*{
    margin:0;
    padding:0;
    box-sizing: border-box;
    text-align: justify;

}


 
ul li a  {
  position: relative;
  text-decoration: none;  
  color: #fff;
}


ul li a:before  {
  content: "";
  position: absolute;
  width: 100%;
  height: 3px;
  bottom: 0;
  left: 0;
  background-color: #78D1A7;
  visibility: hidden;
  -webkit-transform: scaleX(0);
  transform: scaleX(0);
  -webkit-transition: all 0.3s ease-in-out 0s;
  transition: all 0.3s ease-in-out 0s;
}

ul li a:hover:before {
  visibility: visible;
  -webkit-transform: scaleX(1);
  transform: scaleX(1);

} 


ul li a:hover{
 color:grey;

}