body,
html {
  width: 100%;
  font-size: 16px;
  margin: 0;
  background: #222;
  color: #ccc;
  font-family: sans-serif;
}

h1 {
  font-size: 3em;
  text-align: center;
  font-weight: 300;
}

h2 {
  margin: 1em 0 0 0;
}

main {
  max-width: 50em;
  margin: 0 auto;
}

a {
  /* a nice blue */
  color: #4493f8;
  text-decoration: none;
}

img, video {
  max-width: 100%;
}

ul {
  padding-left: 0;
  margin: 0;
  list-style-type: none;
}

.warning {
  color: #b22;
}

.warning a {
  color: #b88;
  text-decoration: underline;
}