Is there any documentation, a snippet, or anything that helps replicate the LEX Sidebar styling and functionality using the Lightning Design System? That includes dimensions, colors, collapse/expand functionality and toggle hover tooltips. Only some of these items are documented here.
I spent maybe a couple of days trying to replicate the same look and feel as well as the behavior, and I think it's a bit of an overkill having to do such hacks.
The use case is showing a Visualforce page via popup from a lightning component. It'd be nice to keep it consistent and the sidebar functionality fits in perfectly as I have a bunch of different items that I'd like to display on the side for the user to be able to navigate between.