html, body {
  font-family: 'Roboto';
  height: 100%;
  padding: 0;
  margin: 0;
}

body {
  background: linear-gradient(90deg, #0099FF 0%, #6610f2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  color: #fff;
  font-size: 25px;
  text-shadow: 2px 2px 2px rgb(0, 0, 0, 0.6);
  font-weight: 700;
}

.container {
  width: 200px;
  height: 200px;
  perspective: 600px;
}

.cube {
  position: relative;
  width: 200px;
  height: 200px;
  transform-style: preserve-3d;
  transition: transform 1s;
  cursor: pointer;
}

.cube:hover {
  transform: rotateY(-180deg);
}

.cube-side {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 200px;
  height: 200px;
  position: absolute;
  box-shadow: 0px 0px 15px 0px rgba(0,0,0,0.25);
}

.front {
  transform: translate3d(0, 0, 100px);
  background: #ffbe00;
}

.back {
  transform: rotateY(180deg) translate3d(0, 0, 100px);
  background: #ffbe00;
  color: #fff;
}

.right {
  background: #FFD773;
  transform: rotateY(90deg) translate3d(0, 0, 100px);
}