Enhance Mobile Website for "25 Years Under the Rising Sun" Author Series

I’ve built an author website in Canva to showcase my eight-book series, "25 Years Under the Rising Sun," based on my 25 years in Japan. While much of the work is done, I need help improving its mobile responsiveness, layout, and navigation to make it more polished and professional... (Budget: $75 - $150 CAD, Jobs: CSS, Graphic Design, HTML, PHP, Website Design)