CSS: Why background-color breaks/removes the box-shadow?

Question

I have a pretty simple div structure - tree boxes with middle box highlighted with box-shadow:

Answer 1

adding .obHiLight{opacity:0.999} creates a new stacking context for that element, which makes it appear above the others as well. This might work for tables too (didn't test :) . @ItJustWerks @brian-tacker