:root { color-scheme: light; font-family: system-ui, sans-serif; color: #18212b; background: #f4f6f8; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; }
.shell { width: min(92vw, 420px); background: white; border: 1px solid #d8dee5; border-radius: 8px; padding: 28px; box-shadow: 0 8px 30px #18212b14; }
h1 { margin-top: 0; } nav { display: grid; gap: 10px; margin-top: 24px; } a, button { color: #075985; font: inherit; } a { display: block; padding: 10px 12px; border: 1px solid #cbd5e1; border-radius: 6px; text-decoration: none; } label { display: grid; gap: 6px; margin: 14px 0; } input { padding: 10px; border: 1px solid #b8c2cc; border-radius: 5px; font: inherit; } button { border: 0; border-radius: 6px; padding: 11px 14px; background: #075985; color: white; cursor: pointer; } .message { min-height: 24px; margin-top: 14px; }