UI Reasoning: File Manager & Transfer. Recommended Pattern: Feature-Rich Showcase + Demo. Style Priority: Flat Design + Minimalism. Color Mood: Functional neutral + file type color coding (PDF orange, doc blue, image purple). Typography Mood: Professional + Clean hierarchy. Key Effects: Color shift hover + Fast 150ms transitions + No shadows. Decision Rules: {"if_ux_focused": "prioritize-clarity", "if_mobile": "optimize-touch-targets"}. Anti-Patterns: Excessive decoration + Complex shadows + 3D effects. Severity: HIGH.