Fluid Ycode with custom CSS
Ycode's per-class custom CSS field accepts raw CSS. Load EVA's compiled variables once, then reference var(--XX) wherever you'd normally type a pixel value.
What you need
A compiled stylesheet
$build-class: false
Fluid var(--XX) and OKLCH color variables only — Ycode's own class system stays untouched.
Somewhere to host it
CDN / repo
Custom Code accepts a stylesheet link or an inline