body { margin: 0; background: #f4f6f8; color: #18334f; font: 16px/1.6 system-ui, sans-serif; }
main { max-width: 560px; margin: 12vh auto; padding: 24px; }
h1 { font-size: 22px; font-weight: 600; }
button, a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 16px; border: 0; border-radius: 6px; background: #fff; color: #174f95; font: inherit; cursor: pointer; }
[hidden] { display: none; }
:focus-visible { outline: 2px solid #174f95; outline-offset: 3px; }