.up-down-scroll
   {
      position: fixed;
      bottom: 0.25rem;
      right: 0.25rem;
      padding: 0rem;
      margin: 0rem;
      background-color: transparent;
      width: 1.5rem;
      height: 3rem;
   }
.up-down-scroll button
   {
      display: table;
      width: 1.5rem;
      height: 1.5rem;
      padding: 0.25rem;
      margin: 0rem;
      background-image: none;
      background-color: #6b6b6b;
      cursor: pointer;
      border-width: 0rem;
      font-size: 1rem;
          
      line-height: 1rem;
      text-align: center;
   }
.up-down-scroll button:hover
   {
      background-color: #8d8d8d;
   }
.up-down-scroll button i
   {
      display: table-cell;
      width: 1rem;
      height: 1rem;
      font-style: normal;
      font-weight: bold;
      color: #ffffff;
      vertical-align: middle;
      text-align: center;
   }