ss/theme.css#L539-L578">more lines like this</a> using the <code>header-includes</code> variable:</p>
<div class="sourceCode" id="cb15"><pre class="sourceCode yaml"><code class="sourceCode yaml"><span id="cb15-1"><a href="#cb15-1" aria-hidden="true" tabindex="-1"></a><span class="pp">---</span></span>
<span id="cb15-2"><a href="#cb15-2" aria-hidden="true" tabindex="-1"></a><span class="co"># ...</span></span>
<span id="cb15-3"><a href="#cb15-3" aria-hidden="true" tabindex="-1"></a><span class="fu">header-in