:root {
  --bg: #ffffff;
  --fg: #0f172a;
  --muted: #475569;
  --line: #e2e8f0;
  --accent: #1d4ed8;
  --surface: #f8fafc;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  padding: 0 1rem 3rem;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  overflow-wrap: break-word;
}
.site-header, main, .related, .site-footer {
  max-width: 46rem;
  margin: 0 auto;
}
.site-header { padding: 2rem 0 1rem; border-bottom: 1px solid var(--line); }
.eyebrow { margin: 0 0 .5rem; color: var(--muted); font-size: .8rem; letter-spacing: .08em; text-transform: uppercase; }
.breadcrumb { display: flex; flex-wrap: wrap; gap: .4rem; color: var(--muted); font-size: .85rem; }
h1 { font-size: clamp(1.6rem, 4vw, 2.2rem); line-height: 1.2; margin: 1.5rem 0 .75rem; }
h2 { font-size: 1.2rem; margin: 2rem 0 .5rem; }
h3 { font-size: 1.05rem; margin: 1.5rem 0 .4rem; }
p, li { color: var(--fg); }
.lede { font-size: 1.05rem; color: var(--muted); }
section { margin: 1.5rem 0; }
ul, ol { padding-left: 1.25rem; }
a { color: var(--accent); }
a:focus-visible, summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
table { width: 100%; border-collapse: collapse; font-size: .95rem; }
th, td { border: 1px solid var(--line); padding: .5rem .6rem; text-align: left; vertical-align: top; }
th { background: var(--surface); }
details { border: 1px solid var(--line); border-radius: .5rem; padding: .6rem .8rem; margin: .5rem 0; background: var(--surface); }
summary { cursor: pointer; font-weight: 600; }
.checklist { list-style: none; padding-left: 0; }
.checklist li { border-bottom: 1px dashed var(--line); padding: .5rem 0 .5rem 1.6rem; position: relative; }
.checklist li::before { content: "☐"; position: absolute; left: 0; color: var(--accent); }
dl dt { font-weight: 600; margin-top: .75rem; }
dl dd { margin: .15rem 0 0; color: var(--muted); }
.sources { background: var(--surface); border: 1px solid var(--line); border-radius: .5rem; padding: 1rem; }
.meta { font-size: .85rem; color: var(--muted); }
.destination { border-left: 4px solid var(--accent); padding: .25rem 0 .25rem 1rem; }
.related { border-top: 1px solid var(--line); margin-top: 2.5rem; padding-top: 1rem; }
.site-footer { color: var(--muted); font-size: .85rem; border-top: 1px solid var(--line); margin-top: 2rem; padding-top: 1rem; }
img { max-width: 100%; height: auto; }
code { background: var(--surface); padding: .1rem .3rem; border-radius: .25rem; }
@media (max-width: 40rem) {
  body { padding: 0 .85rem 2rem; }
  table { display: block; overflow-x: auto; }
}