.btn_schriftlich_rechnen {
	background: #ffffff;
  background-image: url('menu_ico_schriftlich_rechnen_app2learn.png');
   background-repeat: no-repeat;
   background-size: contain;
   border:1px solid black;
   height:200px;
   width:200px;
  -webkit-border-radius: 28;
  -moz-border-radius: 28;
  border-radius: 28px;
  font-family: Arial;
  color: #000000;
  font-size: 100px;
  padding: 10px 20px 10px 20px;
  text-decoration: none;
}

.btn_schriftlich_rechnen:hover {
  background: #ffffff;
  background-image: url('menu_ico_schriftlich_rechnen_app2learn.png');
   background-repeat: no-repeat;
   background-size: contain;
   border:2px solid black;
   height:200px;
   width:200px;
  -webkit-border-radius: 28;
  -moz-border-radius: 28;
  border-radius: 28px;
  font-family: Arial;
  color: #000000;
  font-size: 100px;
  padding: 10px 20px 10px 20px;
  cursor:pointer;
  text-decoration: none;
}
.btn_uhrzeit {
	background: #ffffff;
  background-image: url('menu_ico_uhrzeit_app2learn.png');
   background-repeat: no-repeat;
   background-size: contain;
   border:1px solid black;
   height:200px;
   width:200px;
  -webkit-border-radius: 28;
  -moz-border-radius: 28;
  border-radius: 28px;
  font-family: Arial;
  color: #000000;
  font-size: 100px;
  padding: 10px 20px 10px 20px;
  text-decoration: none;
}

.btn_uhrzeit:hover {
  background: #ffffff;
  background-image: url('menu_ico_uhrzeit_app2learn.png');
   background-repeat: no-repeat;
   background-size: contain;
   border:2px solid black;
   height:200px;
   width:200px;
  -webkit-border-radius: 28;
  -moz-border-radius: 28;
  border-radius: 28px;
  font-family: Arial;
  color: #000000;
  font-size: 100px;
  padding: 10px 20px 10px 20px;
  cursor:pointer;
  text-decoration: none;
}
.menu_beschreibungen{text-align:center;font-family: Arial, Helvetica Neue, Helvetica, sans-serif;font-size:1em;}