.atn
{
  display:  inline-grid;
  margin: 10px 0;
  width: 49%;
  height: 80px;
  border: none;
  background-color: #00a8ff;
  color: #fff;
  font-size: 18px;
  border-radius: 6px;
  outline: none;
  cursor: pointer;
  transition: .3s linear;
  text-align: center;
  vertical-align: middle; 

}

.atn1:hover {
  transform: rotateX(15deg);
  box-shadow: 0 15px 15px #00a8ff;
}

.atn2:hover {
  transform: rotateX(-15deg);
  box-shadow: 0 -15px 15px #00a8ff;
}

.atn3:hover {
  transform: rotateY(15deg);
  box-shadow: -15px 0 15px #00a8ff;
}

.atn4:hover {
  transform: rotateY(-15deg);
  box-shadow: 15px 0 15px #00a8ff;
}