So, I’m trying to work something out. I’m trying to make it so my sidebar’s height is 100%, in that it extends all the way to bottom of the page. Now, I’ve set html and body to height: 100%; so you’d think it would work, but it doesn’t.
Just keep in mind that using position: absolute; is an awkward hack that removes the sidebar from the natural flow of the document. You might notice this if the sidebar is ever taller than the content; the layout won’t adjust to accommodate, instead chopping of the sidebar where the content finishes.