@media screen and (max-width: 640px)
{

    #aHamburger div
    {
        background-color: rgb(255,255,255);
    }
    
    #aHeaderLogo
    {
        left: 10px;
    }
    
    #divOldalHeader
    {
        background-position: left;
        height: 16vw;
    }
}