<nav class="navbar navbar-expand-md navbar-dark bg-primary">
    <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarNavDropdown" aria-controls="navbarNavDropdown" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
    </button>
    <a class="navbar-brand" href="{{ '/' | relative_url }}">
        {{ site.brand }}
    </a>
    <div class="collapse navbar-collapse" id="navbarNavDropdown">
        <ul 