button {
  //width:200px;
  //display:block;
  height:50px;
  font-size:20px;
  color:black;
  background-color: silver;
}

.tabs {
  border:solid 1px #000;
  padding:10px;
  //width:400px;
  display:none;
  background-color: silver;
  color:black;
}