:root {
            --primary-color: #005BAC; 
            --secondary-color: #FFCC00;
            --accent-color: #E30613;
            --dark-color: #2d3436;
            --light-color: #f8f9fa;
            --gradient: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            color: var(--dark-color);
            overflow-x: hidden;
        }

        /* Navigation */
        .navbar {
            background-color: var(--secondary-color) !important;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
        }

        .navbar-brand {
            cursor: pointer;
        }

        .navbar-brand img {
            height: 40px;
            transition: transform 0.3s ease;
        }

        .navbar-brand:hover img {
            transform: scale(1.05);
        }

        .navbar-nav .nav-link {
            color: var(--dark-color) !important;
            font-weight: 600;
            margin: 0 10px;
            transition: color 0.3s ease;
        }

        .navbar-nav .nav-link:hover {
            color: var(--primary-color) !important;
        }

        .btn-subscribe {
            background: var(--gradient);
            color: white;
            border: none;
            border-radius: 30px;
            padding: 8px 20px;
            font-weight: 600;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .btn-subscribe:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 91, 172, 0.4);
            color: white;
        }

        /* Hero Section with Carousel */
        .hero {
            position: relative;
            color: white;
            padding: 0;
        }

        .carousel-item {
            height: 600px;
            position: relative;
        }

        .carousel-item img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .carousel-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, rgba(0, 91, 172, 0.8), rgba(255, 204, 0, 0.8));
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .carousel-caption {
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
        }

        .carousel-caption h1 {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 20px;
            animation: fadeInUp 1s ease;
        }

        .carousel-caption p {
            font-size: 1.25rem;
            margin-bottom: 30px;
            animation: fadeInUp 1s ease 0.2s;
            animation-fill-mode: both;
        }

        .btn-hero {
            background: white;
            color: var(--primary-color);
            border: none;
            border-radius: 30px;
            padding: 12px 30px;
            font-weight: 600;
            font-size: 1.1rem;
            margin: 0 10px;
            transition: all 0.3s ease;
            animation: fadeInUp 1s ease 0.4s;
            animation-fill-mode: both;
        }

        .btn-hero:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
            color: var(--primary-color);
        }

        .btn-outline-hero {
            background: transparent;
            color: white;
            border: 2px solid white;
            border-radius: 30px;
            padding: 12px 30px;
            font-weight: 600;
            font-size: 1.1rem;
            margin: 0 10px;
            transition: all 0.3s ease;
            animation: fadeInUp 1s ease 0.4s;
            animation-fill-mode: both;
        }

        .btn-outline-hero:hover {
            background: white;
            color: var(--primary-color);
            transform: translateY(-3px);
        }

        /* Features Section */
        .features {
            padding: 80px 0;
        }

        .section-title {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-title h2 {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 15px;
        }

        .section-title p {
            font-size: 1.1rem;
            color: #6c757d;
            max-width: 700px;
            margin: 0 auto;
        }

        .feature-card {
            background: white;
            border-radius: 10px;
            padding: 30px;
            text-align: center;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
        }

        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }

        .feature-icon {
            font-size: 3rem;
            color: var(--secondary-color);
            margin-bottom: 20px;
        }

        .feature-card h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 15px;
            color: var(--dark-color);
        }

        .feature-card p {
            color: #6c757d;
        }

        /* Categories Page */
        .categories-page {
            display: none;
            padding: 80px 0;
            background-color: #f8f9fa;
            min-height: 100vh;
        }

        .category-card {
            position: relative;
            border-radius: 10px;
            overflow: hidden;
            height: 250px;
            margin-bottom: 30px;
            cursor: pointer;
            transition: transform 0.3s ease;
        }

        .category-card:hover {
            transform: scale(1.03);
        }

        .category-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .category-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 20px;
            color: white;
        }

        .category-overlay h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 5px;
        }

        .category-overlay p {
            font-size: 0.9rem;
            opacity: 0.8;
        }

        /* How It Works Page */
        .how-it-works-page {
            display: none;
            padding: 80px 0;
            min-height: 100vh;
        }

        .step {
            text-align: center;
            margin-bottom: 40px;
        }

        .step-number {
            width: 60px;
            height: 60px;
            background: var(--gradient);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 700;
            margin: 0 auto 20px;
        }

        .step h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 15px;
            color: var(--dark-color);
        }

        .step p {
            color: #6c757d;
            max-width: 300px;
            margin: 0 auto;
        }

        /* Testimonials Page */
        .testimonials-page {
            display: none;
            padding: 80px 0;
            background-color: #f8f9fa;
            min-height: 100vh;
        }

        .testimonial-card {
            background: white;
            border-radius: 10px;
            padding: 30px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            height: 100%;
        }

        .testimonial-text {
            font-style: italic;
            color: #6c757d;
            margin-bottom: 20px;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
        }

        .author-img {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            margin-right: 15px;
            object-fit: cover;
        }

        .author-info h4 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 0;
        }

        .author-info p {
            font-size: 0.9rem;
            color: #6c757d;
            margin-bottom: 0;
        }

        /* Footer */
        footer {
            background: var(--dark-color);
            color: white;
            padding: 60px 0 20px;
        }

        .footer-logo {
            margin-bottom: 20px;
        }

        .footer-logo a {
            display: inline-block;
        }

        .footer-logo img {
            height: 40px;
            transition: transform 0.3s ease;
        }

        .footer-logo img:hover {
            transform: scale(1.05);
        }

        .footer-links {
            list-style: none;
            padding: 0;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: #adb5bd;
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .footer-links a:hover {
            color: var(--secondary-color);
        }

        .social-icons a {
            display: inline-block;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            color: white;
            border-radius: 50%;
            text-align: center;
            line-height: 40px;
            margin-right: 10px;
            transition: all 0.3s ease;
        }

        .social-icons a:hover {
            background: var(--secondary-color);
            transform: translateY(-3px);
        }

        .copyright {
            text-align: center;
            padding-top: 30px;
            margin-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #adb5bd;
            font-size: 0.9rem;
        }

        /* Login and Signup Pages */
        .auth-page {
            display: none;
            min-height: 100vh;
            background: linear-gradient(135deg, rgba(0, 91, 172, 0.9), rgba(255, 204, 0, 0.9));
            padding: 80px 0;
        }

        .auth-container {
            max-width: 400px;
            margin: 0 auto;
            background: white;
            border-radius: 15px;
            padding: 40px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }

        .auth-header {
            text-align: center;
            margin-bottom: 30px;
        }

        .auth-header a {
            display: inline-block;
        }

        .auth-header img {
            height: 50px;
            margin-bottom: 20px;
            transition: transform 0.3s ease;
        }

        .auth-header img:hover {
            transform: scale(1.05);
        }

        .auth-header h2 {
            color: var(--primary-color);
            font-weight: 700;
        }

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

        .form-group label {
            color: var(--dark-color);
            font-weight: 500;
            margin-bottom: 5px;
        }

        .form-control {
            border: 1px solid #ddd;
            border-radius: 8px;
            padding: 12px 15px;
            font-size: 1rem;
            transition: border-color 0.3s ease;
        }

        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.2rem rgba(0, 91, 172, 0.25);
        }

        .btn-auth {
            background: var(--gradient);
            color: white;
            border: none;
            border-radius: 30px;
            padding: 12px 30px;
            font-weight: 600;
            width: 100%;
            transition: all 0.3s ease;
        }

        .btn-auth:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 91, 172, 0.4);
            color: white;
        }

        .auth-footer {
            text-align: center;
            margin-top: 20px;
        }

        .auth-footer a {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 500;
        }

        .auth-footer a:hover {
            text-decoration: underline;
        }

        /* Dashboard Styles */
        .dashboard {
            display: none;
            background-color: #f8f9fa;
            min-height: 100vh;
        }

        .dashboard-header {
            background: white;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            padding: 15px 0;
        }

        .user-menu {
            display: flex;
            align-items: center;
        }

        .user-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            margin-right: 10px;
        }

        .dashboard-sidebar {
            background: white;
            height: calc(100vh - 70px);
            box-shadow: 2px 0 10px rgba(0, 0, 0, 0.05);
            padding: 20px 0;
            position: fixed;
            width: 250px;
            overflow-y: auto;
        }

        .sidebar-menu {
            list-style: none;
            padding: 0;
        }

        .sidebar-menu li {
            padding: 15px 25px;
            border-left: 3px solid transparent;
            transition: all 0.3s ease;
        }

        .sidebar-menu li:hover, .sidebar-menu li.active {
            background: rgba(0, 91, 172, 0.05);
            border-left-color: var(--primary-color);
        }

        .sidebar-menu a {
            color: var(--dark-color);
            text-decoration: none;
            display: flex;
            align-items: center;
        }

        .sidebar-menu i {
            margin-right: 10px;
            color: var(--secondary-color);
        }

        .dashboard-content {
            margin-left: 250px;
            padding: 30px;
        }

        .content-card {
            background: white;
            border-radius: 10px;
            padding: 25px;
            margin-bottom: 30px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }

        .content-card h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 20px;
            color: var(--dark-color);
        }

        .video-card {
            border-radius: 10px;
            overflow: hidden;
            margin-bottom: 20px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s ease;
            cursor: pointer;
        }

        .video-card:hover {
            transform: translateY(-5px);
        }

        .video-thumbnail {
            position: relative;
            height: 180px;
            overflow: hidden;
        }

        .video-thumbnail img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .video-duration {
            position: absolute;
            bottom: 10px;
            right: 10px;
            background: rgba(0, 0, 0, 0.7);
            color: white;
            padding: 3px 8px;
            border-radius: 4px;
            font-size: 0.8rem;
        }

        .video-info {
            padding: 15px;
        }

        .video-title {
            font-weight: 600;
            margin-bottom: 5px;
            color: var(--dark-color);
        }

        .video-meta {
            display: flex;
            justify-content: space-between;
            color: #6c757d;
            font-size: 0.9rem;
        }

        .leaderboard-card {
            background: white;
            border-radius: 10px;
            padding: 25px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }

        .leaderboard-item {
            display: flex;
            align-items: center;
            padding: 15px 0;
            border-bottom: 1px solid #eee;
        }

        .leaderboard-item:last-child {
            border-bottom: none;
        }

        .leaderboard-rank {
            width: 30px;
            height: 30px;
            background: #f8f9fa;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            margin-right: 15px;
        }

        .leaderboard-rank.top {
            background: var(--gradient);
            color: white;
        }

        .leaderboard-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            margin-right: 15px;
        }

        .leaderboard-info {
            flex-grow: 1;
        }

        .leaderboard-name {
            font-weight: 600;
            margin-bottom: 0;
        }

        .leaderboard-score {
            color: #6c757d;
            font-size: 0.9rem;
        }

        .leaderboard-points {
            font-weight: 600;
            color: var(--primary-color);
        }

        /* Animations */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* Responsive Styles */
        @media (max-width: 992px) {
            .carousel-caption h1 {
                font-size: 2.5rem;
            }
            
            .dashboard-sidebar {
                width: 200px;
            }
            
            .dashboard-content {
                margin-left: 200px;
            }
        }

        @media (max-width: 768px) {
            .carousel-item {
                height: 500px;
            }
            
            .carousel-caption h1 {
                font-size: 2rem;
            }
            
            .carousel-caption p {
                font-size: 1rem;
            }
            
            .btn-hero, .btn-outline-hero {
                display: block;
                width: 80%;
                margin: 10px auto;
            }
            
            .dashboard-sidebar {
                transform: translateX(-100%);
                transition: transform 0.3s ease;
                z-index: 1000;
            }
            
            .dashboard-sidebar.active {
                transform: translateX(0);
            }
            
            .dashboard-content {
                margin-left: 0;
            }
            
            .mobile-menu-toggle {
                display: block;
            }
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--dark-color);
        }