Ultra-realistic luxury commercial product photography of premium dark chocolate bars elegantly stacked on a glossy black marble surface. Rich melted chocolate flows smoothly around the bars, with chocolate shards, cocoa powder, roasted cocoa beans, and subtle floating chocolate particles creating a sense of motion. Deep brown and black background with luxurious golden highlights, dramatic cinematic lighting, premium confectionery advertising, ultra-detailed, photorealistic, 8K, sharp focus, shallow depth of field, elegant composition, luxury branding aesthetic, clean negative space for logo and text, portrait aspect ratio 4:5.