ul{
    list-style-type:none;
  }
  
  ul span.folder{
    font-size: 1.5rem sans-serif;
    text-transform: capitalize;
    cursor: pointer;
  }
  
  ul.nested li{
    padding-left: 0.1rem;
  }
  
  ul span.folder::before{
    display: inline-block;
    margin-right: 0.4rem;
    font: 1.8 rem sans-serif;
  }
  .file-html::before{
    display: inline-block;
  }
  
  .arrow{
    cursor: pointer;
  }