:root {
  --bg: #f7f5f2;
  --text: #1d1d1f;
  --muted: #6b6b70;
  --link: #2f5fd0;
  color-scheme: light dark;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #17171a; --text: #f2f2f4; --muted: #a0a0a8; --link: #8fb0ff; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); line-height: 1.6; }
main { max-width: 640px; margin: 0 auto; padding: 48px 16px 24px; }
h1 { font-size: 2.2rem; margin: 0.2em 0; line-height: 1.15; }
h2 { font-size: 1.15rem; margin-top: 2em; }
.lead { font-size: 1.2rem; color: var(--muted); margin-top: 0; }
.muted { color: var(--muted); }
.dots { display: flex; gap: 6px; }
.dots span { width: 14px; height: 14px; border-radius: 50%; display: inline-block; }
a { color: var(--link); }
ul { padding-left: 1.2em; }
li { margin: 0.4em 0; }
footer { max-width: 640px; margin: 0 auto; padding: 16px 16px 48px; color: var(--muted); font-size: 0.9rem; }