:root { color-scheme: light dark; }
body { margin: 0; font-family: -apple-system, "Hiragino Sans", sans-serif; line-height: 1.8; background: Canvas; color: CanvasText; }
main { max-width: 720px; margin: 0 auto; padding: 32px 16px 64px; }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.2rem; margin-top: 2em; border-bottom: 1px solid color-mix(in srgb, CanvasText 20%, transparent); }
h3 { font-size: 1rem; }
.date { color: color-mix(in srgb, CanvasText 60%, transparent); }