body { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 16px; background: linear-gradient(135deg, #007a8c, #00a7bd); }
.card { background: #fff; border-radius: 16px; padding: 28px; width: 100%; max-width: 380px; box-shadow: 0 20px 50px rgba(0,0,0,.25); }
.card h1 { margin: 0 0 4px; font-size: 22px; color: #0097ad; }
.card p { margin: 0 0 18px; color: #6b7280; }
.card label { display: block; font-size: 13px; color: #6b7280; margin: 12px 0 4px; }
.card input { width: 100%; padding: 10px 12px; border: 1px solid #e5e7eb; border-radius: 10px; }
.card button { width: 100%; margin-top: 20px; padding: 11px; border: 0; border-radius: 10px; background: #0097ad; color: #fff; font-weight: 600; }
.err { background: #fee2e2; color: #b91c1c; padding: 8px 12px; border-radius: 8px; margin-bottom: 8px; font-size: 13px; display: none; }
.card .brand { display: block; width: 130px; margin: 0 auto 6px; }
.card > p { text-align: center; }
.card input:focus { outline: none; border-color: #0097ad; box-shadow: 0 0 0 3px #e3f5f8; }