Worked on the AvaloniaUI/Avalonia repository to deliver a UI polish feature that improved visual harmony between window decorations and content. Focused on making the WindowDrawnDecorations background transparent in both Fluent and Simple themes, the approach involved careful XAML development and theming adjustments to ensure seamless integration with existing UI elements. The implementation maintained accessibility standards and was validated through theme previews to confirm consistent appearance across different styles. All changes were documented with clear, traceable commits referencing the relevant issue. Demonstrated proficiency in XAML, UI design, and theming, contributing to a more cohesive and visually integrated user experience.