:root { font-family: Arial, sans-serif; color: #334155; background: #f8fafc; line-height: 1.65; }
* { box-sizing: border-box; }
body { margin: 0; }
main { max-width: 760px; margin: auto; padding: 20px; }
header, section, footer { margin-bottom: 24px; }
h1, h2, h3 { color: #0f172a; line-height: 1.3; }
h1 { font-size: 28px; } h2 { font-size: 21px; } h3 { font-size: 16px; margin-bottom: 4px; }
p { margin: 8px 0 14px; }
a { color: #075985; text-underline-offset: 3px; overflow-wrap: anywhere; }
nav { display: flex; flex-wrap: wrap; gap: 8px 16px; }
nav a { padding: 6px 0; }
section { border-top: 1px solid #cbd5e1; padding-top: 12px; scroll-margin-top: 12px; }
li { margin-bottom: 8px; }
footer { font-size: 13px; border-top: 1px solid #cbd5e1; padding-top: 16px; }
@media (max-width: 430px) { main { padding: 16px; } h1 { font-size: 24px; } }