/* ===== Piano area ===== */
.piano-container {
  display: flex;
  justify-content: center;
}

.piano-keys-list {
  list-style: none;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 0;
  margin: 0;
}

/* White keys */
.white-key {
  width: 80px;
  height: 350px;
  background: white;
  border: solid black 2px;
  z-index: 1;
}

/* Black keys */
.black-key {
  width: 35px;
  height: 210px;
  margin: 0 -20px 0 -20px; /* overlay spacing */
  z-index: 2;
  background: black;
}