Learn CSS Flexbox by Building a Photo Gallery - Step 4

Tell us what’s happening:
Describe your issue in detail here.

Your code so far

<!-- file: index.html -->

<!-- User Editable Region -->

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Photo Gallery</title>
  <link rel="stylesheet" href="./styles.css">
</head>
<body>
  <div class="header">
    <h1>CSS FLEXBOX PHOTO GALLERY</h1>
  </div>

  </body>
</html>

<!-- User Editable Region -->

/* 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/114.0.0.0 Safari/537.36

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

Link to the challenge:

“Add a header element within the body element”

<div class="header">
    <h1>CSS FLEXBOX PHOTO GALLERY</h1>
</div>

This is a div element.