html, body {
  font-family: Chivo, -apple-system, sans-serif;
  font-size: 14px;
  font-weight: 200;
  color: #999;
  background: #222;
  min-height: 100vh;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  margin: 0;
}

a {
  color: #fff;
  text-decoration: none;
}

a:hover { 
  border-bottom: 2px solid currentColor;
}

header {
  position: sticky;
}

header a {
  text-decoration: none;
}

h1, h2, h3, h4, h5, h6 {
  font-size: 1em;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 400;
  color: #fff;
  margin-top: 2em;
}

main {
  padding: 20px;
}

main img {
  max-width: 640px;
}

header {
  padding: 20px;
}

header h1 {
  margin: 0;
}

footer {
  padding: 20px;
}

p, ul, h1, h2, h3, h4, h5, h6 {
  max-width: 640px;
}

pre[class*="language-"] {
  font-size: 16px !important;
}