Cenk Akyol enhanced the sidebar user interface in the bettercodepaul/swt2-bsa-frontend repository, focusing on visual consistency and accessibility. He replaced hard-coded HEX color values with CSS variables, enabling scalable theming and easier maintenance. By improving color contrast and standardizing styling through SCSS, Cenk addressed accessibility concerns and reduced the risk of visual regressions. His work included targeted code cleanup, such as formatting corrections and the removal of explicit color values, all delivered under a ticket-driven workflow. Over the course of one month, Cenk demonstrated skills in CSS, SCSS, and UI design, delivering incremental improvements without introducing new bugs.