Worked on enhancing the catppuccin/userstyles repository by delivering a feature that aligns ArchWiki theming with user system color schemes. Focused on updating CSS selectors and front end logic to detect and respect both site-configured and system-level light or dark mode preferences, ensuring the Catppuccin theme displays consistently across all ArchWiki pages. Utilized CSS and Less to implement robust color-scheme detection, reducing visual inconsistencies and reinforcing adherence to the design system. Maintained clear commit messaging to support future code reviews and rollbacks. The work addressed a specific need for visual consistency, demonstrating attention to user experience and maintainability.