#modal-loader {
    height: 100% !important;
    width: 100% !important;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 999;
    position: absolute !important;
    top: 0px;
    background-image: url(/images/loading.gif);
    background-repeat: no-repeat;
    background-position: center;
}