Ok, here is what actually need to be in custom css for things to work out. This is what I have, and so far it works.
ALL of this needs to be there!!!!
.Post::before, .Post::after {content:none;}
@media (min-width: 992px) {
.DiscussionPage-nav, .DiscussionPage-nav>ul {
position: sticky;
top: 80px;
}
.App {overflow-x: visible;}
}
1st post is not huge and navbar sits where it needs to be, right next to "write reply"