:root { color-scheme: light; font-family: system-ui, sans-serif; line-height: 1.6; }
body { max-width: 48rem; margin: 0 auto; padding: 2rem 1rem; color: #1f2937; }
h1, h2 { line-height: 1.2; color: #111827; }
nav { margin: 1rem 0 2rem; }
nav a { margin-right: 1rem; }
small { color: #4b5563; }
footer { margin-top: 3rem; border-top: 1px solid #d1d5db; padding-top: 1rem; }