Changing all fonts

Good afternoon. Please tell me the list of commands that I should write in the file obsidian.css to change all the fonts in the application (the font of the folder and file names, the font of the editing window, the preview font, etc.).

If you check out some of themes obsidain.css like in Red Graphite by seanwcom you can see how they implemented fonts.

This might be helpful https://forum.obsidian.md/t/getting-comfortable-with-obsidian-css/133