Use the parts of normalize.css or sanitize.css you need from your browserslist
Use double-position gradients in CSS
Convert values with PostCSS (e.g. ms -> s)
PostCSS plugin to fallback initial keyword.
PostCSS helpers to throw or output GNU style messages
PostCSS syntax for parsing HTML (and HTML-like)
Use number values in aspect-ratio media queries.
Use logical values in the resize property
Optimise inline SVG with PostCSS.
Use vb and vi length units in CSS
The Reference Element Pseudo-class: :scope
Use logical overscroll behavior properties and values in CSS
A CSS Modules transform to extract local aliases for inline imports
PostCSS gulp plugin
Use logical overflow properties and values in CSS
Determine selector specificity with postcss-selector-parser
PostCSS plugin for fallback image-set
Parse CSS and add vendor prefixes to CSS rules using values from the Can I Use website
Log PostCSS messages in the console
Merge CSS rules with PostCSS.
PostCSS plugin to transform rgba() to hexadecimal
Generate fallback values for content with alt text
Advanced optimisations for cssnano; may or may not break your CSS!
Gamut map css colors to fit display specific gamuts