.pk_loader {
    background: rgba(0, 0, 0, 0.5);
    position: fixed;
    top: 0px;
    bottom: 0;
    left: 0;
    right: 0;
    margin: 0 !important;
    z-index: 9999999999;
    text-align: center;
    padding: 23% 0 0;
}