/* Streamlined classes for quiz attempt messages */
        .msg-passed { background-color: #28a745; color: white; border: none; padding: 10px 20px; border-radius: 5px; cursor: not-allowed; font-weight: bold; }
        .msg-error { color: #d32f2f; font-weight: bold; margin-top: 15px; padding: 10px; background: #ffebee; border-radius: 5px; }
        .msg-warning { color: #e65100; font-weight: bold; margin-top: 15px; padding: 10px; background: #fff3e0; border-radius: 5px; }
        .btn-locked { background-color: #ccc; cursor: not-allowed; border: none; padding: 10px 20px; border-radius: 5px; }
        
        /* Video Responsive Styling */
        .video-wrapper {
            position: relative;
            padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
            height: 0;
            overflow: hidden;
            margin-bottom: 20px;
            border-radius: 8px;
            box-shadow: 0 4px 10px rgba(0,0,0,0.1);
            background: #000;
        }
        .video-wrapper iframe {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            border: 0;
        }
        .video-title {
            margin-bottom: 12px;
            font-weight: 600;
            color: var(--text-color);
            font-size: 1.1rem;
        }
        .module-notes {
            margin-top: 20px;
            line-height: 1.6;
        }