Re: why there is no "standard" functions that you can [use] to theme various snippets of HTML/CSS. -> There shouldn't really be a "theme" in HTML. Yes, you have classes and stuff, but the html should be _markup_ in that describes data, not worrying about presentation. Different themes should be achieved via CSS, which is the standard theming abilities you're looking for. Honestly, I can understand the confusion, since it's difficult to parse through all the technologies and understand what is going on at the heart of the matter.