#bg-css {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background-image: url(landschaft.png), url(front-bg-0260.jpg);
    background-position: bottom, center;
    background-repeat: no-repeat, no-repeat;
    transition: ease all .5s;
	background-size: 80% auto, cover;
}