/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #2c3e50;
    background-color: #ffffff;
    font-size: 16px;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background: #ffffff;
    padding: 20px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    height: 40px;
    width: auto;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    padding: 80px 0;
    text-align: center;
}

.headline {
    font-size: 3.5rem;
    font-weight: 700;
    color: #1a202c;
    margin-bottom: 20px;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.subheadline {
    font-size: 1.5rem;
    font-weight: 400;
    color: #4a5568;
    margin-bottom: 0;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.4;
}

/* Introduction Section */
.introduction-section {
    padding: 80px 0;
    background: #ffffff;
}

.intro-text {
    font-size: 1.2rem;
    line-height: 1.8;
    color: #4a5568;
    margin-bottom: 25px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.intro-text.highlight {
    font-size: 1.3rem;
    font-weight: 600;
    color: #2b6cb0;
    background: linear-gradient(120deg, #e6f3ff 0%, #cce7ff 100%);
    padding: 20px 30px;
    border-radius: 12px;
    border-left: 4px solid #2b6cb0;
}

/* Benefits Section */
.benefits-section {
    padding: 80px 0;
    background: #f7fafc;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 600;
    color: #1a202c;
    text-align: center;
    margin-bottom: 60px;
    line-height: 1.3;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 40px;
}

.benefit-item {
    background: #ffffff;
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e2e8f0;
}

.benefit-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.benefit-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: block;
}

.benefit-item h4 {
    font-size: 1.4rem;
    font-weight: 600;
    color: #1a202c;
    margin-bottom: 15px;
    line-height: 1.3;
}

.benefit-item p {
    color: #4a5568;
    line-height: 1.6;
    font-size: 1rem;
}

/* Trust Section */
.trust-section {
    padding: 80px 0;
    background: #ffffff;
}

.testimonials {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.testimonial-item {
    background: #f8fafc;
    border-radius: 16px;
    padding: 30px;
    border-left: 4px solid #48bb78;
    transition: transform 0.3s ease;
}

.testimonial-item:hover {
    transform: translateY(-3px);
}

.testimonial-content p {
    font-size: 1.1rem;
    line-height: 1.7;
    color: #2d3748;
    margin-bottom: 20px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.testimonial-author strong {
    color: #1a202c;
    font-weight: 600;
}

.verified {
    color: #48bb78;
    font-size: 0.9rem;
    font-weight: 500;
}

.review-images {
    text-align: center;
    margin: 50px 0;
}

.reviews-photo {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.scientific-backing {
    text-align: center;
    margin: 50px 0;
    padding: 30px;
    background: linear-gradient(120deg, #e6fffa 0%, #c6f6d5 100%);
    border-radius: 16px;
    border: 1px solid #9ae6b4;
}

.backing-text {
    font-size: 1.1rem;
    color: #2f855a;
    font-weight: 500;
    line-height: 1.6;
}

.certifications, .trust-badges, .references {
    text-align: center;
    margin: 40px 0;
}

.cert-badges, .ref-logos {
    max-width: 100%;
    height: auto;
    opacity: 0.9;
}

.trust-badge {
    max-height: 80px;
    margin: 0 15px;
    opacity: 0.9;
}

.references-text {
    font-size: 1rem;
    color: #718096;
    margin-bottom: 20px;
    font-weight: 500;
}

/* Tease Section */
.tease-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #ffffff;
}

.product-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.product-image {
    max-width: 100%;
    height: auto;
    border-radius: 16px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.tease-content h3 {
    font-size: 2.2rem;
    font-weight: 600;
    margin-bottom: 30px;
    line-height: 1.3;
}

.tease-text {
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: 20px;
    opacity: 0.95;
}

.tease-text.highlight {
    font-size: 1.3rem;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: 12px;
    border-left: 4px solid #ffffff;
}

/* CTA Section */
.cta-section {
    padding: 80px 0;
    background: #f7fafc;
    text-align: center;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 600;
    color: #1a202c;
    margin-bottom: 20px;
    line-height: 1.3;
}

.cta-subtitle {
    font-size: 1.2rem;
    color: #4a5568;
    margin-bottom: 40px;
    line-height: 1.5;
}

.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
    color: #ffffff;
    font-size: 1.3rem;
    font-weight: 600;
    padding: 20px 50px;
    border-radius: 50px;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(72, 187, 120, 0.3);
    border: none;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(72, 187, 120, 0.4);
    background: linear-gradient(135deg, #38a169 0%, #2f855a 100%);
}

.cta-guarantee {
    margin-top: 30px;
    font-size: 1rem;
    color: #4a5568;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.guarantee-small {
    height: 30px;
    width: auto;
}

/* Footer */
footer {
    background: #2d3748;
    color: #a0aec0;
    padding: 30px 0;
    text-align: center;
}

footer p {
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .headline {
        font-size: 2.5rem;
    }
    
    .subheadline {
        font-size: 1.2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .benefits-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .testimonials {
        grid-template-columns: 1fr;
    }
    
    .product-showcase {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .tease-content h3 {
        font-size: 1.8rem;
    }
    
    .cta-title {
        font-size: 2rem;
    }
    
    .cta-button {
        font-size: 1.1rem;
        padding: 18px 40px;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .hero-section, .introduction-section, .benefits-section, .trust-section, .tease-section, .cta-section {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .headline {
        font-size: 2rem;
    }
    
    .subheadline {
        font-size: 1.1rem;
    }
    
    .intro-text {
        font-size: 1.1rem;
    }
    
    .benefit-item {
        padding: 30px 20px;
    }
    
    .testimonial-item {
        padding: 25px;
    }
    
    .cta-button {
        font-size: 1rem;
        padding: 16px 35px;
    }
    
    .trust-badge {
        max-height: 60px;
        margin: 0 10px;
    }
}

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

/* Loading Animation */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.benefit-item, .testimonial-item {
    animation: fadeInUp 0.6s ease-out;
}

/* Focus States for Accessibility */
.cta-button:focus {
    outline: 3px solid #4299e1;
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .hero-section, .cta-section {
        background: #ffffff !important;
        color: #000000 !important;
    }
    
    .cta-button {
        background: #000000 !important;
        color: #ffffff !important;
    }
}