.sidebar {
    height: 100%;
    width: 160px;
    position: fixed;
    z-index: 2;
    top: 0;
    left: 0;
    background-color: #111;
    overflow-x: hidden;
    padding-top: 16px;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
  }
  
  .sidebar a {
    padding: 25px 8px 10px 16px;
    text-decoration: none;
    font-size: 16px;
    color: #b1b1b1;
    display: block;
    cursor: pointer;
  }
  
  .sidebar a:hover {
    color: #79FDAE;
  }
  
  .mainbar {
    height: 100%;
    width: 100%;
    position: fixed;
    z-index: 3;
    top: -15px;
    left: 160px;
    background-color: white;
    overflow-x: hidden;
    padding-top: 16px;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
  }
  
  .mainbar a {
    padding: 0px 4px 20px 25px;
    text-decoration: none;
    font-size: 16px;
    color: #818181;
    display: block;
  }
  
  .mainbar a:hover {
    color: green;
  }
  
  .mainbar b {
    border: none;
    background-color: inherit;
    padding: 30px 0px 10px 20px;
    font-size: 16px;
    display: inline-block;
   }

  /* .mainbar b:hover {
    background:: #eee;
    cursor: pointer;
  } */
  
  .mainbar c {
    padding: 0px 4px 0px 25px;
    text-decoration: none;
    font-size: 16px;
    color: #818181;
    display: block;
  }
  
  .mainbar d {
    padding: 0px 4px 0px 0px;
    text-decoration: none;
    font-size: 16px;
    color: #818181;
    display: inline-block;
  }
  
  .mainbar d:hover {
    color: #79FDAE;
  }

  button{
    padding: 5px;
    border: hidden;
    border-color: #111;
    background: none;
    color: #1e1e1e;
    width: 100px;
    border-radius: 5px;
  }

  button:focus{
    background-color: lightblue;
  }

  .opened-image img{
    background-color: #1e1e1e;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: scale-down;
    border: 0;
  }

  .opened-video video{
    background-color: #1e1e1e;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: scale-down;
    border: 0;
  }

  #tab-image-footer {
    position: absolute;
    width: 100%;
    height: 25px;
    bottom: 0;
    right: 0;
    padding: 5px 12px;
    z-index: 10;
    background-color: #1e1e1e;
    color: #fff;
  }

  #tab-video-footer {
    position: absolute;
    width: 100%;
    height: 25px;
    bottom: 0;
    right: 0;
    padding: 5px 12px;
    z-index: 10;
    background-color: #1e1e1e;
    color: #fff;
  }

  .img-thumbnail{
    width: 100%;
    height: 60%;
    object-fit: cover;
    border-radius: 3px;
  }

  .opened-video iframe{
    margin-top: 40px;
    width: 100%;
    height: 33.5vh;
  }