During December 2024, Bohdan Boichuk delivered a comprehensive header UI and responsive styling overhaul for the SerbynS/project-group-17 repository. He focused on improving visual consistency, device responsiveness, and user interaction by centralizing header styles and refining hover and focus states, particularly for navigation elements like the shop button. Using CSS and HTML, Bohdan incrementally enhanced spacing, alignment, and maintainability across the codebase, ensuring a cohesive user experience without introducing major bugs. His work emphasized front-end development best practices, resulting in a more polished first impression, consistent navigation, and a foundation that simplifies future styling updates and UI maintenance.