Please run the following snippet:
https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css
<link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" />  
<div class="navbar navbar-default navbar-fixed-top" role="navigation">
    <div class="navbar-header">
        <a class="navbar-brand" href="#">
            <span class="glyphicon glyphicon-home"></span>
        </a>
        <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target=".navbar-collapse">
            <span class="sr-only">Toggle navigation</span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
        </button>
    </div>
    <div class="navbar-collapse collapse">
        <ul class="nav navbar-nav navbar-right">
            <div class="navbar-form">  
                <button>Sign in</button>
            </div>
        </ul>
    </div>
</div>
<div data-momentum="">
    <div class="page">
       <div class="list-group">
            <a class="list-group-item" href="#">First link</a>
            <a class="list-group-item" href="#">Second link</a>
            <a class="list-group-item" href="#">Third link</a>
            <a class="list-group-item" href="#">Last link</a>
        </div>
    </div> 
</div>
Notice that the first link is completely hidden under the navbar.
How could I edit the HTML/CSS so that the content is never hidden? (Even if the navbar's height increases)