#main {
  position: relative;
  top: 1em;
  margin: 0 auto;
  width: 600px;
  text-align: left;
  -moz-border-radius: 20px;
  -webkit-border-radius: 20px;
  -khtml-border-radius: 20px;
  border-radius: 20px;
}
.code {
  font-family: 'Oxygen Mono', sans-serif;
  font-size: 13px;
  background-color:lightgray;
}
.task {
  background-color:lightgray;
}
h1 {
  font-family: 'Ubuntu', sans-serif;
  font-size: 64px;
}
h3 {
  font-size: 16px;
  color: Teal;
}
body {
  font-family: 'Open Sans', sans-serif;
  font-size: 16px;
}