:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #1f2933;
  background: #f7f8fb;
  --blue: #0a7cff;
  --border: #e5e7eb;
  --muted: #667085;
}
* { box-sizing: border-box; }
body { margin: 0; }
.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 32px 20px 80px;
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 32px;
  align-items: start;
}
.toc {
  position: sticky;
  top: 24px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 18px 22px;
  box-shadow: 0 18px 48px rgba(15, 23, 42, 0.06);
}
.toc h2 { margin: 0 0 10px; color: var(--muted); font-size: 13px; letter-spacing: 0.04em; text-transform: uppercase; }
.toc a { display: block; padding: 6px 8px; border-radius: 6px; color: #1f2933; font-size: 14px; line-height: 1.4; text-decoration: none; }
.toc a:hover { background: #f0f5ff; color: var(--blue); }
.toc a:focus-visible { outline: 3px solid #7d1d23; outline-offset: 2px; }
.toc a.active { background: #eef4ff; color: var(--blue); font-weight: 600; }
main { min-width: 0; padding: 40px 44px; border: 1px solid var(--border); border-radius: 12px; background: #fff; box-shadow: 0 18px 48px rgba(15, 23, 42, 0.08); }
h1 { margin: 0 0 6px; color: #111827; font-size: 32px; line-height: 1.15; }
h2 { margin: 28px 0 10px; color: #111827; font-size: 21px; }
h3 { margin: 20px 0 8px; color: #111827; font-size: 16px; }
.lede { margin: 0 0 8px; color: var(--muted); font-size: 16px; }
.updated { margin: 0 0 8px; color: var(--muted); font-size: 13px; }
section { padding-top: 8px; scroll-margin-top: 24px; }
p, li { font-size: 15.5px; line-height: 1.65; }
p { margin: 0 0 14px; }
ul, ol { margin: 0 0 14px; padding-left: 22px; }
li { margin: 0 0 6px; }
a { color: var(--blue); }
.note { margin: 0 0 14px; padding: 12px 14px; border: 1px solid #d6e4ff; border-radius: 8px; background: #f0f5ff; font-size: 14.5px; }
.modules { padding: 0; list-style: none; }
.modules li { margin: 0 0 8px; }
.crumb { margin: 0 0 20px; font-size: 14px; }
.crumb a { text-decoration: none; }
.env-badge { display: inline-block; margin-left: 10px; padding: 3px 9px; border-radius: 999px; background: #d97706; color: #fff; font-size: 12px; font-weight: 600; letter-spacing: 0.04em; vertical-align: middle; }
.env-badge[hidden] { display: none; }
@media (max-width: 860px) {
  .wrap { grid-template-columns: 1fr; padding: 20px 14px 60px; }
  .toc { position: static; }
  main { padding: 28px 22px; }
  h1 { font-size: 27px; }
}
@media print {
  :root { color: #000; background: #fff; }
  body { background: #fff; }
  .wrap { display: block; max-width: none; padding: 0; }
  .toc, .env-badge { display: none !important; }
  main { border: 0; box-shadow: none; padding: 0; }
  h1, h2, h3, .note, li { break-inside: avoid; }
  a[href]::after { content: " (" attr(href) ")"; font-size: 0.8em; }
}