Duolingo Chess 5 in a Row Thunder Animation

Upon making the winning chess move, the app celebrates a "5 in a row" streak. The progress bar at the top fills completely, triggering a vibrant, multi-colored gradient sweep and a lightning bolt flash. Simultaneously, the chess coach mascot reacts with an energetic animation, and a green success toast slides up from the bottom of the screen, transforming the primary button into a bright green "Continue" state.