I would like all my project pages to have the same custom style. But for now I only see that every project page can be configured separately (choosing default theme from Setting of the project or creating gh-pages
branch with the source files).
Is there any way to archive what I want? For example, to write custom style in my username.github.io
repo and all project could use that styles to create pages under username.github.io/projectname
with the provided custom styles.