form#matratzenrechner {
    display:flex;
    flex-wrap:wrap;
    justify-content: space-between;
    background: aliceblue;
    padding-top:35px;
    padding-bottom:15px;
    padding-left:15px;
    padding-right:15px;
}
input#rechnerbutton {
  height:36px;
  background: #4BACC6;
  color: white;
  font-size:20px;
  margin-top:28px;
}
input#rechnerbutton:hover {
  background: #4D779D;
  transition:0.3s;
}

div.rechnerbox {
  padding-bottom:25px;
}
@media only screen and (max-width: 552px) {
div.rechnerbox {
width:100%;
}
}