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

:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --text-color: #333;
    --light-bg: #f8f9fa;
    --border-color: #dee2e6;
    --success-color: #27ae60;
    --white: #ffffff;
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    font-size: 16px;
}

body.large-font {
    font-size: 18px;
}

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

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

.navbar {
    padding: 1rem 0;
}

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

.logo a {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--primary-color);
    font-size: 1.5rem;
    font-weight: 700;
}

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

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

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

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

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

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

.font-size-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    color: var(--text-color);
    transition: var(--transition);
}

.font-size-btn:hover {
    color: var(--secondary-color);
}

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

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

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

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

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

.btn-primary:hover {
    background: #c0392b;
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background: #2980b9;
}

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

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

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

.advantage-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    text-align: center;
    transition: var(--transition);
}

.advantage-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

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

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

.statistics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

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

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

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

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

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

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.about-text p {
    margin-bottom: 1.5rem;
    text-align: justify;
}

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

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

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

.product-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

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

.product-info {
    padding: 1.5rem;
}

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

.product-info p {
    margin-bottom: 1rem;
    color: #666;
}

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

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

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

.product-detail-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

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

.product-description {
    margin: 2rem 0;
}

.product-features {
    margin: 2rem 0;
}

.product-features ul {
    list-style: none;
    padding-left: 0;
}

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

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

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

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

.cart-page h1, .checkout-page h1, .contact-page h1 {
    color: var(--primary-color);
    margin-bottom: 2rem;
}

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

.empty-cart svg {
    color: var(--border-color);
    margin-bottom: 1rem;
}

.empty-cart h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

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

.cart-item {
    display: flex;
    gap: 1.5rem;
    padding: 1.5rem;
    background: var(--white);
    border-radius: 10px;
    margin-bottom: 1rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.cart-item-image img {
    width: 150px;
    height: 100px;
    object-fit: cover;
    border-radius: 5px;
}

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

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

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

.remove-item:hover {
    background: #c0392b;
}

.cart-summary {
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.summary-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
}

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

.checkout-form, .contact-form {
    max-width: 600px;
}

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

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

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

.success-page {
    padding: 4rem 0;
    text-align: center;
}

.success-icon {
    color: var(--success-color);
    margin-bottom: 2rem;
}

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

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

.contact-info {
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.contact-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.contact-item svg {
    color: var(--secondary-color);
    flex-shrink: 0;
}

.blog-header {
    background: var(--primary-color);
    color: var(--white);
    padding: 3rem 0;
    text-align: center;
}

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

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.blog-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: var(--transition);
}

.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

.blog-card-image img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.blog-card-content {
    padding: 1.5rem;
}

.blog-card-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    color: #666;
}

.blog-category {
    color: var(--secondary-color);
    font-weight: 600;
}

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

.blog-card h2 a {
    color: var(--primary-color);
    text-decoration: none;
}

.blog-card h2 a:hover {
    color: var(--secondary-color);
}

.blog-read-more {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 600;
}

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

.post-header {
    margin-bottom: 2rem;
}

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

.post-meta {
    display: flex;
    gap: 2rem;
    color: #666;
    font-size: 0.875rem;
}

.post-image {
    margin: 2rem 0;
}

.post-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

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

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

.post-content h2 {
    color: var(--primary-color);
    margin: 2rem 0 1rem;
}

.post-content h3 {
    color: var(--primary-color);
    margin: 1.5rem 0 1rem;
}

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

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

.post-content .lead {
    font-size: 1.25rem;
    color: #555;
}

.post-cta {
    background: var(--light-bg);
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    margin: 3rem 0;
}

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

.post-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.post-navigation a {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 600;
}

footer {
    background: var(--primary-color);
    color: var(--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 {
    list-style: none;
}

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

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

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

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

.social-links a {
    color: var(--white);
    transition: var(--transition);
}

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

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

.cookie-consent {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--primary-color);
    color: var(--white);
    padding: 1.5rem;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
    z-index: 1000;
    display: none;
}

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

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

.cookie-content p {
    flex: 1;
}

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

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

.notification {
    position: fixed;
    top: 100px;
    right: 20px;
    padding: 1rem 1.5rem;
    background: var(--success-color);
    color: var(--white);
    border-radius: 5px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    z-index: 1001;
    display: none;
    animation: slideIn 0.3s ease;
}

.notification.show {
    display: block;
}

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

@media (max-width: 768px) {
    .nav-menu {
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero h1 {
        font-size: 1.75rem;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content,
    .product-detail-content,
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .products-grid,
    .blog-grid {
        grid-template-columns: 1fr;
    }
    
    .cookie-content {
        flex-direction: column;
        text-align: center;
    }
    
    .product-actions {
        flex-direction: column;
    }
    
    .cart-item {
        flex-direction: column;
    }
    
    .cart-item-image img {
        width: 100%;
        height: auto;
    }
}