WordPress Theme Header Fix, Performance Review & UI Polish

**WordPress Theme Review, Header Fix & UI Improvements** I have a custom WordPress theme that needs a professional review. ### Scope of work * Fix the header layout and behavior (desktop & mobile). * Restore the original header animations/sticky behavior if needed. * Review the theme for CSS, JavaScript, and PHP issues. * Remove conflicts, duplicated or unused code. * Improve performance and responsiveness without changing the site's identity. * Ensure compatibility with the latest WordPress version and plugins. * Suggest and implement subtle UI/UX improvements that make the theme feel more modern, polished, and alive while preserving its current design language. * Improve spacing, transitions, hover effects, typography consistency, and overall visual refinement. * Optimize Core Web Vitals where possible. The objective is **not to redesign the website**, but to make it feel smoother, more elegant, and production-ready while keeping the existing visual identity.