:root { color-scheme: light dark; }
body { max-width: 680px; margin: 0 auto; padding: 48px 20px; font: 16px/1.8 -apple-system, "Hiragino Sans", sans-serif; }
h1 { font-size: 26px; margin-bottom: 4px; }
h2 { font-size: 18px; margin-top: 32px; }
.lead { color: #888; margin-top: 0; }
footer { margin-top: 48px; font-size: 13px; color: #888; }
a { color: #0a84ff; }