I find centering more complex because there's not just one type of centering. I think centering can differ based on fixed and fluid width, display type of elem

I find centering more complex because there's not just one type of centering. I think centering can differ based on fixed and fluid width, display type of element (inline, inline-block, block), and probably other factors. I can't think of a clear definition for how a single simple centering would work given all the possible variables at this point.