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

        :root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --secondary: #ec4899;
            --accent: #06b6d4;
            --dark: #0f172a;
            --light: #f8fafc;
            --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
            --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
        }

        body {
            font-family: 'Hind Siliguri', sans-serif;
            background: var(--dark);
            color: var(--light);
            overflow-x: hidden;
            line-height: 1.6;
        }

        /* Animated Background */
        .bg-animation {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            background: 
                radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(236, 72, 153, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 40% 20%, rgba(6, 182, 212, 0.15) 0%, transparent 50%);
            animation: bgPulse 4s ease-in-out infinite;
        }

        @keyframes bgPulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.7; }
        }

        /* Navigation */
        nav {
            position: fixed;
            top: 0;
            width: 100%;
            padding: 1rem 5%;
            background: rgba(15, 23, 42, 0.8);
            backdrop-filter: blur(20px);
            z-index: 1000;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            transition: all 0.3s ease;
        }

        nav.scrolled {
            padding: 0.5rem 5%;
            background: rgba(15, 23, 42, 0.95);
        }

        .nav-container {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            background: var(--gradient-1);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .nav-links {
            display: flex;
            gap: 2rem;
            list-style: none;
        }

        .nav-links a {
            color: var(--light);
            text-decoration: none;
            font-weight: 500;
            position: relative;
            padding: 0.5rem 0;
            transition: color 0.3s;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--gradient-2);
            transition: width 0.3s;
        }

        .nav-links a:hover::after {
            width: 100%;
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--light);
            font-size: 1.5rem;
            cursor: pointer;
        }

        /* Hero Section */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 8rem 5% 4rem;
            position: relative;
            overflow: hidden;
        }

        .hero-content {
            max-width: 1400px;
            width: 100%;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: center;
        }

        .hero-text h1 {
            font-size: 3.5rem;
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 1.5rem;
            background: linear-gradient(to right, #fff, #a5b4fc);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-text p {
            font-size: 1.25rem;
            color: #94a3b8;
            margin-bottom: 2rem;
            max-width: 600px;
        }

        .cta-buttons {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .btn {
            padding: 1rem 2rem;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            border: none;
            cursor: pointer;
            font-size: 1rem;
            font-family: inherit;
        }

        .btn-primary {
            background: var(--gradient-1);
            color: white;
            box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 40px rgba(99, 102, 241, 0.4);
        }

        .btn-secondary {
            background: transparent;
            color: white;
            border: 2px solid rgba(255,255,255,0.2);
        }

        .btn-secondary:hover {
            background: rgba(255,255,255,0.1);
            border-color: rgba(255,255,255,0.4);
        }

        /* Hero Visual */
        .hero-visual {
            position: relative;
            height: 500px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .code-window {
            background: rgba(30, 41, 59, 0.8);
            border-radius: 20px;
            padding: 2rem;
            width: 100%;
            max-width: 500px;
            border: 1px solid rgba(255,255,255,0.1);
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
            backdrop-filter: blur(10px);
            transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
            transition: transform 0.3s;
        }

        .code-window:hover {
            transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
        }

        .window-header {
            display: flex;
            gap: 0.5rem;
            margin-bottom: 1rem;
        }

        .dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
        }

        .dot-red { background: #ef4444; }
        .dot-yellow { background: #eab308; }
        .dot-green { background: #22c55e; }

        .code-content {
            font-family: 'Courier New', monospace;
            font-size: 0.9rem;
            line-height: 1.8;
            color: #e2e8f0;
        }

        .code-content .keyword { color: #c084fc; }
        .code-content .function { color: #60a5fa; }
        .code-content .string { color: #4ade80; }
        .code-content .comment { color: #64748b; }

        /* Floating Cards */
        .floating-card {
            position: absolute;
            background: rgba(255,255,255,0.1);
            backdrop-filter: blur(10px);
            padding: 1rem 1.5rem;
            border-radius: 15px;
            border: 1px solid rgba(255,255,255,0.2);
            animation: float 6s ease-in-out infinite;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-weight: 600;
        }

        .card-1 { top: 10%; right: -20px; animation-delay: 0s; }
        .card-2 { bottom: 20%; left: -30px; animation-delay: 2s; }
        .card-3 { top: 50%; right: -40px; animation-delay: 4s; }

        @keyframes float {
            0%, 100% { transform: translateY(0px); }
            50% { transform: translateY(-20px); }
        }

        /* Courses Section */
        .courses {
            padding: 6rem 5%;
            position: relative;
        }

        .section-header {
            text-align: center;
            margin-bottom: 4rem;
        }

        .section-header h2 {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            background: var(--gradient-2);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .section-header p {
            color: #94a3b8;
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto;
        }

        .courses-grid {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }

        .course-card {
            background: rgba(30, 41, 59, 0.6);
            border: 1px solid rgba(255,255,255,0.1);
            border-radius: 20px;
            padding: 2rem;
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
            cursor: pointer;
            text-decoration: none;
            color: inherit;
            display: block;
        }

        .course-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--gradient-1);
            opacity: 0;
            transition: opacity 0.3s;
            z-index: 0;
        }

        .course-card:hover::before {
            opacity: 0.1;
        }

        .course-card:hover {
            transform: translateY(-10px);
            border-color: var(--primary);
            box-shadow: 0 20px 40px rgba(99, 102, 241, 0.2);
        }

        .course-icon {
            width: 60px;
            height: 60px;
            background: var(--gradient-1);
            border-radius: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
            position: relative;
            z-index: 1;
        }

        .course-card h3 {
            font-size: 1.5rem;
            margin-bottom: 0.5rem;
            position: relative;
            z-index: 1;
        }

        .course-card p {
            color: #94a3b8;
            margin-bottom: 1.5rem;
            position: relative;
            z-index: 1;
        }

        .course-meta {
            display: flex;
            gap: 1rem;
            font-size: 0.9rem;
            color: #64748b;
            position: relative;
            z-index: 1;
        }

        .course-meta span {
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }

        /* Features Section */
        .features {
            padding: 6rem 5%;
            background: rgba(15, 23, 42, 0.5);
        }

        .features-grid {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
        }

        .feature-item {
            text-align: center;
            padding: 2rem;
        }

        .feature-icon {
            width: 80px;
            height: 80px;
            background: rgba(99, 102, 241, 0.2);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            font-size: 2rem;
            color: var(--primary);
            border: 2px solid rgba(99, 102, 241, 0.3);
            transition: all 0.3s;
        }

        .feature-item:hover .feature-icon {
            background: var(--primary);
            color: white;
            transform: rotateY(360deg);
        }

        .feature-item h3 {
            font-size: 1.3rem;
            margin-bottom: 0.5rem;
        }

        .feature-item p {
            color: #94a3b8;
        }

        /* Stats Section */
        .stats {
            padding: 4rem 5%;
            position: relative;
        }

        .stats-container {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            background: rgba(30, 41, 59, 0.8);
            padding: 3rem;
            border-radius: 30px;
            border: 1px solid rgba(255,255,255,0.1);
            backdrop-filter: blur(10px);
        }

        .stat-item {
            text-align: center;
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            background: var(--gradient-3);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 0.5rem;
        }

        .stat-label {
            color: #94a3b8;
            font-size: 0.9rem;
        }

        /* Footer */
        footer {
            background: rgba(15, 23, 42, 0.9);
            border-top: 1px solid rgba(255,255,255,0.1);
            padding: 4rem 5% 2rem;
            margin-top: 4rem;
        }

        .footer-content {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 3rem;
            margin-bottom: 3rem;
        }

        .footer-brand h3 {
            font-size: 1.8rem;
            margin-bottom: 1rem;
            background: var(--gradient-1);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .footer-brand p {
            color: #94a3b8;
            margin-bottom: 1.5rem;
        }

        .social-links {
            display: flex;
            gap: 1rem;
        }

        .social-links a {
            width: 40px;
            height: 40px;
            background: rgba(255,255,255,0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            text-decoration: none;
            transition: all 0.3s;
        }

        .social-links a:hover {
            background: var(--primary);
            transform: translateY(-3px);
        }

        .footer-links h4 {
            margin-bottom: 1.5rem;
            color: white;
        }

        .footer-links ul {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 0.75rem;
        }

        .footer-links a {
            color: #94a3b8;
            text-decoration: none;
            transition: color 0.3s;
        }

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

        .footer-bottom {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #64748b;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-content {
                grid-template-columns: 1fr;
                text-align: center;
            }

            .hero-text h1 {
                font-size: 2.5rem;
            }

            .hero-visual {
                order: -1;
                height: 400px;
            }

            .code-window {
                transform: none;
            }

            .floating-card {
                display: none;
            }

            .stats-container {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-content {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .mobile-menu-btn {
                display: block;
            }

            .hero-text h1 {
                font-size: 2rem;
            }

            .courses-grid {
                grid-template-columns: 1fr;
            }

            .stats-container {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

            .footer-content {
                grid-template-columns: 1fr;
                text-align: center;
            }

            .social-links {
                justify-content: center;
            }
        }

        /* Scroll Animation */
        .scroll-reveal {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.8s ease;
        }

        .scroll-reveal.active {
            opacity: 1;
            transform: translateY(0);
        }

        /* Loading Animation */
        .loader {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--dark);
            z-index: 9999;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: opacity 0.5s;
        }

        .loader.hidden {
            opacity: 0;
            pointer-events: none;
        }

        .loader-spinner {
            width: 50px;
            height: 50px;
            border: 3px solid rgba(99, 102, 241, 0.3);
            border-top-color: var(--primary);
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }