Roman Kokhalepa developed a Homepage Promotional Advertisement Section for the karinahurzan/project-serious-team repository, focusing on responsive front-end design and accessibility. Using HTML and CSS, Roman structured and styled the component to ensure promotional content displayed consistently across devices and themes. He enhanced accessibility by adding ARIA roles, keyboard navigation, and focus states, making the ad section usable for a wider audience. The work involved iterative improvements through multiple commits, addressing layout alignment, responsiveness, and accessibility issues. Roman’s contribution provided a polished, maintainable solution that increased user exposure to promotional content while maintaining UI consistency and meeting accessibility standards.