.instrumentSelector, .piano {
  display: flex;
  justify-content: center;
  margin: 12px auto 12px auto;
}

.white-key {
  border: 1px solid #000000;
  width: 100px;
  height: 400px;
  background-color: white;
  color: green;
  text-align: center;
}

.white-key:hover {
  background-color: #CDCDCD;
}

.black-key {
  background-color: black;
  width: 60px;
  height: 250px;
  margin-left: -30px;
  margin-right: -30px;
  z-index: 1;
  color: green;
  text-align: center;
}

.black-key:hover {
  background-color: #3F3F3F;
}

.disabled {
  color:  grey;
  opacity: 0.4;
  pointer-events: none;
}