:root {
    --primary-color: #1a3a52;
    --secondary-color: #2c5f7c;
    --accent-color: #4a90a4;
    --text-dark: #2d3748;
    --text-light: #718096;
    --bg-light: #f7fafc;
    --bg-white: #ffffff;
    --border-color: #e2e8f0;
    --success-color: #48bb78;
    --warning-color: #ed8936;
    --danger-color: #f56565;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--bg-light);
}

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

header {
    background-color: var(--bg-white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    padding: 1rem 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

.logo img {
    border-radius: 8px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--accent-color);
}

.cart-count {
    background-color: var(--accent-color);
    color: white;
    border-radius: 50%;
    padding: 2px 6px;
    font-size: 0.75rem;
    margin-left: 5px;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    margin: 3px 0;
    transition: 0.3s;
}

.hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.95;
}

.cta-button {
    display: inline-block;
    background-color: var(--accent-color);
    color: white;
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: background-color 0.3s;
}

.cta-button:hover {
    background-color: var(--secondary-color);
}

.features {
    padding: 4rem 0;
    background-color: var(--bg-white);
}

.features h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    color: var(--primary-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.feature-card {
    text-align: center;
    padding: 2rem;
    background-color: var(--bg-light);
    border-radius: 10px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.feature-card i {
    font-size: 3rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
    padding-top: 3rem;
    border-top: 2px solid var(--border-color);
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-light);
    font-size: 1rem;
}

.about-products {
    padding: 4rem 0;
    background-color: var(--bg-light);
}

.about-products h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-content p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    line-height: 1.8;
}

.quality-points {
    background-color: var(--bg-white);
    padding: 2rem;
    border-radius: 10px;
    margin: 2rem 0;
}

.quality-points h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.quality-points ul {
    list-style: none;
}

.quality-points li {
    margin-bottom: 1rem;
    padding-left: 2rem;
    position: relative;
}

.quality-points li i {
    position: absolute;
    left: 0;
    top: 3px;
    color: var(--success-color);
}

.beginner-section {
    padding: 4rem 0;
    background-color: var(--bg-white);
}

.beginner-card {
    max-width: 800px;
    margin: 0 auto;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 3rem;
    border-radius: 15px;
    text-align: center;
}

.beginner-card i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.9;
}

.beginner-card h2 {
    margin-bottom: 1rem;
}

.beginner-tips {
    background-color: rgba(255,255,255,0.1);
    padding: 2rem;
    border-radius: 10px;
    margin: 2rem 0;
    text-align: left;
}

.beginner-tips h3 {
    margin-bottom: 1rem;
}

.beginner-tips ul {
    list-style: none;
}

.beginner-tips li {
    margin-bottom: 0.8rem;
    padding-left: 2rem;
    position: relative;
}

.beginner-tips li i {
    position: absolute;
    left: 0;
    top: 3px;
    font-size: 1rem;
}

.btn-secondary {
    display: inline-block;
    background-color: rgba(255,255,255,0.2);
    color: white;
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    border: 2px solid white;
    transition: all 0.3s;
}

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

.fun-fact {
    padding: 3rem 0;
    background-color: var(--bg-light);
}

.fact-card {
    max-width: 700px;
    margin: 0 auto;
    background-color: var(--bg-white);
    padding: 2.5rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    text-align: center;
}

.fact-card i {
    font-size: 2rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.fact-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.fact-card p {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--text-light);
}

.products {
    padding: 4rem 0;
    background-color: var(--bg-white);
}

.products h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 3rem;
}

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

.product-card {
    background-color: var(--bg-white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.product-image {
    width: 100%;
    height: 250px;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-info {
    padding: 1.5rem;
}

.product-info h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.product-info p {
    color: var(--text-light);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.product-price {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.btn-primary {
    display: inline-block;
    background-color: var(--accent-color);
    color: white;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: background-color 0.3s;
    border: none;
    cursor: pointer;
    text-align: center;
}

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

.cta-section {
    padding: 4rem 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    text-align: center;
}

.cta-section h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.cta-section p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

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

.cta-button-secondary {
    display: inline-block;
    background-color: rgba(255,255,255,0.2);
    color: white;
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    border: 2px solid white;
    transition: all 0.3s;
}

.cta-button-secondary:hover {
    background-color: white;
    color: var(--primary-color);
}

footer {
    background-color: var(--primary-color);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-column h4 {
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.footer-column p {
    margin-bottom: 0.5rem;
    opacity: 0.9;
}

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

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

.footer-column a {
    color: white;
    text-decoration: none;
    opacity: 0.9;
    transition: opacity 0.3s;
}

.footer-column a:hover {
    opacity: 1;
    text-decoration: underline;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255,255,255,0.1);
    border-radius: 50%;
    font-size: 1.2rem;
    transition: background-color 0.3s;
}

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

.footer-disclaimer {
    background-color: rgba(0,0,0,0.2);
    padding: 1.5rem;
    border-radius: 5px;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    opacity: 0.8;
    font-size: 0.9rem;
}

.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-white);
    box-shadow: 0 -5px 20px rgba(0,0,0,0.2);
    padding: 1.5rem;
    z-index: 9999;
    display: none;
}

.cookie-banner.show {
    display: block;
}

.cookie-content {
    max-width: 1200px;
    margin: 0 auto;
}

.cookie-content p {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.cookie-content a {
    color: var(--accent-color);
}

.cookie-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.cookie-buttons button {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s;
}

.product-detail {
    padding: 4rem 0;
    background-color: var(--bg-white);
}

.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.product-detail-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.product-detail-info h1 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.product-price-large {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--accent-color);
    margin-bottom: 2rem;
}

.product-description h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    margin-top: 1.5rem;
}

.product-description ul {
    list-style: none;
    margin-bottom: 1.5rem;
}

.product-description li {
    margin-bottom: 0.8rem;
    padding-left: 2rem;
    position: relative;
}

.product-description li i {
    position: absolute;
    left: 0;
    color: var(--success-color);
}

.educational-disclaimer {
    background-color: #fff3cd;
    border-left: 4px solid #ffc107;
    padding: 1rem;
    margin: 1.5rem 0;
    border-radius: 5px;
}

.educational-disclaimer i {
    color: #ffc107;
    margin-right: 0.5rem;
}

.product-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.product-actions button {
    flex: 1;
}

.btn-add-cart {
    background-color: var(--accent-color);
}

.btn-buy-now {
    background-color: var(--success-color);
}

.product-additional-info {
    background-color: var(--bg-light);
    padding: 2rem;
    border-radius: 10px;
}

.product-additional-info h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.curriculum {
    display: grid;
    gap: 1.5rem;
}

.curriculum-item {
    background-color: var(--bg-white);
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid var(--accent-color);
}

.curriculum-item h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.presenter-info {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: var(--bg-white);
    border-radius: 8px;
}

.notification {
    position: fixed;
    top: 100px;
    right: 20px;
    background-color: var(--success-color);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 5px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    display: none;
    z-index: 9999;
    animation: slideIn 0.3s ease;
}

.notification.show {
    display: block;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.cart-section {
    padding: 4rem 0;
    min-height: 60vh;
}

.cart-section h1 {
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.cart-empty {
    text-align: center;
    padding: 4rem 2rem;
}

.cart-empty i {
    font-size: 5rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.cart-empty p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.cart-items {
    display: grid;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.cart-item {
    display: grid;
    grid-template-columns: 100px 1fr auto auto;
    gap: 1.5rem;
    align-items: center;
    background-color: var(--bg-white);
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.cart-item-image img {
    width: 100px;
    height: 100px;
    object-fit: cover;
    border-radius: 8px;
}

.cart-item-info h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.cart-item-price {
    font-size: 1.3rem;
    font-weight: bold;
    color: var(--accent-color);
}

.cart-item-quantity {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.quantity-btn {
    background-color: var(--accent-color);
    color: white;
    border: none;
    width: 30px;
    height: 30px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1.2rem;
}

.quantity-btn:hover {
    background-color: var(--secondary-color);
}

.quantity-display {
    font-size: 1.2rem;
    font-weight: bold;
    min-width: 30px;
    text-align: center;
}

.remove-btn {
    background-color: var(--danger-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
}

.remove-btn:hover {
    background-color: #e53e3e;
}

.cart-summary {
    background-color: var(--bg-white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    max-width: 400px;
    margin-left: auto;
}

.cart-summary h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.summary-row.total {
    border-top: 2px solid var(--border-color);
    padding-top: 1rem;
    margin-top: 1rem;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-color);
}

.btn-block {
    width: 100%;
    margin-top: 1rem;
}

.checkout-section {
    padding: 4rem 0;
    min-height: 60vh;
}

.checkout-section h1 {
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.checkout-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 3rem;
}

.checkout-form h2,
.checkout-summary h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-dark);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-color);
}

.checkout-summary {
    background-color: var(--bg-white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    height: fit-content;
}

.checkout-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.checkout-total {
    margin-top: 1.5rem;
}

.success-section {
    padding: 4rem 0;
    min-height: 60vh;
}

.success-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.success-icon {
    font-size: 5rem;
    color: var(--success-color);
    margin-bottom: 1.5rem;
}

.success-content h1 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.success-message {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.success-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin: 2rem 0;
    flex-wrap: wrap;
}

.success-info {
    background-color: var(--bg-light);
    padding: 2rem;
    border-radius: 10px;
    margin-top: 2rem;
}

.success-info h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.success-info ul {
    list-style: none;
    text-align: left;
}

.success-info li {
    margin-bottom: 1rem;
    padding-left: 2rem;
    position: relative;
}

.success-info li i {
    position: absolute;
    left: 0;
    color: var(--success-color);
}

.contact-hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 3rem 0;
    text-align: center;
}

.contact-hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.contact-section {
    padding: 4rem 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 3rem;
}

.contact-info h2 {
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.contact-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    align-items: flex-start;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--accent-color);
    margin-top: 0.25rem;
}

.contact-item h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.download-section {
    background-color: var(--bg-light);
    padding: 1.5rem;
    border-radius: 10px;
    margin-top: 2rem;
}

.download-section h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.contact-form-container {
    background-color: var(--bg-white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.contact-form-container h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.form-message {
    padding: 1rem;
    border-radius: 5px;
    margin-top: 1rem;
}

.form-message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.form-message i {
    margin-right: 0.5rem;
}

.about-hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 3rem 0;
    text-align: center;
}

.about-hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.about-content {
    padding: 4rem 0;
}

.about-description {
    max-width: 900px;
    margin: 0 auto;
}

.about-description h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    margin-top: 2rem;
}

.about-description p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.about-description ul {
    margin: 1.5rem 0;
    padding-left: 2rem;
}

.about-description li {
    margin-bottom: 0.8rem;
    line-height: 1.6;
}

.about-values {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.value-item {
    text-align: center;
    padding: 2rem;
    background-color: var(--bg-light);
    border-radius: 10px;
}

.value-item i {
    font-size: 3rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.value-item h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.team-section {
    padding: 4rem 0;
    background-color: var(--bg-light);
}

.team-section h2 {
    text-align: center;
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 1rem;
}

.team-intro {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 3rem;
}

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

.team-member {
    background-color: var(--bg-white);
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.team-member:hover {
    transform: translateY(-5px);
}

.team-member img {
    border-radius: 50%;
    margin-bottom: 1rem;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.team-member h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.team-role {
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 1rem;
}

.team-bio {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

.certifications-section {
    padding: 4rem 0;
    background-color: var(--bg-white);
}

.certifications-section h2 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 3rem;
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.cert-item {
    text-align: center;
    padding: 2rem;
    background-color: var(--bg-light);
    border-radius: 10px;
}

.cert-item i {
    font-size: 3rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.cert-item h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0,0,0,0.05);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .product-detail-grid {
        grid-template-columns: 1fr;
    }
    
    .product-actions {
        flex-direction: column;
    }
    
    .checkout-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .cart-item {
        grid-template-columns: 80px 1fr;
        gap: 1rem;
    }
    
    .cart-item-quantity,
    .cart-item-actions {
        grid-column: 2;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.5rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .stats {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
}