h2, .eingabe, .w3-display-container, .w3-panel {
  display:none;
}
.ausgabe {
  display:block;
}
.ausgabe button {
  display:none;
}
.kaertchen {
  border-style:solid !important;
  border-width:1px;
  border-color:#000000;
  width:280px;
  padding:5px;
  display:inline-block;
  margin:5px;
  box-sizing:border-box;
}