Universal

A CSS reset that strips away almost all of the default browser styles so you can just set the values you want.

Features

Unset browser defaults

The default styles are removed by a all: unset declaration applied to all elements except the following:

• HTML head element
• HTML metadata content elements
• HTML embedded content elements
• SVG elements
• MathML elements

Use box-sizing

All HTML elements are given a box-sizing: border-box declaration except the head element and metadata content elements.

All ::before and ::after pseudo-elements are given a box-sizing: inherit declaration.

Retain block elements

Following elements are given a display: block declaration:

• address
• article
• aside
• audio
• blockquote
• body
• canvas
• dd
• details
• dialog
• div
• dl
• dt
• fieldset
• figcaption
• figure
• footer
• form
• h1
• h2
• h3
• h4
• h5
• h6
• header
• hgroup
• hr
• iframe
• img
• li
• main
• math
• nav
• object
• ol
• p
• pre
• section
• svg
• ul
• video

Retain tables layout

The display properties for table elements are reset back to their normal values:

• table (display: table)
• thead (display: table-header-group)
• tbody (display: table-row-group)
• tfoot (display: table-footer-group)
• tr (display: table-row)
• th (display: table-cell)
• td (display: table-cell)

Additionally, the border-collapse property is set to collapse for table elements.

Sensible defaults for embedded content

All embedded content elements are given border: none and max-width: 100% declarations:

• audio
• canvas
• iframe
• img
• math
• object
• svg
• video

Accessibility

Because this reset removes all default browser styles, important defaults for accessibility are removed. If you use this reset, you should add your own styles to ensure your content accessible:

1. Links should have an underline or similar indicator identify them.
2. Elements should be highlighted when focused.