body {
      font-family: Arial, sans-serif;
      margin: 0 auto;
      max-width: 40em;
      padding: 20px;
      color: #333;
      font-size: 14px
}

#container {
  width: 760px;
  margin: 20px auto;
  border: 1px solid #ccc;
  background: #f9f9f9;
}