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When the user taps the already active feed tab icon (the pink heart) in the bottom navigation bar, it triggers a delightful micro-interaction. The icon quickly shrinks, then springs upward with a pronounced scale overshoot and a subtle rotational wiggle before settling back into place. This bouncy feedback reinforces the playful, gamified brand identity of Duolingo, providing satisfying tactile feedback even when tapping an already active state.
