nav {
  margin: 0;
  padding: 0;
}

nav ul {
  margin-left: auto;
  margin-right: auto;
  height: 40px;
  font-size: 14px;
  font-weight: 500;
  list-style-type: none;
  text-align: center;
}

nav li {
  display:inline;
  padding: 0;
  line-height: 20px;
}

nav li a {
  color: #BABABA;
  margin-left: 5px;
  margin-right: 5px;
  padding-left: 10px;
  padding-right: 10px;
  padding-top: 5px;
  padding-bottom: 5px;
  min-width: 40px;
}

nav li a:hover
{	
  color:#FFFFFF;
  text-shadow: none;
  border-bottom-width: thick;
  border-bottom-style: solid;
  border-bottom-color: yellow;
  text-decoration: none;
  transition-property: color;
  transition-duration: 0.3s;
}

nav li.active a
{
  color:#FFFFFF;
  border-bottom-width: thick;
  border-bottom-style: solid;
  border-bottom-color: yellow;
}