#modal {
    z-index: 1;
    background-color: rgba(0, 0, 0, 1.3);
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
}
#modal>#content {
    width: 300px;
    margin: 100px auto;
    padding: 20px;
    position: relative;
    background-color: #fff;
    color: black;
    top: 25%;
}
#modal .close {
    position: absolute;
    top: 4px;
    right: 4px;
    font-size: 20px;
    border: 0;
    background-color: #fff;
}

#modal .close:hover,
#modal .close:focus {
    color: #000;
    text-decoration: none;
    cursor: pointer;
}