UI Reasoning: Music Streaming. Recommended Pattern: Feature-Rich Showcase. Style Priority: Dark Mode (OLED) + Vibrant & Block-based. Color Mood: Dark (#121212) + Vibrant accents + Album art colors. Typography Mood: Modern + Bold typography. Key Effects: Waveform visualization + Playlist animations. Decision Rules: {"must_have": "audio-player-ux", "if_discovery_focused": "add-playlist-recommendations"}. Anti-Patterns: Cluttered layout + Poor audio player UX. Severity: HIGH.