title: Apply CSS to Typography Material UI
body: <p>Im trying to apply css to a Typography element but it does nothing; I have tried the same css on another div element and it works but it simply does not apply to Typography.
  This is my Typography element:</p>
  
  <pre><code>&lt;Typography
    variant="title"
    classname={classes.detailTitle}
  &gt;
     Details:
  &lt;/Typography&gt;
  </code></pre>
  
  <p>And this is my css:</p>
  
  <pre><code>detailTitle: {
          textDecoration: 'underline'
      }
  </code></pre>
  
  <p>Any clues?</p>