mindbet

I would like to accomplish the following: --a fixed nav header at the top (black strip) --as soon as you scroll, the red div just below the header expands in height and becomes pinned. --divs below the first (like the blue div) are not pinned For the red div, the x:50 move works (it's just a test), but the height expansion does not work. For blue div, the height expansion does work. Codepen included. TIA