#first {
  text-align: center;
  font-size: 38px;
  font-family: Times, "Times New Roman", Georgia, serif; 
  text-decoration: underline;
}

#whole {
  margin-right: auto;
  margin-left: auto;
}

ul {
 display: flex; 
 list-style: none;
 justify-content: center;
}

/* white keys */
ul .key {
  position: relative;
  width: 60px;
  height: 180px;
  border: 1px solid black;
  cursor: pointer;
  display: flex;
  background: cornsilk;
  justify-content: center;
  align-items: flex-end;
  border-radius: 5px;
}

/* black keys */
ul .black-key {
 	position: absolute; 
 	width: 45px;
  left: 20.5px;
  bottom: 60px;
  height: 120px;
  display: flex;
  background: black;
  color: white;
  justify-content: center;
  border-radius: 5px;
  align-items: flex-end;
}