title: rMarkdown PDF doesn't read CSS
body: <p>I'm knitting an rMarkdown file into PDF. </p>
  
  <p>I've added css styling at the top of the RMD file, but the generated PDF doesn't change accordingly.</p>
  
  <p>Does the knitr PDF reads CSS settings?</p>
  
  <pre><code>---
  documentclass: article
  geometry: margin=0.5cm
  output:
    pdf_document: default
  ---
  &lt;style type="text/css"&gt;
  
  h1.title {
    font-size: 20px;
    font-weight: bold;
    font-family: Arial-Black;
  }
  
  body {
    font-size: 12px;
    font-weight: bold;
    font-family: Calibri;
  }
  
  &lt;/style&gt;
  </code></pre>