body {
            font-family: Arial, sans-serif;
            background-color: #f4f4f4;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            align-items: center;
            padding-top: 20px;
        }
        .category {
            margin: 20px 0;
            padding: 10px;
            background: #ffffff;
            border: 1px solid #ddd;
            width: 300px;
            border-radius: 8px;
        }
        .category h3 {
            margin-top: 0;
            font-size: 18px;
            color: #333;
        }
        .option {
            display: flex;
            align-items: center;
            padding: 5px 0;
            cursor: pointer;
        }
        .option input[type="radio"] {
            margin-right: 8px;
        }
        #generateMessage {
            padding: 10px 20px;
            margin-top: 20px;
            background-color: #4CAF50;
            color: white;
            border: none;
            border-radius: 5px;
            cursor: pointer;
        }
        #resultMessage {
            margin-top: 20px;
            padding: 15px;
            background: #ffffff;
            border: 1px solid #ddd;
            border-radius: 8px;
            width: 300px;
            font-size: 16px;
            color: #333;
            white-space: pre-wrap;
        }