:root { color-scheme: light; font-family: system-ui, sans-serif; color: #17233c; background: #f3f5fa; }
body { margin: 0; }
main { max-width: 720px; margin: 6vh auto; padding: 32px; background: white; border-radius: 12px; box-shadow: 0 5px 30px #17233c12; }
.brand { color: #3858e9; font-weight: 700; letter-spacing: .08em; }
label { display: block; margin: 18px 0; }
input:not([type=checkbox]), select { display: block; box-sizing: border-box; width: 100%; padding: 12px; margin-top: 6px; border: 1px solid #8791a5; border-radius: 5px; font: inherit; }
button { padding: 12px 18px; border: 0; border-radius: 5px; background: #3858e9; color: white; cursor: pointer; font: inherit; }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid #17233c; outline-offset: 3px; }
nav { display: flex; flex-wrap: wrap; gap: 20px; }
a { color: #2947c9; }
section { margin-top: 28px; padding-top: 16px; border-top: 1px solid #ddd; }
[role=alert] { padding: 12px; border-left: 4px solid #b32020; color: #8d1717; background: #fff3f3; }
@media (max-width: 780px) { main { margin: 16px; padding: 22px; } }