Hope you can help - I left this issue on the backburner for a while now. It started when I was trying to recolor the default bootstrap navbar...but then I got in a mess and removed all the css to go back to default....and now the navbar toggle icon for the mobile size viewport has disappeared (it still exists but I can't seem to find why it's invisible(!). I've tried fiddling around with CSS to 'color' it but I'm having no luck...

Thanks in advance!

```html
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>

<!DOCTYPE HTML>
<html lang="en">
<head>
</head>
<body>
 <header>
  <nav class="navbar navbar-custom" role="navigation">
   <div class="container-fluid">      
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
     <span class="sr-only">Toggle navigation</span>
     <span class="icon-bar"></span>
     <span class="icon-bar"></span>
     <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#">Brand</a>
    </div>

    <!-- Collect the nav links, forms, and other content for toggling -->    
    <div id="navbar" class="navbar-collapse collapse">     
     <ul class="nav navbar-nav"> 
      <li><a href="index.php">Home</a></li>
      <li><a href="store.php">Store</a></li>
      <li><a href="events.php">Events</a></li>
      <li><a href="forum.php">Feedback</a></li> 
      <li><a href="contact.php">Contact</a></li>
     </ul>  
     <ul class="nav navbar-nav navbar-right">
      <li><a href="aboutus.php">About Us</a></li>
      <li class="dropdown">
       <a href="#" class="dropdown-toggle" data-toggle="dropdown"><span class="glyphicon glyphicon-user"></span>User<span class="caret"></span></a>
       <ul class="dropdown-menu" role="menu">
        <li><a href="login.php"><span class="glyphicon glyphicon-log-in"></span> Login</a></li>
        <li><a href="logout.php"><span class="glyphicon glyphicon-log-out"></span> Logout</a></li>
       </ul>
      </li>
     </ul>
    </div>   
   </div><!-- /.container-fluid -->
  </nav>                  
 </header>
</body>
</html>
```