What exactly is it that I’m missing here?
**Your code so far**
/* file: index.html */
<!DOCTYPE html>
<html lang="en">
<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>
<header class="header">
<h1>css flexbox photo gallery</h1>
</header>
<div class="gallery">
<img src="https://cdn.freecodecamp.org/curriculum/css-photo-gallery/1.jpg">
<img src="https://cdn.freecodecamp.org/curriculum/css-photo-gallery/2.jpg">
<img src="https://cdn.freecodecamp.org/curriculum/css-photo-gallery/3.jpg">
<img src="https://cdn.freecodecamp.org/curriculum/css-photo-gallery/4.jpg">
<img src="https://cdn.freecodecamp.org/curriculum/css-photo-gallery/5.jpg">
<img src="https://cdn.freecodecamp.org/curriculum/css-photo-gallery/6.jpg">
<img src="https://cdn.freecodecamp.org/curriculum/css-photo-gallery/7.jpg">
<img src="https://cdn.freecodecamp.org/curriculum/css-photo-gallery/8.jpg">
<img src="https://cdn.freecodecamp.org/curriculum/css-photo-gallery/9.jpg">
</div>
</body>
</html>
/* file: styles.css */
.gallery {
box-sizing: border-box;
}
**Your browser information:**
User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:104.0) Gecko/20100101 Firefox/104.0
Challenge: Learn CSS Flexbox by Building a Photo Gallery - Step 7
Link to the challenge: