//column move icons, when moving columns .col-move-top, .col-move-bottom { width: 9px; height: 9px; position: absolute; top: 0; line-height: 0; font-size: 0; overflow: hidden; z-index: 20000; background: no-repeat center top transparent; } .col-move-top { background-image: theme-background-image('grid/col-move-top'); } .col-move-bottom { background-image: theme-background-image('grid/col-move-bottom'); }