title: Background-color only on the text field
body: <p>this is my code:</p>
  
  <p><strong>HTML:</strong></p>
  
  <pre><code>&lt;div id="hello"&gt;
  Hello
  &lt;/div&gt;
  </code></pre>
  
  <p><strong>CSS:</strong></p>
  
  <pre><code>#hello {
    font-size:30px;
    background-color:red;
  }
  </code></pre>
  
  <p>As you can see in the fiddle (<a href="https://jsfiddle.net/en27xg3b/" rel="nofollow noreferrer">https://jsfiddle.net/en27xg3b/</a>), the background color is on all the div. I want it to be only where the "Hello" is.</p>
  
  <p>I'm pretty sure it's a simple code, but I forget how to do it. </p>