As someone who is perpetually terrified to do a Show HN, congrats for shipping something. I also don&#x27;t think this idea is much better than inline style attributes, but it&#x27;s something different at least. You seem to take constructive criticism well and that&#x27;s a good sign. My advice (worth nothing since I haven&#x27;t shipped) is to learn from the feedback and come back with something else.<p>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&#x27;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 &quot;position&quot; properties, so &quot;position: static&quot; wouldn&#x27;t be allowed. Later I was able to use phloc to parse the inline styles but prohibit &quot;position&quot;, so I didn&#x27;t need a huge set of CSS classes anymore.