Transform [user-provided birthday portrait] into an exquisite commemorative cover-style …

Transform [user-provided birthday portrait] into an exquisite commemorative cover-style visual, preserving the subject's authentic appearance, age, temperament, hairstyle, key clothing features, and natural expression. The subject is seated in or leaning against a 3D wall niche formed by a giant age number. The age number serves as the primary visual anchor, resembling a thick, sculptural space carved out of a clean, light-colored wall, featuring clear depth, soft shadows, and delicate plaster texture. The subject's body makes realistic contact with the edges of the number, with parts of their hands, feet, or clothing slightly extending beyond the niche, making the number both a background and a seat/stage. The interior of the number is filled with celebratory items derived from the birthday theme, maintaining a full yet uncluttered rhythm; rounded balloons provide volume and a sense of whimsy, while floral elements or thematic decorations provide detail density and a sense of ritual. The fillers cluster and disperse along the curves of the number, leaving sufficient negative space on the wall. Colors are extracted from the subject's photo, the birthday theme, the season, and the celebratory mood, mapped into large areas of bright, clean base colors, clear thematic primary colors, a small amount of deeper structural colors, and small areas of highlight accent colors. The overall aesthetic remains high-key, clear, soft, and vibrant, avoiding muddy tones, vintage yellowing, or dull filters. The lighting resembles warm, natural daylight entering from the front-side, rendering the subject's skin realistic and bright, with subtle shadows cast by the inner walls of the number and the decorations, giving the image an airy, tactile, and three-dimensional quality. Text appears as a quiet, restrained information layer, using large, elegant, high-contrast serif typography for [Name], accompanied by widely-spaced small capital letters for "Chapter", [Age Number], and a short birthday wish. The text maintains a clear hierarchy with the main subject, avoiding obstruction of the face or core posture. The overall composition resembles a high-end commemorative cover customized for the birthday. Theme: [Subject] [Age] years old Aspect ratio 9:10