Create an ultra-premium dessert advertising poster for a fictional café "VELOURS CHOCO". FORMAT: 4:5 vertical, rich luxurious layout. SUBJECT: a silky chocolate mousse with a thin crispy cocoa tuile, scattered cocoa nibs and edible flowers, a soft cloud of whipped cocoa foam. BACKGROUND: deep chocolate-brown-to-cream gradient with warm glow. LIGHTING: soft diffused light, glossy highlights. TYPOGRAPHY: elegant serif logo "VELOURS CHOCO" top-center, tiny tagline "Velvety indulgence" bottom. FINISH: 8k, hyper-realistic food photography, decadent finish.