Worked on the jellyfin/jellyfin-vue repository to modernize the user interface by migrating core component and route styling from Vuetify to UnoCSS. Delivered 16 targeted feature migrations, refactoring CSS across key UI surfaces such as playback controls, search, metadata, and various item views. This initiative unified theming, reduced the overall CSS footprint, and set the foundation for faster rendering and easier future theming. Each migration was implemented with focused, per-component commits to ensure traceability and rollback capability. Utilized advanced front end development skills with Vue.js, JavaScript, and CSS, demonstrating disciplined architectural improvements without introducing new bug fixes during the period.