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

:root {
    --primary-color: #1a1a1a;
    --secondary-color: #2d2d2d;
    --accent-color: #4a9eff;
    --accent-dark: #2b7ad3;
    --text-light: #ffffff;
    --text-gray: #b0b0b0;
    --border-color: #3d3d3d;
    --success-color: #4caf50;
    --warning-color: #ff9800;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-light);
    background-color: var(--primary-color);
}

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

/* Navigation */
.navbar {
    background-color: var(--secondary-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 2px solid var(--accent-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: bold;
}

.logo {
    font-size: 2rem;
    color: var(--accent-color);
}

.brand-name {
    color: var(--text-light);
    letter-spacing: 1px;
}

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

.nav-links a {
    color: var(--text-gray);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
}

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--primary-color) 100%);
    padding: 6rem 0;
    text-align: center;
    border-bottom: 3px solid var(--accent-color);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(74, 158, 255, 0.03) 2px, rgba(74, 158, 255, 0.03) 4px);
    pointer-events: none;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    font-weight: 800;
    letter-spacing: 2px;
    text-transform: uppercase;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.subtitle {
    font-size: 1.3rem;
    color: var(--text-gray);
    margin-bottom: 2rem;
    font-style: italic;
}

.certifications {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.cert-badge {
    background-color: rgba(74, 158, 255, 0.1);
    border: 1px solid var(--accent-color);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Products Section */
.products-section {
    padding: 5rem 0;
    background-color: var(--primary-color);
}

.products-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.section-intro {
    text-align: center;
    color: var(--text-gray);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.product-card {
    background-color: var(--secondary-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(74, 158, 255, 0.2);
    border-color: var(--accent-color);
}

.product-card.featured {
    border: 2px solid var(--accent-color);
    box-shadow: 0 0 20px rgba(74, 158, 255, 0.2);
}

.product-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background-color: var(--warning-color);
    color: var(--primary-color);
    padding: 0.3rem 0.8rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: bold;
    letter-spacing: 0.5px;
}

.product-badge.premium {
    background-color: var(--accent-color);
    color: var(--text-light);
}

.product-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.product-card h3 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
    color: var(--text-light);
}

.price {
    font-size: 1.8rem;
    color: var(--accent-color);
    font-weight: bold;
    margin-bottom: 1rem;
}

.features {
    list-style: none;
    margin-top: 1rem;
}

.features li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-gray);
    font-size: 0.9rem;
}

.features li:last-child {
    border-bottom: none;
}

.features li::before {
    content: '✓';
    color: var(--success-color);
    font-weight: bold;
    margin-right: 0.5rem;
}

/* Testimonials Section */
.testimonials-section {
    padding: 5rem 0;
    background-color: var(--secondary-color);
}

.testimonials-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.testimonial-card {
    background-color: var(--primary-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    transition: transform 0.3s ease;
}

.testimonial-card:hover {
    transform: translateY(-3px);
    border-color: var(--accent-color);
}

.stars {
    color: var(--warning-color);
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.testimonial-text {
    color: var(--text-gray);
    font-style: italic;
    margin-bottom: 1rem;
    line-height: 1.8;
}

.testimonial-author {
    font-weight: bold;
    color: var(--text-light);
    margin-bottom: 0.3rem;
}

.testimonial-location {
    color: var(--text-gray);
    font-size: 0.9rem;
}

/* FAQ Section */
.faq-section {
    padding: 5rem 0;
    background-color: var(--primary-color);
}

.faq-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.faq-grid {
    display: grid;
    gap: 1.5rem;
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background-color: var(--secondary-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: var(--accent-color);
    box-shadow: 0 2px 10px rgba(74, 158, 255, 0.1);
}

.faq-question {
    color: var(--accent-color);
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
    font-weight: 600;
}

.faq-answer {
    color: var(--text-gray);
    line-height: 1.8;
}

/* Footer */
.footer {
    background-color: var(--secondary-color);
    border-top: 3px solid var(--accent-color);
    padding: 3rem 0 1rem;
    margin-top: 3rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    color: var(--accent-color);
    margin-bottom: 1rem;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-section p {
    color: var(--text-gray);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

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

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

.footer-section ul li a {
    color: var(--text-gray);
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 0.9rem;
}

.footer-section ul li a:hover {
    color: var(--accent-color);
}

.fine-print {
    font-size: 0.75rem;
    font-style: italic;
    margin-top: 0.5rem;
    opacity: 0.7;
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
    text-align: center;
}

.footer-bottom p {
    color: var(--text-gray);
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
}

.disclaimer {
    font-size: 0.7rem;
    opacity: 0.6;
    font-style: italic;
    max-width: 800px;
    margin: 1rem auto 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .subtitle {
        font-size: 1.1rem;
    }

    .nav-links {
        gap: 1rem;
        font-size: 0.85rem;
    }

    .products-section h2,
    .testimonials-section h2,
    .faq-section h2 {
        font-size: 2rem;
    }

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

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

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }

    .nav-links {
        flex-direction: column;
        gap: 0.5rem;
    }

    .certifications {
        flex-direction: column;
        align-items: center;
    }
}