2022-06-06 14:55:35 +00:00
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---
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id: 612e95ef2e4bdf41f69067f9
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title: Step 12
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challengeType: 0
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dashedName: step-12
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---
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# --description--
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Imposta la proprietà `margin` dell'elemento `#piano` su `80px auto`.
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# --hints--
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Il selettore `#piano` dovrebbe avere una proprietà `margin` impostata su `80px auto`.
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```js
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assert(new __helpers.CSSHelp(document).getStyle('#piano')?.margin === '80px auto');
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```
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# --seed--
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## --seed-contents--
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```html
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<!DOCTYPE html>
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2022-06-30 15:24:09 +00:00
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<html lang="en">
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2022-06-06 14:55:35 +00:00
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<head>
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<meta charset="UTF-8" />
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<title>Piano</title>
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<link rel="stylesheet" href="./styles.css">
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</head>
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<body>
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<div id="piano">
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<div class="keys">
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<div class="key"></div>
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<div class="key black--key"></div>
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<div class="key black--key"></div>
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<div class="key"></div>
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<div class="key black--key"></div>
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<div class="key black--key"></div>
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<div class="key black--key"></div>
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<div class="key"></div>
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<div class="key black--key"></div>
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<div class="key black--key"></div>
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<div class="key"></div>
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<div class="key black--key"></div>
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<div class="key black--key"></div>
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<div class="key black--key"></div>
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<div class="key"></div>
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<div class="key black--key"></div>
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<div class="key black--key"></div>
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<div class="key"></div>
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<div class="key black--key"></div>
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<div class="key black--key"></div>
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<div class="key black--key"></div>
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</div>
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</div>
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</body>
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</html>
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```
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```css
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html {
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box-sizing: border-box;
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}
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*, *::before, *::after {
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box-sizing: inherit;
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}
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--fcc-editable-region--
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#piano {
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background-color: #00471b;
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width: 992px;
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height: 290px;
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}
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--fcc-editable-region--
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```
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