:root { color-scheme: light dark; }
body { font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif; max-width: 40rem; margin: 0 auto; padding: 3rem 1.25rem 4rem; }
h1 { font-size: 2rem; letter-spacing: -0.02em; margin-bottom: 0.25rem; }
h2 { font-size: 1.2rem; margin-top: 2rem; }
.lead { font-size: 1.2rem; color: gray; margin-top: 0; }
a { color: #0a84ff; text-decoration: none; }
nav { margin-top: 3rem; font-size: 0.95rem; }
nav a { margin-right: 1.25rem; }