[chacha21]

Quickfix : I have added a button to hide the TOC. Not sure if it fits mobile screens anyway.

[setr]

Body text remains at its original width when ToC is hidden, remaining unreadable at like 10% of screen width (with a lot of blank space).

Probably better quick fix: have ToC initialize as hidden on page load

[FastEatSlow]

Chrome's developer tools has a device toolbar to help you test usability on mobile devices.

[makapuf]

So does firefox if you're using this browser https://developer.mozilla.org/en-US/docs/Tools/Responsive_De...

[chacha21]

Thanks, I have added some more "mobile compliant" CSS styles.

[darnir]

Its still unreadable on mobile. 10% or less of the screen is being used for the text