.title {
  display: flex;
  justify-content: center;
  align-items: center;
}
ul {
  display: flex;
  list-style: none;
  justify-content: center;
}
ul .key {
  position: relative;
  width: 60px;
  height: 180px;
  border: 1px solid black;
  cursor: pointer;
  display: flex;
  background: #fffff0;
  justify-content: center;
  align-items: flex-end;
  border-radius: 5px;
}
ul .black-key {
  position: absolute;
  width: 45px;
  left: 37.5px;
  height: 120px;
  display: flex;
  background: black;
  color: white;
  justify-content: center;
  border-radius: 5px;
  align-items: flex-end;
}