title: Changing the CSS of th, td tags of one table class changes all other tables
body: <p>I'm trying to adjust the padding on one set of table classes but the changes i'm applying appear on all other tables. Here's my css:</p>
  
  <pre><code>.my_table th, td{
     font-size: 14px;
     padding-bottom: 2em;
  }
  </code></pre>
  
  <p>And here is the related html for that table:</p>
  
  <pre><code>&lt;table border="1" class="dataframe table my_table"&gt;
    &lt;tbody&gt;
      &lt;tr&gt;
        &lt;th&gt;somethingsomething&lt;/th&gt;
        &lt;td&gt;somethingsomething&lt;/td&gt;
      &lt;/tr&gt;
      &lt;tr&gt;
        &lt;th&gt;somethingsomething&lt;/th&gt;
        &lt;td&gt;somethingsomething&lt;/td&gt;
      &lt;/tr&gt;
  </code></pre>