2022-06-06 14:55:35 +00:00
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---
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id: 612eb7ca8c275d5f89c73333
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title: Step 24
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challengeType: 0
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dashedName: step-24
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---
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# --description--
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Per arrotondare i bordi del pianoforte e dei tasti, assegna al selettore `#piano` un `border-radius` di `10px`.
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# --hints--
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Il selettore `#piano` dovrebbe avere una proprietà `border-radius` impostata a `10px`.
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```js
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assert(new __helpers.CSSHelp(document).getStyle('#piano')?.borderRadius === '10px');
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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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<img class="logo" src="https://cdn.freecodecamp.org/platform/universal/fcc_primary.svg" alt="freeCodeCamp Logo" />
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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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margin: 80px auto;
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padding: 90px 20px 0 20px;
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position: relative;
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}
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--fcc-editable-region--
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.keys {
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background-color: #040404;
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width: 949px;
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height: 180px;
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padding-left: 2px;
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}
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.key {
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background-color: #ffffff;
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position: relative;
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width: 41px;
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height: 175px;
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margin: 2px;
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float: left;
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}
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.key.black--key::after {
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background-color: #1d1e22;
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content: "";
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position: absolute;
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left: -18px;
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width: 32px;
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height: 100px;
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}
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.logo {
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width: 200px;
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position: absolute;
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top: 23px;
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}
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```
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