body {
      text-align: center;
    }

    #monitor {
      background-color: blue;
      font-weight: bold;
      border: 1em solid rgb(73, 73, 73);
      color: white;
      width: 20%;
      height: 100px;
      margin: 1em auto;
      padding: 0.2em 0;
    }

    button {
      background-color: rgb(5, 193, 5);
      color: white;
    }