#page-loading {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 9999;
    width: 100%;
    height: 100vh;
}
#page-loading.is-active {
    display: block;
}
#page-loading .overlay {
    position: absolute;
    top: 0;
    left: 0;
    display: -webkit-flex;
    display: flex;
    -webkit-justify-content: center;
    justify-content: center;
    -webkit-align-items: center;
    align-items: center;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.2);
    user-select: none;
}
#page-loading .spinner img {
    width: 60px;
}