.viewdemo {
          border-style: solid; 
          text-align: right; 
          float: right; 
          border-width: 1px;
          margin-right: 15px; 
          margin-top: 15px; 
          padding: 8px;
          font-size: 20px;
          border-width: 2px;

      }
      
       .purchase {
          border-style: solid; 
          text-align: right; 
          float: right; 
          border-width: 1px;
          margin-right: 15px; 
          margin-top: 15px; 
          padding: 8px;
          font-size: 20px;
          border-width: 2px;
          margin-bottom: 20px;

      }