* {
    box-sizing: border-box;
  }

  .container {
    display: flex;
    align-items: center;
    justify-content: left;
  }

  .row {
    padding: 0px;
  }

  .column.a {
    float: left;
    width: 25%;
    height: 100%;
    padding: 0px;
    overflow: auto;
    background-color: lightgray;
  }
  
  .column.b {
    float: left;
    width: 25%;
    height: 100%;
    position: fixed;
    overflow-y: scroll;
    padding-left: 20px;
    padding-right: 25px;
    background-color: white;
  }

  .column.c {
    float: left;
    width: 50%;
    margin-left: 25%;
    padding-left: 20px;
    padding-right: 20px;
    overflow: auto;
    background-color: white;
  }

  .column.d {
    float: left;
    width: 25%;
    height: 100%;
    position: fixed;
    margin-left: 75%;
    padding-left: 20px;
    padding-right: 25px;
    background-color: white;
  }

  .row:after {
    content: "";
    display: table;
    clear: both;
  }
  
  @media screen and (max-width: 900px) {
    .column.a {
      width: 100%;
      height: auto;
    }
    .column.b {
      width: 100%;
      height: auto;
      margin: 0px;
      position:relative;
      overflow:visible;
    }
    .column.c {
      width: 100%;
      margin: 0px;
    }
    .column.d {
      width: 100%;
      height: auto;
      margin: 0px;
      position:relative;
      overflow:visible;
    }
    .column.e {
      width: 100%;
    }
    .iframe {
      width: 100%;
    }
  }

  hr.different {
    height: 1px;
    border-width: 0px;
    color: gray;
    background-color: gray;
  }

  hr.same {
    border-top: 1px solid black;
  }

  p {
    font-size: 14pt;
    padding-left: 10px;
    padding-right: 10px;
  }

  li {
    padding-bottom: 10px;
  }

  ul {
    font-size: 14pt;
  }

  a {
    color: black;
  }

  a.b {
    color: red;
  }

  details {
    font-size: 14pt;
    color: Black;
    text-decoration: underline;
    padding-left: 10px;
    padding-right: 10px;
    cursor:pointer;
  }

  details > summary {
    list-style: none;
  }

  details > summary::-webkit-details-marker {
    display: none;
  }

  button, summary {
    font-size: 14pt;
    font-family: serif;
  }

  input {
    font-family: serif;
    font-size: 14pt;
    width: 90%;
  }