PunsOfAnarchy said: I'd love to be able to reuse some of Roll20's CSS in my API scripts and character sheets (the grid system would be an amazing help for char sheets), but all classes in sheets and API scripts get prefixed with "sheet-" or "userscript-", respectively. Could we get access to a subset of CSS so we don't have to reinvent the wheel for every new addon? A subset of the site's CSS can be used with API script output in chat. A while ago, the "userscript-" prefix was only added to the first class in the class attribute, so things like Hony Badger's PowerCards would do things like class="a inlinerollresult showtip tipsy-n fullcrit" , which got translated to class="userscript-a inlinerollresult showtip tipsy-n fullcrit" . That error of omission has been rectified, adding "userscript-" to all classes present, but at the same time those particular userscript-X classes copy their X class counterparts. The main difference with the userscript-tooltip classes is that it adds the text "API or player-generated content" to the edge of the tooltip, so that an API script can't fool a player into thinking that it's a genuine inline roll from the dice engine. I'm not certain of the full extent of the userscript-* class copies, but they do exist.