关于这个设计

A flat cartoon chest print: one cute stylized cat avatar (smug little smile, one golden eye open, the other closed — flat illustration, NOT photorealistic) with deep-purple bat wings folded around it, hanging upside-down from a charcoal tree branch that runs across the top of the print; a tiny crescent moon hangs in the corner. Beneath the hanging cat in bold charcoal capitals: "NOCTURNAL SUPERVISOR". Under that in deep-purple script: "Coco". Palette: deep purple, charcoal, golden yellow and midnight blue — dark saturated art with strong contrast on the sport-grey tee. Text, each spelled correctly and appearing exactly once: "NOCTURNAL SUPERVISOR", "Coco". Style: cute flat-vector cartoon, bold outlines, deadpan funny.