html
<!-- layout.html -->
<!DOCTYPE html>
<html>
<head>
<title>{{ title }}</title>
</head>
<body>
<header>
<h1>{{ title }}</h1>
</header>
<nav>
<ul>
{% for page in pages %}
<li><a href="{{ page.url }}">{{ page.title }}</a></li>
{% endfor %}
</ul>
</nav>
<main>
{{ body }}
</main>
</body>
</html>
<!-- page.html -->
{% extends "layout.html" %}
{% block body %}
<article>
<h2>{{ article.title }}</h2>
<p>{{ article.content }}</p>
</article>
{% endblock %}
