:root {
  color-scheme: light;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.55;
  color: #0f172a;
  background: #f8fafc;
}
body {
  margin: 0;
  padding: 1.5rem;
}
main {
  max-width: 42rem;
  margin: 0 auto;
  padding: 2rem;
  background: #fff;
  border-radius: 12px;
  border: 1px solid #e2e8f0;
}
h1 { font-size: 1.75rem; margin-top: 0; }
h2 { font-size: 1.125rem; margin-top: 1.75rem; }
.meta { color: #64748b; font-size: 0.9rem; }
a { color: #1e3a5f; }
footer { margin-top: 2rem; font-size: 0.875rem; color: #64748b; }