Hand-drawn architectural illustration, designer's sketchbook, rough pencil lines, subtle shading, warm beige paper texture, A4 size, 3/4 composition, soft natural lighting, casual sitting posture, male designer in his mid-30s with short brown hair and black-framed glasses, wearing a light blue shirt and dark jeans, leaning forward slightly, focused expression, architectural model on the desk, blueprint papers scattered around, coffee cup nearby, modern minimalist office interior, wooden desk with metal legs, ergonomic chair, floor-to-ceiling windows with cityscape view.