html - Removing white line from bootstrap 3 navbar-inverse dropdown menu -

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i'm making clean possible menu , have managed rid of unwanted styling. 1 little white line remains however, , i'm demanding 0 or none borders on css, trying gone.

it can seen in these images above music icon , below dropdown icon: check it with inspection

it in "small screen mode" , dropdown active shows up.

custom navbar css

.navbar { background-color: transparent; background: transparent; border: 0; }  .navbar li {   color: white;  font-size: 14px; }  .collapse { border: 0; }  #mynavbar {   border: 0; }  .navbar .dropdown-menu::after{  border:0; }  .navbar-header .navbar-collapse {  border: 0; }  .navbar.navbar-default {   padding: 10px 0;   background: rgba(0, 0, 0, .1);   border: none; }  .navbar.navbar-default .navbar-nav > li > a, .navbar.navbar-default .navbar-brand {   color: white; }  .navbar.navbar-default .navbar-collapse {   border: none;   box-shadow: none; }

the menu markup:

<nav class="navbar navbar-inverse">   <div class="container-fluid">     <div class="navbar-header">       <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#mynavbar">         <span class="icon-bar"></span>         <span class="icon-bar"></span>         <span class="icon-bar"></span>       </button>       <a class="navbar-brand" href="#"></a>     </div>     <div class="collapse navbar-collapse" id="mynavbar">       <ul class="nav navbar-nav navbar-right pull-right">         <li><a href="#"><span class="glyphicon glyphicon-music"></span> music</a></li>         <li><a href="#"><span class="glyphicon glyphicon-tasks"></span> web</a></li>       </ul>     </div>   </div> </nav>

and here fiddle (press computer icon run in own window):

how can point @ element him out of there?

thank or pointers!

actually box-shadow remove/overwrite 

.navbar-collapse#mynavbar {     -webkit-box-shadow: none;     box-shadow: none; }

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