zero { position: absolute; top: 4px; bottom: 4px; width: 2px; margin-left: -1px; background: var(--muted); opacity: 0.6; }
.ctrack .thr { position: absolute; top: 2px; bottom: 2px; width: 0; margin-left: -1px; border-left: 2px dashed var(--muted); }
.ctrack .thr.mwe { border-left-color: var(--good); }
.ctrack .thr.margin { border-left-color: var(--critical); }
.ctrack .ci { position: absolute; top: 12px; height: 6px; border-radius: 4px; }
.ctrack .dot { position: absolute; top: 9px; width: 12px; height: 12px; margin-left: -6px; border-radius: 50%;
  box-shadow: 0 0 0 2px var(--surface); }
.pass-c { background: var(--good); }
.warn-c { background: var(--warning); }
.fail-c { background: var(--critical); }
.info-c { background: var(--neutral); }
.cstat { font-size: 0.82rem; display: flex; align-items: center; gap: 6px; }
.caxis { display: grid; grid-template-columns: minmax(120px, 230px) 1fr 110px; gap: 10px; font-size: 0.75rem; color: var(--muted); }
.caxis div:nth-child(2) { display: flex; justify-content: space-between; }
.chart-key { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 8px; }
.chart-key .tick { display: inline-block; width: 0; height: 12px; border-left: 2px dashed var(--muted); vertical-align: -2px; margin-right: 4px; }
.chart-key .tick.mwe { border-left-color: var(--good); }
.chart-key .tick.margin { border-left-color: var(--critical); }
.chart-key .tick.zero { border-left-style: solid; }
.tooltip { position: fixed; z-index: 10; max-width: 300px; background: var(--ink); color: var(--surface); font-size: 0.82rem;
  padding: 6px 9px; border-radius: 6px; pointer-events: none; line-height: 1.4; }

/* tables */
.table-scroll { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 0.88rem; }
th, td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { color: var(--muted); font-weight: 600; font-size: 0.8rem; white-space: nowrap; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.metrics-table input, .metrics-table select { width: 100%; min-width: 72px; padding: 4px 6px; }
.metrics-table td:first-child input { min-width: 160px; }
.metrics-table select[data-k="role"] { min-width: 112px; }
.metrics-table select[data-k="better"] { min-width: 80px; }
.metrics-table input[type="number"] { min-width: 84px; }
.metrics-table .rm { border: 0; background: none; color: var(--muted); cursor: pointer; font-size: 1.1rem; padding: 2px 6px; }
.data td b { font-variant-numeric: tabular-nums; }
.data .us { background: var(--bg); }
details summary { cursor: pointer; }
details#editor > summary { list-style: none; }
details#editor > summary h2 { display: inline; }
details#editor > summary::before { content: "▸ "; color: var(--muted); }
details#editor[open] > summary::before { content: "▾ "; }
details.json { margin-top: 12px; }
details.json summary { color: var(--accent); font-size: 0.9rem; }
textarea { width: 100%; font: 0.78rem/1.45 ui-monospace, "Cascadia Mono", Consolas, monospace; background: var(--code); }

/* plan output */
.plan-tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 10px; margin: 10px 0; }
.plan-tile { border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; background: var(--surface); }
.plan-tile b { display: block; font-size: 1.35rem; font-variant-numeric: tabular-nums; }
.plan-tile.main { border-color: var(--accent); }

/* benchmark cards */
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; margin: 0 0 10px; }
.card-top { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; font-size: 0.85rem; }
.cid { font-weight: 700; color: var(--muted); margin-right: 2px; }
.tag { border-radius: 999px; padding: 1px 9px; font-size: 0.78rem; background: var(--mute-bg); color: var(--mute-ink); }
.tag.right { background: var(--good-bg); color: var(--good-ink); font-weight: 600; }
.tag.wrong { background: var(--bad-bg); color: var(--bad-ink); font-weight: 600; }
.tag.missed { background: var(--warn-bg); color: var(--warn-ink); font-weight: 600; }
.card h3 { margin: 6px 0 2px; font-size: 1rem; }
.card p { margin: 4px 0; font-size: 0.9rem; }
.calls { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 8px 0 4px; font-size: 0.85rem; }
.calls div { background: var(--bg); border-radius: 8px; padding: 6px 8px; }
.calls span { display: block; color: var(--muted); font-size: 0.75rem; }
.how ol { margin: 0 0 10px; padding-left: 20px; }
.how li { margin: 6px 0; }
.foot { padding: 20px 16px 40px; }

@media (max-width: 700px) {
  h1 { font-size: 1.55rem; }
  .crow, .caxis { grid-template-columns: 1fr; gap: 2px; }
  .caxis div:first-child, .caxis div:last-child { display: none; }
  .crow { padding: 6px 0; border-bottom: 1px solid var(--line); }
  .calls { grid-template-columns: 1fr; }
  .verdict-label { font-size: 1.3rem; }
}
@media (forced-colors: active) {
  .ctrack .ci, .ctrack .dot, .icon { forced-color-adjust: none; border: 1px solid CanvasText; }
}