:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #64748b;
    --success-color: #22c55e;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-color: #ffffff;
    --bg-secondary: #f8fafc;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

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

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

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

.header {
    background: var(--bg-color);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

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

.logo svg {
    color: var(--primary-color);
}

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

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

.nav-link:hover {
    color: var(--primary-color);
}

.nav-link.active {
    color: var(--primary-color);
}

.cart-badge {
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    padding: 0.125rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    min-width: 20px;
    text-align: center;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.5rem;
}

.hero {
    position: relative;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    background-image: url('/assets/images/hero-banner.jpg');
    background-size: cover;
    background-position: center;
    color: white;
    text-align: center;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.85) 0%, rgba(30, 64, 175, 0.85) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

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

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

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

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

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

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

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

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

.btn-block {
    width: 100%;
    display: block;
    margin-bottom: 0.75rem;
}

.featured-section, .benefits-section, .cta-section, .catalog-section, .product-section, .cart-section, .thankyou-section {
    padding: 4rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

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

.product-card {
    background: var(--bg-color);
    border-radius: 0.75rem;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s;
}

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

.product-image {
    position: relative;
    width: 100%;
    height: 300px;
    overflow: hidden;
}

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

.product-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--warning-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 700;
}

.product-info {
    padding: 1.25rem;
}

.product-title a {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    display: block;
    margin-bottom: 0.5rem;
}

.product-title a:hover {
    color: var(--primary-color);
}

.product-author {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0.75rem;
}

.product-rating {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    margin-bottom: 1rem;
}

.star {
    color: var(--border-color);
}

.star.filled {
    color: var(--warning-color);
}

.rating-value {
    margin-left: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.product-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 1rem;
}

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

.benefits-section {
    background: var(--bg-secondary);
}

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

.benefit-card {
    text-align: center;
    padding: 2rem;
}

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

.benefit-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.benefit-card p {
    color: var(--text-secondary);
}

.cta-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
}

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

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

.cta-content p {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.footer {
    background: var(--text-primary);
    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 h3, .footer-section h4 {
    margin-bottom: 1rem;
}

.footer-section p {
    opacity: 0.8;
    line-height: 1.8;
}

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

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

.footer-section ul li a {
    color: white;
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s;
}

.footer-section ul li a:hover {
    opacity: 1;
}

.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);
}

.contact-info p {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    opacity: 0.9;
}

.contact-info a {
    color: white;
    text-decoration: none;
}

.contact-info a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.8;
}

.catalog-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

.filters-sidebar {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 0.75rem;
    height: fit-content;
    position: sticky;
    top: 100px;
}

.filter-group {
    margin-bottom: 2rem;
}

.filter-group h3 {
    font-size: 1.125rem;
    margin-bottom: 1rem;
}

.search-box {
    position: relative;
}

.search-box input {
    width: 100%;
    padding: 0.75rem 2.5rem 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 0.875rem;
}

.search-box svg {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.filter-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.filter-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.filter-option input {
    cursor: pointer;
}

.sort-select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 0.875rem;
    cursor: pointer;
}

.catalog-info {
    margin-bottom: 1.5rem;
}

.no-results {
    text-align: center;
    padding: 4rem 2rem;
}

.no-results svg {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.no-results h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.no-results p {
    color: var(--text-secondary);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.breadcrumb a {
    color: var(--text-secondary);
    text-decoration: none;
}

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

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

.product-gallery {
    position: sticky;
    top: 100px;
    height: fit-content;
}

.main-image img {
    width: 100%;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-lg);
}

.product-name {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.product-author-large {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.product-rating-large {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.rating-text {
    font-size: 1.125rem;
    font-weight: 600;
}

.review-count {
    color: var(--text-secondary);
}

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

.product-category {
    margin-bottom: 1rem;
}

.category-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 0.875rem;
}

.product-stock {
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.stock-available {
    color: var(--success-color);
}

.stock-limited {
    color: var(--warning-color);
}

.stock-out {
    color: var(--danger-color);
}

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

.quantity-selector {
    display: flex;
    align-items: center;
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    overflow: hidden;
}

.qty-btn {
    background: var(--bg-secondary);
    border: none;
    padding: 0.75rem 1.25rem;
    font-size: 1.25rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.3s;
}

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

.quantity-selector input {
    border: none;
    width: 60px;
    text-align: center;
    font-size: 1.125rem;
    font-weight: 600;
    padding: 0.75rem 0;
}

.product-description {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 0.75rem;
    margin-top: 2rem;
}

.product-description h3 {
    margin-bottom: 1rem;
}

.product-reviews-section {
    margin-top: 3rem;
}

.product-reviews-section h2 {
    margin-bottom: 2rem;
}

.reviews-summary {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 0.75rem;
    margin-bottom: 2rem;
}

.summary-rating {
    text-align: center;
}

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

.reviews-list {
    display: grid;
    gap: 1.5rem;
}

.review-card {
    background: var(--bg-color);
    padding: 1.5rem;
    border-radius: 0.75rem;
    border: 2px solid var(--border-color);
}

.review-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.review-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
}

.review-stars {
    display: flex;
    gap: 0.125rem;
    margin-top: 0.25rem;
}

.review-date {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.review-comment {
    line-height: 1.8;
}

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

.empty-cart svg {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.empty-cart h2 {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.empty-cart p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.cart-layout {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 2rem;
    margin-top: 2rem;
}

.cart-item {
    display: grid;
    grid-template-columns: 100px 1fr auto;
    gap: 1.5rem;
    padding: 1.5rem;
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: 0.75rem;
    margin-bottom: 1rem;
}

.cart-item-image img {
    width: 100%;
    border-radius: 0.5rem;
}

.cart-item-details h3 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.cart-item-details p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

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

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

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

.cart-qty-btn {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    width: 32px;
    height: 32px;
    border-radius: 0.25rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
}

.cart-qty-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.cart-qty-value {
    font-weight: 600;
    min-width: 30px;
    text-align: center;
}

.remove-item {
    background: none;
    border: none;
    color: var(--danger-color);
    cursor: pointer;
    font-size: 0.875rem;
    text-decoration: underline;
}

.cart-summary {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 0.75rem;
    height: fit-content;
    position: sticky;
    top: 100px;
}

.cart-summary h3 {
    margin-bottom: 1.5rem;
}

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

.summary-divider {
    border-top: 2px solid var(--border-color);
    margin: 1.5rem 0;
}

.summary-total {
    font-size: 1.25rem;
    font-weight: 700;
}

.shipping-free {
    color: var(--success-color);
    font-weight: 600;
}

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

.thankyou-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.order-info-box {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 0.75rem;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.order-details {
    margin-top: 1rem;
}

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

.detail-row:last-child {
    border-bottom: none;
}

.thankyou-message {
    margin: 3rem 0;
}

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

.step-card {
    text-align: center;
}

.step-number {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1rem;
}

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

.social-share {
    margin-top: 3rem;
}

.share-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 1rem;
}

.share-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--bg-secondary);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
}

.share-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: scale(1.1);
}

@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-color);
        flex-direction: column;
        padding: 1rem;
        box-shadow: var(--shadow-lg);
    }

    .nav.active {
        display: flex;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 1rem;
    }

    .catalog-layout {
        grid-template-columns: 1fr;
    }

    .filters-sidebar {
        position: static;
    }

    .product-detail {
        grid-template-columns: 1fr;
    }

    .product-gallery {
        position: static;
    }

    .cart-layout {
        grid-template-columns: 1fr;
    }

    .cart-summary {
        position: static;
    }

    .cart-item {
        grid-template-columns: 80px 1fr;
    }

    .cart-item-actions {
        grid-column: 1 / -1;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }

    .thankyou-actions {
        flex-direction: column;
    }

    .thankyou-actions .btn {
        width: 100%;
    }

    .steps-grid {
        grid-template-columns: 1fr;
    }
}

.notification {
    position: fixed;
    top: 100px;
    right: 20px;
    background: var(--success-color);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow-xl);
    z-index: 2000;
    animation: slideIn 0.3s ease;
}

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

.catalog-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.catalog-header p {
    color: var(--text-secondary);
    font-size: 1.125rem;
}