body {
  font-family:system-ui;
  font-size: 18px;
}



  details:focus,
  details:focus-within,
  details:hover {
    /* background:#ffeb3b; */
    /* outline:2px #000 solid; */
  }


  details ul li {
  
  }

  summary {
    cursor:pointer;
  }

  summary:hover {
    opacity:.75;
  }

  .feed-url {
    color:#aaa;
  }