body {
    background: linear-gradient(135deg, #007bff 0%, #6610f2 100%);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.card {
    border-radius: 15px;
    background: #fff;
}

h3 {
    font-size: 1.5rem;
}

input:focus {
    border-color: #007bff !important;
    box-shadow: 0 0 5px rgba(0,123,255,.5) !important;
}