:root {
  --bg: #ffffff;
  --text: #1f2933;
  --muted: #5f6b7a;
  --accent: #1d4ed8;
  --accent-soft: #e8eefc;
  --border: #e3e7ee;
  --header: #0f2a5f;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 16px; }

.site-header { background: var(--header); color: #fff; position: sticky; top: 0; z-index: 10; }
.header-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 0 16px; min-height: 56px; }
.brand { padding: 12px 0; color: #fff; font-weight: 700; font-size: 1.1rem; text-decoration: none; }
.menu-toggle { display: none; background: none; border: 1px solid rgba(255,255,255,.5); color: #fff; border-radius: 6px; padding: 6px 12px; font: inherit; }
.menu ul { list-style: none; margin: 0; padding: 0; }
.menu > ul { display: flex; flex-wrap: wrap; gap: 0 2px; }
.menu li { position: relative; }
.menu a { display: block; color: #fff; text-decoration: none; padding: 10px 8px; font-size: .9rem; white-space: nowrap; }
.menu .has-sub > ul a { white-space: normal; }
.menu a:hover { background: rgba(255,255,255,.1); }
.menu .has-sub > ul { display: none; position: absolute; left: 0; top: 100%; background: #fff; min-width: 240px; box-shadow: 0 8px 24px rgba(0,0,0,.15); border-radius: 0 0 8px 8px; }
.menu .has-sub:hover > ul, .menu .has-sub:focus-within > ul { display: block; }
.menu .has-sub > ul a { color: var(--text); padding: 10px 14px; }
.menu .has-sub > ul a:hover { background: var(--accent-soft); }

main.wrap { padding-top: 24px; padding-bottom: 48px; }
.crumbs { font-size: .85rem; color: var(--muted); margin-bottom: 8px; }
.crumbs a { color: var(--muted); }
h1 { font-size: clamp(1.6rem, 4vw, 2.2rem); line-height: 1.2; margin: 0 0 16px; }
.prose h2 { margin-top: 2em; font-size: 1.45rem; }
.prose h3 { margin-top: 1.6em; font-size: 1.2rem; }
.prose img { max-width: 100%; height: auto; }
.prose table { width: 100%; border-collapse: collapse; margin: 1.2em 0; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; vertical-align: top; }
.prose th { background: var(--accent-soft); }
.prose a[href$=".pdf"]::before { content: "PDF"; font-size: .7em; font-weight: 700; color: #fff; background: #c2410c; border-radius: 3px; padding: 1px 4px; margin-right: 6px; vertical-align: 2px; }

.site-footer { border-top: 1px solid var(--border); color: var(--muted); font-size: .9rem; padding: 20px 0; }
.site-footer a { color: var(--muted); }

@media (max-width: 760px) {
  .menu-toggle { display: block; }
  .menu { display: none; width: 100%; padding-bottom: 12px; }
  .menu.open { display: block; }
  .menu > ul { flex-direction: column; }
  .menu a { padding: 10px 4px; }
  .menu .has-sub > ul { display: block; position: static; box-shadow: none; background: transparent; padding-left: 12px; }
  .menu .has-sub > ul a { color: #dbe4f5; }
}

.toc { background: var(--accent-soft); border-radius: 8px; padding: 12px 16px; margin: 0 0 24px; font-size: .95rem; }
.toc summary { font-weight: 700; cursor: pointer; }
.toc ul { margin: 8px 0 0; padding-left: 20px; }
.prose iframe { max-width: 100%; border: 0; }

.prose ul.downloads { list-style: none; padding: 0; }
.prose ul.downloads li { padding: 6px 0; border-bottom: 1px solid var(--border); }
.prose table.coverage td { text-align: center; }
.prose table.coverage td a { text-decoration: none; font-weight: 700; }
.prose .source { font-size: .85rem; color: var(--muted); }
.menu .has-sub > ul { max-height: 70vh; overflow-y: auto; }