.content {
    margin: 0 auto;
    padding: 20px;
}
.modal {
    display: none;
    height: 100vh;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 9999;
}
.modal_bg {
    background: rgba(0,0,0,0.8);
    height: 100vh;
    position: absolute;
    width: 100%;
}
.modal_content {
    background: rgba(0,0,0,0.8);
    left: 50%;
    padding: 20px;
    position: absolute;
    top: 50%;
    transform: translate(-50%,-50%);
    width: 80%;
    max-width: 640px;
}
.modal_content a {
    color: #fff;
}
a.js-modal-close {
    position: absolute;
    top: -32px;
    right: -32px;
}