/* Custom styles */
        .question-card {
            transition: all 0.3s ease;
        }
        .question-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .option:hover {
            background-color: #f0f0f0;
        }
        .timer {
            animation: pulse 1s infinite;
        }
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.05); }
            100% { transform: scale(1); }
        }
        .progress-bar {
            transition: width 0.3s ease;
        }