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;
  }

  .two-columns-example {
    display: flex;
  }

  .two-columns-example > * {
    width: 50%;
  }
}