In single posts that I divided into multiple pages using <!--nextpage-->, I would like to style the extra pages differently. I probably need to use a conditional tag in the Loop, but I can't figure out how WordPress distinguishes the remaining pages in a multi-page post from the opening post page. In other words, I don't know how WordPress knows it's on Page 3 of a long post rather than on Page 1. I want Page 2, Page 3, etc., to look slightly different than Page 1.
Does anyone have any suggestions on how to accomplish this?