:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --surface-2: #f0f2f5;
  --text: #14181f;
  --muted: #5a6372;
  --border: #dfe3ea;
  --accent: #2f5bd3;
  --accent-text: #ffffff;
  --ok: #17794a;
  --ok-bg: #e3f4ea;
  --warn: #8a5a00;
  --warn-bg: #fff3d6;
  --err: #b42318;
  --err-bg: #fde8e6;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 4px 16px rgba(16, 24, 40, .06);
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1218;
    --surface: #171b23;
    --surface-2: #1f2430;
    --text: #e8ebf1;
    --muted: #a3acbb;
    --border: #2c3341;
    --accent: #8fb0ff;
    --accent-text: #0b1020;
    --ok: #6fd6a0;
    --ok-bg: #11301f;
    --warn: #f3c969;
    --warn-bg: #33270b;
    --err: #ff9a8f;
    --err-bg: #3a1714;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4);
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.6 var(--sans); }
a { color: var(--accent); }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
code, .mono { font-family: var(--mono); font-size: .9em; overflow-wrap: anywhere; }

.wrap { max-width: 980px; margin: 0 auto; padding: 0 16px; }
.top { background: var(--surface); border-bottom: 1px solid var(--border); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 60px; flex-wrap: wrap; }
.brand { font-weight: 700; font-size: 1.15rem; text-decoration: none; color: var(--text); display: flex; align-items: center; gap: 8px; }
.brand-mark { width: 26px; height: 26px; border-radius: 6px; background: var(--accent); display: inline-grid; place-items: center; color: var(--accent-text); font-size: .8rem; }
.nav { display: flex; gap: 16px; flex-wrap: wrap; }
.nav a { color: var(--muted); text-decoration: none; font-weight: 500; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--text); }

.hero { padding: 40px 0 24px; }
.hero h1 { font-size: clamp(1.7rem, 4vw, 2.4rem); line-height: 1.2; margin: 0 0 12px; }
.hero p { color: var(--muted); max-width: 680px; margin: 0; font-size: 1.05rem; }

.banner { margin-top: 18px; padding: 12px 14px; border-radius: var(--radius-sm); background: var(--warn-bg); color: var(--warn); font-size: .95rem; }

section { margin: 28px 0; }
h2 { font-size: 1.3rem; margin: 0 0 12px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.stat-label { color: var(--muted); font-size: .85rem; }
.stat-value { font-size: 1.35rem; font-weight: 700; }

.form { display: flex; gap: 10px; flex-wrap: wrap; }
.input { flex: 1 1 280px; min-width: 0; padding: 12px 14px; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--surface-2); color: var(--text); font: 1rem var(--mono); }
.btn { padding: 12px 18px; border-radius: var(--radius-sm); border: 0; background: var(--accent); color: var(--accent-text); font-weight: 600; font-size: 1rem; cursor: pointer; }
.btn:disabled { opacity: .6; cursor: progress; }
.btn-ghost { background: transparent; color: var(--accent); border: 1px solid var(--border); padding: 6px 10px; font-size: .85rem; font-weight: 500; }
.hint { color: var(--muted); font-size: .9rem; margin: 10px 0 0; display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

.result { margin-top: 16px; }
.pill { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: .85rem; font-weight: 600; }
.pill-ok { background: var(--ok-bg); color: var(--ok); }
.pill-warn { background: var(--warn-bg); color: var(--warn); }
.pill-err { background: var(--err-bg); color: var(--err); }
dl.kv { display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px; margin: 12px 0 0; }
dl.kv dt { color: var(--muted); }
dl.kv dd { margin: 0; min-width: 0; }

.skeleton { height: 1em; border-radius: 6px; background: linear-gradient(90deg, var(--surface-2), var(--border), var(--surface-2)); background-size: 200% 100%; animation: shimmer 1.2s infinite; }
@keyframes shimmer { to { background-position: -200% 0; } }
@media (prefers-reduced-motion: reduce) { .skeleton { animation: none; } }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .95rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 600; }

.docs { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.doc-link { display: block; text-decoration: none; color: inherit; }
.doc-link:hover .card { border-color: var(--accent); }
.doc-link strong { display: block; color: var(--text); }
.doc-link span { color: var(--muted); font-size: .9rem; }

.prose { overflow-wrap: break-word; }
.prose h1 { font-size: 1.8rem; line-height: 1.25; }
.prose table { display: block; overflow-x: auto; }
.prose pre { background: var(--surface-2); padding: 12px; border-radius: var(--radius-sm); overflow-x: auto; }
.prose pre code { overflow-wrap: normal; }
.prose blockquote { margin: 0; padding-left: 14px; border-left: 3px solid var(--border); color: var(--muted); }

footer { color: var(--muted); font-size: .85rem; padding: 32px 0 48px; border-top: 1px solid var(--border); margin-top: 40px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }