#contentbox{top: 0%;}
#mainback{	height: 80%;}
#menu{top: 0%;}
#logo{padding-top: 21%;max-width: 195px;height: 75%;}


@media only screen and (max-width: 800px) {
#mainback{background-size: cover; background-position:50%;height:100%; }	
#logo{width: 150px;height: 90%;padding-top: 35%;}
#contentbox{padding-left: 20px;padding-right: 20px;}
#menu{    top: 52px;}
}