:root { color-scheme: light dark; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  line-height: 1.6;
  max-width: 42rem;
  margin: 0 auto;
  padding: 3rem 1.25rem;
  color: #1a1a1a;
  background: #ffffff;
}

h1 { font-size: 1.5rem; margin-bottom: 0.25rem; }
h2 { font-size: 1.05rem; margin-top: 2rem; }

p.sub { color: #6b7280; margin-top: 0; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9em;
  background: #f3f4f6;
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

footer {
  margin-top: 3rem;
  padding-top: 1rem;
  font-size: 0.85rem;
  color: #6b7280;
  border-top: 1px solid #d1d5db;
}

a { color: #2563eb; }

@media (prefers-color-scheme: dark) {
  body { color: #e8e8e8; background: #16181c; }
  code { background: #26292f; }
  a { color: #7ab3ff; }
  footer { border-top-color: #3a3f47; }
}