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In Duolingo's daily quests interface, completed quests are highlighted with an active, playful idle animation. The reward chest for the completed 'Complete 2 lessons' quest bounces up and down with a subtle squash-and-stretch motion, accompanied by a soft, expanding golden glow behind it to draw the user's attention. Simultaneously, the active progress bars (such as the pink 'Earn 15 Quest Points' bar) feature a diagonal white shimmer that sweeps from left to right, indicating active progress.
