Create a flat, front-facing business card design inspired by mecha-anime aesthetics. Focus on sharp edges, geometric shapes (especially squares), and metallic textures. Use a color palette of whites, greys, dark blues, and blacks. Convey a quiet, deadly, traditional soldier vibe without depicting any characters, robots, mechas, or weapons. The image should be a single, flat, 2D design with no perspective, no shadows, no stacks, no background elements, and no additional objects--just the business card design itself on a plain background. --ar 2:1 --no stacks, perspective, shadows, background, objects