Elegant Art Nouveau dining hall, rich jewel tones, emerald green walls, sapphire blue ceilings, ruby red accents, golden ornate details, curved sinuous lines, flowing organic shapes, luxurious velvet drapes, polished bronze fixtures, intricate mosaic floors, warm soft lighting, intimate ambiance, classic ornate furniture, lavish decorative mirrors, ornate plasterwork, natural floral patterns, whimsical botanical illustrations.