#overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.7);
            color: white;
            text-align: center;
            font-size: 24px;
            z-index: 9999;
        }