I discovered Joplin this week by searching for Open Source alternative to OneNote that I use from some years (I try to get off all majors big brothers like Google and Microsoft). I really like this project.
I created yesterday a userstyle.css for custom styles in view pane (more spacing between paragraph, better style for code and pre tags, etc). I would like to have these custom style on other devices like my Android phone.
It could be cool that Joplin sync this file and download it to the other device to apply the custom styles.
Thanks for this projet, hope you will continue to work on it !