:root {
            --primary: #0f766e;
            --primary-dark: #115e59;
            --primary-light: #14b8a6;
            --accent: #f59e0b;
            --accent-hover: #d97706;
            --bg: #f8fafc;
            --bg-dark: #0f172a;
            --text: #1e293b;
            --text-light: #64748b;
            --white: #ffffff;
            --card: #ffffff;
            --border: #e2e8f0;
            --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
            --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
        }

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

        body {
            font-family: 'Inter', sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* Navigation */
        nav {
            position: fixed;
            top: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            padding: 1rem 0;
        }

        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: 700;
        }

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

        .nav-links a {
            text-decoration: none;
            color: var(--text);
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.3s;
        }

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

        .nav-cta {
            background: var(--primary);
            color: white;
            padding: 0.6rem 1.5rem;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all 0.3s;
            border: none;
            cursor: pointer;
        }

        .nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
        }

        /* Hero Section */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1e293b 100%);
            position: relative;
            overflow: hidden;
            padding-top: 80px;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 800px;
            height: 800px;
            background: radial-gradient(circle, var(--primary-light) 0%, transparent 70%);
            opacity: 0.15;
            animation: float 20s ease-in-out infinite;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
            opacity: 0.08;
            animation: float 25s ease-in-out infinite reverse;
        }

        @keyframes float {
            0%, 100% { transform: translate(0, 0) scale(1); }
            33% { transform: translate(30px, -30px) scale(1.05); }
            66% { transform: translate(-20px, 20px) scale(0.95); }
        }

        .hero-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .hero-content h1 {
            font-size: 3.5rem;
            font-weight: 800;
            color: white;
            line-height: 1.1;
            margin-bottom: 1.5rem;
        }

        .hero-content h1 span {
            color: var(--primary-light);
        }

        .hero-content p {
            font-size: 1.25rem;
            color: #94a3b8;
            margin-bottom: 2rem;
            max-width: 500px;
        }

        .hero-btns {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .btn-primary {
            background: var(--primary);
            color: white;
            padding: 1rem 2rem;
            border-radius: 12px;
            text-decoration: none;
            font-weight: 600;
            font-size: 1rem;
            transition: all 0.3s;
            display: inline-block;
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 10px 30px -10px var(--primary);
        }

        .btn-secondary {
            background: transparent;
            color: white;
            padding: 1rem 2rem;
            border-radius: 12px;
            text-decoration: none;
            font-weight: 600;
            font-size: 1rem;
            border: 2px solid rgba(255,255,255,0.2);
            transition: all 0.3s;
            display: inline-block;
        }

        .btn-secondary:hover {
            border-color: white;
            background: rgba(255,255,255,0.05);
        }

        .hero-visual {
            position: relative;
        }

        .hero-card {
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 20px;
            padding: 2rem;
            position: relative;
            overflow: hidden;
        }

        .hero-card-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1rem;
        }

        .mini-card {
            background: rgba(255, 255, 255, 0.08);
            border-radius: 12px;
            padding: 1.5rem;
            text-align: center;
            transition: all 0.3s;
        }

        .mini-card:hover {
            background: rgba(255, 255, 255, 0.12);
            transform: translateY(-4px);
        }

        .mini-card-icon {
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1rem;
            font-size: 1.5rem;
        }

        .mini-card h4 {
            color: white;
            font-size: 0.9rem;
            font-weight: 600;
        }

        .mini-card p {
            color: #94a3b8;
            font-size: 0.75rem;
            margin-top: 0.25rem;
        }

        /* About Section */
        .about {
            padding: 6rem 0;
            background: var(--bg);
        }

        .section-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
        }

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

        .section-tag {
            display: inline-block;
            background: rgba(15, 118, 110, 0.1);
            color: var(--primary);
            padding: 0.4rem 1rem;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 1rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .section-header h2 {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 1rem;
        }

        .section-header p {
            color: var(--text-light);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto;
        }

        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: center;
        }

        .about-image {
            position: relative;
        }

        .about-image-main {
            width: 100%;
            height: 400px;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            border-radius: 24px;
            position: relative;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .about-image-main::before {
            content: '📚';
            font-size: 8rem;
            opacity: 0.3;
        }

        .about-image-badge {
            position: absolute;
            bottom: -20px;
            right: -20px;
            background: var(--white);
            padding: 1.5rem;
            border-radius: 16px;
            box-shadow: var(--shadow-lg);
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .badge-icon {
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, var(--accent), #fbbf24);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
        }

        .badge-text h4 {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text);
        }

        .badge-text p {
            color: var(--text-light);
            font-size: 0.85rem;
        }

        .about-content h3 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 1rem;
        }

        .about-content > p {
            color: var(--text-light);
            font-size: 1.1rem;
            margin-bottom: 2rem;
            line-height: 1.8;
        }

        .about-features {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .about-feature {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            padding: 1rem;
            background: var(--white);
            border-radius: 12px;
            border: 1px solid var(--border);
            transition: all 0.3s;
        }

        .about-feature:hover {
            box-shadow: var(--shadow);
            transform: translateX(4px);
            border-color: var(--primary-light);
        }

        .about-feature-icon {
            width: 40px;
            height: 40px;
            background: rgba(15, 118, 110, 0.1);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            flex-shrink: 0;
        }

        .about-feature h4 {
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.25rem;
        }

        .about-feature p {
            color: var(--text-light);
            font-size: 0.9rem;
        }

        /* Benefits Section */
        .benefits {
            padding: 6rem 0;
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }

        .benefits::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
        }

        .benefits .section-header h2,
        .benefits .section-header p {
            color: white;
        }

        .benefits .section-tag {
            background: rgba(255, 255, 255, 0.1);
            color: var(--primary-light);
        }

        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            position: relative;
            z-index: 1;
        }

        .benefit-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 20px;
            padding: 2rem;
            text-align: center;
            transition: all 0.3s;
            backdrop-filter: blur(10px);
        }

        .benefit-card:hover {
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-8px);
            border-color: var(--primary-light);
        }

        .benefit-icon {
            width: 64px;
            height: 64px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            font-size: 2rem;
            box-shadow: 0 10px 30px -10px var(--primary);
        }

        .benefit-card h3 {
            color: white;
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
        }

        .benefit-card p {
            color: #94a3b8;
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* Courses Section */
        .courses {
            padding: 6rem 0;
            background: var(--bg);
        }

        .courses-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }

        .course-card {
            background: var(--white);
            border-radius: 20px;
            overflow: hidden;
            border: 1px solid var(--border);
            transition: all 0.3s;
            position: relative;
        }

        .course-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }

        .course-image {
            height: 180px;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }

        .course-image::before {
            content: '';
            position: absolute;
            width: 200%;
            height: 200%;
            background: repeating-linear-gradient(
                45deg,
                transparent,
                transparent 10px,
                rgba(255,255,255,0.03) 10px,
                rgba(255,255,255,0.03) 20px
            );
            animation: slide 20s linear infinite;
        }

        @keyframes slide {
            0% { transform: translate(0, 0); }
            100% { transform: translate(-50px, -50px); }
        }

        .course-image-icon {
            font-size: 3rem;
            position: relative;
            z-index: 1;
        }

        .course-badge {
            position: absolute;
            top: 1rem;
            right: 1rem;
            background: var(--accent);
            color: white;
            padding: 0.3rem 0.8rem;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 700;
            z-index: 1;
        }

        .course-content {
            padding: 1.5rem;
        }

        .course-content h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.5rem;
        }

        .course-content p {
            color: var(--text-light);
            font-size: 0.9rem;
            margin-bottom: 1rem;
        }

        .course-meta {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding-top: 1rem;
            border-top: 1px solid var(--border);
        }

        .course-meta span {
            display: flex;
            align-items: center;
            gap: 0.3rem;
            color: var(--text-light);
            font-size: 0.8rem;
        }

        .course-btn {
            display: block;
            width: 100%;
            padding: 0.75rem;
            background: var(--bg);
            border: none;
            border-radius: 10px;
            color: var(--primary);
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all 0.3s;
            margin-top: 1rem;
            font-family: inherit;
        }

        .course-btn:hover {
            background: var(--primary);
            color: white;
        }

        /* Testimonials Section */
        .testimonials {
            padding: 6rem 0;
            background: linear-gradient(135deg, #f1f5f9 0%, var(--bg) 100%);
        }

        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 2rem;
            max-width: 900px;
            margin: 0 auto;
        }

        .testimonial-card {
            background: var(--white);
            border-radius: 20px;
            padding: 2rem;
            border: 1px solid var(--border);
            position: relative;
            transition: all 0.3s;
        }

        .testimonial-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }

        .testimonial-quote {
            font-size: 3rem;
            color: var(--primary-light);
            line-height: 1;
            margin-bottom: 0.5rem;
            opacity: 0.5;
        }

        .testimonial-text {
            font-size: 1.1rem;
            color: var(--text);
            font-style: italic;
            margin-bottom: 1.5rem;
            line-height: 1.7;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .author-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: 700;
            font-size: 1.2rem;
        }

        .author-info h4 {
            font-weight: 700;
            color: var(--text);
        }

        .author-info p {
            color: var(--text-light);
            font-size: 0.85rem;
        }

        .testimonial-rating {
            position: absolute;
            top: 2rem;
            right: 2rem;
            color: var(--accent);
            font-size: 1.2rem;
        }

        /* CTA Section */
        .cta {
            padding: 5rem 0;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            position: relative;
            overflow: hidden;
        }

        .cta::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
        }

        .cta-container {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 0 2rem;
        }

        .cta h2 {
            font-size: 2.5rem;
            font-weight: 800;
            color: white;
            margin-bottom: 1rem;
        }

        .cta p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.1rem;
            margin-bottom: 2rem;
        }

        .cta-btn {
            background: white;
            color: var(--primary);
            padding: 1rem 2.5rem;
            border-radius: 12px;
            text-decoration: none;
            font-weight: 700;
            font-size: 1rem;
            transition: all 0.3s;
            display: inline-block;
            border: none;
            cursor: pointer;
        }

        .cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 30px -10px rgba(0,0,0,0.3);
        }

        /* Footer */
        footer {
            background: var(--bg-dark);
            color: #94a3b8;
            padding: 3rem 0 1.5rem;
        }

        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
            display: grid;
            grid-template-columns: 3fr 2fr 1fr;
            gap: 3rem;
            margin-bottom: 3rem;
        }

        .footer-brand {
            max-width: 300px;
        }

        .footer-brand .logo {
            margin-bottom: 1rem;
            color: white;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
        }

        .footer-column h4 {
            color: white;
            font-weight: 600;
            margin-bottom: 1rem;
            font-size: 0.95rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

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

        .footer-column li {
            margin-bottom: 0.5rem;
        }

        .footer-column a {
            color: #94a3b8;
            text-decoration: none;
            font-size: 0.9rem;
            transition: color 0.3s;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 1.5rem;
            text-align: center;
            font-size: 0.85rem;
        }

        /* Mobile Menu Toggle */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text);
            font-size: 1.5rem;
            cursor: pointer;
        }

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

            .hero-content p {
                margin: 0 auto 2rem;
            }

            .hero-btns {
                justify-content: center;
            }

            .hero-visual {
                order: -1;
                max-width: 500px;
                margin: 0 auto;
            }

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

            .about-image {
                max-width: 500px;
                margin: 0 auto;
            }

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

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

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

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

            .menu-toggle {
                display: block;
            }

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

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

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

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

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

            .footer-brand {
                max-width: 100%;
            }

            .section-header h2 {
                font-size: 2rem;
            }
        }

        /* Smooth scroll */
        html {
            scroll-behavior: smooth;
        }

        /* Animation on scroll */
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.6s ease-out;
        }

        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }