Create a portrait of an elegant woman in an early 20th-century Parisian café

Create a portrait of an elegant woman in an early 20th-century Parisian café, embodying the Belle Époque era. She should be dressed in a sophisticated, flowing dress with intricate lace details, her hair styled in a loose updo adorned with a feathered hat. The background should reflect the art nouveau style with stained glass windows casting colorful light, wrought iron furniture, and lush indoor plants. Capture her in a moment of contemplation, with a slight smile, holding a porcelain cup. The lighting should be soft, mimicking the natural light of a cloudy afternoon, with subtle highlights to emphasize the textures of her attire and the ambiance. Use a technique that blends photorealism with a painterly touch, reminiscent of the works by Toulouse-Lautrec but with modern clarity.