body {
  background-color: #eee;
}

.container {
  box-sizing: border-box;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}

main {
  background-color: #fff;
  border: 1px solid #ccc;
  padding: 1em;
}

footer {
  text-align: right;
  padding: 0.25em 1em;
}