#dms-preloader {
    position: fixed;
    z-index: 99999;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
}
#dms-preloader img {
    width: 150px;
    height: auto;
}