css - Adding line below navigation link bootstrap scrollspy -


i'm messing around bootstrap scroll spy , cant figure out how line below link of current section in.

should pretty simple cant it! want this:

enter image description here

so in portfolio section , in turn portfolio highlighted stupid little line below. can 1 out? can check live version here if needed.

customized class :

.navbar .nav li.active:after {    content: "\f1ac";    font-family: ionicons;    font-style: normal;    font-size: 42px;    color: #fff;    position: absolute;   // <---- add 3 lines center icon    width: 100%;    text-align: center; }

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