:root { color-scheme: light dark; --fg: #0b1220; --bg: #ffffff; --muted: #5b6478; }
@media (prefers-color-scheme: dark) { :root { --fg: #e8ecf4; --bg: #0b1220; --muted: #93a0b8; } }
* { box-sizing: border-box; }
body { margin: 0; padding: 3rem 1.5rem; background: var(--bg); color: var(--fg);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif; }
main { max-width: 42rem; margin: 0 auto; }
h1 { font-size: 2rem; margin: 0 0 .5rem; }
h2 { font-size: 1rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 2rem 0 .5rem; }
.lede { color: var(--muted); margin: 0; }
.muted { color: var(--muted); }
ul { padding-left: 1.2rem; margin: 0; }