:root { color-scheme: light dark; }
body { margin: 0; font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 24px 20px 48px; }
h1 { font-size: 1.6em; margin: 0.4em 0; }
h2 { font-size: 1.15em; margin-top: 1.6em; }
.meta, .nav { opacity: 0.7; font-size: 0.9em; }