:root { color-scheme: light dark; }
body { margin: 0; color: #263244; background: #fff; font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
main { padding: 20px 24px; }
p { margin: 0; }
@media (prefers-color-scheme: dark) { body { color: #e1e6ee; background: #111827; } }