Learn CSS Flexbox by Building a Photo Gallery - Step 4

Tell us what’s happening:
Describe your issue in detail here.
i have done everything correct; what am im missing here

  **Your code so far**
/* file: index.html */
<!DOCTYPE html>
<html>
<head lang="en">
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Photo Gallery</title>
  <link href ="./styles.css">
</head>
<body>
<div class="header">
<h1>css flexbox photo gallery</h1>
</div>
</body>
</html>
/* file: styles.css */

  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.81 Safari/537.36

Challenge: Learn CSS Flexbox by Building a Photo Gallery - Step 4

Link to the challenge:

The exercise wants you to add a header element, not a div element.
A header element looks like this:

<header>
</header>

Then you should add the h1 as you did before.