body {
            background-color: #f8f9fa;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            margin: 0;
        }
        .container {
            text-align: center;
        }
        .btn-custom {
            margin: 0.5rem 0;
            width: 100%;
        }