ul#bnbSlider {
    position: absolute!important;
    top:0px;
    left: 0px;
    width: 100%;
    height: 100%;
    margin: 0px;
    padding: 0px;
}

ul#bnbSlider li.bnbSlide {
    position: absolute;
    display: none;
    z-index: -3;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
}
ul#bnbSlider li.bnbSlide:first-child{
    z-index: -2;
    display: block;
}

ul#bnbSlider li.active-slide {
    z-index: 0;   
    display: block;
}