input[type=checkbox]{cursor:pointer;appearance:none;outline:0;width:16px;height:16px}input[type=checkbox]:after{content:"";border:2px solid #fff;border-width:0 2px 2px 0;width:8px;height:11px;display:none;position:absolute;top:0;left:3px;transform:rotate(45deg)}input[type=checkbox]:checked:after{display:block}input[type=checkbox]:disabled:after{border-color:#7b7b7b}