body {
  margin: 0 auto;
  max-width: 800px;
  padding: 20px;
  font-family: sans-serif;
  color: #333;
  line-height: 140%;
}

img {
  border: none;
}
#effects {
  margin-top: 5em;
}

h1 {
  text-align: center;
  font-size: 4em;
}

h2 {
  margin-top: 2em;
}