body {
  margin: 0;
  background-color: #111;
  color: #f0f0f0;
  font-family: Arial, sans-serif;
}
.logo {
  max-width: 300px;
  display: block;
  margin: 2rem auto;
}
footer {
  background-color: #1a1a1a;
  text-align: center;
  padding: 1rem;
  font-size: 0.9rem;
  color: #aaa;
}