:root { color-scheme: dark; }
* { box-sizing: border-box; }
body {
  margin: 0;
  background: #020d1e;
  color: #f2f6fc;
  font: 16px/1.65 Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 32px 20px 64px; }
.back { display: inline-block; margin-bottom: 24px; color: #7fc0ff; text-decoration: none; font-weight: 600; }
h1 { font-size: 2rem; letter-spacing: -0.03em; margin: 0 0 4px; }
h2 { font-size: 1.15rem; margin: 32px 0 8px; }
.updated { color: #7a8ba6; margin: 0 0 24px; }
p, li { color: #b6c3d8; }
a { color: #7fc0ff; }
ul { padding-left: 1.2rem; }