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curriculum/challenges/english/blocks/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98d2.md

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--description--

Nest a div with a class of bb1 in the background buildings container. Open your styles.css file, and give .bb1 a width of 10% and height of 70%. "bb" stands for "background building", this will be your first building.

--hints--

You should create a new div element.

js
assert.equal(document.querySelectorAll('div').length, 2);

You should give the new div a class of bb1.

js
assert.exists(document.querySelector('div.bb1'));

You should use a .bb1 class selector to style the element.

js
assert.exists(new __helpers.CSSHelp(document).getStyle('.bb1'));

You should give the .bb1 element a width of 10%.

js
assert.equal(new __helpers.CSSHelp(document).getStyle('.bb1')?.width, '10%');

You should give the .bb1 element a height of 70%.

js
assert.equal(new __helpers.CSSHelp(document).getStyle('.bb1')?.height, '70%');

--seed--

--seed-contents--

html
<!DOCTYPE html>
<html lang="en">    
  <head>
    <meta charset="UTF-8">
    <title>City Skyline</title>
    <link href="styles.css" rel="stylesheet" />
  </head>

  <body>
--fcc-editable-region--
    <div class="background-buildings"></div>
--fcc-editable-region--
  </body>
</html>
css
* {
  border: 1px solid black;
  box-sizing: border-box;
}

body {
  height: 100vh;
  margin: 0;
  overflow: hidden;
}

.background-buildings {
  width: 100%;
  height: 100%;
}