:root { --bg: #f7f7f5; --ink: #1d1d1b; --muted: #6b6b66; --accent: #2f5bd3; color-scheme: light; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #151514; --ink: #ecebe6; --muted: #a09f98; --accent: #7c9cff; color-scheme: dark; }
}
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif; }
main { max-width: 640px; margin: 0 auto; padding: 40px 16px; }
a { color: var(--accent); }
h1 { font-size: 1.8rem; margin: 0 0 12px; }
h2 { font-size: 1.1rem; margin: 28px 0 6px; }
code { font: 0.9em ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.muted { color: var(--muted); }