Using the uploaded product photo, generate a high-resolution mockup with these exact specifications: [COMPOSITION]: The product resting on a dark, grained leather surface (like a high-end briefcase or desk). [LIGHTING]: Warm, amber-toned spotlight from the front-right, highlighting the texture of the leather and the product. [BACKGROUND]: A solid, dark brown matte background (#3D2B1F). [SHADOW]: Short, soft shadows that emphasize the leather's grain. [PRODUCT INTEGRITY]: STRICTLY PRESERVE the product's original surface. DO NOT add any new text, logos, or branding. [MOOD]: Classic luxury, masculine, premium executive.