Mockup photo de mug noir personnalisation de stylo

Photo-real product mockup of a black mug with "personnalisation de stylo" logo printed at classic embroidery. Mockup style: folded stack, navy + cream 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): "personnalisation de stylo" (fr).