During December 2025, Shailen enhanced the catppuccin/userstyles repository by delivering a Dark Theme Header Enhancement focused on improving header visibility and consistency for dark mode users. Using CSS and LESS, Shailen addressed header contrast issues and ensured alignment with the existing design system, reducing visual drift across the interface. The work involved adaptive header styling that responds correctly to dark mode settings, contributing to a more polished and accessible user experience. While the contribution was limited to a single feature over one month, the implementation demonstrated attention to UI/UX design principles and careful version control practices throughout the development process.