---
id: 6153a3ebb4f7f05b8401b716
title: Step 21
challengeType: 0
dashedName: step-21
---

# --description--

Resize the preview to see the layout change from your media query.

Finally, create another media query for screens smaller than `600px` wide. In that media query, create a `#gallery img` rule and set the `width` property to `100%`. This will give your gallery a single-column layout.

Your CSS Flexbox Photo Gallery is now complete.

# --hints--

You should have a second `@media` query.

```js
assert(new __helpers.CSSHelp(document).getCSSRules('media')?.length === 2);
```

Your new `@media` query should come after your existing one.

```js
assert(new __helpers.CSSHelp(document).getCSSRules('media')?.[0]?.media?.mediaText === '(max-width: 800px)');
```

Your new `@media` query should have a `max-width` of `600px`.

```js
assert(new __helpers.CSSHelp(document).getCSSRules('media')?.[1]?.media?.mediaText === '(max-width: 600px)');
```

Your new `@media` query should have a `#gallery img` selector.

```js
const rules = new __helpers.CSSHelp(document).getRuleListsWithinMedia('(max-width: 600px)');
assert(rules?.find(rule => rule?.selectorText === '#gallery img'));
```

Your `#gallery img` rule should have a `width` property set to `100%`.

```js
const rules = new __helpers.CSSHelp(document).getRuleListsWithinMedia('(max-width: 600px)');
const imgRule = rules?.find(rule => rule?.selectorText === '#gallery img');
assert(imgRule?.style?.width === '100%');
```

# --seed--

## --seed-contents--

```html
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>CSS Flexbox Photo Gallery</title>
    <link rel="stylesheet" href="./styles.css">
  </head>
  <body>
    <div class="header">
      <h1>CSS FLEXBOX PHOTO GALLERY</h1>
    </div>
    <div id="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"/>
      <img src="https://cdn.freecodecamp.org/curriculum/css-photo-gallery/10.jpg"/>
    </div>
  </body>
</html>
```

```css
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial;
  background: #EBE7E7;
}

.header {
  text-align: center;
  padding: 32px;
  background: #E0DDDD;
}

#gallery {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  padding: 0 4px;
}

#gallery img {
  width: 25%;
  height: 300px;
  object-fit: cover;
  margin-top: 8px;
  padding: 0 4px;
  border-radius: 10px;
}

@media (max-width: 800px) {
  #gallery img {
    width: 50%;
  }
}

--fcc-editable-region--

--fcc-editable-region--
```

# --solutions--

```html
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>CSS Flexbox Photo Gallery</title>
    <link rel="stylesheet" href="./styles.css">
  </head>
  <body>
    <div class="header">
      <h1>CSS FLEXBOX PHOTO GALLERY</h1>
    </div>
    <div id="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"/>
      <img src="https://cdn.freecodecamp.org/curriculum/css-photo-gallery/10.jpg"/>
    </div>
  </body>
</html>
```

```css
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial;
  background: #EBE7E7;
}

.header {
  text-align: center;
  padding: 32px;
  background: #E0DDDD;
}

#gallery {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  padding: 0;
}

#gallery img {
  width: 25%;
  height: 300px;
  object-fit: cover;
  margin-top: 8px;
  padding: 0 4px;
  border-radius: 10px;
}

@media (max-width: 800px) {
  #gallery img {
    width: 50%;
  }
}

@media (max-width: 600px) {
  #gallery img {
    width: 100%;
  }
}
```
