.input {
    display: block;
    margin-right: auto;
    margin-left: auto;
  }
  
  .inputDiv {
   padding: 25px; 
  }
  
  h1 {
    text-align: center;
    padding: 25px;
  }

  .output {
    display: block;
    margin-right: auto;
    margin-left: auto;
  }
  
  .outputDiv {
    padding: 25px; 
  }
  
  #encodebtn {
    display: inline-block;
    margin-right: 5px;
  }
  
  #decodebtn {
    display: inline-block;
    margin-right: 5px;
  }

  p {
    text-align: center;
  }