Spooky White Line-Art T-Shirt Design

Create a centered t-shirt design in clean white line-art style on a transparent background, featuring spooky doodle-style elements like haunted paw prints, ghost bones, cobwebbed leashes, skeleton tennis balls, and pumpkin mugs. Add bats and swirls for motion. At the top, curved hand-lettered text reads: “Built to Walk” and at the bottom: “Fueled by Pumpkins.” All elements must be clean white line-art only with no fill, optimized for printing on dark shirts, with a fully transparent background.