:root { font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif; }
body { margin: 0; line-height: 1.4; }
header, footer { padding: 12px 0; background: #f6f6f6; }
.container { max-width: 900px; margin: 0 auto; padding: 0 16px; }
h1 { margin: 0; font-size: 18px; }
h1 a { text-decoration: none; color: inherit; }
nav a { text-decoration: none; }
main { padding: 18px 0; }