Motion edit prompt

Start with the static SVG unchanged. Animate the folder assembly with a gentle vertical bob, moving upward first and then returning downward in a three-pulse cycle. With each of the three bobs, deform the front pocket so its upper lip moves downward and slightly inward as the folder moves up as if opening, then moves back upward to its shape in the provided SVG as the folder moves down. Keep the visible paper already in the folder aligned behind the front pocket. Reveal three identical document sheets starting hidden above the visible area; send them one after another straight downward along the center of the folder with no rotation or scaling. Each sheet should pass in front of the rear folder but behind the front pocket, so its lower part becomes hidden as it enters, then settle exactly into the same slot as the existing paper before the next sheet begins its descent. Time each sheet descent to one complete folder bob: the first sheet starts descending as the first upward bob begins and the lip moves downward, then lands as the folder returns down and the lip closes; the second and third sheets follow the same pattern on the second and third bobs. End with the final sheet stacked in place and the folder returned to its starting pose.