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);
  }