body {
  font-family: arial;
  font-size: 18px;
}

.container {
  width: 700px;
  margin: 30px auto;
}

li {
  list-style: none;
  line-height: 2em;
}

.header, .footer {
  text-align: center;
  background: #f4f4f4;
  padding: 20px;
}

.header {
  border-bottom: #ccc 3px solid;
}

.footer {
  border-top: #ccc 3px solid;
}