/* Basic styling for the modal */
#idleModal {
    display: none;
    position: fixed;
    z-index: 100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
}
.modal-content {
    background-color: #fefefe;
    margin: 25% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 300px;
    text-align: center;
}