Duolingo 100 Day Streak Animation

The animation begins with a grey flame-shaped placeholder that morphs into a yellow circle containing Duo the owl. Duo then bursts outward in a fiery explosion, spinning and transforming into a flaming mascot wearing sunglasses as the background transitions to vibrant orange. The streak counter rapidly increments from 99 to 100 with a springy overshoot. Below, a weekly calendar row slides up, and the daily streak checkmarks pop into view in a staggered sequence. Finally, the primary action button and share icon slide up from the bottom to complete the celebration.