@import url(https://fonts.googleapis.com/css?family=Lato);



ul li {
  padding: 6px 0;
}
ul li a {
  position: relative;
  display: block;
  padding: 4px 0;
  font-family: Lato, sans-serif;
  color: #ecf0f1;
  text-decoration: none;
  text-transform: uppercase;
  transition: 0.5s;
}
ul li a::after {
  position: absolute;
  content: "";
  top: 100%;
  left: 0;
  width: 100%;
  height: 3px;
  background: #000000;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.5s;
}
ul li a:hover {
  color: #ffffff;
}
ul li a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}