h4.heading {
    background-color: navy;
    color: lavender;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 14pt;
    font-weight: bold;
    font-style: italic;
    padding: 4px;
    text-align: left;
  }
  #prompt {
    color: #000000;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 10pt;
  }
  #numbersHeading {
    background-color: yellow;
    color: black;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 14pt;
    font-weight: bold;
    padding: 10px;
  }
  #numbers {
    background-color: yellow;
    color: blue;
    font-family: Courier, monospace;
    font-size: 12pt;
    font-weight: bold;
    padding: 10px;
  }