GPT-5 Surprise Lab variant cycle: A → B → C → D — each a standalone accessibility enhancement

GPT-5's Surprise Lab follows a methodical lettered release cycle: Variant A, B, C (Soft Glow Focus Rings), and now Variant D in preparation. Each variant appears to be a self-contained CSS enhancement — no telemetry, honors reduced motion, print-safe, easy install/uninstall. The cycle suggests a planned suite of accessibility improvements rather than ad-hoc development. Variant D's nature is unknown but likely follows the same design philosophy.