:root {
  --bg: #f7f8f7;
  --panel: #ffffff;
  --ink: #1b1f1d;
  --muted: #5b6360;
  --line: #dfe4e1;
  --accent: #1f6f5c;
  --accent-ink: #ffffff;
  --code-bg: #eef2f0;
  --pass: #1f8a4c;  --pass-bg: #e6f5ec;
  --warn: #b26a00;  --warn-bg: #fff3e0;
  --fail: #b3261e;  --fail-bg: #fdecea;
  --info: #3b5b8c;  --info-bg: #e9eff8;
  --unknown: #6b6b6b; --unknown-bg: #efefef;
  --radius: 10px;
  --maxw: 1040px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101413; --panel: #171c1a; --ink: #e8ecea; --muted: #a2aba7; --line: #2a3330;
    --accent: #3fb08f; --accent-ink: #08110e; --code-bg: #1f2624;
    --pass: #5fd08f; --pass-bg: #163123; --warn: #ffb457; --warn-bg: #3a2a10;
    --fail: #ff7b72; --fail-bg: #3d1a18; --info: #8fb4ec; --info-bg: #1a2436;
    --unknown: #b5b5b5; --unknown-bg: #2a2a2a;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
a { color: var(--accent); }
code, pre, var, kbd { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace; font-size: 0.92em; }
code { background: var(--code-bg); padding: 0.1em 0.35em; border-radius: 4px; }
pre { background: var(--code-bg); padding: 0.9rem 1rem; border-radius: var(--radius); overflow-x: auto; line-height: 1.45; }
pre code { background: none; padding: 0; }
pre .c { color: var(--muted); }
var { font-style: normal; color: var(--accent); }
h1, h2, h3 { line-height: 1.2; margin: 0 0 0.6rem; }
h1 { font-size: clamp(1.7rem, 4vw, 2.5rem); letter-spacing: -0.01em; }
h2 { font-size: clamp(1.35rem, 3vw, 1.8rem); margin-top: 0; }
h3 { font-size: 1.1rem; }
p { margin: 0 0 0.9rem; }
.lede { font-size: 1.08rem; color: var(--muted); max-width: 62ch; }
.fineprint { font-size: 0.86rem; color: var(--muted); }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.top {
  max-width: var(--maxw); margin: 0 auto; padding: 1rem 1.25rem;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
}
.brand { display: inline-flex; align-items: center; gap: 0.5rem; font-weight: 700; font-size: 1.15rem; color: var(--ink); text-decoration: none; }
.mark { width: 22px; height: 22px; border-radius: 6px; background: var(--accent); position: relative; }
.mark::after { content: ""; position: absolute; left: 5px; right: 5px; top: 7px; bottom: 5px; background: var(--accent-ink); clip-path: polygon(0 0, 100% 0, 50% 45%, 0 0, 0 100%, 100% 100%, 100% 0); opacity: 0.9; }
.top nav { display: flex; gap: 1.1rem; }
.top nav a { color: var(--muted); text-decoration: none; font-weight: 500; }
.top nav a:hover { color: var(--accent); }

main { max-width: var(--maxw); margin: 0 auto; padding: 0 1.25rem 3rem; }
section { padding: 2.5rem 0; border-top: 1px solid var(--line); }
section.hero { border-top: 0; padding-top: 2rem; }

.check-form { display: flex; gap: 0.6rem; max-width: 640px; margin: 1.2rem 0 0.5rem; }
.check-form input {
  flex: 1; min-width: 0; font-size: 1.1rem; padding: 0.8rem 1rem; border: 1.5px solid var(--line);
  border-radius: var(--radius); background: var(--panel); color: var(--ink);
}
.check-form input:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
.check-form button, .btn {
  font-size: 1.02rem; font-weight: 600; padding: 0.8rem 1.2rem; border: 0; border-radius: var(--radius);
  background: var(--accent); color: var(--accent-ink); cursor: pointer; white-space: nowrap;
}
.check-form button[disabled] { opacity: 0.6; cursor: progress; }
.disclosure { font-size: 0.92rem; padding: 0.7rem 0.9rem; border-left: 3px solid var(--accent); background: var(--panel); border-radius: 0 var(--radius) var(--radius) 0; max-width: 640px; }

.status { margin-top: 1rem; padding: 0.8rem 1rem; border-radius: var(--radius); background: var(--panel); border: 1px solid var(--line); max-width: 640px; }
.status.err { border-color: var(--fail); background: var(--fail-bg); }
.status.busy { border-color: var(--warn); background: var(--warn-bg); }

.result { margin-top: 1.5rem; }
.scorecard {
  display: grid; grid-template-columns: auto 1fr; gap: 1.25rem; align-items: center;
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.25rem;
}
.ring { width: 118px; height: 118px; }
.ring circle { fill: none; stroke-width: 10; }
.ring .track { stroke: var(--code-bg); }
.ring .bar { stroke: var(--accent); stroke-linecap: round; transform: rotate(-90deg); transform-origin: 50% 50%; transition: stroke-dashoffset 0.6s ease; }
.ring .bar.g-A { stroke: var(--pass); } .ring .bar.g-B { stroke: var(--pass); } .ring .bar.g-C { stroke: var(--warn); }
.ring .bar.g-D { stroke: var(--fail); } .ring .bar.g-F { stroke: var(--fail); }
.ring text { font: 700 30px system-ui, sans-serif; fill: var(--ink); }
.ring text.grade { font-size: 13px; font-weight: 600; fill: var(--muted); }
.scorecard h2 { margin: 0 0 0.25rem; font-size: 1.35rem; word-break: break-all; }
.scorecard .meta { color: var(--muted); font-size: 0.92rem; margin: 0 0 0.5rem; }
.scorecard .interp { font-size: 0.92rem; margin: 0; }
.projected { display: inline-block; margin-left: 0.4rem; font-size: 0.85rem; color: var(--muted); }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 0.9rem; margin-top: 0.9rem; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.1rem; }
.card header { display: flex; align-items: center; justify-content: space-between; gap: 0.6rem; margin-bottom: 0.4rem; }
.card h3 { margin: 0; }
.badge { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; padding: 0.2em 0.6em; border-radius: 999px; }
.badge.pass { color: var(--pass); background: var(--pass-bg); }
.badge.warn { color: var(--warn); background: var(--warn-bg); }
.badge.fail { color: var(--fail); background: var(--fail-bg); }
.badge.info { color: var(--info); background: var(--info-bg); }
.badge.unknown, .badge.error { color: var(--unknown); background: var(--unknown-bg); }
.card .issue { margin: 0 0 0.6rem; }
.card .kv { font-size: 0.86rem; color: var(--muted); margin: 0 0 0.5rem; }
.card .kv span { display: inline-block; margin-right: 0.8rem; }
.card pre { margin: 0.4rem 0; font-size: 0.82rem; white-space: pre-wrap; word-break: break-all; }
.fix { border-top: 1px dashed var(--line); padding-top: 0.6rem; margin-top: 0.6rem; }
.fix .label { font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--accent); margin: 0 0 0.3rem; }
.fix p { margin: 0 0 0.4rem; font-size: 0.95rem; }
.copy { font-size: 0.8rem; padding: 0.3rem 0.6rem; border: 1px solid var(--line); background: var(--panel); color: var(--ink); border-radius: 6px; cursor: pointer; }
.copy:hover { border-color: var(--accent); color: var(--accent); }

.findings { margin-top: 1rem; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.1rem; }
.findings h3 { margin-bottom: 0.5rem; }
.findings ul { margin: 0; padding-left: 1.2rem; }
.findings li { margin-bottom: 0.35rem; }
.sev { font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; margin-right: 0.4rem; }
.sev.critical { color: var(--fail); } .sev.warning { color: var(--warn); } .sev.info { color: var(--info); }
.caveats { font-size: 0.9rem; color: var(--muted); }
.raw summary { cursor: pointer; color: var(--muted); font-size: 0.9rem; margin-top: 0.8rem; }
.raw pre { font-size: 0.78rem; max-height: 480px; overflow: auto; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1rem; }
.grid article { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.1rem; }
.grid article p { margin: 0; font-size: 0.95rem; color: var(--muted); }

.endpoint pre { font-size: 0.88rem; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin-top: 1rem; }
@media (max-width: 800px) { .two-col { grid-template-columns: 1fr; } .scorecard { grid-template-columns: 1fr; text-align: center; } .ring { margin: 0 auto; } }
.bullets { padding-left: 1.2rem; }
.bullets li { margin-bottom: 0.5rem; font-size: 0.95rem; }
.tabs { display: flex; gap: 0.3rem; margin-bottom: 0.4rem; }
.tabs button { font-size: 0.85rem; padding: 0.35rem 0.75rem; border: 1px solid var(--line); background: var(--panel); color: var(--muted); border-radius: 6px; cursor: pointer; }
.tabs button[aria-selected="true"] { border-color: var(--accent); color: var(--accent); font-weight: 600; }
.two-col pre { font-size: 0.84rem; }

.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); font-size: 0.95rem; }
th, td { text-align: left; padding: 0.7rem 0.8rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.04em; }
tr.hl td { background: color-mix(in srgb, var(--accent) 8%, var(--panel)); }
td:nth-child(2) { white-space: nowrap; font-weight: 600; }

.faq details { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 0.6rem 1rem; margin-bottom: 0.6rem; }
.faq summary { cursor: pointer; font-weight: 600; padding: 0.3rem 0; }
.faq details p { margin: 0.6rem 0 0.4rem; font-size: 0.97rem; }

footer { border-top: 1px solid var(--line); padding: 1.5rem 1.25rem 2.5rem; text-align: center; color: var(--muted); font-size: 0.88rem; }
.brand-sm { font-weight: 700; color: var(--ink); }

/* grid/flex children default to min-width:auto, which lets a wide <pre> push
   the column past the viewport (horizontal scrollbar). */
.two-col > div, .cards > .card, .grid > article, .scorecard > div { min-width: 0; }
.status, .disclosure, .fineprint { overflow-wrap: anywhere; }