First step is for people to understand stacking contexts (https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Understanding_z_index/The_stacking_context http

First step is for people to understand stacking contexts (https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Understanding_z_index/The_stacking_context https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Under...). Blew my mind after years of web development to learn that I had really had no idea how z-index worked.