style> body { background-color: #f4f4f4; font-family: 'Arial', sans-serif; } .container { text-align: center; background-color: #ffffff; padding: 20px; border-radius: 10px; box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1); margin: 50px auto; max-width: 400px; } button { background-color: #4CAF50; color: white; padding: 10px 20px; font-size: 16px; cursor: pointer; border: none; border-radius: 5px; } button:hover { background-color: #45a049; }