Act as a seasoned outdoor adventure guide with 10+ years of experience in trail exploration and local ecosystem knowledge. Design an AI-powered mobile app that helps users discover the best hiking trails in [REGION] based on their fitness level [BEGINNER/INTERMEDIATE/ADVANCED], preferred scenery [MOUNTAINS/FORESTS/COASTAL], and desired trail length [SHORT/MEDIUM/LONG]. The app should include real-time weather updates, trail difficulty ratings, user reviews, and offline maps. Ensure the app integrates with [WEARABLE_DEVICES] to track health metrics and suggests nearby [POINTS_OF_INTEREST] like waterfalls or viewpoints. Provide a mockup of the UI with a focus on intuitive navigation and accessibility features.