Portra 160 Expired Film (Heavily Aged) Filter

Apply an authentic heavily expired Kodak Portra 160 film effect to this photo, simulating film stock that expired 15+ years ago and was stored improperly. Add extreme color shifts: heavy magenta/pink cast in the shadows, green shifts in the midtones, and orange-yellow highlights. Include heavy film grain (much coarser than fresh film), random light leaks bleeding in from the edges in orange and cyan, and areas of uneven exposure where the emulsion has degraded. Some areas should show chemical fogging (milky white patches near the edges). The overall contrast should be significantly reduced with lifted blacks and compressed highlights. Add slight color banding in gradient areas. This should look authentically degraded, not just filtered.