Create a stunning digital artwork titled "Timeless Elegance: Art Nouveau Poster," reflecting the elegance and sophistication of the Art Nouveau movement. The background should consist of an abstract floral design characterized by flowing organic lines and intricate patterns, all rendered in a monochrome color scheme of black, white, and gray. The floral elements should create a sense of rhythm and movement, enhancing the overall aesthetic. In the foreground, feature vintage fashion accessories, such as a decorative hat with floral embellishments, a vintage necklace, and a stylish pair of shoes, each rendered with exquisite detail to showcase their craftsmanship. The typography should be elegantly styled, with curves and flourishes that complement the floral background, using a serif or script font that embodies the Art Nouveau style. Soft, diffused lighting should illuminate the poster, enhancing the monochrome shades and adding depth to the design. This vintage poster should evoke a sense of timeless elegance, celebrating the beauty of Art Nouveau.