Heya! Just passing by - if i may give a hint. If you're not planning to, for some reason, host the entirety of sadgirl.online at your website in a folder called "sadgrl", the links in your navbar need the protocol (https://) and top level domain (.online). Adding those will make the links work ^w^
"/sadgirl.online" in is short for "https://delunar.neocities.org/sadgirl.online" because of the first slash. "https://sadgirl.online" is an actual link to that website