:root { --bg: #fafaf9; --fg: #1c1917; --muted: #78716c; --link: #1d4ed8; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #1c1917; --fg: #e7e5e4; --muted: #a8a29e; --link: #93c5fd; }
}
body { margin: 0; background: var(--bg); color: var(--fg);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 48px 16px; }
h1 { font-size: 2rem; margin: 0 0 8px; }
h2 { font-size: 1.15rem; margin: 32px 0 8px; }
a { color: var(--link); }
.lead { font-size: 1.1rem; }
.muted { color: var(--muted); }
code { font-size: .9em; }
footer { margin-top: 48px; color: var(--muted); font-size: .95rem; }