:root { font-family: "Segoe UI", "Microsoft YaHei", sans-serif; color: #17233b; background: #f2f5fa; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; padding: 20px; }
.login-card { width: min(420px, 100%); padding: 34px; background: #fff; border: 1px solid #e2e9f1; border-radius: 18px; box-shadow: 0 14px 45px rgba(22, 39, 68, .09); }
.eyebrow { margin: 0 0 12px; color: #087f88; font-size: 11px; font-weight: 800; letter-spacing: .2em; }
h1 { margin: 0; font-size: 29px; }
.subtitle { margin: 10px 0 26px; color: #64748b; font-size: 14px; line-height: 1.6; }
form { display: grid; gap: 9px; }
label { margin-top: 9px; font-size: 13px; font-weight: 700; color: #52647c; }
input { width: 100%; border: 1px solid #cdd9e3; border-radius: 10px; padding: 11px 13px; font: inherit; }
input:focus-visible, button:focus-visible { outline: 3px solid #8bd5dc; outline-offset: 2px; }
.error { min-height: 18px; margin: 4px 0 0; color: #b42318; font-size: 13px; }
button { border: 0; border-radius: 10px; background: #087f88; color: #fff; font: inherit; font-weight: 700; padding: 12px; cursor: pointer; }
button:hover { filter: brightness(.97); }
.note { margin: 22px 0 0; color: #8996a8; font-size: 12px; }
@media (max-width: 520px) { .login-card { padding: 25px 20px; } }