:root { font-family: "Segoe UI", Arial, sans-serif; color: #26333c; background: #f4f5f6; color-scheme: light; }
* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; }
.login-shell { min-height: 100dvh; display: grid; place-items: center; padding: 24px; }
.login-panel { width: min(100%, 440px); padding: 36px; background: #fff; border: 1px solid #d9dfe3; border-radius: 5px; }
.product-label { color: #b91c2b; font-size: 10px; font-weight: 700; letter-spacing: .06em; line-height: 1.6; margin: 0 0 24px; }
h1 { margin: 0 0 12px; font-size: 27px; letter-spacing: -.025em; }
.login-intro { color: #596674; font-size: 14px; line-height: 1.6; margin-bottom: 28px; }
form { display: grid; gap: 10px; }
label { font-size: 12px; font-weight: 650; }
input { min-height: 46px; width: 100%; border: 1px solid #a5afb8; border-radius: 4px; padding: 10px 12px; margin-bottom: 12px; font: inherit; background: #fff; }
button { min-height: 46px; border: 1px solid #b91c2b; border-radius: 4px; background: #b91c2b; color: #fff; font: inherit; font-size: 14px; font-weight: 600; cursor: pointer; }
button:hover { background: #991b29; }
:focus-visible { outline: 2px solid #b91c2b; outline-offset: 3px; }
.form-error { font-size: 13px; line-height: 1.5; padding: 12px; background: #fff1f2; color: #a31925; border: 1px solid #edc2c7; }
@media (max-width: 480px) { .login-shell { padding: 16px; } .login-panel { padding: 24px; } h1 { font-size: 24px; } }