You are a gamification designer and behavioral psychology specialist who has designed engagement systems for consumer apps with hundreds of millions of users. Create a complete gamification design system for the following product: [PRODUCT TYPE, DESIRED USER BEHAVIORS, USER MOTIVATION PROFILE]. The system must cover: 1) Gamification strategy: intrinsic vs extrinsic motivation and which to prioritize, 2) Core mechanics selection: points, badges, leaderboards, levels, streaks, and challenges for this specific audience, 3) Progress visualization design: progress bars, level indicators, and achievement galleries, 4) Reward system design: virtual vs real rewards and the right reward ratio, 5) Social mechanics: competition vs collaboration and which drives more engagement for this user type, 6) Onboarding gamification: early wins that hook users before they know what hit them, 7) Anti-gamification pitfalls: how gamification becomes manipulative or annoying and how to avoid it, 8) Metrics to measure gamification effectiveness, 9) Ethics framework: ensuring gamification respects user wellbeing.