Opulent Art Nouveau building, sinuous organic lines, flowing curves, whimsical botanical patterns, luxurious materials, jewel-toned colors, emerald green, sapphire blue, amethyst purple, golden accents, intricate metalwork, stained glass windows, ornate details, soft warm lighting, romantic ambiance, nostalgic atmosphere, vintage elegance, 3/4 composition, shallow depth of field, panoramic view, realistic textures.