Ensure values are ordered consistently in your CSS.
Keep only the CSS you need based on comments and your browserslist
PostCSS plugin to fallback initial keyword.
Use oklab() and oklch() color functions in CSS
Use flow-relative (inline-start and inline-end) values for float and clear
Use the range notation in CSS media queries
Use double-position gradients in CSS
Use the color-mix function in CSS
Use the parts of normalize.css or sanitize.css you need from your browserslist
The Reference Element Pseudo-class: :scope
Use the relative color syntax in CSS
Use logical values in the resize property
Use pow(), sqrt(), hypot(), log(), exp() exponential functions in CSS
PostCSS syntax for parsing HTML (and HTML-like)
Convert values with PostCSS (e.g. ms -> s)
Indent-based CSS syntax for PostCSS
Use number values in aspect-ratio media queries.
Optimise inline SVG with PostCSS.
Use vb and vi length units in CSS
A CSS Modules transform to extract local aliases for inline imports
Use logical overscroll behavior properties and values in CSS
Use logical overflow properties and values in CSS
PostCSS plugin to keep rules and at-rules content in order.
CLI for PostCSS