Learn CSS Flexbox by Building a Photo Gallery - Step 1

Even though my code is correct, it doesn’t pass. Can someone please let me know why?

  **Your code so far**
/* file: index.html */
<!DOCTYPE html>
<html>
<head>

</head>
<body>
</body>
</html>
/* file: styles.css */

  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Firefox/102.0

Challenge: Learn CSS Flexbox by Building a Photo Gallery - Step 1

Link to the challenge:

Your code passes on my machine, try resetting the challenge and trying again. If that fails consider using chrome browser if your not already using it.