cover.css

html, body {
  background-repeat: no-repeat;
  background-size: contain;
  background-position: center center;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
      -ms-flex-direction: column;
          flex-direction: column;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
  -webkit-align-items: center;
      -ms-flex-align: center;
          align-items: center;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
}

*, *:before, *:after {
  box-sizing: border-box;
  position: relative;
}

.container {
  max-width: 550px;
  padding: 0;
  margin: 0 auto;
  min-height: 200px;
  display: inline;
  -webkit-perspective: 800px;
          perspective: 800px;
  -webkit-perspective-origin: 50% 50%;
          perspective-origin: 50% 50%;
}

.book {
  position: relative;
  margin-left: 37%;
  width: 100px;
  height: 130px;
  background: #f8b899;
  border-radius: 0 15px 15px 0;
}

.book::after {
  position: absolute;
  left: 75px;
  width: 12px;
  height: 135px;
  background: #eaa583;
  content: "";
}

.title {
  margin-top: 20px;
  font-size: 2em;
  max-width: 18ch;
  text-align: center;
  font-family: 'Roboto Slab', serif;
  color: #222;
}

span {
  border-bottom-color: #ff2e01;
  border-bottom: 3px solid #f8b899;
  -webkit-transition: .3s;
  transition: .3s;
}

span:hover {
  background-color: #f8b899;
}

p {
  text-align: center;
}

a {
  text-decoration: none;
  font-weight: bold;
  color: #333;
}