<header class="header">
  <h1 class="title">{{ config.title }}</h1>
  {% if section.title %}
  <h2 class="subtitle">{{ section.title }}</h2>
  {% endif %}
  {% if page.title %}
  <h3 class="subtitle">{{ page.title }}</h3>
  {% endif %}
  <navbar class="navbar">
    <a href="{{ config.base_url }}">home</a>
  </navbar>
</header>
