React.js Developer Needed for Small UI Fix

We have an existing React.js website and need help fixing one small responsive UI issue. The page is already built and functioning correctly, but the header/navigation does not display properly on mobile devices. On smaller screens, the navigation links overflow the container and the menu button is slightly misaligned. We will provide the current source code and a screenshot showing how the mobile header should look to the selected candidate. This is a very small frontend task and should only require changes to one component and its related CSS. The final result should display correctly on both desktop and mobile without horizontal scrolling or overlapping elements.