Luxurious penthouse, Art Nouveau style, ornate metalwork, flowing organic lines, sinuous curves, grand staircase, intricate mosaics, stained glass windows, lavish furnishings, velvet drapes, marble floors, gilded accents, crystal chandeliers, panoramic city views, rooftop garden, lush greenery, vibrant flowers, soft warm lighting, shallow depth of field, 1/1 composition, realistic textures, ambient occlusion.