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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --text-color: #1f2937;
    --bg-color: #ffffff;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-600: #4b5563;
    --gray-800: #1f2937;
    --success-color: #10b981;
    --error-color: #ef4444;
    --font-size-base: 16px;
}

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

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

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

/* Header & Navigation */
header {
    background-color: var(--bg-color);
    box-shadow: 0 2px 4px 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(--text-color);
    font-size: 1.5rem;
    font-weight: bold;
}

.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: color 0.3s;
    display: flex;
    align-items: center;
    gap: 5px;
}

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

.cart-count {
    background-color: var(--primary-color);
    color: white;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.875rem;
}

.font-increase-btn {
    background-color: var(--gray-100);
    border: none;
    padding: 8px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: background-color 0.3s;
}

.font-increase-btn:hover {
    background-color: var(--gray-200);
}

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

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

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

.cta-button {
    display: inline-block;
    background-color: white;
    color: var(--primary-color);
    padding: 1rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.3s, box-shadow 0.3s;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

/* Features Section */
.features {
    padding: 4rem 0;
    background-color: var(--gray-100);
}

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

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

.feature-card {
    background-color: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
}

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

.feature-card h3 {
    margin-bottom: 1rem;
}

.stats {
    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: bold;
    color: var(--primary-color);
}

.stat-label {
    color: var(--gray-600);
    margin-top: 0.5rem;
}

/* About Courses Section */
.about-courses {
    padding: 4rem 0;
}

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

.about-text p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
    text-align: justify;
}

/* Mistakes Section */
.mistakes-section {
    padding: 4rem 0;
    background-color: var(--gray-100);
}

.mistakes-section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
}

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

.mistake-card {
    background-color: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.mistake-number {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.mistake-card h3 {
    margin-bottom: 1rem;
}

/* Catalog Section */
.catalog {
    padding: 4rem 0;
}

.catalog h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
}

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

.product-card {
    background-color: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px 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: 0.5rem;
}

.product-description {
    color: var(--gray-600);
    margin-bottom: 1rem;
}

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

.product-button {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    transition: background-color 0.3s;
}

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

/* Product Detail Page */
.product-detail {
    padding: 4rem 0;
}

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

.product-detail-image img {
    width: 100%;
    border-radius: 12px;
}

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

.product-description-full h3 {
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

.product-description-full ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

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

.btn-primary, .btn-secondary {
    padding: 1rem 2rem;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

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

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

.btn-secondary:hover {
    background-color: var(--gray-100);
}

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

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

.empty-cart svg {
    color: var(--gray-300);
    margin-bottom: 1rem;
}

.empty-cart p {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: 2rem;
}

.cart-items {
    background-color: white;
    border-radius: 12px;
    padding: 2rem;
}

.cart-item {
    display: flex;
    gap: 2rem;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--gray-200);
}

.cart-item:last-child {
    border-bottom: none;
}

.cart-item-info h3 {
    margin-bottom: 0.5rem;
}

.cart-item-price {
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-top: 0.5rem;
}

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

.cart-summary {
    background-color: var(--gray-100);
    padding: 2rem;
    border-radius: 12px;
    margin-top: 2rem;
}

.cart-total {
    display: flex;
    justify-content: space-between;
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

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

/* Checkout Page */
.checkout-page {
    padding: 4rem 0;
}

.checkout-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
}

.checkout-form-section h2,
.checkout-summary h2 {
    margin-bottom: 1.5rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    font-size: 1rem;
}

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

.checkout-summary {
    background-color: var(--gray-100);
    padding: 2rem;
    border-radius: 12px;
    height: fit-content;
}

.checkout-item {
    display: flex;
    justify-content: space-between;
    padding: 1rem 0;
    border-bottom: 1px solid var(--gray-300);
}

.checkout-total {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 2px solid var(--gray-600);
}

.total-row {
    display: flex;
    justify-content: space-between;
    font-size: 1.25rem;
    font-weight: bold;
}

/* Success Page */
.success-page {
    padding: 4rem 0;
    min-height: 60vh;
}

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

.success-icon {
    margin-bottom: 2rem;
}

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

.success-message {
    font-size: 1.125rem;
    margin-bottom: 1rem;
}

.success-info {
    color: var(--gray-600);
    margin-bottom: 2rem;
}

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

/* Contact Page */
.contact-page {
    padding: 4rem 0;
}

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

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

.contact-icon {
    color: var(--primary-color);
}

.contact-details h3 {
    margin-bottom: 0.5rem;
}

.contact-details a {
    color: var(--primary-color);
    text-decoration: none;
}

.contact-form {
    background-color: var(--gray-100);
    padding: 2rem;
    border-radius: 12px;
}

/* About Page */
.about-page {
    padding: 4rem 0;
}

.about-intro {
    max-width: 800px;
    margin: 0 auto 4rem;
    text-align: center;
}

.about-intro p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

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

.team-card {
    background-color: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    text-align: center;
}

.team-card img {
    width: 100%;
    height: 300px;
    object-fit: cover;
}

.team-card h3 {
    padding: 1rem 1rem 0.5rem;
}

.team-position {
    color: var(--primary-color);
    font-weight: 600;
    padding: 0 1rem;
}

.team-bio {
    padding: 1rem;
    color: var(--gray-600);
}

.about-values {
    margin-top: 4rem;
}

.about-values h2 {
    text-align: center;
    margin-bottom: 2rem;
}

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

.value-item {
    background-color: var(--gray-100);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
}

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

/* Footer */
footer {
    background-color: var(--gray-800);
    color: white;
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

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

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

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

.social-links a {
    color: white;
    transition: color 0.3s;
}

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

.footer-links {
    list-style: none;
}

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

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

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

/* Cookie Consent */
.cookie-consent {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--gray-800);
    color: white;
    padding: 1.5rem;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
    z-index: 2000;
    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(--primary-color);
}

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

.cookie-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
}

.cookie-btn.accept {
    background-color: var(--success-color);
    color: white;
}

.cookie-btn.decline {
    background-color: var(--gray-600);
    color: white;
}

/* Notification */
.notification {
    position: fixed;
    top: 80px;
    right: 20px;
    background-color: var(--success-color);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    z-index: 3000;
    display: none;
    animation: slideIn 0.3s ease-out;
}

.notification.show {
    display: block;
}

.notification.error {
    background-color: var(--error-color);
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        flex-wrap: wrap;
        gap: 1rem;
    }
    
    .hero-content h1 {
        font-size: 1.75rem;
    }
    
    .product-detail-grid,
    .checkout-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .cookie-content {
        flex-direction: column;
        text-align: center;
    }
    
    .cookie-buttons {
        width: 100%;
        justify-content: center;
    }
}