body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #111;
  color: #f0f0f0;
}
header, footer {
  background: #222;
  padding: 20px;
  text-align: center;
}
main {
  padding: 40px;
  text-align: center;
}
button {
  padding: 10px 20px;
  background: #ff4500;
  border: none;
  color: white;
  font-size: 16px;
  cursor: pointer;
}
button:hover {
  background: #e03e00;
}
a {
  color: #00ffff;
}