:root {
  --bg: #f6f7f7; --surface: #ffffff; --surface-2: #eef2f2; --ink: #142224; --ink-2: #4b5c5f; --line: #d9e1e2;
  --accent: #007a7a; --accent-ink: #ffffff; --accent-soft: #dff1f1;
  --good: #1f7a3f; --good-soft: #e3f3e8; --bad: #a3262a; --bad-soft: #f8e4e4; --warn: #8a5a00; --warn-soft: #fbefd6;
  --mid: #3d5a80; --mid-soft: #e4ebf5;
  --radius: 10px; --shadow: 0 1px 2px rgba(20, 34, 36, .06), 0 4px 14px rgba(20, 34, 36, .05);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1516; --surface: #172022; --surface-2: #1d2a2c; --ink: #e6eeee; --ink-2: #9fb2b4; --line: #2b3a3c;
    --accent: #3cc1c1; --accent-ink: #082122; --accent-soft: #163536;
    --good: #6fd08f; --good-soft: #17301f; --bad: #f08a8d; --bad-soft: #3a1d1e; --warn: #f0c062; --warn-soft: #3a2f16;
    --mid: #9fb8e0; --mid-soft: #1f2a3c; --shadow: none; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0f1516; --surface: #172022; --surface-2: #1d2a2c; --ink: #e6eeee; --ink-2: #9fb2b4; --line: #2b3a3c;
  --accent: #3cc1c1; --accent-ink: #082122; --accent-soft: #163536;
  --good: #6fd08f; --good-soft: #17301f; --bad: #f08a8d; --bad-soft: #3a1d1e; --warn: #f0c062; --warn-soft: #3a2f16;
  --mid: #9fb8e0; --mid-soft: #1f2a3c; --shadow: none; color-scheme: dark;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.55 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
code, .mono { font-family: ui-monospace, "Cascadia Code", Consolas, monospace; font-size: .9em; }
a { color: var(--accent); }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 16px; }
.top { position: sticky; top: 0; z-index: 5; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.top-inner { display: flex; align-items: center; gap: 20px; min-height: 56px; }
.brand { font-weight: 700; display: flex; align-items: center; gap: 10px; white-space: nowrap; }
.mark { width: 22px; height: 22px; border-radius: 6px; background: var(--accent); display: inline-block; }
.nav { display: flex; gap: 14px; overflow-x: auto; scrollbar-width: none; }
.nav a { color: var(--ink-2); text-decoration: none; font-size: 14px; white-space: nowrap; padding: 4px 0; }
.nav a:hover { color: var(--accent); }
section { margin: 40px 0; }
h1 { font-size: clamp(26px, 4vw, 38px); line-height: 1.15; margin: 8px 0 12px; letter-spacing: -.01em; max-width: 22ch; }
h2 { font-size: 22px; margin: 0 0 6px; }
h3 { font-size: 16px; margin: 22px 0 8px; }
.eyebrow { color: var(--accent); font-weight: 600; font-size: 13px; text-transform: uppercase; letter-spacing: .06em; margin: 0; }
.lede { font-size: 17px; color: var(--ink-2); max-width: 70ch; }
.hint { color: var(--ink-2); max-width: 85ch; margin: 0 0 14px; }
.meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 14px; }
.cards .card h3 { margin-top: 0; }
.chip { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 600; padding: 3px 10px; border-radius: 999px; background: var(--surface-2); color: var(--ink-2); border: 1px solid var(--line); white-space: nowrap; }
.chip.good { background: var(--good-soft); color: var(--good); border-color: transparent; }
.chip.bad { background: var(--bad-soft); color: var(--bad); border-color: transparent; }
.chip.warn { background: var(--warn-soft); color: var(--warn); border-color: transparent; }
.chip.mid { background: var(--mid-soft); color: var(--mid); border-color: transparent; }
.verdict { border-left: 4px solid var(--accent); }
.verdict-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.verdict-text { font-size: 19px; font-weight: 600; margin: 10px 0; }
.steps { color: var(--ink-2); padding-left: 20px; margin: 0; }
.steps li { margin: 4px 0; }
.table-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.tbl { border-collapse: collapse; width: 100%; font-size: 14px; }
.tbl th, .tbl td { padding: 9px 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.tbl thead th { background: var(--surface-2); font-size: 12.5px; text-transform: uppercase; letter-spacing: .04em; color: var(--ink-2); position: sticky; top: 0; }
.tbl tbody tr:last-child td { border-bottom: 0; }
.tbl td.num { font-variant-numeric: tabular-nums; font-weight: 600; }
.tbl .sub { display: block; color: var(--ink-2); font-size: 12.5px; font-weight: 400; }
.tbl tr.baseline td { background: color-mix(in srgb, var(--surface-2) 55%, transparent); }
.grid td.cell { cursor: pointer; text-align: center; font-weight: 700; min-width: 64px; }
.grid td.cell:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
.g-N, .o-builtin, .m-direct { background: var(--good-soft); color: var(--good); }
.g-L, .m-composite { background: var(--mid-soft); color: var(--mid); }
.g-E, .o-authored, .m-extension { background: var(--warn-soft); color: var(--warn); }
.g-X, .o-missed, .m-lossy { background: var(--bad-soft); color: var(--bad); }
.o-prevented { background: var(--accent-soft); color: var(--accent); }
.o-na { color: var(--ink-2); }
.detail { display: none; text-align: left; font-weight: 400; color: var(--ink); font-size: 12.5px; margin-top: 6px; }
td.open .detail { display: block; }
.best { box-shadow: inset 0 -3px 0 var(--accent); }
.prose { line-height: 1.6; }
.prose table { border-collapse: collapse; width: 100%; font-size: 14px; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--line); padding: 6px 10px; text-align: left; }
.prose h1 { font-size: 24px; max-width: none; }
.prose h2 { margin-top: 26px; }
.list-tight { margin: 6px 0 0; padding-left: 18px; color: var(--ink-2); font-size: 13.5px; }
.list-tight li { margin: 3px 0; }
.foot { color: var(--ink-2); font-size: 13px; padding-bottom: 40px; }
@media (max-width: 640px) { .top-inner { gap: 12px; } .card { padding: 16px; } .verdict-text { font-size: 17px; } }