* {
  margin: 0;
  padding: 0;
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
}

body {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  min-height: 100vh;
}

section {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-transform-style: preserve-3d;
          transform-style: preserve-3d;
  -webkit-perspective: 1000px;
          perspective: 1000px;
}

section .book {
  position: relative;
  width: 205px;
  height: 307px;
  -webkit-box-shadow: 20px 20px 20px rgba(0, 0, 0, 0.2);
          box-shadow: 20px 20px 20px rgba(0, 0, 0, 0.2);
  -webkit-transform-style: preserve-3d;
          transform-style: preserve-3d;
  -webkit-transition: .5s;
  transition: .5s;
}

section .book:hover {
  -webkit-box-shadow: 0px 20px 20px rgba(0, 0, 0, 0.2);
          box-shadow: 0px 20px 20px rgba(0, 0, 0, 0.2);
  -webkit-transform: rotateY(35deg);
          transform: rotateY(35deg);
}

section .book:active {
  -webkit-box-shadow: 0px 20px 20px rgba(0, 0, 0, 0.2);
          box-shadow: 0px 20px 20px rgba(0, 0, 0, 0.2);
  -webkit-transform: rotateY(180deg);
          transform: rotateY(180deg);
}

section .book::before {
  content: '';
  position: absolute;
  width: 75px;
  height: 100%;
  -webkit-transform-origin: left;
          transform-origin: left;
  background: url(assets/harry-potter-sides.jpg);
  background-position: center;
  background-size: cover;
  -webkit-transform: rotateY(90deg) rotateX(180deg);
          transform: rotateY(90deg) rotateX(180deg);
}

section .book::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  -webkit-transform-origin: center;
          transform-origin: center;
  background: url(assets/Harry-potter-Back-Cover.jpg);
  background-position: center;
  background-size: cover;
  -webkit-transform: rotateY(180deg) translateZ(75px);
          transform: rotateY(180deg) translateZ(75px);
}

section .book img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  -o-object-fit: cover;
     object-fit: cover;
}