/***
 *** Ab hier responsive Angaben
 ***/
 @media (max-width: 620px) {
  header{
      clip-path: polygon(0 0, 100% 0, 100% 80%, 0 200px);
      background: #a82e0f;
  }
  footer{
      clip-path: polygon(0 20%, 100% 0, 100% 100%, 0 200px);
      background: #a82e0f;
  }
}
@media (max-width: 400px){
  .box {
    width: 100%;
  }
}