I can see the page is responsive and when the browser width comes down to a threshold the sidebar will hide automatically.
But when I use it on the iPad Pro 12.9 vertical mode, the width may not be short enough to cause the sidebar to disappear. I just want to have a full-screen reading view, that would be great.
To have a full-screen view, I also tried some iPad apps with OPDS, but can't connect to the catalog. Since I don't know whether the OPDS will sync the highlights and the browser experience is good enough, I will stick with the browser.
If there is no option to hide the sidebar, would you mind adding one?
Lastly, thank you for building such an amazing app!