sphinx/doc/_themes/sphinx13/layout.html

{# Sphinx layout template for the sphinxdoc theme. #}
{%- extends "basic/layout.html" %}

{% block extrahead %}
{{ super() }}
{%- if not embedded and pagename == root_doc %}
<style>.related { display: none; }</style>
{%- endif %}
{% endblock %}

{% block header %}
<div class="pageheader">
  <a href="{{ pathto(root_doc)|e }}">
    <img src="{{ pathto('_static/sphinx-logo.svg', resource=True) }}" alt="logo" />
  </a>
  <h1>Sphinx</h1>
</div>
{% endblock %}

{%- block relbar1 %}
<div class="related" role="navigation" aria-label="related navigation">
  <h3>{{ _('Navigation') }}</h3>
  <ul>
    <li><a href="{{ pathto(root_doc)|e }}">Documentation</a> &raquo;</li>
    {%- for parent in parents %}
      <li class="nav-item nav-item-{{ loop.index }}"><a href="{{ parent.link|e }}" {% if loop.last %}{{ accesskey("U") }}{% endif %}>{{ parent.title }}</a>{{ reldelim1 }}</li>
    {%- endfor %}
    <li class="nav-item nav-item-this"><a href="{{ link|e }}">{{ title }}</a></li>
  </ul>
</div>
{% endblock %}

{%- block content %}
<div class="document">
  <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
    {%- include "searchfield.html" %}
    <div class="sphinxsidebar-navigation__contents">
      <h3>{{ _('On this page') }}</h3>
      {{ toc }}
    </div>
    <div class="sphinxsidebar-navigation__pages">
      <h3>{{ _('Site navigation') }}</h3>
      {{ toctree(includehidden=True, maxdepth=3, titles_only=True) }}
    </div>
  </div>
  {%- block document %}
  <div class="body" role="main">
    {% block body %}{% endblock %}
  </div>
  {%- endblock %}
</div>
{%- endblock %}

{%- block relbar2 %}{% endblock %}

{%- block footer %}
<div class="footer" role="contentinfo">
  {{ copyright_block() }}
  {% trans sphinx_version=sphinx_version|e %}Created using <a href="https://www.sphinx-doc.org/">Sphinx</a> {{ sphinx_version }}.{% endtrans %}
</div>
{%- endblock %}