I meant my proposed solution was a kludge, actually.
Thing I was suggesting is to grab each special link you want to include and combine them into one variable, then just put it once and stuffs. Concatenating is adding something to an end of another thing, usually in the context of strings (aka "lol" + "wat" = "lolwat").
I'll note that I have like no CSS experience at all and the whole variable syntax and everything is pretty foreign to my C-style eyes, was kinda hard to read but is probably standard for html, css etc. Can't guarantee that I understood anything.