*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', 'Open Sans', sans-serif;
}
body{
  background-color:darkcyan;
  background-image:url(http://stuffpoint.com/google/image/427016-google-hi-tech-google-wallpapers.jpg);
   background-repeat: no-repeat;
    background-size: cover;
}

ul{
  width: 90%;
  max-width: 40rem;
  margin: 1rem auto;
  display: flex;
  border-top: 3px solid #d81a91;
  border-bottom: 1px solid #ccc;
}

ul li{
  width: 25%;
  text-align: center;
  display: inline-block;
  padding: 1rem 0;
  color: azure;
  position: relative;
  font-weight: 500;
  transition: all .22s;
}

ul li:after{
  width: 100%;
  height: 2px;
  background: #d81a91;
  bottom: -1px;
  left: 0;
  content: '';
  display: block;
  position: absolute;
  opacity: 0;
}

ul li.active{
  color: lime;
}

ul li.active:after{
  opacity: 1;
}

ul li:hover{
  background: #f1f1f1;
  color: #222;
}

ul:hover li{
  color: Aqua;
}

ul:hover li:hover{
  color: Lime;
}