.sort_demo{height:2em}.sort_demo div.row{margin:0.25em 0;height:2em;width:100%}.sort_demo div.row div{border:1px solid #fff;float:left;height:2em;margin:0 0.1em;text-align:center;width:2em}.sort_demo div.row div.active{border-color:red}.sort_demo div.row div.selected{border-color:blue}.sort_demo div.row div.done{border-color:black}.sort_demo div.cell_hidden div{border:1px solid #000;visibility:hidden}.sort_demo div.cell_hidden div.active,.sort_demo div.cell_hidden div.done .sort_demo div.cell_hidden div.selected{visibility:visible}.sort_demo .invisible{visibility:hidden}