.horizontal {

    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: gray;
    table-layout: fixed;
    
  }

  .horizontal li {
    float: left;
    display: table-cell;
  }

  .horizontal li a {
    display: block;
    color:white;
    text-align: center;
    padding: 16px;
    text-decoration: none;
    display: block;
  }
  .horizontal li a:hover {
    color: #f1f1f1;
  }

  .sidenav {
    height: 100%;
    width: 192px;
    position: fixed;
    z-index: 1;
    top: 55px;
    left: 0;
    background-color:gray;
    overflow-x: hidden;
    padding-top: 20px;
  }
  
  .sidenav a {
    padding: 6px 8px 6px 16px;
    text-decoration: none;
    font-size: 25px;
    color: white;
    display: block;
  }
  
  .sidenav a:hover {
    color: #f1f1f1;
  }
/* 
  .maincontainer {
    height: 100%;
    width: 100%;
    position: fixed;
    z-index: 1;
    top: 140px;
    left: 195px;

  } */