2040
During a Duolingo speaking exercise, tapping the microphone activates a dynamic blue waveform audio visualizer that pulses in real time with the user's voice. Upon correct pronunciation, the active flashcard flips to green translated text with a subtle particle pop, then smoothly transitions to reveal the next card in the stack as the top combo progress bar advances. Once the stack is cleared, the completed cards collapse into a stacked summary list and a bright green success banner slides up from the bottom.
