{% macro toc(page, type="text") %}
{% if page.toc %}
<strong>Contents</strong><br>
<ul>
    {% for h1 in page.toc %}
    <li>
        <a href="{{ h1.permalink | safe }}">{{ h1.title }}</a>
        {% if h1.children %}
        <ul>
            {% for h2 in h1.children %}
            <li>
                <a href="{{ h2.permalink | safe }}">{{ h2.title }}</a>
            </li>
            {% endfor %}
        </ul>
        {% endif %}
    </li>
    {% endfor %}
</ul>
{% endif %}
{% endmacro input %}