:root { color-scheme: dark; }
* { box-sizing: border-box; }
body {
  margin: 0;
  background: #111114;
  color: #e4e4e7;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.6;
}
main { max-width: 42rem; margin: 0 auto; padding: 4rem 1.5rem; }
h1 { font-size: 1.6rem; margin: 0 0 1rem; }
h2 { font-size: 1.1rem; margin: 2rem 0 0.5rem; }
p, li { color: #d4d4d8; }
.note { color: #a1a1aa; font-size: 0.95rem; }
a { color: #93c5fd; }
footer { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid #27272a; color: #a1a1aa; }