#Header{
    background-image: url('../gfx/logo_buhlergroup.png');
}

@media screen and (max-width: 890px){
    #Header{
        background-position: 50% 8px;
    }
}

#CentralSpaceLogin #loginform{
    background: #3a3a3a url('../gfx/logo_big_buhlergroup.png') no-repeat 50% 46px;
}