Create a task completion celebration modal for a mobile fitness app. The modal should include: A circular progress indicator showing 100% completion A congratulatory message: 'Great job! You've completed your workout!' A motivational statistic, e.g., 'You've exercised 5 days in a row!' A 'Share Results' button with a social media icon A 'Close' button to dismiss the modal The design should be energetic and encouraging, using colors and imagery that convey achievement and vitality. The modal should be by default open.