--- id: 612e96fc87fe8e44f69f7ec5 title: Step 13 challengeType: 0 dashedName: step-13 --- # --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 Piano
``` ```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-- ```