#an, #tm {float:left; width:50%; height:100%;}
#auswahl, #bauhut {margin:0;}
#an {visibility:hidden; background-color:hsl(34,55%,55%);}/*#cc9955*/
#tm {background-color:hsl(195,30%,55%);}/*#6699aa*/
#an:hover {background-color:hsl(34,60%,60%);}/*#ddaa66*/
#tm:hover {background-color:hsl(195,35%,60%);}/*#77aabb*/
#auswahl {width:100%; height:60%;}
#bauhut {width:100%; height:40%; padding-top:1%; box-sizing:border-box;}
#bauhut:hover {background-color:hsl(0,0%,82%);}