A lock that’s a living calculator, every gear tooth a sentence in a code—each micro‑adjustment a comma that must fall into place or the whole thing sighs in defeat. I’d design a series of nested cams, each one shifting by a fraction of a millimeter, with a feedback loop that reads the torque. If one misaligns even slightly, the sensor trips and the lock stays shut, but I’d sprinkle in a small random jiggle—like a roulette wheel for the final click—to keep the mystery alive. The system would feel alive, like a patient, temperamental creature that only greets me when I’ve coaxed it into perfect alignment.