As someone who is perpetually terrified to do a Show HN, congrats for shipping something. I also don't think this idea is much better than inline style attribut

As someone who is perpetually terrified to do a Show HN, congrats for shipping something. I also don't think this idea is much better than inline style attributes, but it's something different at least. You seem to take constructive criticism well and that's a good sign. My advice (worth nothing since I haven't shipped) is to learn from the feedback and come back with something else. Also, I should mention I did have a use for something like this. On my site, I sanitize HTML generated by user plugins, and to ensure the HTML doesn't mess up other parts of the page, I would provide a set of allowed CSS classes, but disallow inline styles. The CSS classes would not include "position" properties, so "position: static" wouldn't be allowed. Later I was able to use phloc to parse the inline styles but prohibit "position", so I didn't need a huge set of CSS classes anymore.