Andras Horvath developed a theme-aware custom scrollbar for the timeline container in the hackclub/YSWS-Catalog repository, focusing on enhancing visual consistency and user experience. Using CSS and front end development skills, Andras implemented custom colors, dimensions, and hover effects that adapt to both light and dark themes, ensuring the UI aligns with user preferences and the existing design system. The work emphasized maintainability and accessibility, addressing the need for a more cohesive and readable interface. While the scope was limited to a single feature over one month, the solution demonstrated attention to responsive UI design and adherence to front-end best practices.