Header

<nav class="nav">
  <ul>
    <li>Домой</li>
    <li>About</li>
    <li>Services</li>
    <li>Whatever</li>
    <li>Contact</li>
    <span class="hover-hack hov-1"></span>
    <span class="hover-hack hov-2"></span>
    <span class="hover-hack hov-3"></span>
    <span class="hover-hack hov-4"></span>
    <span class="hover-hack hov-5"></span>
    <div class="magic">
      <ul class="clone">
        <li>Домой</li>
        <li>About</li>
        <li>Services</li>
        <li>Whatever</li>
        <li>Contact</li>
      </ul>
    </div>
  </ul>
</nav>
<link href='https://fonts.googleapis.com/css?family=Open+Sans' rel='stylesheet' type='text/css'>
//Автор: Nikolay Talanov. @suez

*, *:before, *:after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

html, body {
  height: 100%;
  font-size: 62.5%;
  background: #64B5F6;
  overflow: hidden;
}
@media (max-width: 600px) {
  html, body {
    font-size: 50%;
  }
}
@media (max-width: 480px) {
  html, body {
    font-size: 40%;
  }
}

.nav {
  position: relative;
  width: 55rem;
  height: 5rem;
  margin: 10rem auto 0;
  padding: 0 1rem;
  background: #25f1b0;
  transform: skewX(-30deg);
  text-align: center;
  border-radius: 0.5rem;
  box-shadow: 0.3rem 0.3rem 0.3rem rgba(0, 0, 0, 0.3);
}

ul {
  display: inline-block;
  list-style-type: none;
}
ul:after {
  content: "";
  display: table;
  clear: both;
}

li {
  position: relative;
  display: inline-block;
  float: left;
  height: 100%;
  padding: 0 1rem;
  font-family: 'Open Sans';
  font-size: 2rem;
  line-height: 5rem;
  text-align: center;
  text-transform: uppercase;
  color: #fff;
  transform: skewX(30deg);
  cursor: pointer;
  -webkit-font-smoothing: antialiased;
  -webkit-backface-visibility: hidden;
          backface-visibility: hidden;
}

.hover-hack {
  z-index: 3;
  display: block;
  position: absolute;
  top: 0;
  height: 100%;
  cursor: pointer;
  transform: skewX(30deg);
}
.hover-hack.hov-1 {
  left: 2.1rem;
  width: 8rem;
}
.hover-hack.hov-1:hover ~ .magic {
  transform: translateX(0);
  width: 8rem;
}
.hover-hack.hov-1:hover ~ .magic .clone {
  transform: translateX(0);
}
.hover-hack.hov-2 {
  left: 10.1rem;
  width: 8.6rem;
}
.hover-hack.hov-2:hover ~ .magic {
  transform: translateX(8rem);
  width: 8.6rem;
}
.hover-hack.hov-2:hover ~ .magic .clone {
  transform: translateX(-8rem);
}
.hover-hack.hov-3 {
  left: 18.7rem;
  width: 10.7rem;
}
.hover-hack.hov-3:hover ~ .magic {
  transform: translateX(16.6rem);
  width: 10.7rem;
}
.hover-hack.hov-3:hover ~ .magic .clone {
  transform: translateX(-16.6rem);
}
.hover-hack.hov-4 {
  left: 29.4rem;
  width: 12.4rem;
}
.hover-hack.hov-4:hover ~ .magic {
  transform: translateX(27.3rem);
  width: 12.4rem;
}
.hover-hack.hov-4:hover ~ .magic .clone {
  transform: translateX(-27.3rem);
}
.hover-hack.hov-5 {
  left: 41.8rem;
  width: 11rem;
}
.hover-hack.hov-5:hover ~ .magic {
  transform: translateX(39.7rem);
  width: 11rem;
}
.hover-hack.hov-5:hover ~ .magic .clone {
  transform: translateX(-39.7rem);
}

.magic {
  z-index: 1;
  position: absolute;
  top: -0.5rem;
  left: 2.1rem;
  width: 8rem;
  height: 5.5rem;
  overflow: hidden;
  background: #f47321;
  border-radius: 0.5rem;
  transition: transform 0.5s cubic-bezier(0.77, 0.37, 0.71, 1.27), width 0.5s cubic-bezier(0.77, 0.37, 0.71, 1.27);
  box-shadow: 0 0.5rem 0 #dc6519;
}
.magic .clone {
  z-index: 2;
  position: absolute;
  top: 0.5rem;
  left: 0;
  width: 50.8rem;
  height: 5rem;
  transition: transform 0.5s cubic-bezier(0.77, 0.37, 0.71, 1.27);
}
.magic .clone li {
  color: #000;
  -webkit-font-smoothing: antialiased;
  -webkit-backface-visibility: hidden;
          backface-visibility: hidden;
  transform: translate3d(0, 0, 0) skewX(30deg) perspective(1px);
}