:root {
    font-family: Inter, system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
    color: #172336;
    background: #f5f7fb;
}
* { box-sizing: border-box; }
body { margin: 0; }
.login-shell { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.login-panel {
    width: 100%; max-width: 420px; background: #fff; border: 1px solid #e5eaf1;
    box-shadow: 0 7px 32px #253c5a08; border-radius: 18px; padding: 35px;
}
.eyebrow { font-size: 11px; font-weight: 800; letter-spacing: .15em; color: #4374be; }
h1 { font-size: 27px; letter-spacing: -.03em; margin: 12px 0 8px; }
.subtitle, .footnote { color: #667489; font-size: 13px; line-height: 1.5; }
.subtitle { margin: 0 0 26px; }
label { display: block; font-size: 13px; font-weight: 650; margin: 18px 0 8px; }
input { width: 100%; padding: 13px 14px; font: inherit; font-size: 14px; border: 1px solid #ccd5e1; border-radius: 9px; }
input:focus { outline: none; border-color: #3779d6; box-shadow: 0 0 0 3px #3779d619; }
button { width: 100%; margin-top: 26px; padding: 13px; background: #2563c8; border: none; border-radius: 9px; color: #fff; font-size: 14px; font-weight: 650; cursor: pointer; }
button:hover { background: #1e54ad; }
.notice { font-size: 13px; padding: 12px; border-radius: 8px; }
.notice.error { background: #fff1f0; color: #a82424; }
.notice.success { background: #ecf9f0; color: #1d713c; }
.footnote { margin: 24px 0 0; text-align: center; font-size: 12px; }
@media (max-width: 520px) { .login-panel { padding: 23px; } }