<header>
  <div class="flexbox">
    <div class="center-on-mobiles">
      <h1>
        <a href="/" class="logo">
          <span class="sr-only">Jekyll</span>
          <img src="/img/logo-2x.png" width="140" height="65" alt="Jekyll Logo">
        </a>
      </h1>
    </div>
    <nav class="main-nav hide-on-mobiles">
      {% include primary-nav-items.html %}
    </nav>
    <div class="search hide-on-mobiles">
      {% include search/input.html %}
    </div>
    <div class="meta hide-on-mobiles">
      <ul>
        <li>
          <a href="{{ site.repository }}/releases/tag/v{{ site.version }}">v{{ site.version }}</a>
        </li>
        <li>
          <a href="{{ site.repository }}">GitHub</a>
        </li>
      </ul>
    </div>
  </div>
  <nav class="mobile-nav show-on-mobiles">
    {% include mobile-nav-items.html %}
  </nav>
</header>