:root {
  --bg: #f7f6f2;
  --surface: #ffffff;
  --ink: #1d2126;
  --muted: #5b6470;
  --line: #e2dfd7;
  --accent: #1f5f8b;
  --accent-ink: #ffffff;
  --top: #1f7a4d;
  --strong: #1f6f8b;
  --moderate: #a86a12;
  --weak: #6b7280;
  --flagged: #a63d3d;
  --ctl: #7a8290;
  --mono: ui-monospace, "Cascadia Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, "Segoe UI", Inter, Roboto, system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #15181c; --surface: #1d2126; --ink: #e8e6e1; --muted: #a2a9b3; --line: #2d333b;
    --accent: #7fb6dc; --accent-ink: #0f1418; --top: #5cc48f; --strong: #6fb8d6; --moderate: #e0a24a;
    --weak: #9aa3ae; --flagged: #e07a7a; --ctl: #8a93a0;
  }
}
:root[data-theme="dark"] {
  --bg: #15181c; --surface: #1d2126; --ink: #e8e6e1; --muted: #a2a9b3; --line: #2d333b;
  --accent: #7fb6dc; --accent-ink: #0f1418; --top: #5cc48f; --strong: #6fb8d6; --moderate: #e0a24a;
  --weak: #9aa3ae; --flagged: #e07a7a; --ctl: #8a93a0;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink); font-family: var(--sans);
  font-size: 16px; line-height: 1.5;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

header.top {
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding: 14px 16px; border-bottom: 1px solid var(--line); background: var(--surface);
  position: sticky; top: 0; z-index: 2;
}
.brand { font-weight: 700; font-size: 18px; letter-spacing: .01em; color: var(--ink); }
.brand span { color: var(--accent); }
header nav { display: flex; gap: 4px; flex-wrap: wrap; }
header nav a { padding: 6px 10px; border-radius: 6px; color: var(--muted); font-size: 14px; }
header nav a:hover { background: var(--bg); color: var(--ink); text-decoration: none; }

main { max-width: 1120px; margin: 0 auto; padding: 24px 16px 48px; }
h1 { font-size: 28px; margin: 0 0 6px; line-height: 1.2; }
h2 { font-size: 19px; margin: 28px 0 10px; }
h3 { font-size: 16px; margin: 0 0 6px; }
.lede { color: var(--muted); margin: 0 0 18px; max-width: 72ch; }
.note { color: var(--muted); font-size: 13px; max-width: 80ch; }
section { margin-bottom: 8px; }
section.two { display: grid; grid-template-columns: 1fr; gap: 24px; }
@media (min-width: 820px) { section.two { grid-template-columns: 1fr 1fr; } }

.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; margin: 12px 0 18px; }
.tile { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; }
.tile .label { font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.tile .value { font-size: 24px; font-weight: 700; margin: 2px 0; font-variant-numeric: tabular-nums; }
.tile .detail { font-size: 12px; color: var(--muted); }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; margin: 12px 0 18px; }
.card {
  display: block; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px;
  color: var(--ink);
}
.card:hover { border-color: var(--accent); text-decoration: none; }
.card .big { font-size: 30px; font-weight: 700; font-variant-numeric: tabular-nums; line-height: 1.1; }
.card .big small { font-size: 14px; font-weight: 400; color: var(--muted); }
.card .detail { font-size: 13px; color: var(--muted); margin-top: 6px; }
.card .tiers { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 8px; }

.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
table.data { border-collapse: collapse; width: 100%; font-size: 14px; }
table.data th, table.data td { padding: 8px 10px; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; vertical-align: middle; }
table.data thead th { position: sticky; top: 0; background: var(--surface); font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
table.data tbody tr:last-child td { border-bottom: 0; }
table.data tbody tr:hover td { background: color-mix(in srgb, var(--accent) 6%, transparent); }
table.compact th, table.compact td { padding: 6px 10px; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
td.score { font-weight: 700; }
td.tick { font-weight: 600; font-family: var(--mono); }
td.mono { font-family: var(--mono); font-size: 13px; }
td.gate { color: var(--muted); font-size: 13px; max-width: 28ch; white-space: normal; }
.ctl { color: var(--ctl); font-style: italic; }
th.ctl { text-transform: none; letter-spacing: 0; }

.tier { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; border: 1px solid currentColor; }
.tier-top { color: var(--top); }
.tier-strong { color: var(--strong); }
.tier-moderate { color: var(--moderate); }
.tier-weak { color: var(--weak); }
.tier-flagged { color: var(--flagged); }
.tier-none { color: var(--muted); }

.spark { display: block; }
.spark polyline { stroke: var(--accent); stroke-width: 1.6; stroke-linejoin: round; stroke-linecap: round; }
.spark-zero { stroke: var(--line); stroke-width: 1; stroke-dasharray: 2 2; }
.spark-big { margin: 8px 0 10px; }
.spark-big .spark polyline { stroke-width: 2; }

ul.obs { padding-left: 20px; }
ul.obs li { margin-bottom: 8px; max-width: 90ch; }
ul.obs strong { color: var(--ink); }
ul.obs.small li { font-size: 13px; color: var(--muted); font-family: var(--mono); margin-bottom: 3px; }

footer { border-top: 1px solid var(--line); padding: 18px 16px 28px; color: var(--muted); font-size: 13px; }
footer p { max-width: 1120px; margin: 0 auto 8px; }