:root {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --secondary-color: #64748b;
    --text-dark: #1e293b;
    --text-light: #64748b;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --border-color: #e2e8f0;
    --success: #22c55e;
    --error: #ef4444;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.navbar {
    background: var(--bg-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

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

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.cart-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.cart-count {
    background: var(--primary-color);
    color: white;
    padding: 0.125rem 0.5rem;
    border-radius: 12px;
    font-size: 0.875rem;
    font-weight: 600;
}

.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, #1e40af 100%);
    color: white;
    padding: 5rem 0;
    text-align: center;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    text-align: center;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--bg-light);
    color: var(--text-dark);
}

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

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
    width: 100%;
}

.advantages {
    padding: 5rem 0;
    background: var(--bg-light);
}

.advantages h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

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

.advantage-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.advantage-icon {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.advantage-card h3 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

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

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    color: var(--text-light);
    font-size: 1.125rem;
}

.about-courses {
    padding: 5rem 0;
}

.about-courses h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 2rem;
}

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

.about-text p {
    margin-bottom: 1.5rem;
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-dark);
}

.courses {
    padding: 5rem 0;
    background: var(--bg-light);
}

.courses h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

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

.product-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.product-image img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.product-info {
    padding: 1.5rem;
}

.product-info h3 {
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}

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

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

.duration, .level {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--bg-light);
    border-radius: 20px;
    font-size: 0.875rem;
    color: var(--text-dark);
}

.product-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

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

.product-actions .btn {
    flex: 1;
}

.calculator-section {
    padding: 5rem 0;
}

.calculator-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.calculator {
    max-width: 900px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
}

.calculator-result {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 8px;
}

.result-item {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.result-item.total {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    border-top: 2px solid var(--primary-color);
    border-bottom: none;
    margin-top: 1rem;
    padding-top: 1rem;
}

.testimonials {
    padding: 5rem 0;
    background: var(--bg-light);
}

.testimonials h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

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

.testimonial-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.testimonial-text {
    font-style: italic;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.testimonial-author strong {
    display: block;
    margin-bottom: 0.25rem;
}

.testimonial-author span {
    color: var(--text-light);
    font-size: 0.875rem;
}

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

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

.footer-section h4 {
    margin-bottom: 1rem;
}

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

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition);
}

.footer-section a:hover {
    color: white;
}

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

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: var(--transition);
}

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

.contact-info li {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--text-dark);
    color: white;
    padding: 1.5rem;
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    display: none;
}

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

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

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

.notification {
    position: fixed;
    top: 80px;
    right: 20px;
    background: white;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    z-index: 3000;
    display: none;
    max-width: 400px;
}

.notification.show {
    display: block;
    animation: slideIn 0.3s ease;
}

.notification.success {
    border-left: 4px solid var(--success);
}

.notification.error {
    border-left: 4px solid var(--error);
}

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

.product-detail {
    padding: 3rem 0;
}

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

.product-detail-image img {
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.product-price-large {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 1rem 0;
}

.product-description {
    margin: 1.5rem 0;
    font-size: 1.125rem;
}

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

.product-tabs {
    margin-top: 3rem;
}

.tabs {
    display: flex;
    gap: 1rem;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 2rem;
}

.tab-button {
    padding: 1rem 2rem;
    background: none;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-light);
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: var(--transition);
}

.tab-button.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.tab-content h2 {
    margin-bottom: 1.5rem;
}

.tab-content h3 {
    margin: 2rem 0 1rem;
}

.tab-content ul {
    list-style: disc;
    margin-left: 2rem;
}

.tab-content li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.program-module {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--bg-light);
    border-radius: 8px;
}

.post-cta {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    margin: 3rem 0;
}

.post-cta h3 {
    margin-bottom: 1rem;
}

.cart-page, .checkout-page, .success-page {
    min-height: 60vh;
    padding: 3rem 0;
}

.cart-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
}

.empty-cart {
    text-align: center;
    padding: 3rem;
    color: var(--text-light);
}

.empty-cart svg {
    margin: 0 auto 2rem;
    opacity: 0.3;
}

.cart-item {
    display: flex;
    gap: 1.5rem;
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 1rem;
}

.cart-item-image {
    width: 120px;
    height: 80px;
    border-radius: 8px;
    overflow: hidden;
}

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

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

.cart-item-name {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.cart-item-price {
    font-size: 1.25rem;
    color: var(--primary-color);
    font-weight: 700;
}

.cart-item-remove {
    background: var(--error);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
}

.cart-item-remove:hover {
    opacity: 0.8;
}

.cart-summary {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    height: fit-content;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

.summary-row.total {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    border-top: 2px solid var(--primary-color);
    border-bottom: none;
}

.checkout-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
}

.checkout-form {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

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

.order-summary {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    height: fit-content;
}

.order-item {
    display: flex;
    justify-content: space-between;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

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

.success-icon {
    margin: 0 auto 2rem;
}

.success-message {
    font-size: 1.125rem;
    margin: 1rem 0;
    color: var(--text-light);
}

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

.blog-post {
    padding: 3rem 0;
}

.post-header {
    max-width: 800px;
    margin: 0 auto 2rem;
}

.post-meta {
    display: flex;
    gap: 1rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.post-author {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-weight: 600;
}

.author-role {
    font-size: 0.875rem;
    color: var(--text-light);
}

.post-image {
    max-width: 1200px;
    margin: 0 auto 3rem;
    border-radius: 12px;
    overflow: hidden;
}

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

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

.post-content h2 {
    margin: 2.5rem 0 1rem;
    font-size: 2rem;
}

.post-content h3 {
    margin: 2rem 0 1rem;
    font-size: 1.5rem;
}

.post-content p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.post-content ul, .post-content ol {
    margin-bottom: 1.5rem;
    margin-left: 2rem;
}

.post-content li {
    margin-bottom: 0.75rem;
    line-height: 1.8;
}

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

.post-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.tag {
    padding: 0.375rem 0.75rem;
    background: var(--bg-light);
    border-radius: 20px;
    font-size: 0.875rem;
    color: var(--text-dark);
}

.post-share {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-light);
    border-radius: 50%;
    transition: var(--transition);
}

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

.related-posts {
    max-width: 1200px;
    margin: 4rem auto 0;
}

.related-posts h3 {
    margin-bottom: 2rem;
    font-size: 2rem;
}

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

.related-post-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

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

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

.related-post-content {
    padding: 1.5rem;
}

.related-post-content h4 {
    margin-bottom: 0.5rem;
}

.related-post-date {
    font-size: 0.875rem;
    color: var(--text-light);
}

@media (max-width: 768px) {
    .nav-menu {
        gap: 1rem;
        font-size: 0.875rem;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .advantages-grid, .products-grid, .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .calculator {
        grid-template-columns: 1fr;
    }
    
    .product-detail-grid {
        grid-template-columns: 1fr;
    }
    
    .cart-content, .checkout-content {
        grid-template-columns: 1fr;
    }
    
    .cookie-content {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .tabs {
        flex-wrap: wrap;
    }
    
    .tab-button {
        padding: 0.75rem 1rem;
    }
}