site/_src/_includes/menu-main.html

<nav class="menu menu--main">
    <div class="row row--wide">

        <div class="grid grid--full grid-medium--columns grid--center">
            <div class="grid__col grid__col--1">
                <a class="menu__logo" href="/">
                    <svg class="logo logo--sm logo--white--green" aria-labelledby="title">
                        <title>Logo</title>
                        <use xlink:href="/assets/img/sprite.svg#logo"></use>
                    </svg>
                </a>
            </div>

            <div class="grid__col grid__col--5">

                <div class="menu-overflow">
                    {% for link in site.data.menus.main %}

                        {% assign active = nil %}
                        {% if page.url contains link.url %}
                            {% assign active = 'active' %}
                        {% endif %}

                        <a class="menu__link {{ active }} js-tracking-menu" href="{{ link.url }}">{{ link.title }}</a>

                    {% endfor %}
                </div>

            </div>
        </div>
    </div>
</nav>