:root {
            --black: #000000;
            --dark-gray: #292929;
            --dark-teal: #02353C;
            --white-gray: #F5F5F5;
            --white: #FFFFFF;
            --green-dark: #2EAF7D;
            --green-bright: #2BC444;
            --green-light: #4AE3A8;
            --green-pale: #E4F5E8;
        }
        
        body {
            font-family: 'Hind Madurai', sans-serif;
            background-color: var(--white);
            color: var(--dark-gray);
            line-height: 1.7;
            padding-top: 80px;
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: 'Hind Madurai', sans-serif;
            font-weight: 700;
        }

        .subtitle {
            font-family: 'Hind Madurai', sans-serif;
            font-weight: 600;
        }

        /* Header */
        .navbar {
            background-color: var(--white);
            border-bottom: 1px solid var(--white-gray);
            padding: 15px 0;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }

        .nav-link {
            color: var(--dark-gray);
            font-weight: 600;
            margin: 0 10px;
            position: relative;
        }
        
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--green-dark);
        }
        
        .nav-link:hover {
            color: var(--green-bright);
        }
        
        .nav-link::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: 0;
            left: 0;
            background-color: var(--green-bright);
            transition: width 0.3s;
        }
        
        .nav-link:hover::after {
            width: 100%;
        }

        /* Buttons */
        .btn {
            border-radius: 8px;
            padding: 10px 25px;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .btn-primary {
            background-color: var(--green-bright);
            border-color: var(--green-bright);
            color: white;
        }

        .btn-primary:hover {
            background-color: var(--green-dark);
            border-color: var(--green-dark);
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(43, 196, 68, 0.2);
        }

        .btn-light {
            color: var(--green-dark);
            background-color: var(--white-gray);
            border-color: var(--white-gray);
            font-weight: 600;
        }
        
        .btn-light:hover {
            background-color: var(--white);
            color: var(--green-bright);
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(220, 220, 220, 0.2);
        }

        /* Video section */
        .video-container {
            background-color: var(--white);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            margin-bottom: 30px;
            transition: all 0.3s ease;
        }
        
        .video-container:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }

        .video-player {
            width: 100%;
            aspect-ratio: 16 / 9;
            border-radius: 12px 12px 0 0; /* Ensure this doesn't conflict with player's own styling */
            overflow: hidden;
        }

        /* vidstack applies its own radius, so this might not be strictly needed if layout applies it */
        .plyr--video { 
            border-radius: 12px 12px 0 0;
            overflow: hidden;
        }


        .video-details {
            padding: 20px;
        }

        .video-title {
            font-weight: 700;
            margin-bottom: 10px;
            font-size: 1.25rem;
        }

        .video-meta {
            display: flex;
            align-items: center;
            margin-bottom: 15px;
            color: var(--dark-gray);
        }

        .video-meta i {
            color: var(--green-bright);
            margin-right: 5px;
        }

        .video-meta span {
            margin-right: 15px;
        }

        /* Course navigation */
        .course-sidebar {
            background-color: var(--white);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            /*
			position: sticky;
            top: 100px;
			*/
		}

        .course-header {
            background-color: var(--green-bright);
            color: white;
            padding: 20px;
            border-radius: 12px 12px 0 0;
        }

        .course-header h3 {
            margin-bottom: 0;
            font-size: 1.25rem;
        }

        .course-sections {
            padding: 20px;
        }

        .section-item {
            display: flex;
            align-items: center;
            padding: 12px 15px;
            border-radius: 8px;
            margin-bottom: 10px;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .section-item:hover {
            background-color: var(--green-pale);
        }

        .section-item.active {
            background-color: var(--green-pale);
            font-weight: 600;
        }

        .section-item i {
            margin-right: 10px;
            color: var(--green-bright);
        }

        .section-title {
            flex: 1;
        }

        .section-duration {
            color: var(--dark-gray);
            font-size: 0.9rem;
        }

        /* Locked item */
        .section-item.locked {
            opacity: 0.7;
            cursor: not-allowed;
        }

        .section-item.locked i {
            color: var(--dark-gray);
        }

        /* Notes section */
        .notes-container {
            background-color: var(--white);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            margin-top: 30px;
        }

        .notes-header {
            background-color: var(--green-pale);
            padding: 15px 20px;
            border-radius: 12px 12px 0 0;
        }

        .notes-header h4 {
            margin-bottom: 0;
            color: var(--dark-gray);
        }

        .notes-content {
            padding: 20px;
        }

        .notes-textarea {
            width: 100%;
            min-height: 150px;
            border: 1px solid var(--white-gray);
            border-radius: 8px;
            padding: 15px;
            margin-bottom: 15px;
            resize: vertical;
        }

        .notes-textarea:focus {
            border-color: var(--green-bright);
            outline: none;
            box-shadow: 0 0 0 3px rgba(43, 196, 68, 0.1);
        }

        /* Login Modal */
        .auth-modal .modal-content {
            border-radius: 12px;
            overflow: hidden;
            border: none;
        }

        .auth-modal .modal-header {
            background-color: var(--green-bright);
            color: white;
            border: none;
        }

        .auth-modal .modal-body {
            padding: 30px;
        }

        .auth-form-group {
            margin-bottom: 20px;
        }

        .auth-form-group label {
            font-weight: 600;
            margin-bottom: 8px;
            display: block;
        }

        .auth-form-group input {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--white-gray);
            border-radius: 8px;
        }

        .auth-form-group input:focus {
            border-color: var(--green-bright);
            outline: none;
            box-shadow: 0 0 0 3px rgba(43, 196, 68, 0.1);
        }

        /* Progress section */
        .progress-container {
            background-color: var(--white);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            padding: 20px;
            margin-bottom: 30px;
        }

        .progress-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 15px;
        }

        .progress-title {
            font-weight: 700;
            margin-bottom: 0;
        }

        .progress-percentage {
            font-weight: 600;
            color: var(--green-bright);
        }

        .progress-bar-container {
            height: 10px;
            background-color: var(--white-gray);
            border-radius: 5px;
            overflow: hidden;
        }

        .progress-bar-fill {
            height: 100%;
            background-color: var(--green-bright);
            border-radius: 5px;
            width: 35%; /* This should be dynamically updated */
        }

        /* Footer */
        footer {
            background-color: var(--white-gray);
            padding: 30px 0;
            margin-top: 60px;
            color: var(--dark-gray);
        }
        
        .footer-brand {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--green-dark);
        }
        
        .footer-links h5 {
            font-size: 1.1rem;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
            color: var(--dark-gray);
        }
        
        .footer-links h5::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 2px;
            background-color: var(--green-bright);
        }
        
        .footer-links ul {
            list-style-type: none;
            padding: 0;
        }
        
        .footer-links ul li {
            margin-bottom: 10px;
        }
        
        .footer-links ul li a {
            color: var(--dark-gray);
            text-decoration: none;
            transition: all 0.3s ease;
        }
        
        .footer-links ul li a:hover {
            color: var(--green-bright);
            padding-left: 5px;
        }
        
        .copyright {
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid #ddd;
            font-size: 14px;
            color: var(--dark-gray);
            text-align: center;
        }

        /* Responsive styles */
        @media (max-width: 991px) {
            .course-sidebar {
                margin-top: 30px;
                position: static;
            }
        }

        @media (max-width: 768px) {
            body {
                padding-top: 60px;
            }
            
            .video-container {
                margin-bottom: 20px;
            }
            
            .course-header h3 {
                font-size: 1.1rem;
            }
            
            .section-item {
                padding: 10px;
            }
        }