/* Both viewers start each spread on an odd page, so the page-edge shadow has to
   follow the column a page sits in: the left-hand page carries it on its left
   edge, the right-hand page on its right. The base rule in styles.css puts it on
   the right for every page but the first, which is only correct for the opening
   spread. Ported from the studio's outer-edges.css (PR-21, ruled 14 Sep 2026). */
#book > .paper:nth-child(odd)::after{left:0!important;right:auto!important}
#book > .paper:nth-child(even)::after{left:auto!important;right:0!important}