Mockup photo réaliste de hoodie porte documents publicitaires

Photo-real product mockup of a heather gray hoodie with "porte documents publicitaires" logo printed at full back. Mockup style: minimalist white background, sage + ivory logo palette. Studio-grade photography, sharp focus, natural fabric texture / mug ceramic / paper grain. Magazine-quality merch shot, no watermarks. Logo is generic placeholder typography — no real-brand marks. Realistic product proportions. Target search intent (rendered visually, no on-image text): "porte documents publicitaires" (fr).