body { margin: 0; background: #f4f6f8; color: #263238; font: 16px/1.65 Arial, sans-serif; }
main { max-width: 800px; margin: 40px auto; padding: 32px; background: white; border-radius: 8px; }
h1 { line-height: 1.2; } h2 { margin-top: 28px; font-size: 1.25rem; }
a { color: #086a8c; } nav { display: flex; flex-wrap: wrap; gap: 20px; }
@media (max-width: 600px) { main { margin: 12px; padding: 20px; } }