I'm looking to change the way the inventory & status bars look (beyond the given presets) and I'm assuming I need to dig into the CSS. What do I need to do to, say, change the border color? More specifically, what are the names of the classes & IDs that I'd be changing the properties of?
The Pixie has created a 3 part guide to explain how all that works:
This might be worth looking at too:
How to add panes on the left side, like "Deeper" adventure?