.nev-wrapper {
  font-family: Lato, Sans-serif
  background: #fff;
  margin: 0;
  width: 400px;
  height: 400px;
  padding: 10px;
  perspective: 1500px;
}
.nev-menu {
  margin: 120px 20px 50px 100px;
  position: relative;
  background: #c8e8ff;
  background: linear-gradient(to bottom, hsl(220, 92%, 80%) 0%, hsl(125, 63%, 73%) 60%);
  width: 300px;
  height: 350px;
  border-width: 0px 0;
  border-style: solid;
  border-color: #28eb1b;
  color: #ffffff;
  transform-style: preserve-3d;
  box-shadow: 0 1px 2px 0 #9dd1ff;
  transform: translateY(-150px) rotateX(35deg) rotateZ(35deg);

}
.nev-menu:before {
  content: '';
  position: absolute;
  height: 30px;
  width: 300px;
  top: 370px;
  left: 0px;
  transform: rotateX(90deg) translateY(-15px) translateZ(36px);
  background: #005c9c40;
}
.nev-menu:after {
  content: '';
  position: absolute;
  height: 350px;
  width: 30px;
  top: -1px;
  right: -30px;
  transform: rotateY(90deg) translateZ(-15px) translateX(15px);
  border-width: 0px 0;
  border-style: solid;
  border-color: #031c26;
  background: #d1ecff;
}
.nev-top {
  padding: 15px 0px 15px 20px;
  width: 100%;
}

.middle {
  position: relative;
  min-height: 40px;
  list-style: none;
  padding: 0;
  margin: 0;
  font-weight: bold;
  font-size: 20px;
  transform-style: preserve-3d;
}
.book {
  margin: 0;
  padding: 15px 0 15px 40px;
  outline: 0 none;
  position: relative;
  transform-style: preserve-3d;
  transform: translateZ(1px);
  z-index: 1;
}
.book:hover {
  box-shadow: inset 0 0 80px 0 rgba(255, 255, 255, 0.3);
  cursor: pointer;
}
.menu-back {
  position: absolute;
  background: transparent;
  top: -10px;
  left: 0px;
  width: 300px;
  height: 300px;
  transform: translateZ(-29px);
  box-shadow: 10px 60px 35px -20px #555555c9;
}