Interface Design Design Principles 1. Clarity Make the interface obvious. Users shouldn't have to guess. 2. Consistency Same actions, same results. Maintain patterns throughout. 3. Feedback Respond to every action. Show progress, confirm success, explain errors. 4. Efficiency Minimize steps. Optimize common workflows. 5. Forgiveness Allow undo. Confirm destructive actions. Recover gracefully. UI Patterns Navigation - Top Nav : Primary navigation, global actions - Side Nav : Section navigation, hierarchical content - Breadcrumbs : Show location in hierarchy - Tabs : Switch between related view…