.correct {
            background-color: #d4edda;
        }
        .incorrect {
            background-color: #f8d7da;
        }
        .question {
            margin-bottom: 20px;
        }
        .option {
            cursor: pointer;
        }
        .answer {
            display: none;
        }
        .buttons {
            display: flex;
            gap: 10px;
        }
        .btn {
            padding: 10px 20px;
            font-size: 16px;
            border: none;
            cursor: pointer;
            border-radius: 5px;
        }
        .btn-submit {
            background-color: #4CAF50;
            color: white;
        }
        .btn-reset {
            background-color: #f44336;
            color: white;
        }
        .btn-share {
            background-color: #008CBA;
            color: white;
        }