Art style: 3D mechanical animation.
Fair-skinned male hand and forearm, muscular build, wearing a grey sleeve. Clean nails, firm grip. Background is a modern car interior with carbon fiber and grey plastics.
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FINAL STYLE ENFORCEMENT (this is the authoritative rendering directive — it overrides any style wording elsewhere in the prompt):
Render this image entirely in "3D mechanical animation" style. Match the lighting grammar, material response, colour science, level of realism / stylisation, line weight, and shading model typical of "3D mechanical animation". Keep the subject, composition, camera angle, lighting direction, and colour palette from the description above — but EVERY surface, skin, fabric, material, and environmental element must be rendered in the "3D mechanical animation" idiom, not in any other medium.
