#checkbox2 ul {
  width: ;
  margin-left: auto;
  margin-right: auto;
  list-style-type: none;
  background: white;
}



#checkbox2 ul a {
  display: block;
  height: 100%;
  text-decoration: none;
  color: black;
  padding-left: 10px;
  position: relative;
  transition: background .3s;
}

#checkbox2 ul a:after {
  
  position: absolute;
  right: 10px;
}

#checkbox2 ul a:hover {
  background: #fff;
}