:root { color-scheme: light; font-family: Arial, Helvetica, sans-serif; }
* { box-sizing: border-box; }
.security-page { min-height: 100vh; margin: 0; display: grid; place-items: center; padding: 24px; color: #17324d; background: linear-gradient(145deg, #eaf5ff, #f8fbff 55%, #dcefff); }
.security-card { width: min(100%, 460px); padding: 36px; text-align: center; background: #fff; border: 1px solid #c9e3f8; border-radius: 18px; box-shadow: 0 18px 55px rgba(16, 78, 122, .16); }
.security-shield { width: 62px; height: 62px; margin: 0 auto 16px; display: grid; place-items: center; color: #fff; font-size: 32px; font-weight: bold; background: #087ac1; border-radius: 50% 50% 55% 55%; }
.security-kicker { margin: 0; color: #087ac1; font-weight: bold; }
.security-card h1 { margin: 8px 0 12px; font-size: 30px; }
.security-card form { margin-top: 25px; text-align: left; }
.security-card label { display: block; margin-bottom: 8px; }
.security-card input[type="number"] { width: 100%; padding: 13px; border: 1px solid #9dbbd2; border-radius: 8px; font-size: 18px; }
.security-card button { width: 100%; margin-top: 14px; padding: 13px; border: 0; border-radius: 8px; color: #fff; background: #087ac1; font-size: 16px; font-weight: bold; cursor: pointer; }
.security-card button:hover { background: #05639e; }
.security-error { padding: 10px; color: #8b1e1e; background: #fff0f0; border-radius: 8px; }
.security-note { margin: 22px 0 0; color: #62788b; font-size: 13px; }
.security-trap { position: absolute !important; left: -10000px !important; }
@media (max-width: 520px) { .security-card { padding: 26px 20px; } }