[mgeraci]

This looks great! One suggestion is that in full screen mode, the textarea doesn't stretch across the screen (it's a centered column) but since there are no borders it is hard to tell where the active area is. I think that clicking on the empty space outside of the main column could give focus to the textare, and that would have made it more clear for me.

[afshinmeh]

Thanks, good suggestion. It would be so better if you submit your suggestion in Github issues.