.tab{
    flex-grow: 1;
    padding:5px;
    list-style:none;
    border:solid 1px #CCC;
    text-align:center;
    cursor:pointer;
  }  
  .panel{
    display:none;
  }
  .tab.isActive{
    background:#3e4073;
    color:#FFF;
  }
  .panel.isShow{
    display:block;
  }