* {
     margin: 0;
     padding: 0;
     box-sizing: border-box;
 }

 body, main img {
     
    width: 100%;
    height: 100%;

 }
 main {

   width: 50%;
   height: 50%;
   position: absolute;
   top: 12.5%; left: 25%;
 }

 footer {

    position: absolute;
    bottom: 0;
    left: 0;
    background-color: #ddd;
    width: 100%;

 }

footer .impressum {
    font-size: 0.8rem;
font-family: sans-serif;
line-height: 100%;
margin: 2rem;
color: #666;
}