During February 2026, this developer focused on enhancing mobile usability for the cBioPortal/cbioportal-frontend repository by delivering a responsive redesign of the right sidebar. The work involved introducing CSS media queries and reshaping the flexbox layout to ensure consistent usability and appearance across various screen sizes. By refining padding and spacing, the developer maintained a clean and readable interface on mobile devices, directly addressing the challenges of responsive design. Utilizing SCSS and front end development skills, the implementation adhered to repository standards and improved navigation for users on smaller screens. No major frontend bugs were reported during this period of focused work.