body {
  max-width: 600px;
  margin: 0 auto;
}

body > header, footer {
  display: flex;
  column-gap: 1rem;
  background-color: #222;
  color: #d6d6d6;
  padding: 1rem;
  border: 5px solid #444;
  align-items: center;
}

body > header {
  justify-content: center;
}

body > main {
  background-color: white;
  padding: 1rem;
}

a {
  color: #90D355;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

footer img {
  border: 5px solid #666;
  margin: 5px;
}

footer a {
  font-size: 16px;
  font-style: italic;
}