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curriculum/challenges/english/blocks/learn-responsive-web-design-by-building-a-piano/612e96fc87fe8e44f69f7ec5.md

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--description--

Time to style the keys. Below the #piano rule, target the .keys element with a class selector. Give the new rule a background-color property of #040404, a width property of 949px and a height property of 180px.

--hints--

You should have a .keys selector.

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

Your .keys selector should have a background-color property set to #040404.

js
assert(new __helpers.CSSHelp(document).getStyle('.keys')?.backgroundColor === 'rgb(4, 4, 4)');

Your .keys selector should have the width property set to 949px.

js
assert(new __helpers.CSSHelp(document).getStyle('.keys')?.width === '949px');

Your .keys selector should have a height property set to 180px.

js
assert(new __helpers.CSSHelp(document).getStyle('.keys')?.height === '180px');

--seed--

--seed-contents--

html
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title>Piano</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link rel="stylesheet" href="./styles.css">
  </head>
  <body>
    <div id="piano">
      <div class="keys">
        <div class="key"></div>
        <div class="key black--key"></div>
        <div class="key black--key"></div>
        <div class="key"></div>
        <div class="key black--key"></div>
        <div class="key black--key"></div>
        <div class="key black--key"></div>

        <div class="key"></div>
        <div class="key black--key"></div>
        <div class="key black--key"></div>
        <div class="key"></div>
        <div class="key black--key"></div>
        <div class="key black--key"></div>
        <div class="key black--key"></div>

        <div class="key"></div>
        <div class="key black--key"></div>
        <div class="key black--key"></div>
        <div class="key"></div>
        <div class="key black--key"></div>
        <div class="key black--key"></div>
        <div class="key black--key"></div>
      </div>
    </div>
  </body>
</html>
css
html {
  box-sizing: border-box;
}

*, *::before, *::after {
  box-sizing: inherit;
}

#piano {
  background-color: #00471b;
  width: 992px;
  height: 290px;
  margin: 80px auto;
}

--fcc-editable-region--

--fcc-editable-region--