:root { --fg: #1a1a1a; --muted: #555; --bg: #ffffff; --link: #007a38; --line: #e5e5e5; }
* { box-sizing: border-box; }
body { margin: 0; color: var(--fg); background: var(--bg);
  font: 16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, sans-serif; }
.site-header, .site-footer { display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; max-width: 720px; margin: 0 auto; padding: 1rem; }
.site-footer { flex-direction: column; align-items: flex-start; border-top: 1px solid var(--line);
  margin-top: 3rem; color: var(--muted); }
.brand { font-weight: 700; font-size: 1.2rem; text-decoration: none; color: var(--fg); }
.lang-switch a { text-decoration: none; color: var(--link); font-weight: 600; }
main.doc, main.landing { max-width: 720px; margin: 0 auto; padding: 0 1rem; }
.doc h1 { font-size: 1.7rem; } .doc h2 { font-size: 1.25rem; margin-top: 2rem; }
.updated { color: var(--muted); font-size: 0.9rem; }
a { color: var(--link); }
.doc-links { display: flex; gap: 1rem; flex-wrap: wrap; }
.landing ul { list-style: none; padding: 0; }
.landing li { margin: 0.4rem 0; }
@media (max-width: 480px) { .site-header { flex-wrap: wrap; } }