[data-tab-content] {
  display: none;
}

.on[data-tab-content] {
  display: block;
}

body{
  padding: 0;
  margin: 0;
}

.tabs {
  display: flex;
  justify-content: space-around;
  list-style-type: none;
  margin: 0;
  padding: 0;
  border-bottom: 1px solid black;
   
}

.tab {
  cursor: pointer;
  padding: 10px;
  
}

.tab.on{
  background-color: #CCC;
}

.tab:hover{
  background-color: #AAA;

}

.tab-content{
  margin-left: 20px;
  margin-right: 20px;
}

.Bildgröße1 {
  width: 320px;
  

  
}