UI Reasoning: Music Creation & Beat Maker. Recommended Pattern: Interactive Product Demo + Storytelling. Style Priority: Dark Mode (OLED) + Motion-Driven. Color Mood: Dark studio background + track colors rainbow + waveform accent + BPM pulse. Typography Mood: High contrast + Light on dark. Key Effects: Subtle glow + Neon accents + High contrast. Decision Rules: {"if_light_mode_needed": "provide-theme-toggle"}. Anti-Patterns: Pure white backgrounds. Severity: HIGH.