/* Reset and Base Styles */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        :root {
            --primary-blue: #00215c;
            --secondary-blue: #0057a6;
            --white: #ffffff;
            --light-bg: #f8fafc;
            --accent: #ffd700;
            --light-gray: #f0f4f8;
            --dark-gray: #333;
        }
        
        body {
            font-family: 'Source Sans Pro', sans-serif;
            color: var(--secondary-blue);
            line-height: 1.6;
            overflow-x: hidden;
            background-color: var(--white);
        }
        
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--primary-blue);
            margin-bottom: 1rem;
        }
        
        h1, h2 {
            font-family: 'Cabin', sans-serif;
        }
        
        h3, h4, h5, h6 {
            font-family: 'Poppins', sans-serif;
        }
        
        p {
            margin-bottom: 1.5rem;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .btn {
            display: inline-block;
            background-color: var(--primary-blue);
            color: var(--white);
            padding: 14px 32px;
            border-radius: 30px;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            font-family: 'Poppins', sans-serif;
            font-size: 16px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        
        .btn:hover {
            background-color: var(--secondary-blue);
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 33, 92, 0.2);
        }
        
        .btn-accent {
            background-color: var(--accent);
            color: var(--primary-blue);
        }
        
        .btn-accent:hover {
            background-color: #ffc400;
        }
        
        section {
            padding: 100px 0;
        }
        
        .text-center {
            text-align: center;
        }
        
        .section-title {
            font-size: 2.5rem;
            margin-bottom: 1.5rem;
            position: relative;
            display: inline-block;
        }
        
        .section-title:after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 0;
            width: 60px;
            height: 4px;
            background: var(--secondary-blue);
        }
        
        .text-center .section-title:after {
            left: 50%;
            transform: translateX(-50%);
        }
        
        /* Header & Navigation */
        header {
            background-color: var(--white);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
        }
        
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        
        .logo {
            font-family: 'Cabin', sans-serif;
            font-weight: 700;
            font-size: 28px;
            color: var(--primary-blue);
            text-decoration: none;
            display: flex;
            align-items: center;
        }
        
        .logo i {
            margin-right: 10px;
            color: var(--secondary-blue);
        }
        
        .nav-links {
            display: flex;
            list-style: none;
        }
        
        .nav-links li {
            margin-left: 30px;
        }
        
        .nav-links a {
            text-decoration: none;
            color: var(--primary-blue);
            font-weight: 600;
            font-family: 'Poppins', sans-serif;
            transition: color 0.3s ease;
            font-size: 16px;
            position: relative;
        }
        
        .nav-links a:after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--secondary-blue);
            transition: width 0.3s ease;
        }
        
        .nav-links a:hover:after {
            width: 100%;
        }
        
        .nav-links a:hover {
            color: var(--secondary-blue);
        }
        
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--primary-blue);
            cursor: pointer;
        }
        
        /* Hero Section */
        .hero {
            background: linear-gradient(rgba(0, 33, 92, 0.85), rgba(0, 87, 166, 0.85)), url('https://images.unsplash.com/photo-1571019613454-1cb2f99b2d8b?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1200&q=80');
            background-size: cover;
            background-position: center;
            color: var(--white);
            padding: 180px 0 120px;
            text-align: center;
            position: relative;
        }
        
        .hero-content {
            max-width: 800px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }
        
        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 20px;
            color: var(--white);
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
        }
        
        .hero p {
            font-size: 1.5rem;
            max-width: 700px;
            margin: 0 auto 40px;
            font-weight: 400;
        }
        
        .hero-buttons {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-top: 30px;
        }
        
        /* About Section */
        .about {
            background-color: var(--light-bg);
            position: relative;
            overflow: hidden;
        }
        
        .about::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -100px;
            width: 300px;
            height: 300px;
            background: var(--secondary-blue);
            opacity: 0.1;
            border-radius: 50%;
        }
        
        .about-content {
            display: flex;
            align-items: center;
            gap: 60px;
            position: relative;
            z-index: 1;
        }
        
        .about-text {
            flex: 1;
        }
        
        .about-image {
            flex: 1;
            height: 450px;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
            transition: transform 0.3s ease;
        }
        
        .about-image:hover {
            transform: translateY(-5px);
        }
        
        .about-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        
        /* Science Section */
        .science {
            position: relative;
        }
        
        .science::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -100px;
            width: 300px;
            height: 300px;
            background: var(--primary-blue);
            opacity: 0.1;
            border-radius: 50%;
            z-index: 0;
        }
        
        .science-cards {
            display: flex;
            gap: 30px;
            margin-top: 50px;
            position: relative;
            z-index: 1;
        }
        
        .science-card {
            flex: 1;
            background-color: var(--white);
            border-radius: 10px;
            padding: 40px 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
            text-align: center;
        }
        
        .science-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
        }
        
        .science-card h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: var(--primary-blue);
        }
        
        .science-icon {
            font-size: 50px;
            margin-bottom: 25px;
            color: var(--secondary-blue);
            display: inline-block;
            width: 80px;
            height: 80px;
            line-height: 80px;
            background: rgba(0, 87, 166, 0.1);
            border-radius: 50%;
            text-align: center;
        }
        
        .source {
            margin-top: 40px;
            font-style: italic;
            opacity: 0.8;
            font-size: 0.9rem;
        }
        
        /* NAD+ Decline Section */
        .nad-decline {
            background-color: var(--light-bg);
            position: relative;
        }
        
        .chart-container {
            max-width: 800px;
            margin: 50px auto;
            background-color: var(--white);
            padding: 40px;
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
        }
        
        .chart {
            height: 300px;
            display: flex;
            align-items: flex-end;
            justify-content: space-around;
            padding: 0 20px;
            border-bottom: 2px solid var(--secondary-blue);
            margin-bottom: 30px;
        }
        
        .chart-bar {
            width: 70px;
            background: linear-gradient(to top, var(--secondary-blue) 0%, var(--primary-blue) 100%);
            border-top-left-radius: 5px;
            border-top-right-radius: 5px;
            position: relative;
            transition: height 1s ease;
        }
        
        .chart-bar-label {
            position: absolute;
            bottom: -30px;
            left: 50%;
            transform: translateX(-50%);
            font-weight: 600;
            font-size: 14px;
        }
        
        .chart-bar-value {
            position: absolute;
            top: -25px;
            left: 50%;
            transform: translateX(-50%);
            font-weight: 600;
            font-size: 14px;
            color: var(--primary-blue);
        }
        
        /* Comparison Section */
        .comparison {
            text-align: center;
            position: relative;
        }
        
        .comparison::before {
            content: '';
            position: absolute;
            top: -50px;
            right: -50px;
            width: 200px;
            height: 200px;
            background: var(--accent);
            opacity: 0.1;
            border-radius: 50%;
            z-index: 0;
        }
        
        .comparison-chart {
            display: flex;
            justify-content: center;
            align-items: flex-end;
            height: 350px;
            gap: 100px;
            margin: 50px 0;
            position: relative;
            z-index: 1;
        }
        
        .comparison-bar {
            width: 90px;
            border-top-left-radius: 5px;
            border-top-right-radius: 5px;
            position: relative;
            transition: height 1s ease;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        
        .bar-nad {
            background: linear-gradient(to top, #4a86e8 0%, #00215c 100%);
            height: 150px;
        }
        
        .bar-combo {
            background: linear-gradient(to top, #8e44ad 0%, #4a235a 100%);
            height: 250px;
        }
        
        .bar-label {
            position: absolute;
            bottom: -40px;
            left: 50%;
            transform: translateX(-50%);
            font-weight: 600;
            white-space: nowrap;
            font-size: 14px;
        }
        
        .bar-value {
            position: absolute;
            top: -30px;
            left: 50%;
            transform: translateX(-50%);
            font-weight: 700;
            font-size: 18px;
            color: var(--primary-blue);
        }
        
        /* How It Works Section */
        .how-it-works {
            background-color: var(--light-bg);
            position: relative;
            overflow: hidden;
        }
        
        .how-it-works::after {
            content: '';
            position: absolute;
            bottom: -100px;
            right: -100px;
            width: 300px;
            height: 300px;
            background: var(--secondary-blue);
            opacity: 0.1;
            border-radius: 50%;
        }
        
        .process-steps {
            display: flex;
            justify-content: space-between;
            max-width: 1000px;
            margin: 50px auto;
            position: relative;
            z-index: 1;
        }
        
        .step {
            text-align: center;
            width: 30%;
            position: relative;
        }
        
        .step:not(:last-child):after {
            content: "";
            position: absolute;
            top: 40px;
            right: -35%;
            width: 70%;
            height: 2px;
            background-color: var(--secondary-blue);
            opacity: 0.5;
        }
        
        .step-number {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
            color: var(--white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            font-weight: 700;
            margin: 0 auto 20px;
            box-shadow: 0 5px 15px rgba(0, 87, 166, 0.3);
        }
        
        /* Product Section */
        .product {
            text-align: center;
            position: relative;
        }
        
        .product::before {
            content: '';
            position: absolute;
            top: -50px;
            left: -50px;
            width: 200px;
            height: 200px;
            background: var(--accent);
            opacity: 0.1;
            border-radius: 50%;
        }
        
        .product-container {
            display: flex;
            align-items: center;
            gap: 60px;
            margin-top: 50px;
            position: relative;
            z-index: 1;
        }
        
        .product-image {
            flex: 1;
            height: 450px;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
            transition: transform 0.3s ease;
        }
        
        .product-image:hover {
            transform: translateY(-5px);
        }
        
        .product-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        
        .product-info {
            flex: 1;
            text-align: left;
        }
        
        .benefits-list {
            list-style: none;
            margin: 30px 0;
        }
        
        .benefits-list li {
            margin-bottom: 15px;
            padding-left: 40px;
            position: relative;
            font-size: 18px;
        }
        
        .benefits-list li:before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--secondary-blue);
            font-weight: bold;
            width: 30px;
            height: 30px;
            background: rgba(0, 87, 166, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .price {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary-blue);
            margin: 20px 0;
        }
        
        /* Testimonials Section */
        .testimonials {
            background-color: var(--light-bg);
            position: relative;
        }
        
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 50px;
        }
        
        .testimonial-card {
            background: var(--white);
            border-radius: 10px;
            padding: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            transition: transform 0.3s ease;
        }
        
        .testimonial-card:hover {
            transform: translateY(-5px);
        }
        
        .testimonial-text {
            font-style: italic;
            margin-bottom: 20px;
            position: relative;
        }
        
        .testimonial-text:before {
            content: "";
            font-size: 4rem;
            color: var(--secondary-blue);
            opacity: 0.2;
            position: absolute;
            top: -20px;
            left: -10px;
            font-family: serif;
        }
        
        .testimonial-author {
            display: flex;
            align-items: center;
        }
        
        .author-avatar {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            overflow: hidden;
            margin-right: 15px;
        }
        
        .author-avatar img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        
        .author-details h4 {
            margin-bottom: 5px;
            font-size: 18px;
        }
        
        .author-details p {
            margin: 0;
            opacity: 0.7;
            font-size: 14px;
        }
        
        /* FAQ Section */
        .faq {
            position: relative;
        }
        
        .faq-container {
            max-width: 800px;
            margin: 50px auto 0;
        }
        
        .faq-item {
            margin-bottom: 20px;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        
        .faq-question {
            background: var(--white);
            padding: 20px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-family: 'Poppins', sans-serif;
        }
        
        .faq-answer {
            background: var(--light-gray);
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
        }
        
        .faq-answer.open {
            padding: 20px;
            max-height: 200px;
        }
        
        /* Footer */
        footer {
            background-color: var(--primary-blue);
            color: var(--white);
            padding: 80px 0 30px;
        }
        
        .footer-content {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }
        
        .footer-column {
            flex: 1;
            min-width: 200px;
            margin-bottom: 30px;
        }
        
        .footer-column h3 {
            color: var(--white);
            margin-bottom: 20px;
            font-size: 1.2rem;
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-column h3:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 2px;
            background: var(--accent);
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 10px;
        }
        
        .footer-links a {
            color: var(--white);
            text-decoration: none;
            opacity: 0.8;
            transition: opacity 0.3s ease;
        }
        
        .footer-links a:hover {
            opacity: 1;
            color: var(--accent);
        }
        
        .social-links {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }
        
        .social-links a {
            display: inline-block;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            color: var(--white);
            text-align: center;
            line-height: 40px;
            transition: all 0.3s ease;
        }
        
        .social-links a:hover {
            background: var(--accent);
            color: var(--primary-blue);
            transform: translateY(-3px);
        }
        
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            opacity: 0.8;
            font-size: 0.9rem;
        }
        
        /* Responsive Styles */
        @media (max-width: 992px) {
            .about-content,
            .product-container {
                flex-direction: column;
            }
            
            .science-cards {
                flex-direction: column;
            }
            
            .process-steps {
                flex-direction: column;
                align-items: center;
            }
            
            .step {
                width: 100%;
                margin-bottom: 40px;
            }
            
            .step:not(:last-child):after {
                display: none;
            }
            
            .comparison-chart {
                gap: 50px;
            }
            
            .section-title {
                font-size: 2rem;
            }
            
            .hero h1 {
                font-size: 2.8rem;
            }
        }
        
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--white);
                flex-direction: column;
                padding: 20px;
                box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            }
            
            .nav-links.active {
                display: flex;
            }
            
            .nav-links li {
                margin: 15px 0;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .hero h1 {
                font-size: 2.2rem;
            }
            
            .hero p {
                font-size: 1.2rem;
            }
            
            .hero-buttons {
                flex-direction: column;
                align-items: center;
            }
            
            .chart {
                flex-direction: column;
                align-items: center;
                height: auto;
                padding: 20px 0;
            }
            
            .chart-bar {
                width: 80%;
                height: 30px !important;
                margin-bottom: 40px;
                border-radius: 5px;
            }
            
            .chart-bar-label,
            .chart-bar-value {
                text-align: center;
            }
            
            .comparison-chart {
                flex-direction: column;
                align-items: center;
                height: auto;
                gap: 40px;
            }
            
            .comparison-bar {
                width: 80%;
                height: 80px;
                border-radius: 5px;
            }
            
            .bar-label,
            .bar-value {
                text-align: center;
            }
            
            .footer-content {
                flex-direction: column;
            }
            
            section {
                padding: 70px 0;
            }
        }
        
        /* Animation Keyframes */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .animate {
            animation: fadeIn 1s ease forwards;
        }
        
        .delay-1 {
            animation-delay: 0.2s;
        }
        
        .delay-2 {
            animation-delay: 0.4s;
        }
        
        .delay-3 {
            animation-delay: 0.6s;
        }