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I don't fan!
To answer your question, no. I just wanted to find a different approach to the theme to make it a bit more interesting: I knew from elementary Math classes there are relations in sets so I googled for it. Probably ended up making it a tad more difficult, so I added the hint.
Does anyone else use the JD Edwards E1 Timesheet system? I ask as it a constant pain in in the rear end. The user interface appears to Java, programmed by either an intern or someone who was a programmer by reading 'Java For Dummies' or similar. The worst thing was I googled it and found a web site for them? claiming awards, the Dilbert of the Day calendar for today (8-17-16) seems appropriate!
We use deltek, which sucks hairy donkey testicles.
".45 ACP - because shooting twice is just silly" - JSOP, 2010 ----- You can never have too much ammo - unless you're swimming, or on fire. - JSOP, 2010 ----- When you pry the gun from my cold dead hands, be careful - the barrel will be very hot. - JSOP, 2013
But what I'd really like is reference where each element has a description of permitted attributes and styles. I mean, really, if I were writing a rendering engine (which I'm not) where is the gospel of what's permissible as an element's styles and how all these styles behave?
Actually, W3Schools has done a great job of making an interactive UI -- click on one of the style definitions, like "display", and you can see all the options and even how they behave. Still, I don't want to be clicking everywhere. Isn't there an actual document somewhere?
In my insufficient google-fu, I stumbled across something interesting but unrelated:
Start here: HTML 5.2: 3. Semantics, structure, and APIs of HTML documents[^]
The current spec has anchors to elements that an element inherits from so it's easier to search and browse in the page rather than in a search engine. It's not really authoritative though because browser and web developers do whatever they want, and that eventually gets reflected in the spec.
I don't know if there's anything quite as helpful for CSS rules, as far as I understand it there's some basic rules about defaults (block vs inline elements for example), but mostly that's decided by browsers.
CSS is much bigger, but I think you'd start here: CSS Snapshot 2018[^] (Links to all of the pages that I think you actually want)
Once you start down the dark path, forever will it dominate your destiny, consume you it will.