/* General styles */
body {
  font-family: Arial, sans-serif;
  text-align: center;
  background-color: #f4f4f9;
  margin: 0;
  padding: 0;
}

header {
  background-color: #4CAF50;
  color: white;
  padding: 10px 0;
}

main {
  margin-top: 20px;
}

p {
  font-size: 18px;
  color: #333;
}

button {
  padding: 10px 20px;
  font-size: 16px;
  color: white;
  background-color: #4CAF50;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background-color: #45a049;
}

#reward-message {
  margin-top: 20px;
  font-size: 18px;
  color: #4CAF50;
  font-weight: bold;
}