Create an image for use as a business card inspired by mecha-anime aesthetics. Focus on sharp edges, squares, and metallic textures with whites, greys, dark blues, and blacks. Convey a quiet, deadly, traditional soldier vibe without depicting any characters, robots, mechas, or weapons. The design should be a single, flat, 2D image with no perspective, shadows, stacks, background elements, or additional objects--just the business card itself on a plain background. --no stacks, perspective, shadows, backgrounds, hands, additional objects, characters, robots, mechas, weapons --ar 2:1