.header {background-image: url(/fileadmin/_processed_/5/b/csm_topbg_c55a216288.jpg)}    height: auto;
    position: relative;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
    background-position: center center fixed;
    border: 1px solid #fff;