.as_loader-downloading {
    position: fixed;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
}

    .as_loader-downloading img {
        animation: spin 7s infinite linear;
        -webkit-animation: spin 7s infinite linear;
        -moz-animation: spin 7s infinite linear;
    }