div.slider-loading-overlay {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    background-image: url('loading.gif');
    background-repeat: no-repeat;
    background-position: center center;
}

div.slider-slide {
    background-position: center center;
    background-size: cover;
    background-repeat: no-repeat;
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0px;
    left: 0px;
}