I have button…which is inside a container…which is inside a section.
Everything looks great until I switch to tablet or mobile mode…then the button bleeds off the edge of the screen.
You have 3d transforms set on your hexpander CTA that is causing the container to be larger than the viewing area. Remove the 3d transforms on mobile and you should be able to place your CTA button using the right-margin setting. You’ll lose the interaction, but there is no hover on touch devices anyway, so you won’t notice in actual use.