Luxurious Art Nouveau interior, flowing organic lines, sinuous curves, ornate metalwork, stained glass windows, rich wood paneling, velvety soft furnishings, jewel-toned color palette, emerald green, sapphire blue, amethyst purple, golden yellow, warm beige, creamy white, subtle gradient effects, intricate patterns, floral motifs, natural textures, ambient soft lighting, warm cozy atmosphere, 1/2 composition, realistic render, detailed ornaments.