:root { color-scheme: light; font-family: system-ui, sans-serif; line-height: 1.65; }
body { margin: 0; color: #182536; background: #f7f9fc; }
main { max-width: 760px; margin: 2rem auto; padding: 2rem; background: white; border: 1px solid #dce4ee; border-radius: 12px; }
h1, h2 { line-height: 1.25; }
h1 { margin-top: 0; }
h2 { margin-top: 1.8rem; }
a { color: #145ca8; }
nav { display: flex; gap: 1.2rem; margin-top: 2rem; padding-top: 1rem; border-top: 1px solid #dce4ee; }
@media (max-width: 800px) { main { margin: 0; padding: 1.5rem; border: 0; border-radius: 0; } }