.contained {
  position: absolute;
  top:50%;
  left: 50%;
  transform: translate(-50% , -50%)
}

.dot {
  height: 80vh;
  width: 80vh;
  background-color: yellow;
  border-radius: 50%;
  border: 4vh solid green;
  color: green;
  font-family: 'Comic Sans MS', 'Chalkboard SE', 'Comic Neue', sans-serif;
  font-size: 15vh;
  font-style: italic;
  line-height: 80vh;
  display: flex;
  justify-content: center;
  -webkit-user-select: none; /* Safari */
  -moz-user-select: none; /* Firefox */
  -ms-user-select: none; /* IE10+/Edge */
  user-select: none; /* Standard */
}

.dot:active {
    background-color:green;
    height: 84vh;
    width: 84vh;
    border: 6vh solid green;
}

@media (orientation: portrait) {
  .dot {
    height: 80vw;
    width: 80vw;
    border: 4vw solid green;
    line-height: 80vw;
    font-size: 15vw;
  }

  .dot:active {
      height: 84vw;
      width: 84vw;
      border: 6vw solid green;
  }
}