Menu Hover Slide Effect

by davidxmartins

HTML

<nav>
  <ul>
    <li> <a href="#">Home</a> </li>
    <li> <a href="#">About</a> </li>
    <li> <a href="#">Blog</a> </li>
    <li> <a href="#">Portfolio</a> </li>
    <li> <a href="#">Contact</a> </li>
    <li class="animation start-home"></li>
  </ul>
</nav>

CSS

@import url('https://fonts.googleapis.com/css?family=Open+Sans&display=swap');

body {
  font-family: 'Open Sans', sans-serif;
  background: #2c3e50;
}

nav {
  position: relative;
  width: 590px;
  height: 50px;
  background: #34495e;
  border-radius: 8px;
  font-size: 0;
  box-shadow: 0 2px 3px 0 rgba(0, 0, 0, .1);
}

ul {
  display: contents;
}

nav li {
  position: relative;
  z-index: 1;
  display: inline-block;
  text-align: center;
}

nav a {
  font-size: 15px;
  text-transform: uppercase;
  line-height: 50px;
  color: white;
  text-decoration: none;
}

nav .animation {
  position: absolute;
  height: 100%;
  /* height: 5px; */
  top: 0;
  /* bottom: 0; */
  z-index: 0;
  background: #1abc9c;
  border-radius: 8px;
  transition: all .5s ease 0s;
}

nav li:nth-child(1) {
  width: 100px;
}

nav .start-home,
li:nth-child(1):hover~.animation {
  width: 100px;
  left: 0;
}

nav li:nth-child(2) {
  width: 110px;
}

nav li:nth-child(2):hover~.animation {
  width: 110px;
  left: 100px;
}

nav li:nth-child(3) {
  width: 100px;
}

nav li:nth-child(3):hover~.animation {
  width: 100px;
  left: 210px;
}

nav li:nth-child(4) {
  width: 160px;
}

nav li:nth-child(4):hover~.animation {
  width: 160px;
  left: 310px;
}

nav li:nth-child(5) {
  width: 120px;
}

nav li:nth-child(5):hover~.animation {
  width: 120px;
  left: 470px;
}