body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 20px;
  background-color: #f5f5f5;
}

#root {
  max-width: 800px;
  margin: 0 auto;
  background-color: white;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

h1, h2, h3 {
  color: #333;
}

button {
  background-color: #4CAF50;
  color: white;
  border: none;
  padding: 10px 15px;
  margin: 5px;
  border-radius: 4px;
  cursor: pointer;
}

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

button:disabled {
  background-color: #cccccc;
  cursor: not-allowed;
}