Recommended CSS Compiler for Solid

hey y'all. It's been a minute since I've worked with SASS or LESS, and I'm wondering if there are any new compilers that have come up in recent years that do a great job of supporting nested classes. I have a project where the goal is to compile custom CSS and ensure it works well with Solid hot reload. Are SASS and LESS still relevant, and are there any gotchas when implementing them in solid?