/**handles:custom-css**/
*{box-sizing:border-box}.tab{display:none;width:100%;height:50%;margin:0 auto}.current{display:block}button:hover{opacity:.8}.previous{background-color:#bbb}.step{height:30px;width:30px;cursor:pointer;margin:0 2px;color:#fff;background-color:#bbb;border:none;border-radius:50%;display:inline-block;opacity:.8;padding:5px}.step.active{opacity:1;background-color:#69c769}.step.finish{background-color:#4caf50}.error{color:red}