You bought a tweed blazer from a vintage store, a cream turtleneck, and a pair of brown leather loafers. You put them on, stood in front of the mirror, and looked like you were about to give a lecture on a subject you don’t actually know. The outfit felt costumey. That is the problem with most dark academia library outfits. They copy a mood board—dusty books, candlelight, a stack of papers—without asking whether the pieces work together as real clothes you can sit in for six hours. A blazer that looks great hanging on a chair feels terrible when the…