:root {
  --ink: #0f172a; --ink-2: #334155; --muted: #64748b; --line: #e2e8f0;
  --bg: #ffffff; --bg-2: #f8fafc; --accent: #4f46e5; --accent-2: #7c3aed;
  --code-bg: #0f172a; --code-ink: #e2e8f0; --ok: #15803d; --warn: #b45309; --bad: #b91c1c;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65; -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.88em; background: #eef2ff; color: #3730a3; padding: 1px 6px; border-radius: 5px; }
pre { background: var(--code-bg); color: var(--code-ink); padding: 16px 18px; border-radius: 12px; overflow-x: auto; font-size: 13px; line-height: 1.55; }
pre code { background: none; color: inherit; padding: 0; }

/* top bar */
.docs-top {
  position: sticky; top: 0; z-index: 30; background: rgba(255,255,255,0.9); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line); height: 58px; display: flex; align-items: center;
}
.docs-top .inner { max-width: 1180px; margin: 0 auto; padding: 0 24px; width: 100%; display: flex; align-items: center; justify-content: space-between; }
.docs-brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 17px; color: var(--ink); }
.docs-brand .mark { width: 26px; height: 26px; border-radius: 7px; background: linear-gradient(120deg, var(--accent), var(--accent-2)); display: grid; place-items: center; color: #fff; font-size: 14px; }
.docs-top .badge { font-size: 11px; font-weight: 700; color: var(--accent); background: #eef2ff; border: 1px solid #c7d2fe; padding: 4px 10px; border-radius: 999px; }
.docs-top a.home { font-size: 13px; color: var(--muted); }

/* layout */
.layout { max-width: 1180px; margin: 0 auto; padding: 0 24px; display: grid; grid-template-columns: 248px 1fr; gap: 44px; }
nav.toc { position: sticky; top: 74px; align-self: start; max-height: calc(100vh - 90px); overflow-y: auto; padding: 24px 0; font-size: 13.5px; }
nav.toc .grp { font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); font-weight: 700; margin: 20px 0 8px; }
nav.toc a { display: block; color: var(--ink-2); padding: 4px 10px; border-radius: 7px; border-left: 2px solid transparent; }
nav.toc a:hover { background: var(--bg-2); text-decoration: none; }
nav.toc a.active { color: var(--accent); border-left-color: var(--accent); background: #eef2ff; font-weight: 600; }

main.doc { padding: 32px 0 120px; min-width: 0; }
main.doc h1 { font-size: 34px; letter-spacing: -0.02em; margin: 8px 0 6px; }
main.doc h2 { font-size: 24px; letter-spacing: -0.01em; margin: 46px 0 14px; padding-top: 14px; border-top: 1px solid var(--line); scroll-margin-top: 74px; }
main.doc h3 { font-size: 17px; margin: 28px 0 10px; scroll-margin-top: 74px; }
main.doc p, main.doc li { color: var(--ink-2); }
main.doc .lead { font-size: 18px; color: var(--muted); margin-top: 0; }
main.doc table { border-collapse: collapse; width: 100%; margin: 16px 0; font-size: 14px; display: block; overflow-x: auto; }
main.doc th, main.doc td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
main.doc th { color: var(--ink); font-weight: 700; background: var(--bg-2); }
main.doc blockquote { margin: 16px 0; padding: 12px 16px; background: #eef2ff; border-left: 3px solid var(--accent); border-radius: 0 8px 8px 0; color: var(--ink-2); }
main.doc .callout { margin: 16px 0; padding: 14px 16px; border-radius: 10px; border: 1px solid var(--line); background: var(--bg-2); font-size: 14.5px; }
main.doc .callout.warn { background: #fffbeb; border-color: #fde68a; }
.tag { font-size: 11px; font-weight: 700; padding: 2px 8px; border-radius: 6px; }
.tag.pass { color: var(--ok); background: #dcfce7; } .tag.waived { color: var(--warn); background: #fef3c7; } .tag.blocked { color: var(--bad); background: #fee2e2; }
hr { border: 0; border-top: 1px solid var(--line); margin: 40px 0; }

/* public overview / gate */
.hero-lite { max-width: 820px; margin: 0 auto; padding: 64px 24px 24px; text-align: center; }
.hero-lite h1 { font-size: 40px; letter-spacing: -0.02em; }
.hero-lite p { font-size: 18px; color: var(--muted); }
.pillars { max-width: 980px; margin: 24px auto; padding: 0 24px; display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
.pillar { border: 1px solid var(--line); border-radius: 14px; padding: 20px; background: var(--bg-2); }
.pillar h3 { margin: 0 0 6px; font-size: 16px; }
.pillar p { margin: 0; font-size: 14px; color: var(--muted); }
.gate { max-width: 560px; margin: 40px auto 90px; padding: 30px; border: 1px solid var(--line); border-radius: 16px; text-align: center; background: linear-gradient(160deg, #f8fafc, #eef2ff); }
.gate .lock { font-size: 30px; }
.gate h2 { border: 0; margin: 8px 0 6px; padding: 0; font-size: 22px; }
.gate p { color: var(--muted); margin-top: 0; }
.gate form { display: flex; gap: 10px; margin-top: 18px; }
.gate input { flex: 1; padding: 12px 14px; border: 1px solid #cbd5e1; border-radius: 10px; font-size: 14px; }
.gate button { padding: 12px 22px; border: 0; border-radius: 10px; background: linear-gradient(120deg, var(--accent), var(--accent-2)); color: #fff; font-weight: 700; font-size: 14px; cursor: pointer; }
.gate .err { color: var(--bad); font-size: 13px; margin-top: 12px; }
.gate .note { font-size: 12px; color: var(--muted); margin-top: 14px; }

@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  nav.toc { position: static; max-height: none; border-bottom: 1px solid var(--line); }
  .pillars { grid-template-columns: 1fr; }
}
@media print {
  .docs-top, nav.toc { display: none; }
  .layout { grid-template-columns: 1fr; max-width: none; }
  a { color: var(--ink); } main.doc h2 { break-after: avoid; }
}