body {
  font-family: Arial, sans-serif;
  background: #f4f6f9;
  color: #333;
  margin: 0;
  text-align: center;
}

header {
  background: #4a90e2;
  color: white;
  padding: 20px;
}

main {
  padding: 50px 20px;
}

button {
  padding: 10px 20px;
  font-size: 16px;
  border: none;
  background: #4a90e2;
  color: white;
  border-radius: 6px;
  cursor: pointer;
}

button:hover {
  background: #357ABD;
}

footer {
  margin-top: 40px;
  background: #eee;
  padding: 15px;
}