if youre running an A/B test on a primary call-to-action, sometimes the mobile view makes it look too small compared to the surrounding elements. you can use a subtle
box-shadow
to create a sense of depth without changing the actual layout or adding heavy images.
text-shadow: 0px 2px 4px rgba(0, 0, 0, 0.3);
this helps the button pop
out of the flat design. its an easy way to test if increased visual weight impacts clicks on mobile devices.
just don't overdo it or you'll ruin the clean aesthetic. ⚡