- 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.