:root { color-scheme: light; font-family: Arial, sans-serif; color: #112b50; background: #f3f6fa; }
* { box-sizing: border-box; }
body { margin: 0; padding: 32px 20px; }
main { max-width: 780px; margin: 0 auto; padding: 32px; background: #fff; border: 1px solid #d8e1ee; border-radius: 8px; }
h1 { margin: 20px 0 14px; font-size: 28px; line-height: 1.25; }
p { line-height: 1.6; }
a { color: #12487d; text-underline-offset: 3px; }
a:hover { color: #056fb5; }
a:focus-visible { outline: 2px solid #167caf; outline-offset: 4px; }
ul { padding-left: 22px; line-height: 1.6; }
li { margin: 12px 0; }
small, .muted { color: #5d6d82; }
footer { margin-top: 28px; font-size: 13px; }
@media (max-width: 520px) { body { padding: 12px; } main { padding: 22px 18px; } h1 { font-size: 24px; } }