Sidebar and content width adjust

Hello,

firstly thank you for the great plugin. I’m just wondering what the easiest way I can adjust the widths of side bar with the topics and the content area on the right. Ideally want to make the sidebar smaller and the content area bigger.

I had a look at the CSS but while I could make the topics narrower, I couldn’t for the life of me reduce the width of the entire docspress-single-sidebar-wrap or the content container.

regards
D.