:root {
  --text: #5c6370;
  --text-h: #0f172a;
  --text-muted: #94a3b8;
  --bg: #f8fafc;
  --surface: #fff;
  --border: #e2e8f0;
  --code-bg: #f1f5f9;
  --accent: #4f46e5;
  --pass: #059669;
  --pass-bg: #05966914;
  --pass-border: #05966940;
  --warn: #d97706;
  --warn-bg: #d9770614;
  --warn-border: #d9770640;
  --fail: #dc2626;
  --fail-bg: #dc262614;
  --fail-border: #dc262640;
  --shadow: 0 1px 3px #0f172a0f, 0 4px 12px #0f172a0a;
  --sans: "Segoe UI", system-ui, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font: 16px/1.5 var(--sans);
  color: var(--text);
  background: var(--bg);
}
@media (prefers-color-scheme: dark) {
  :root {
    --text: #94a3b8;
    --text-h: #f1f5f9;
    --text-muted: #64748b;
    --bg: #0b1120;
    --surface: #131c2e;
    --border: #1e293b;
    --code-bg: #0f172a;
    --accent: #818cf8;
    --pass: #34d399;
    --pass-bg: #34d3991a;
    --pass-border: #34d3994d;
    --warn: #fbbf24;
    --warn-bg: #fbbf241a;
    --warn-border: #fbbf244d;
    --fail: #f87171;
    --fail-bg: #f871711a;
    --fail-border: #f871714d;
  }
}
* { box-sizing: border-box; }
body { margin: 0; }
h1, h2, h3 { color: var(--text-h); font-weight: 650; letter-spacing: -0.02em; }
h1 { font-size: clamp(2rem, 5vw, 2.8rem); margin: 0 0 0.4rem; }
p { margin: 0; }
button, input { font: inherit; color: inherit; }
.app { width: min(1040px, calc(100% - 2rem)); margin: 0 auto; padding: 2.5rem 0 4rem; }
.hero { text-align: center; margin-bottom: 1.6rem; }
.hero__badge { letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); font-size: 0.75rem; font-weight: 700; }
.hero p:last-child { max-width: 42rem; margin: 0.4rem auto 0; }
.search { display: flex; gap: 0.6rem; }
.search input, .search button { min-height: 48px; border-radius: 12px; }
.search input { flex: 1; border: 1px solid var(--border); background: var(--surface); padding: 0 0.9rem; }
.search button { border: 0; background: var(--accent); color: white; font-weight: 700; padding: 0 1.1rem; cursor: pointer; }
.error { margin-top: 0.8rem; color: var(--fail); }
.grades { display: grid; grid-template-columns: 1fr 1fr; gap: 0.8rem; margin: 1.2rem 0; }
.grade { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 1rem 1.1rem; box-shadow: var(--shadow); }
.grade strong { display: block; font-size: 2rem; color: var(--text-h); }
.section-title { margin: 1.6rem 0 0.7rem; font-size: 1.15rem; }
.grid { display: grid; gap: 0.8rem; }
.card { background: var(--surface); border: 1px solid var(--border); border-left: 4px solid var(--border); border-radius: 16px; padding: 1rem 1.1rem; box-shadow: var(--shadow); }
.card--pass { border-left-color: var(--pass); }
.card--warn { border-left-color: var(--warn); }
.card--fail { border-left-color: var(--fail); }
.card__header { display: flex; justify-content: space-between; gap: 0.8rem; align-items: flex-start; }
.card__title { margin: 0; font-size: 1.05rem; }
.card__subtitle, .card__summary { color: var(--text); margin-top: 0.35rem; }
.badge { display: inline-flex; align-items: center; gap: 0.3rem; border-radius: 999px; padding: 0.15rem 0.6rem; font-size: 0.78rem; font-weight: 700; white-space: nowrap; }
.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); }
.record { margin-top: 0.7rem; background: var(--code-bg); border-radius: 10px; padding: 0.65rem 0.75rem; overflow-x: auto; }
.record span { display: block; color: var(--text-muted); font-size: 0.72rem; letter-spacing: 0.06em; text-transform: uppercase; }
.record code { font-family: var(--mono); font-size: 0.82rem; white-space: pre-wrap; word-break: break-word; }
.details { display: grid; grid-template-columns: 1fr 1fr; gap: 0.35rem 1rem; margin: 0.8rem 0 0; }
.details div { display: flex; justify-content: space-between; gap: 0.6rem; border-bottom: 1px solid var(--border); padding-bottom: 0.25rem; }
.details dt { color: var(--text-muted); }
.details dd { margin: 0; text-align: right; }
.recommendations { margin: 0.7rem 0 0; padding-left: 1.1rem; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
@media (max-width: 720px) {
  .search, .grades, .details { grid-template-columns: 1fr; display: grid; }
  .search button, .search input { width: 100%; }
}