.category-item input{
    visibility:hidden;
    margin-left:-20px
  }

  .category-item label{
    cursor: pointer;
    padding: 30px;
    display:block;
    border:solid 1px;
    position:relative;
  }

  .category-item label input:checked:after{
    content:"";
    display:block;
    background-color:red;
    position:absolute;
    left:0;right:0;
    top:0;
    bottom:0;
    z-index:-1;
    visibility:visible;
  }