Professional stock photography style image of a human arm and hand reaching in from the top-left corner of the frame, angled downward toward the lower-right. The arm is wearing a crisp dark navy blue suit sleeve, showing from roughly the elbow down. The hand is holding a single jigsaw puzzle piece between the thumb and fingers, gripping it gently from the top edge. The puzzle piece is a natural cardboard or light wood tone, plain and unmarked, shown at a slight three-quarter angle so its shape is clearly visible with the classic interlocking tabs and blanks. Realistic lighting with soft shadows on the hand and puzzle piece, photographic quality, sharp focus, clean edges. Transparent background. PNG with alpha channel. No background colour. No backdrop. No scene. No floor, no wall, no surface. The arm, hand, and puzzle piece should be the only elements in the image, isolated cleanly against full transparency. Cutout style, as if the subject has been extracted from its original background. Do not include any coloured background, gradient, or checkerboard pattern. Empty transparent space around the subject. Composition: arm enters from the top-left edge of the frame, diagonal line of the forearm running toward the lower-right, hand and puzzle piece positioned in the centre-right of the frame. Vertical portrait aspect ratio.