/* CSS Reset */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        html {
            scroll-behavior: smooth;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.6;
            color: #2c3e50;
            background-color: #f8f9fa;
            overflow-x: hidden;
        }
        
        /* Professional Color Palette */
        :root {
            --primary: #2c3e50;
            --secondary: #34495e;
            --accent: #3498db;
            --light-accent: #e8f4fc;
            --light: #f8f9fa;
            --white: #ffffff;
            --gray: #95a5a6;
            --dark-gray: #7f8c8d;
            --success: #27ae60;
            --shadow: rgba(44, 62, 80, 0.1);
        }
        
        /* Enhanced Navigation Bar */
        .navbar {
            position: fixed;
            top: 0;
            width: 100%;
            background-color: var(--white);
            box-shadow: 0 4px 20px var(--shadow);
            z-index: 1000;
            padding: 1rem 0;
            transition: all 0.3s ease;
        }
        
        .navbar.scrolled {
            padding: 0.7rem 0;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
        }
        
        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 2rem;
        }
        
        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .logo-icon {
            color: var(--accent);
            font-size: 1.8rem;
        }
        
        /* Desktop Navigation */
        .nav-links {
            display: flex;
            list-style: none;
            gap: 2.5rem;
        }
        
        .nav-links a {
            text-decoration: none;
            color: var(--secondary);
            font-weight: 500;
            transition: all 0.3s ease;
            padding: 0.5rem 0;
            position: relative;
            font-size: 1rem;
        }
        
        .nav-links a:hover {
            color: var(--accent);
        }
        
        .nav-links a::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: 0;
            left: 0;
            background-color: var(--accent);
            transition: width 0.3s ease;
        }
        
        .nav-links a:hover::after {
            width: 100%;
        }
        
        .nav-links a.active {
            color: var(--accent);
        }
        
        .nav-links a.active::after {
            width: 100%;
        }
        
        /* Mobile Navigation */
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--primary);
            padding: 0.5rem;
            transition: transform 0.3s ease;
        }
        
        .mobile-menu-btn:hover {
            transform: rotate(90deg);
        }
        
        .mobile-nav {
            display: none;
            position: fixed;
            top: 70px;
            left: 0;
            width: 100%;
            background: var(--white);
            box-shadow: 0 10px 30px var(--shadow);
            padding: 1rem 0;
            z-index: 999;
            animation: slideDown 0.3s ease;
        }
        
        @keyframes slideDown {
            from {
                opacity: 0;
                transform: translateY(-20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        .mobile-nav-links {
            list-style: none;
            display: flex;
            flex-direction: column;
        }
        
        .mobile-nav-links li {
            border-bottom: 1px solid #eee;
        }
        
        .mobile-nav-links a {
            display: block;
            padding: 1rem 2rem;
            text-decoration: none;
            color: var(--secondary);
            font-weight: 500;
            transition: all 0.3s ease;
        }
        
        .mobile-nav-links a:hover {
            background: var(--light-accent);
            color: var(--accent);
            padding-left: 2.5rem;
        }
        
        .mobile-nav-links a.active {
            background: var(--light-accent);
            color: var(--accent);
            border-left: 4px solid var(--accent);
        }
        
        /* Hero Section - Professional Redesign */
        .hero {
            padding: 10rem 2rem 6rem;
            max-width: 1200px;
            margin: 0 auto;
            position: relative;
            overflow: hidden;
        }
        
        .hero::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 60%;
            height: 150%;
            background: linear-gradient(135deg, var(--light-accent) 0%, transparent 70%);
            border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
            z-index: -1;
        }
        
        .hero-content {
            display: flex;
            align-items: center;
            gap: 5rem;
        }
        
        .hero-text {
            flex: 1;
            animation: fadeInUp 0.8s ease;
        }
        
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        .hero-image {
            flex: 1;
            display: flex;
            justify-content: center;
            align-items: center;
            animation: fadeIn 1s ease 0.3s both;
        }
        
        .book-cover {
            width: 100%;
            max-width: 380px;
            border-radius: 12px;
            box-shadow: 0 20px 40px rgba(52, 152, 219, 0.15),
                        0 10px 20px rgba(44, 62, 80, 0.1);
            transition: all 0.4s ease;
            position: relative;
            overflow: hidden;
        }
        
        .book-cover::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(45deg, transparent 50%, rgba(255,255,255,0.1) 50%);
            z-index: 1;
        }
        
        .book-cover:hover {
            transform: translateY(-10px) rotateY(5deg);
            box-shadow: 0 30px 60px rgba(52, 152, 219, 0.25),
                        0 15px 30px rgba(44, 62, 80, 0.15);
        }
        
        h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
            margin-bottom: 1rem;
            letter-spacing: -0.5px;
        }
        
        .subtitle {
            font-size: 1.5rem;
            color: var(--accent);
            margin-bottom: 1.5rem;
            font-weight: 500;
            position: relative;
            display: inline-block;
        }
        
        .subtitle::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 60px;
            height: 3px;
            background: var(--accent);
        }
        
        .hero-description {
            font-size: 1.15rem;
            color: var(--secondary);
            margin-bottom: 2.5rem;
            max-width: 600px;
            line-height: 1.7;
        }
        
        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: linear-gradient(135deg, var(--accent) 0%, #2980b9 100%);
            color: white;
            padding: 16px 40px;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 6px 20px rgba(52, 152, 219, 0.3);
            position: relative;
            overflow: hidden;
        }
        
        .btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
            transition: 0.5s;
        }
        
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(52, 152, 219, 0.4);
        }
        
        .btn:hover::before {
            left: 100%;
        }
        
        .btn-secondary {
            background: linear-gradient(135deg, var(--primary) 0%, #1a252f 100%);
            box-shadow: 0 6px 20px rgba(44, 62, 80, 0.2);
        }
        
        .btn-secondary:hover {
            box-shadow: 0 10px 25px rgba(44, 62, 80, 0.3);
        }
        
        /* Sections */
        section {
            padding: 6rem 2rem;
            max-width: 1000px;
            margin: 0 auto;
            position: relative;
        }
        
        .section-header {
            text-align: center;
            margin-bottom: 4rem;
        }
        
        h2 {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 1rem;
            position: relative;
            display: inline-block;
        }
        
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--dark-gray);
            max-width: 600px;
            margin: 0 auto;
        }
        
        /* About Section */
        .about-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2.5rem;
            margin-top: 2rem;
        }
        
        .about-card {
            background: var(--white);
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 10px 30px var(--shadow);
            transition: transform 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        
        .about-card:hover {
            transform: translateY(-10px);
        }
        
        .about-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 5px;
            height: 100%;
            background: linear-gradient(to bottom, var(--accent), #2980b9);
        }
        
        .about-card h3 {
            color: var(--primary);
            margin-bottom: 1.2rem;
            font-size: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.7rem;
        }
        
        .card-icon {
            font-size: 1.8rem;
            color: var(--accent);
        }
        
        /* Benefits Grid */
        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2.5rem;
            margin-top: 3rem;
        }
        
        .benefit-item {
            background: var(--white);
            padding: 2.5rem;
            border-radius: 12px;
            text-align: center;
            box-shadow: 0 10px 30px var(--shadow);
            transition: all 0.3s ease;
            border: 1px solid transparent;
        }
        
        .benefit-item:hover {
            transform: translateY(-10px);
            border-color: var(--accent);
            box-shadow: 0 15px 40px rgba(52, 152, 219, 0.15);
        }
        
        .benefit-icon {
            font-size: 3rem;
            margin-bottom: 1.5rem;
            display: inline-block;
            background: var(--light-accent);
            width: 80px;
            height: 80px;
            line-height: 80px;
            border-radius: 50%;
        }
        
        .benefit-item h3 {
            color: var(--primary);
            margin-bottom: 1rem;
            font-size: 1.4rem;
        }
        
        /* Different Section */
        .different-content {
            max-width: 800px;
            margin: 0 auto;
            background: var(--white);
            padding: 3.5rem;
            border-radius: 16px;
            box-shadow: 0 15px 40px var(--shadow);
            position: relative;
            overflow: hidden;
        }
        
        .different-content::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(to right, var(--accent), #9b59b6);
        }
        
        .different-points {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 2.5rem;
        }
        
        .point {
            display: flex;
            align-items: flex-start;
            gap: 1.2rem;
            padding: 1.5rem;
            border-radius: 10px;
            transition: background 0.3s ease;
        }
        
        .point:hover {
            background: var(--light-accent);
        }
        
        .point-icon {
            color: var(--accent);
            font-size: 2rem;
            flex-shrink: 0;
            background: var(--light-accent);
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        /* Pricing Section */
        .pricing-card {
            max-width: 500px;
            margin: 3rem auto 0;
            background: linear-gradient(135deg, var(--white) 0%, #f8f9fa 100%);
            padding: 3.5rem;
            border-radius: 20px;
            box-shadow: 0 20px 50px rgba(44, 62, 80, 0.15);
            text-align: center;
            border: 2px solid var(--white);
            position: relative;
            overflow: hidden;
            transition: transform 0.3s ease;
        }
        
        .pricing-card:hover {
            transform: translateY(-10px);
        }
        
        .pricing-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 6px;
            background: linear-gradient(to right, var(--accent), #3498db, #2980b9);
        }
        
        .price {
            font-size: 3.8rem;
            font-weight: 800;
            color: var(--primary);
            margin: 1.5rem 0;
            display: flex;
            align-items: flex-start;
            justify-content: center;
            gap: 0.3rem;
        }
        
        .currency {
            font-size: 1.8rem;
            color: var(--dark-gray);
            margin-top: 0.5rem;
        }
        
        .price-amount {
            line-height: 1;
        }
        
        .price-period {
            font-size: 1.1rem;
            color: var(--dark-gray);
            margin-top: 1.5rem;
        }
        
        .features-list {
            list-style: none;
            margin: 2.5rem 0;
            text-align: left;
        }
        
        .features-list li {
            padding: 0.8rem 0;
            padding-left: 35px;
            position: relative;
            border-bottom: 1px solid #eee;
        }
        
        .features-list li:last-child {
            border-bottom: none;
        }
        
        .features-list li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--success);
            font-weight: bold;
            font-size: 1.3rem;
            background: #e8f8f0;
            width: 26px;
            height: 26px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        /* Order Form */
        .order-form {
            max-width: 600px;
            margin: 3rem auto 0;
            background: var(--white);
            padding: 3.5rem;
            border-radius: 20px;
            box-shadow: 0 15px 40px var(--shadow);
        }
        
        .form-header {
            text-align: center;
            margin-bottom: 2.5rem;
        }
        
        .form-header h3 {
            color: var(--primary);
            font-size: 1.8rem;
            margin-bottom: 0.5rem;
        }
        
        .form-group {
            margin-bottom: 1.8rem;
            position: relative;
        }
        
        .form-label {
            display: block;
            margin-bottom: 0.7rem;
            font-weight: 600;
            color: var(--primary);
            font-size: 1rem;
        }
        
        .required::after {
            content: " *";
            color: #e74c3c;
        }
        
        .form-control {
            width: 100%;
            padding: 16px 20px;
            border: 2px solid #e8e8e8;
            border-radius: 10px;
            font-size: 1rem;
            font-family: inherit;
            transition: all 0.3s ease;
            background: var(--light);
        }
        
        .form-control:focus {
            outline: none;
            border-color: var(--accent);
            background: var(--white);
            box-shadow: 0 0 0 4px rgba(52, 152, 219, 0.1);
        }
        
        .form-control::placeholder {
            color: var(--gray);
        }
        
        /* Success Message */
        .success-message {
            display: none;
            background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
            color: #155724;
            padding: 2rem;
            border-radius: 12px;
            margin-top: 2.5rem;
            border-left: 5px solid var(--success);
            text-align: center;
            animation: fadeIn 0.5s ease;
        }
        
        /* Final CTA */
        .final-cta {
            text-align: center;
            padding: 5rem 2rem;
            background: linear-gradient(135deg, var(--primary) 0%, #1a252f 100%);
            color: var(--white);
            margin-top: 3rem;
            border-radius: 20px;
            position: relative;
            overflow: hidden;
        }
        
        .final-cta::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%233498db' fill-opacity='0.05' fill-rule='evenodd'/%3E%3C/svg%3E");
        }
        
        .final-cta h2 {
            color: var(--white);
            position: relative;
        }
        
        .final-cta h2::after {
            background-color: var(--white);
        }
        
        .final-cta p {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 1.5rem auto 2rem;
            opacity: 0.9;
            position: relative;
        }
        
        /* Footer */
        footer {
            text-align: center;
            padding: 3rem 2rem;
            color: var(--dark-gray);
            background: var(--primary);
            color: var(--white);
            margin-top: 4rem;
        }
        
        .footer-content {
            max-width: 800px;
            margin: 0 auto;
        }
        
        .footer-links {
            display: flex;
            justify-content: center;
            gap: 2rem;
            margin: 2rem 0;
            flex-wrap: wrap;
        }
        
        .footer-links a {
            color: var(--white);
            text-decoration: none;
            opacity: 0.8;
            transition: opacity 0.3s ease;
        }
        
        .footer-links a:hover {
            opacity: 1;
        }
        
        .copyright {
            margin-top: 2rem;
            padding-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            opacity: 0.7;
        }
        
        /* Responsive Design */
        @media (max-width: 992px) {
            h1 {
                font-size: 2.8rem;
            }
            
            h2 {
                font-size: 2.2rem;
            }
            
            .hero-content {
                gap: 3rem;
            }
            
            .hero {
                padding: 8rem 2rem 4rem;
            }
        }
        
        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: block;
            }
            
            .nav-links {
                display: none;
            }
            
            .mobile-nav.active {
                display: block;
            }
            
            .hero-content {
                flex-direction: column;
                text-align: center;
                gap: 3rem;
            }
            
            .hero::before {
                width: 80%;
                height: 100%;
                right: -40%;
                top: -30%;
            }
            
            .subtitle::after {
                left: 50%;
                transform: translateX(-50%);
            }
            
            h1 {
                font-size: 2.4rem;
            }
            
            h2 {
                font-size: 2rem;
            }
            
            .hero-description {
                font-size: 1.1rem;
            }
            
            section {
                padding: 4rem 1.5rem;
            }
            
            .pricing-card, .order-form, .different-content {
                padding: 2.5rem 2rem;
            }
            
            .about-card, .benefit-item {
                padding: 2rem;
            }
            
            .price {
                font-size: 3.2rem;
            }
        }
        
        @media (max-width: 480px) {
            .nav-container {
                padding: 0 1.5rem;
            }
            
            h1 {
                font-size: 2rem;
            }
            
            .subtitle {
                font-size: 1.3rem;
            }
            
            .btn {
                padding: 14px 30px;
                font-size: 1rem;
            }
            
            .price {
                font-size: 2.8rem;
            }
            
            .about-content, .benefits-grid, .different-points {
                grid-template-columns: 1fr;
            }
        }