School yearbook AI, nostalgic atmosphere, retro color tone, smiling students, casual clothing, jeans, sneakers, backpacks, group photo, diverse facial expressions, bright eyes, natural makeup, messy hair, relaxed posture, sitting on stairs, leaning against lockers, holding laptops, chatting, laughing, school uniforms, blazers, ties, skirts, classic composition, soft focus, warm lighting, shallow depth of field.