---
components: CssBaseline, ScopedCssBaseline
---
# CSS Baseline
Material-UI provides a CssBaseline component to kickstart an elegant, consistent, and simple baseline to build upon.
## Global reset
You might be familiar with [normalize.css](https://github.com/necolas/normalize.css), a collection of HTML element and attribute style-normalizations.
```jsx
import React from 'react';
import CssBaseline from '@material-ui/core/CssBaseline';
export default function MyApp() {
return (
{/* The rest of your application */}
);
}
```
## Scoping on children
However, you might be progressively migrating a website to Material-UI, using a global reset might not be an option.
It's possible to apply the baseline only to the children by using the `ScopedCssBaseline` component.
```jsx
import React from 'react';
import ScopedCssBaseline from '@material-ui/core/ScopedCssBaseline';
import MyApp from './MyApp';
export default function MyApp() {
return (
{/* The rest of your application */}
);
}
```
⚠️ Make sure you import `ScopedCssBaseline` first to avoid box-sizing conflicts as in the above example.
## Approach
### Page
The `` and `` elements are updated to provide better page-wide defaults. More specifically:
- The margin in all browsers is removed.
- The default Material Design background color is applied.
It's using [`theme.palette.background.default`](/customization/default-theme/?expand-path=$.palette.background) for standard devices and a white background for print devices.
### Layout
- `box-sizing` is set globally on the `` element to `border-box`.
Every element—including `*::before` and `*::after` are declared to inherit this property,
which ensures that the declared width of the element is never exceeded due to padding or border.
### Typography
- No base font-size is declared on the ``, but 16px is assumed (the browser default).
You can learn more about the implications of changing the `` default font size in [the theme documentation](/customization/typography/#typography-html-font-size) page.
- Set the `theme.typography.body2` style on the `` element.
- Set the font-weight to `theme.typography.fontWeightBold` for the `` and `` elements.
- Custom font-smoothing is enabled for better display of the Roboto font.
## Customization
Head to the [global customization](/customization/globals/#global-css) section of the documentation to change the output of these components.