Design a vibrant female fashion model wearing a flowing, off-the-shoulder, pastel yellow sundress adorned with delicate floral patterns. She has a slender build and stands confidently, with a bright smile that exudes warmth and approachability. The model's sun-kissed skin and wavy, chestnut hair fall gracefully over her shoulders, illuminated by soft, natural lighting from a large window to her left. The background is a solid, light coral color, creating a striking contrast with her dress. Utilize a Canon EOS R5 camera set at f/2.8 for a shallow depth of field, ISO 100, and a shutter speed of 1/125s to capture sharp details. Apply subtle Photoshop effects to enhance the dress's textures and colors while maintaining a realistic appearance.