{%- macro toc_item(url, item, level_diff, ul_css_class="", link_css_class="") %}
{%- if level_diff < 0 %}
{%- for _x in range(level_diff|abs) %}
</li>
</ul>
{%- endfor %}
{%- if item is not none %}
</li>
<li>
{%- endif %}
{%- elif level_diff > 0 %}
{%- for _x in range(level_diff) %}
<ul {% if ul_css_class %}class="{{ ul_css_class }}"{% endif %}>
<li>
{%- endfor %}
{%- else %}
</li>
<li>
{%- endif %}
{%- if item is not none %}
    <a href="{{ local_link(url) }}#{{ item.element_id }}" {% if link_css_class %}class="{{ link_css_class }}"{% endif %}>{{ item.element_title }}</a>
{%- endif %}
{%- endmacro %}

{%- macro toc(page, levels=(1, 2, 3), ul_css_class="", link_css_class="") %}
{%- for item, level_diff in md.toc(page.content, levels) %}
{{- toc_item(page.url, item, level_diff, ul_css_class=ul_css_class, link_css_class=link_css_class) -}}
{%- endfor %}
{%- endmacro %}