* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            background-color: #fff !important;
            font-family: "Poppins", sans-serif;
        }
        
         .header-title {
            font-size: 28px;
            font-weight: 700;
            color: #1e40af;
            margin-bottom: 15px;
            line-height: 1.2;
        }
        
        .header-subtitle {
            font-size: 16px;
            color: #6b7280;
            margin-bottom: 30px;
            line-height: 1.4;
        }
        
        .popular-badge {
            background: #C4C4C4;
            color: white;
            padding: 8px 20px;
            border-radius: 25px;
            font-size: 16px;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 15px;
        }
          /* Desktop view: 2 courses per row */
        @media (min-width: 768px) {
            .fundamentals-section {
                display: grid;
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .course-card {
                margin-bottom: 0;
            }
        }
        /* Mobile view: 1 course per row */
        @media (max-width: 767px) {
            .fundamentals-section {
                display: block;
            }
        }
        .game-controller {
            background-image: url(../img/Group.png);
            background-position: top right;
            background-repeat: no-repeat;
            padding: 20px;
        }
        
        .carousel-card {
            background: linear-gradient(135deg, #a855f7, #ec4899);
            border-radius: 20px;
            margin: 0 10px;
            position: relative;
            overflow: hidden;
            min-height: 250px;
        }
        
        .bottom-nav {
            width: 90%;
            margin: 0 auto;
            left: 0;
            right: 0;
            border-radius: 50px;
            display: flex;
            justify-content: space-around;
            align-items: center;
            padding: 15px 0;
            position: fixed;
            bottom: 0;
            background-color: white;
            border-top: 1px solid #e6e6e6;
            box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
            z-index: 1000;
        }
        
        .nav-icon {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-gray);
            text-decoration: none;
            padding: 8px 12px;
            border-radius: 20px;
            transition: all 0.3s ease;
            font-size: 14px;
            font-weight: 500;
        }

        .nav-icon.active {
            color: var(--primary-purple);
            background-color: rgba(99, 102, 241, 0.1);
        }

        .nav-icon img {
            width: 20px;
            height: 20px;
            object-fit: contain;
        }

        .nav-text {
            opacity: 0;
            max-width: 0;
            overflow: hidden;
            white-space: nowrap;
            transition: all 0.3s ease;
        }

        .nav-icon.active .nav-text {
            opacity: 1;
            max-width: 100px;
        }

        /* Media Query for smaller phones */
        @media (max-width: 767px) {
            .nav-icon {
                padding: 6px 8px;
                font-size: 13px;
            }
            
            .nav-icon img {
                width: 20px;
                height: 20px;
            }
        }

        @media (max-width: 350px) {
            .nav-icon {
                padding: 4px 6px;
                font-size: 12px;
                gap: 4px;
            }
            
            .nav-icon img {
                width: 18px;
                height: 18px;
            }
        }
        
        .card-duration {
            color: rgba(255, 255, 255, 0.8);
            font-size: 14px;
            margin-bottom: 10px;
        }
        
        .card-title {
            color: white;
            font-size: 16px;
            font-weight: 500;
            line-height: 1.3;
            position: relative;
            z-index: 2;
        }
        a{
            text-decoration: none;
        }
        
        .card-text {
            max-width: 300px;
            padding: 20px;
            opacity: 0.5;
            border-radius: 20px;
            background-color: #0A3875;
        }
        
        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: #1e40af;
            margin: 40px 0 20px 0;
        }
        
        .course-card {
            background: white;
            border-radius: 15px;
            padding: 0;
            margin-bottom: 20px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            overflow: hidden;
            cursor: pointer;
        }
        
        .course-content {
            padding: 15px;
            display: flex;
            align-items: center;
        }
        
        .course-icon {
            width: 60px;
            height: 60px;
            border-radius: 15px;
            margin-right: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: white;
            flex-shrink: 0;
        }
        
        .unity-icon {
            background: linear-gradient(135deg, #a855f7, #7c3aed);
        }
        
        .csharp-icon {
            background: linear-gradient(135deg, #3b82f6, #1d4ed8);
        }
        
        .course-info {
            flex: 1;
        }
        
        .course-title {
            font-size: 18px;
            font-weight: 600;
            color: #1e40af;
            margin-bottom: 8px;
            line-height: 1.3;
        }
        
        .course-details {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 8px;
        }
        
        .detail-badge {
            background-color: #e5e7eb;
            color: #6b7280;
            padding: 4px 12px;
            border-radius: 15px;
            font-size: 12px;
            font-weight: 500;
        }
        
        .course-duration {
            color: #6b7280;
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 5px;
        }
        
        .course-rating {
            background-color: #f97316;
            color: white;
            padding: 6px 12px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 5px;
        }
        
         .course-price {
            font-size: 16px;
            font-weight: 500;
            color: #1e40af;
        }
        
        .progress-bar {
            height: 4px;
            background-color: #e5e7eb;
            border-radius: 2px;
            margin-top: 10px;
            overflow: hidden;
        }
        
        .progress-fill {
            height: 100%;
            background: linear-gradient(90deg, #06b6d4, #0891b2);
            border-radius: 2px;
        }
        
        .popular-section {
            position: relative;
        }

        /* Popup Overlay */
        .popup-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.6);
            z-index: 9999;
            display: none;
            align-items: center;
            justify-content: center;
        }

        /* Popup Container */
        .popup-container {
            background: white;
            border-radius: 20px;
            width: 100%;
            max-width: 400px;
            position: relative;
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            animation: popupFadeIn 0.3s ease-out;
        }

        @keyframes popupFadeIn {
            from {
                opacity: 0;
                transform: scale(0.9);
            }
            to {
                opacity: 1;
                transform: scale(1);
            }
        }

        /* Close Button */
        .close-btn {
            position: absolute;
            top: 15px;
            right: 15px;
            background: none;
            border: none;
            font-size: 24px;
            color: #999;
            cursor: pointer;
            z-index: 10;
            width: 30px;
            height: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: color 0.2s;
        }

        .close-btn:hover {
            color: #333;
        }

        /* Popup Content */
        .popup-content {
            padding: 25px 25px 20px 25px;
        }

        .popup-title {
            font-size: 22px;
            font-weight: 600;
            color: #2c5aa0;
            margin-bottom: 10px;
            line-height: 1.3;
            padding-right: 30px;
        }

        .popup-description {
            color: #666;
            font-size: 14px;
            margin-bottom: 15px;
            line-height: 1.5;
        }

        .course-author {
            color: #2c5aa0;
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 15px;
        }

        /* Course Stats */
        .course-stats {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 20px;
        }

        .rating {
            display: flex;
            align-items: center;
            gap: 5px;
            color: white;
            background-color: #f97316;
            padding: 5px 10px;
            border-radius: 15px;
            font-size: 14px;
            font-weight: 500;
        }

        .stat-item {
            display: flex;
            align-items: center;
            gap: 5px;
            color: #999;
            font-size: 14px;
        }

        .stat-icon {
            width: 16px;
            height: 16px;
            opacity: 0.7;
        }
        #coursePopup{
            display: flex;
        }
        /* Course Image */
        .course-image-container {
            width: 100%;
            height: 200px;
            overflow: hidden;
            border-radius: 15px;
            margin-bottom: 20px;
        }

        .course-image {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* Pricing Section */
        .pricing-section {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 15px;
        }

        .price-info {
            display: flex;
            align-items: baseline;
            gap: 5px;
        }

        .price {
            font-size: 28px;
            font-weight: 700;
            color: #333;
        }

        .price-period {
            font-size: 16px;
            color: #666;
            font-weight: 400;
        }

        .reserve-btn {
            background: #4285f4;
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: 25px;
            font-weight: 600;
            font-size: 14px;
            cursor: pointer;
            transition: background-color 0.2s;
            white-space: nowrap;
        }

        .reserve-btn:hover {
            background: #3367d6;
        }

        .view-calendar-btn {
            width: 100%;
            display: block;
            text-align: center;
            background: transparent;
            border: 2px solid #ddd;
            color: #999;
            text-decoration: none;
            padding: 12px;
            border-radius: 25px;
            font-weight: 500;
            font-size: 14px;
            cursor: pointer;
            margin-top: 15px;
            transition: all 0.2s;
        }

        .view-calendar-btn:hover {
            border-color: #4285f4;
            color: #4285f4;
        }