body {
  font-family: 'Oxygen', sans-serif;
  background-color: #D6E3E8;
}

.container {
  width: 640px;
  margin: 20px auto;
  text-align: left;
}

header {
  text-align: center;
}

header h1 {
  font-weight: 300;
}

#my-canvas-id {
  background-color: white;
  display: block;
  margin-left:auto;
  margin-right:auto;
}

footer {
  text-align: center;
  margin-top: 50px;
}

footer .twitter-follow-button {
  margin-left: 20px;
  margin-right: 20px;
}