Hi @ktbumjun, sorry if the docs weren’t clear enough on this topic. Obsidian Publish doesn’t let you publish individual CSS snippets; however, if you’re comfortable doing so, you can add a single publish.css file to your vault.
So you could take all the contents of the individual CSS snippet files that you use and combine them into a publish.css file at the root of your vault.
Then make sure to upload the publish.css inside the Publish modal:
(yours will show up under the NEW section, unlike mine)
Let me know if that makes sense!