body {
  color: #224;
  background-color: #eef;
  font-family: sans-serif;
  line-height: 1.5;
  margin-left: auto;
  margin-right: auto;
  max-width: 768px;
}

header {
  border-bottom: 1px solid #224;
  margin: 1rem;
}

footer {
  margin-top: 20px;
  border-top: 1px solid #224;
  margin: 1rem;
  font-size: small;
}

main {
  margin-left: 1rem;
  margin-right: 1rem;
}

a {
  color: #229;
  text-decoration: none;
}

.logo {
  width: "100%";
  max-width: 600px;
}