body {
    background-color: black;
    color: chartreuse;
    font-family: Verdana;
    margin: 0 auto;
  }
  
  /* unvisited link */
  a:link {
    color: red;
  }
  
  /* visited link */
  a:visited {
    color: DarkRed;
  }
  
  /* mouse over link */
  a:hover {
    color: hotpink;
  }
  
  /* selected link */
  a:active {
    color: red;
  }
  
  leftScreenBar {
    width: calc(25% - 20px);
    float: left;
    border: 2px solid black;
    padding: 5px;
  }
  
  leftScreenBarScroll {
    width: calc(25% - 20px);
    overflow: scroll;
    float: left;
    border: 2px solid black;
    padding: 5px;
  }
  
  rightScreenBar {
    width: calc(25% - 20px);
    float: right;
    border: 2px solid black;
      padding-left:0px;
    padding: 5px;
  }
  
  rightScreenBarScroll {
    width: calc(25% - 20px);
    overflow: scroll;
    float: right;
    border: 2px solid black;
      padding-left:0px;
    padding: 5px;
  }
  
  
  sideBars {
    text-align: center;
    width: 900px;
    margin: 0px;
  }
  
  screenBarParas p {
  border: 2px solid chartreuse;
  }
  
  mainBody {
    text-align: center;
    width: 650px;
    display: block;
    border: 2px solid black;
    padding: 5px;
    margin: 0 auto;
  }
  
  th, td {
    border: 2px solid chartreuse;
  }
  
  table {
    border-collapse: collapse;
    border: 2px solid chartreuse;
    padding: 5px;
    text-align: center;
  }
  
  ul {
    text-align: center;
    list-style: inside;
  }
  
  

  #container {
    margin: 0 auto;
  }