.expand-menu[aria-expanded=true] .chevron{top:.125rem}.expand-menu[aria-expanded=true] .chevron:after{transform:rotate(-135deg)}.chevron{position:relative;top:-.125rem}.chevron:after{content:"";border:3px solid #fff;border-width:0 3px 3px 0;margin-left:4px;padding:3px;display:inline-block;transform:rotate(45deg)}