🎨 Dynamic DOM Theme Detection & Chameleon Visual Parity (Sources & Studio):
- Dynamic DOM-Based Theme Detection: Replaces OS Media Query assumptions with direct sRGB luminance calculation of NotebookLM's computed background color. Automatically applies data-mm-theme="dark|light" to on initial load and upon SPA DOM mutations.
- Chameleon Search Pills Theming:
• Dark Mode: Seamless #282a2c dark container (exact 1:1 match with NotebookLM Studio cards), #e3e3e3 light text, subtle border, eradicating all harsh white glare.
• Light Mode: Soft #f1f3f4 background, #1f1f1f dark text, and #dadce0 subtle border.
- Complete Studio Container Transparency: Enforces background: transparent on all Studio header wrappers, eliminating any non-transparent rectangular footprints.
- 1:1 Geometric Parity: Unified 40px height, full corner radius (9999px), matching margins (8px 12px), and symmetrical button placements (clear reset at 46px, filters and duplicates at 10px).
- Refined Active Action Buttons: Replaces saturated blue buttons with discrete Material 3 translucent halos (rgba(66, 133, 244, 0.16)).

💬 Circular GM3 Icon Button for Chat Export:
- Minimalist GM3 Icon Button: Replaced the bulky text label with a compact 32x32px circular Material 3 icon button positioned cleanly in the chat bottom bar before the source count indicator.