nav{
  width: 19%;
  min-width: 150px;
}

.menu,
.menum {
  margin: 1%;

  width: 95%;
}

.Hauptbereich{
  width: 80%;
}

.Logo{
  width: 80%;
  height: 80%;
}

.t2b1{
  width: 48%;
  float: left;

  text-align: center;
  vertical-align: middle;
}
.t2b2{
  width: 48%;
  float: left;

  text-align: center;
  vertical-align: middle;
}
.t3b1{
  float: left;
  margin: 0%;

  width: 48%;

  text-decoration: none;
}
.t3b2{
  float: right;
  margin: 0%;

  width: 48%;

  text-decoration: none;
}
.t3b3{
  float: right;
  margin: 0%;

  width: 48%;

  text-decoration: none;
}