Opulent Art Nouveau interior, lavish furnishings, sinuous lines, flowing curves, organic forms, jewel-toned colors, emerald green, sapphire blue, amethyst purple, golden accents, ornate metalwork, stained glass windows, intricate mosaics, velvet drapes, luxurious fabrics, soft warm lighting, dramatic shadows, 3/4 composition, intimate atmosphere, rich textures, subtle gradations.