.fullscreen-spinner {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 1000;
    transition: all .4s ease-in-out;
    backdrop-filter: blur(5px) brightness(80%);
    display: none;
}
.fullscreen-spinner.wait-for-download {
    display: block;
}
.fullscreen-spinner--img {
    width: 150px;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    margin: auto;
}