#calculator {
  border: 2px outset #999;
  background-color: #ccc;
  color: #000;
  margin: auto;
}

#calculator td {
  padding: 2px;
  margin: 0;
}

#calculator #solar {
  width:80px;
  height:20px;
  margin:7px;
  padding: 1px;
  background-color: #000;
  color: #fff;
}

#calculator #solar td {
  background-color: #900;
}

#calculator #anzeige {
  width: 97%;
  text-align: right;
  font-family: Courier, monospace;
  background-color: #b5cbb5;
  color: #577357;
  padding: 2px;
  border: 2px inset #999;
}

#calculator .cal {
  width: 40px;
  font-weight: bold;
  font-family: monospace;
}