Guilherme worked on the Flagsmith/flagsmith repository, focusing on improving the documentation’s responsive layout through targeted CSS adjustments. He addressed a bug that caused display issues across various screen sizes by refining width properties and updating media queries, ensuring that sections and card grids render correctly on both desktop and mobile devices. Using his skills in CSS, front end development, and responsive design, Guilherme enhanced the usability and readability of the documentation, reducing layout-related friction for users. This work, while limited in scope to a single bug fix, demonstrated careful attention to detail and a solid grasp of responsive web techniques.