.FilpBook_bg{
    background-size: cover !important;
    width: 100% !important;
    height: 100%;
    margin: 0 auto;
    position: absolute !important;
    min-height: unset !important;
    background-color: #333 !important;
    top: 0;
}
.FilpBook{
    width: 100%;
    height: 100%;
    overflow: hidden;
}