Art Nouveau building, flowing organic lines, sinuous curves, ornate metalwork, stained glass windows, intricate mosaics, warm earthy tones, rich jewel tones, emerald green, sapphire blue, amethyst purple, golden yellow, soft peach hues, creamy whites, lush botanical motifs, floral patterns, whimsical illustrations, romantic ambiance, dreamy lighting, soft focus, 1/2 composition, intimate atmosphere.