Recently, I purchased a custom domain from domain.com and updated the DNS settings to point it to my GitHub Pages. In the DNS settings, aside from the four A records, I added a CNAME record with the name www, pointing to my GitHub Pages URL (username.github.io).
Before the domain redirection, my GitHub Pages homepage loaded correctly, both locally and via the GitHub Pages URL (username.github.io/repository).
However, after setting up the custom domain, I encountered issues with the homepage’s styling.