I am trying to extend the lines full width of a navbar instead of just covering the links. I think the code/stylesheet on line 7(include) is interfering with the html style tags below Lines 12-21. However if I remove this line then the background which is dark disappears and the links are displayed as a list instead.
<!doctype html>
<html>
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"></script>
</head>
<style>
.navbar-nav a {
border-top:3px solid #DB9842;
border-bottom: 3px solid #DB9842;
}
</style>
<body>
<div>
<nav class="navbar-nav navbar-expand-sm bg-dark">
<ul class="navbar-nav">
<li class="nav-item">
<a class="nav-link" href="#">Link 1</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link 2</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link 3</a>
</li>
</ul>
</nav>
</div>
</body>
</html>