During December 2024, Yurii Pasternak developed a robust header system for the DBodies/project-Group-03 repository, focusing on enhancing user interface quality across large screens. Yurii implemented a new header component with responsive layout and navigation styling, ensuring consistent appearance and usability throughout the application. The work included integrating a menu icon sprite and refining partial header styling to improve navigation clarity. Using CSS, HTML, and responsive design techniques, Yurii addressed layout challenges and fixed a minor HTML syntax issue to maintain valid markup. The project demonstrated careful attention to code quality and traceability, with all changes delivered through documented commits.