.calcarea {
  font-size: 0;
}

.calcarea .btn {
  width: 25%;
  padding: 3% 0;
  -webkit-border-radius: 0;
  border-radius: 0;
  border: none;
  box-shadow: 0 0 5px #eee;
  opacity: 1;
  font-size: 42px
}

#jsqPrompt {
  font-size: 24px;
  margin-bottom: 10px;
  font-weight: bold;
}

#jsqResult {
  height: 48px;
  font-size: 36px;
  background: none;
  border: none;
  -webkit-box-shadow: none;
  font-weight: bold;
  box-shadow: none
}

.calcarea .btn:focus,
.calcarea .btn:active,
.calcarea .btn:active:focus,
.calcarea .btn:active:hover {
  background: #eee;
}

@media (max-width:767px) {
  #jsqResult {
    font-size: 22px;
  }

  .calcarea .btn {
    font-size: 18px;
  }
}