:root { color-scheme: light dark; }
body { margin: 0; font-family: system-ui, -apple-system, "Segoe UI", sans-serif; line-height: 1.6; background: #f8fafc; color: #0f172a; }
main { max-width: 46rem; margin: 0 auto; padding: 2rem 1.25rem 4rem; }
nav { font-size: .9rem; margin-bottom: 2rem; }
h1 { font-size: 1.75rem; margin: 0 0 .25rem; }
h2 { font-size: 1.15rem; margin: 2rem 0 .5rem; }
.meta { color: #64748b; font-size: .9rem; margin-top: 0; }
a { color: #1d4ed8; }
li { margin-bottom: .35rem; }
@media (prefers-color-scheme: dark) {
  body { background: #0b1120; color: #e2e8f0; }
  .meta { color: #94a3b8; }
  a { color: #93c5fd; }
}