During March 2026, the developer contributed to the catppuccin/userstyles repository by implementing consistent theming for the modal backdrop in WhatsApp Web. They addressed a theming regression by ensuring the modal-backdrop-solid component matched the overall visual style, preventing inconsistencies across the user interface. Their approach focused on isolating changes within the WhatsApp Web styles module, which supports future scalability and maintainability. Using CSS, LESS, and front end development skills, the developer validated cross-component theming to maintain a cohesive user experience. The work demonstrated attention to modularity and long-term maintainability, though the scope was limited to a single feature update.