- Removed unused CSS rules: eliminated redundant height utilities and duplicate responsive rules in utilities.css
- Optimized CSS selectors: confirmed efficient BEM architecture and class-based selectors throughout codebase
- Implemented hardware acceleration: added backface-visibility, perspective, transform:translateZ(0), and will-change properties to animated components (messages, buttons) for GPU acceleration
- Maintained performance: preserved only essential utilities while ensuring browser compatibility
Related to task 5.1.1 in UI_UPDATE.MD: CSS Optimization for UI rendering performance.
- Added comprehensive component-specific responsive behavior across all breakpoints
- Implemented container query support with @container rules for modern responsive design
- Created breakpoint overrides for buttons, cards, form controls, chat messages, and video player
- Added container-aware styling for cards, chat components, and buttons
- Introduced component-specific responsive utility classes (.btn-responsive-*, .card-responsive-*, etc.)
- Tested layout behavior across all responsive breakpoints