Merging the diagonal split & transparency checkerboard with the depth and separation of two offset lifting layers. Compare the 3 refined variations below across all icon sizes (96px, 48px, 24px, 16px) and in simulated navbar context.
The foreground solid square peels/lifts diagonally away with a negative-space cutout gap, revealing the background square rendered as a crisp transparency checkerboard.
The front card itself features the diagonal split (solid top-left + checkerboard bottom-right), lifted away from an offset solid backdrop shadow.
Calibrated with a bold 3×3 transparency grid on the base layer. Optimizes pixel-perfect contrast so the checkerboard never blurs, even on standard definition 16px displays.
Here is how Concept A looks inside the actual navigation bar of Remove Bground at standard 1:1 scale: