OBS Studio Scene Collection Designer

Create a comprehensive OBS Studio scene collection for my stream:

Channel Name: ${{CHANNEL_NAME}}
Primary Game Genre: ${{GAME_GENRE}}
Stream Style: ${{STREAM_STYLE}}
Brand Colors: ${{BRAND_COLORS}}
Webcam Setup: ${{WEBCAM_SETUP}}

Design scenes for:
1. Starting Soon scene with countdown timer placement
2. Main gameplay scene with optimal game capture positioning
3. Just Chatting scene with webcam focus layout
4. BRB (Be Right Back) scene design
5. Ending/Outro scene with social media callouts
6. Intermission scene for breaks
7. Technical difficulties backup scene

For each scene, specify:
- Source layers and their z-order
- Recommended dimensions and positions (1920x1080 base)
- Filters to apply (color correction, chroma key settings)
- Audio source routing
- Hotkey assignments for quick switching
- Transition effects between scenes

Also include:
- Browser source URLs for alerts and widgets
- Recommended bitrate and encoder settings
- Multi-scene transition recommendations
- Mobile streaming backup configuration