---
id: 612e89d254fe5d3df7d6693d
title: Step 10
challengeType: 0
dashedName: step-10
---
# --description--
Now that you have reset the `html` box model, you need to pass that on to the elements within as well. To do this, you can set the `box-sizing` property to `inherit`, which will tell the targeted elements to use the same value as the parent element.
You will also need to target the pseudo-elements, which are special keywords that follow a selector. The two pseudo-elements you will be using are the `::before` and `::after` pseudo-elements.
The `::before` selector creates a pseudo-element which is the first child of the selected element, while the `::after` selector creates a pseudo-element which is the last child of the selected element. These pseudo-elements are often used to create cosmetic content, which you will see later in this project.
For now, create a CSS selector to target all elements with `*`, and include the pseudo-elements with `::before` and `::after`. Set the `box-sizing` property to `inherit`.
# --hints--
You should have a `*, ::before, ::after` selector.
```js
assert(new __helpers.CSSHelp(document).getStyle('*, ::before, ::after'));
```
Your `*, ::before, ::after` selector should have the `box-sizing` property set to `inherit`.
```js
assert(new __helpers.CSSHelp(document).getStyle('*, ::before, ::after')?.boxSizing === 'inherit');
```
# --seed--
## --seed-contents--
```html
Piano
```
```css
--fcc-editable-region--
html {
box-sizing: border-box;
}
--fcc-editable-region--
```