Capture a candid moment of a teenage girl sitting in a cozy bookstore corner, surrounded by shelves of colorful books. She is holding a book with a soft smile on her face, wearing a pastel-colored sweater and glasses. The setting should have warm, soft lighting with shadows casting from the bookshelves to create an inviting, intimate feel. Use a 50mm lens with a wide aperture (f/1.8) to create a beautiful bokeh effect in the background, blurring the rows of books while keeping her expression in sharp focus. The scene should feel warm and relaxed, perfect for a creative and introspective mood. Apply a gentle vignette effect to draw the viewer’s attention to her face and add subtle color grading to enhance the cozy tones of the setting.