Aron Reinen focused on front-end development for the webkom/lego-webapp repository, addressing a user interface issue that affected modal visibility. Using CSS, Aron resolved a layering problem by adjusting the z-index of the modal overlay, ensuring that modals consistently appeared above menus and other UI elements. This targeted bug fix improved the stability and usability of the application without introducing new features or risking regression. By documenting the change with a clear commit message, Aron enhanced traceability for future maintenance. The work demonstrated attention to detail in CSS and front-end engineering, resulting in a smoother user experience for modal interactions.