.flyout-backdrop {
    background-color: rgba(0,0,0,0.5);
    bottom: 0;
    left: 0;
    position: fixed;
    right: 0;
    top: 0;
    z-index: 900;
    /*opacity:unset;*/
    overflow: auto;
}

    .flyout-backdrop.fade.show {
        opacity: 1;
    }

    .flyout-backdrop img.Loadding {
        height: 50px;
        width: 50px;
        margin-top: calc(50vh - 25px);
        margin-left: calc(50vw - 25px);
    }