body {
    background: linear-gradient(135deg, #1e3a5f 0%, #2d5a87 50%, #1e3a5f 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
.login-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    padding: 40px;
    max-width: 400px;
    width: 100%;
}
.login-lock-icon {
    font-size: 2.5rem;
}
.form-control:focus {
    border-color: #2d5a87;
    box-shadow: 0 0 0 0.2rem rgba(45, 90, 135, 0.25);
}
.btn-login {
    background: linear-gradient(135deg, #2d5a87 0%, #1e3a5f 100%);
    border: none;
    padding: 12px;
    font-weight: 600;
    border-radius: 8px;
    color: #fff;
}
.btn-login:hover {
    filter: brightness(1.06);
    color: #fff;
}