:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #10b981;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --bg-color: #ffffff;
    --bg-secondary: #f9fafb;
    --border-color: #e5e7eb;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    --primary-color: #3b82f6;
    --primary-dark: #2563eb;
    --secondary-color: #10b981;
    --text-color: #f9fafb;
    --text-light: #d1d5db;
    --bg-color: #111827;
    --bg-secondary: #1f2937;
    --border-color: #374151;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    transition: background-color 0.3s, color 0.3s;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.navbar {
    background-color: var(--bg-color);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: background-color 0.3s;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    position: relative;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
    text-decoration: none;
    transition: color 0.3s;
}

.logo img {
    border-radius: 50%;
    object-fit: cover;
}

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

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

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

.cart-link {
    position: relative;
    display: flex;
    align-items: center;
}

.cart-count {
    position: absolute;
    top: -8px;
    right: -8px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    color: var(--text-color);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.3s;
}

.theme-toggle:hover {
    color: var(--primary-color);
}

.sun-icon {
    display: none;
}

.moon-icon {
    display: block;
}

[data-theme="dark"] .sun-icon {
    display: block;
}

[data-theme="dark"] .moon-icon {
    display: none;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    transition: all 0.3s;
}

.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.hero-content h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background-color: #059669;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

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

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.feature-card {
    background-color: var(--bg-color);
    padding: 2rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
    text-align: center;
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: flex;
    justify-content: center;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

.feature-card p {
    color: var(--text-light);
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    text-align: center;
}

.stat-item {
    padding: 1rem;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

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

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

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

.about-content p {
    margin-bottom: 1.5rem;
    color: var(--text-light);
    line-height: 1.8;
    text-align: justify;
}

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

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

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

.product-card {
    background-color: var(--bg-color);
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.product-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.product-card:hover .product-image img {
    transform: scale(1.1);
}

.product-info {
    padding: 1.5rem;
}

.product-info h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

.product-info p {
    color: var(--text-light);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.product-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.product-meta span {
    font-size: 0.85rem;
    padding: 0.25rem 0.75rem;
    background-color: var(--bg-secondary);
    border-radius: 1rem;
    color: var(--text-light);
}

.product-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.product-detail {
    padding: 4rem 0;
}

.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.product-detail-image img {
    width: 100%;
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
}

.product-detail-info h1 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.product-price {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 1rem 0;
}

.product-description {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 2rem;
}

.product-description p {
    margin-bottom: 1rem;
}

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

.product-actions .btn {
    flex: 1;
    text-align: center;
}

.product-features {
    background-color: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 0.5rem;
}

.product-features h3 {
    margin-bottom: 1rem;
    color: var(--text-color);
}

.product-features ul {
    list-style: none;
    color: var(--text-light);
}

.product-features li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.product-features li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: 700;
}

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

.newsletter-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.newsletter-content h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.newsletter-content p {
    margin-bottom: 2rem;
    opacity: 0.95;
}

.newsletter-form {
    display: flex;
    gap: 1rem;
    max-width: 500px;
    margin: 0 auto;
}

.newsletter-form input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
}

.newsletter-message {
    margin-top: 1rem;
    padding: 0.75rem;
    border-radius: 0.5rem;
    display: none;
}

.newsletter-message.success {
    background-color: var(--secondary-color);
    display: block;
}

.newsletter-message.error {
    background-color: #ef4444;
    display: block;
}

.footer {
    background-color: var(--bg-secondary);
    padding: 3rem 0 1rem;
    color: var(--text-light);
}

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

.footer-section h4 {
    color: var(--text-color);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.footer-section p {
    margin-bottom: 1rem;
    line-height: 1.6;
}

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

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

.footer-section a {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: var(--primary-color);
}

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

.social-links a {
    color: var(--text-light);
    transition: color 0.3s;
}

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

.contact-info li {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.contact-info svg {
    flex-shrink: 0;
    margin-top: 0.25rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.cookie-consent {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-secondary);
    box-shadow: var(--shadow-lg);
    padding: 1.5rem;
    z-index: 1000;
    display: none;
}

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

.cookie-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.cookie-content p {
    flex: 1;
    color: var(--text-light);
}

.cookie-content a {
    color: var(--primary-color);
    text-decoration: underline;
}

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

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

.cart-page h1 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--text-color);
}

.cart-empty {
    text-align: center;
    padding: 4rem 0;
}

.cart-empty p {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.cart-items {
    margin-bottom: 2rem;
}

.cart-item {
    display: flex;
    gap: 1.5rem;
    padding: 1.5rem;
    background-color: var(--bg-secondary);
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    align-items: center;
}

.cart-item-image {
    width: 100px;
    height: 100px;
    border-radius: 0.5rem;
    overflow: hidden;
}

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

.cart-item-info {
    flex: 1;
}

.cart-item-info h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.cart-item-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.cart-item-remove {
    background-color: #ef4444;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: background-color 0.3s;
}

.cart-item-remove:hover {
    background-color: #dc2626;
}

.cart-summary {
    background-color: var(--bg-secondary);
    padding: 2rem;
    border-radius: 0.5rem;
    max-width: 400px;
    margin-left: auto;
}

.cart-summary h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.summary-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
    color: var(--text-light);
}

.summary-row.total {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-color);
    padding-top: 1rem;
    border-top: 2px solid var(--border-color);
}

.checkout-form {
    background-color: var(--bg-secondary);
    padding: 2rem;
    border-radius: 0.5rem;
}

.checkout-form h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

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

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: border-color 0.3s;
}

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

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

.contact-page h1 {
    font-size: 2rem;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--text-color);
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info-section {
    background-color: var(--bg-secondary);
    padding: 2rem;
    border-radius: 0.5rem;
}

.contact-info-section h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.blog-post {
    padding: 4rem 0;
}

.blog-post-header {
    max-width: 800px;
    margin: 0 auto 3rem;
}

.blog-post-header h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    line-height: 1.2;
}

.blog-post-meta {
    display: flex;
    gap: 2rem;
    color: var(--text-light);
    font-size: 0.9rem;
    flex-wrap: wrap;
}

.blog-post-content {
    max-width: 800px;
    margin: 0 auto;
}

.blog-post-content .lead {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.blog-post-content h2 {
    font-size: 1.75rem;
    margin: 2.5rem 0 1rem;
    color: var(--text-color);
}

.blog-post-content p {
    margin-bottom: 1.5rem;
    color: var(--text-light);
    line-height: 1.8;
}

.blog-post-footer {
    max-width: 800px;
    margin: 3rem auto 0;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.post-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.tag {
    padding: 0.25rem 0.75rem;
    background-color: var(--bg-secondary);
    border-radius: 1rem;
    font-size: 0.85rem;
    color: var(--text-light);
}

.post-share h4 {
    margin-bottom: 1rem;
    color: var(--text-color);
}

.related-posts {
    max-width: 800px;
    margin: 4rem auto 0;
}

.related-posts h3 {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: var(--text-color);
}

.related-posts-grid {
    display: grid;
    gap: 1.5rem;
}

.related-post-card {
    padding: 1.5rem;
    background-color: var(--bg-secondary);
    border-radius: 0.5rem;
    text-decoration: none;
    transition: all 0.3s;
}

.related-post-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.related-post-card h4 {
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.related-post-card p {
    color: var(--text-light);
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--bg-color);
        flex-direction: column;
        padding: 1rem;
        box-shadow: var(--shadow-md);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .features-grid,
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .product-detail-grid,
    .contact-container {
        grid-template-columns: 1fr;
    }
    
    .cart-item {
        flex-direction: column;
    }
    
    .cookie-content {
        flex-direction: column;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
}