body {
            box-sizing: border-box;
            font-family: 'Inter', sans-serif;
        }
        
        .font-poppins { font-family: 'Poppins', sans-serif; }
        
        .hero-bg {
            background: linear-gradient(135deg, rgba(74, 144, 226, 0.9) 0%, rgba(80, 227, 194, 0.9) 100%),
                        url('https://images.unsplash.com/photo-1522202176988-66273c2fd55f?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
        }
        
        .page {
            display: none;
        }
        
        .page.active {
            display: block;
        }
        
        .card-hover {
            transition: all 0.3s ease;
        }
        
        .card-hover:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
        }
        
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            animation: fadeInUp 0.8s ease forwards;
        }
        
        .fade-in-delay-1 { animation-delay: 0.2s; }
        .fade-in-delay-2 { animation-delay: 0.4s; }
        .fade-in-delay-3 { animation-delay: 0.6s; }
        
        @keyframes fadeInUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        .pulse-glow {
            animation: pulseGlow 2s infinite;
        }
        
        @keyframes pulseGlow {
            0%, 100% { box-shadow: 0 0 20px rgba(248, 231, 28, 0.3); }
            50% { box-shadow: 0 0 30px rgba(248, 231, 28, 0.6); }
        }
        
        .chatbot-float {
            position: fixed;
            bottom: 20px;
            right: 20px;
            z-index: 1000;
        }
        
        .chat-window {
            display: none;
            position: fixed;
            bottom: 90px;
            right: 20px;
            width: 350px;
            height: 450px;
            z-index: 1001;
            animation: slideInUp 0.3s ease;
        }
        
        @keyframes slideInUp {
            from { transform: translateY(20px); opacity: 0; }
            to { transform: translateY(0); opacity: 1; }
        }
        
        .typing-indicator {
            display: none;
        }
        
        .typing-indicator span {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #4A90E2;
            margin: 0 2px;
            animation: typing 1.4s infinite;
        }
        
        .typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
        .typing-indicator span:nth-child(3) { animation-delay: 0.4s; }
        
        @keyframes typing {
            0%, 60%, 100% { transform: translateY(0); }
            30% { transform: translateY(-10px); }
        }
        
        .progress-bar {
            transition: width 1s ease-in-out;
        }
        
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.5);
            z-index: 2000;
        }
        
        .modal-content {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: white;
            border-radius: 12px;
            padding: 2rem;
            width: 90%;
            max-width: 400px;
            animation: modalSlideIn 0.3s ease;
        }
        
        @keyframes modalSlideIn {
            from { transform: translate(-50%, -60%); opacity: 0; }
            to { transform: translate(-50%, -50%); opacity: 1; }
        }
        
        .nav-link {
            transition: color 0.3s ease;
            cursor: pointer;
        }
        
        .nav-link:hover {
            color: #4A90E2;
        }
        
        .nav-link.active {
            color: #4A90E2;
            font-weight: 600;
        }
        
        .btn-primary {
            background: linear-gradient(135deg, #4A90E2, #50E3C2);
            transition: all 0.3s ease;
        }
        
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(74, 144, 226, 0.3);
        }
        
        .course-card {
            background: white;
            border-radius: 12px;
            overflow: hidden;
            transition: all 0.3s ease;
        }
        
        .course-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.1);
        }
        
        .dashboard-card {
            background: white;
            border-radius: 16px;
            padding: 1.5rem;
            box-shadow: 0 4px 20px rgba(0,0,0,0.08);
            transition: all 0.3s ease;
        }
        
        .dashboard-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(0,0,0,0.12);
        }
        
        .course-image {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        
        .blog-image {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        
        .about-image {
            width: 100%;
            height: 400px;
            object-fit: cover;
            border-radius: 12px;
        }