body {
        background: #f8f9fa;
    }

    .card {
        border-radius: 1rem;
    }

    .btn-main {
        background: linear-gradient(90deg, #198754, #0d6efd);
        border: none;
        color: #fff;
        font-weight: 600;
    }

    .btn-main:hover {
        opacity: .9;
    }

    h3 {
        letter-spacing: 0.5px;
    }