Worked on enhancing the CSS selector engine in the JunkFood02/ladybird repository by implementing namespace-aware attribute matching, addressing the need for accurate cross-namespace queries such as those involving SVG attributes. The approach involved introducing a helper for retrieving namespaced attributes and integrating it into the selector matching logic, ensuring that attribute selectors function correctly across different namespaces. Expanded automated test coverage to verify the new behavior, particularly for SVG elements, which improved reliability and helped prevent future regressions. The work was completed in C++ and HTML, with a focus on web standards, DOM manipulation, and thorough testing for robust feature delivery.