html {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 14pt;
    line-height: 1.3;
  }
  
  article {
    margin: 5rem 0;
  }
  
  section {
    margin: 3rem 0;
  }
  
  h1, h2, h3, h4, h5, h6 {
    font-weight: normal;
  }
  
  article > h1 {
    font-weight: bold;
  }
  
  samp {
    display: block;
    margin: 1em 0;
  }
  
  code, kbd {
    color: steelblue;
    font-style: normal;
    font-weight: normal;
  }
  
  code.tag::before {
    content: "<";
  }
  
  code.tag::after {
    content: ">";
  }
  
  ol.instructions {
    background-color: #f2f2f2;
    padding: 1rem 1rem 1rem 2rem;
    color: #666666;
    font-style: italic;
    font-size: 0.8rem;
    line-height: 1.2;
  }
  
  ol.instructions > li {
    margin: 0.4rem 0;
  }
  
  ol.instructions > li:first-child { margin-top: 0; }
  ol.instructions > li:last-child { margin-bottom: 0; }
  
  .two-columns-example > * {
    padding: 1rem;
    font-family: Georgia, 'Times New Roman', Times, serif;
    font-size: 0.8rem;
    color: white;
  }
  
  .two-columns-example > :first-child {
    background-color: rgb(34, 57, 139);
  }
  
  .two-columns-example > :last-child {
    background-color: rgb(20, 35, 83);
  }

  img {
    max-width: 100%;
  }

  body {
    margin-left: auto;
    margin-right: auto;
    width: 90%;
    max-width: 40rem;
  }

  html { font-size: 12pt; }
  @media (min-width: 640px) {
    html { font-size: 16pt; }
  }

  @media (min-width: 640px) {
    .two-columns-example {
        display: flex;
    }
    .two-columns-example > * {
        width: 50%;
    }
  }