Bootstrap dropdown-menu is not working

Hello my bootstrap nav is not dropping down into different sections like I've seen it in examples on multiple sites. I've tried moving things around but to no avail. I feel like I'm missing something very simple though so any input would be much obliged :D

<!DOCTYPE html>
<html>

<head>
    <link rel="stylesheet" type="text/css" href="/styles/style.css">
    <link rel=stylesheet type="text/css" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
    <title>Personal Portfolio</title>
</head>

<body>

    <nav class="navbar navbar-inverse">
        <div class="container">
            <div class="navbar-header">
                <a class="navbar-brand" href="#">WebSiteName</a>
            </div>
            <ul class="nav navbar-nav">
                <li class="active"><a href="#">Home</a></li>
                <li class="dropdown">
                    <a class="dropdown-toggle" data-toggle="dropdown" href="#">Page 1
        <span class="caret"></span></a>
                    <ul class="dropdown-menu">
                        <li><a href="#">Page 1-1</a></li>
                        <li><a href="#">Page 1-2</a></li>
                        <li><a href="#">Page 1-3</a></li>
                    </ul>
                </li>
                <li><a href="#">Page 2</a></li>
                <li><a href="#">Page 3</a></li>
            </ul>
        </div>
    </nav>

    <footer>
    </footer>

</body>

</html>

AN EXAMPLE :D

https://jsfiddle.net/pajdnLwv/