freeCodeCamp/curriculum/challenges/english/01-responsive-web-design/css-variables-skyline/part-007.md

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---
id: 5d822fd413a79914d39e98cf
title: Part 7
challengeType: 0
---
## Description
<section id='description'>
You can see the body, it's the horizontal line on your page; the box around it is the html element. Make your body fill the whole viewport by giving it a `height` of `100vh`. Remove the default margin from the body by setting the `margin` to `0`. Finally, set the `overflow` property to `hidden` to hide any scroll bars that appear when something extends past the viewport.
</section>
## Instructions
<section id='instructions'>
</section>
## Tests
<section id='tests'>
```yml
tests:
- text: test-text
testString: const body = code.match(/body\s*{[\s\S]+?[^}]}/g)[0]; assert(/height\s*:\s*100vh\s*(;|})/g.test(body) && /margin\s*:\s*(0|0px)\s*(;|})/g.test(body) && /overflow\s*:\s*hidden\s*(;|})/g.test(body));
```
</section>
## Challenge Seed
<section id='challengeSeed'>
<div id='html-seed'>
```html
<!DOCTYPE html>
<html>
<head>
<title>freeCodeCamp Skyline Project</title>
<style>
* {
border: 1px solid black;
box-sizing: border-box;
}
</style>
</head>
<body>
</body>
</html>
```
</div>
</section>
## Solution
<section id='solution'>
```html
<!DOCTYPE html>
<html>
<head>
<title>freeCodeCamp Skyline Project</title>
<style>
* {
border: 1px solid black;
box-sizing: border-box;
}
body {
height: 100vh;
margin: 0;
overflow: hidden;
}
</style>
</head>
<body>
</body>
</html>
```
</section>