#page-loading {
    position: fixed;
    z-index: 9999;
    top: 0px;
    left: 0px;
    right: 0px;
    bottom: 0px;
    text-align: center;
    padding-top: 50vh;
    background: rgba(255,255,255,.5);
    display: none;
}
#page-loading .loading-container {
    display: inline-block;
    width: 90%;
    padding: 24px;
    background: rgba(0,0,0,.9);
    color: white;
    border-radius: 10px;
    transform: translateY(-70%);
}