body{margin:0;min-height:100vh;display:flex;align-items:center;justify-content:center;font-family:Inter,Segoe UI,Roboto,Arial,sans-serif;background:radial-gradient(circle at top,#1e3a8a,#020617)}
.card{width:100%;max-width:430px;margin:20px;background:#fff;border-radius:20px;padding:34px 28px;box-shadow:0 30px 80px rgba(0,0,0,.35)}
h1{margin:0 0 8px;text-align:center;font-size:26px}
p{color:#64748b;text-align:center;line-height:1.45}
label{display:block;font-size:14px;font-weight:700;margin-bottom:6px;color:#334155}
input{width:100%;box-sizing:border-box;padding:13px 14px;margin-bottom:18px;border:1px solid #cbd5e1;border-radius:12px;font-size:15px}
button{width:100%;border:0;border-radius:12px;padding:13px 14px;background:#2563eb;color:#fff;font-size:16px;font-weight:800;cursor:pointer}
.alert{padding:12px;border-radius:10px;margin-bottom:18px;font-size:14px;text-align:center}
.alert.success{background:#dcfce7;color:#166534}
.alert.error{background:#fee2e2;color:#7f1d1d}
.back{display:block;margin-top:18px;text-align:center;color:#64748b;text-decoration:none;font-weight:700}