body {
  font-family: 'Segoe UI', sans-serif;
  background: #f5f5f7;
  color: #222;
  margin: 0;
  padding: 0;
}
header {
  background: #002b36;
  color: white;
  padding: 1em;
  text-align: center;
}
nav a {
  margin: 0 1em;
  color: #b58900;
  text-decoration: none;
}
main {
  padding: 2em;
}
footer {
  text-align: center;
  padding: 1em;
  font-size: 0.8em;
  background: #eee;
}