Hi @sravner
Thanks for taking the time to report your issue and for posting the link to your dev page!
I know, it looks like the button is somewhere outside the popup. But when you look closer, you can see, that the button is inside the popup, but you have given the popup a transparent background + there are two empty columns left and right of the actual popup contents.
A solution for this problem would be, to change the row to a 1-column row (and not column layout 1 / 3 / 1). Then you set the width of the popup-SECTION to 60% and set the alignment to center. Also, I would add a solid background color to the section itself, so users can see where the popup ends.
Besides this, I notice that you have 3 popup sections, all with the same ID (“more”). That will not work correctly, as the popup-link will always open the first popup, never the second or third one. You should give all popups a unique ID, e.g. “more-1”, “more-2” and “more-3” (and adjust the links accordingly to point to “#more-1” instead of “#more” etc.)
I hope this helps. Otherwise, let me know where you are stuck.
Philipp