:root { font-family: system-ui, sans-serif; color: #17202a; background: #f7f9fb; }
* { box-sizing: border-box; }
body { margin: 0; }
.skip { position: absolute; left: -9999px; top: 8px; padding: 10px; background: white; }
.skip:focus { left: 8px; z-index: 2; }
.header { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding: 18px max(20px, calc((100% - 920px) / 2)); background: #0b5cab; }
.header a { color: white; }
.brand { font-size: 22px; font-weight: 750; text-decoration: none; }
.card { max-width: 920px; margin: 34px auto; padding: 30px; background: white; border: 1px solid #d7dee5; border-radius: 10px; box-shadow: 0 2px 8px #17202a12; }
h1 { margin-top: 0; font-size: 30px; }
h2 { margin-top: 30px; font-size: 20px; }
p, li { line-height: 1.6; }
li { margin: 10px 0; }
.notice { padding: 14px; background: #e9f2fb; border-inline-start: 4px solid #0b5cab; }
.button { display: inline-block; margin-top: 12px; padding: 12px 18px; border-radius: 6px; background: #0b5cab; color: white; font-weight: 700; text-decoration: none; }
.button:focus-visible, a:focus-visible { outline: 3px solid #ffbf47; outline-offset: 3px; }
code, kbd { padding: 2px 5px; background: #eef1f4; border-radius: 4px; }
.muted { color: #5c6873; }
@media (max-width: 600px) { .card { margin: 16px; padding: 20px; } h1 { font-size: 25px; } }