oliverdavies.uk/source/_includes/nav.html.twig

<header class="w-100 ph4-ns bg-white bb b--light-gray mb2">
  <div class="db dt-ns mw9 center w-100">
    <div class="db dtc-ns v-mid tl w-30">
      <a href="/" class="dib f5 mt0 link black-70" title="Home">
        {{ site.title }}
      </a>
    </div>

    <nav class="db dtc-ns v-mid w-100 tl tr-ns mt2 mt0-ns">
        {% for link in site.nav_links %}
            <a href="{{ link.href }}" class="nav-item {{ page.url matches '#^' ~ (link.pattern ?: link.href) ~ '/?#' ? 'nav-item--active' }}">
                {{- link.title -}}
            </a>
        {% endfor %}
    </nav>
  </div>
</header>