/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #3B82F6;
    --primary-dark: #2563EB;
    --primary-light: #60A5FA;
    --secondary-color: #14B8A6;
    --accent-color: #F97316;
    --success-color: #10B981;
    --warning-color: #F59E0B;
    --error-color: #EF4444;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    --white: #FFFFFF;
    --black: #000000;
    --spacing: 8px;
    --radius: 8px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--gray-700);
    background-color: var(--white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--gray-900);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: calc(var(--spacing) * 1.5) calc(var(--spacing) * 3);
    border: none;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

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

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

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

.btn-accent:hover {
    background-color: #EA580C;
    transform: translateY(-1px);
}

.btn-large {
    padding: calc(var(--spacing) * 2) calc(var(--spacing) * 4);
    font-size: 1rem;
}

/* Header */
.header {
    background-color: var(--white);
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: calc(var(--spacing) * 2) 0;
}

.logo h1 {
    color: var(--primary-color);
    font-size: 1.5rem;
    font-weight: 700;
}

.nav-menu {
    display: flex;
    gap: calc(var(--spacing) * 4);
}

.nav-link {
    color: var(--gray-600);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--primary-color);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing) * 2);
}

.search-btn,
.cart-btn {
    background: none;
    border: none;
    color: var(--gray-600);
    cursor: pointer;
    padding: var(--spacing);
    border-radius: var(--radius);
    transition: var(--transition);
    position: relative;
}

.search-btn:hover,
.cart-btn:hover {
    color: var(--primary-color);
    background-color: var(--gray-50);
}

.cart-count {
    position: absolute;
    top: -4px;
    right: -4px;
    background-color: var(--accent-color);
    color: var(--white);
    font-size: 0.75rem;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 18px;
    text-align: center;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing);
}

.mobile-menu-btn span {
    width: 20px;
    height: 2px;
    background-color: var(--gray-600);
    margin: 2px 0;
    transition: var(--transition);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background-color: var(--white);
    box-shadow: var(--shadow-lg);
    z-index: 1001;
    transition: right 0.3s ease;
    padding-top: calc(var(--spacing) * 10);
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu-content {
    padding: calc(var(--spacing) * 3);
}

.mobile-nav-link {
    display: block;
    color: var(--gray-700);
    text-decoration: none;
    padding: calc(var(--spacing) * 2) 0;
    font-weight: 500;
    border-bottom: 1px solid var(--gray-100);
}

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    padding: calc(var(--spacing) * 10) 0;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: calc(var(--spacing) * 8);
    align-items: center;
}

.hero-text h1 {
    font-size: 3rem;
    margin-bottom: calc(var(--spacing) * 3);
    color: var(--gray-900);
}

.hero-text p {
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-bottom: calc(var(--spacing) * 4);
}

.hero-cta {
    display: flex;
    gap: calc(var(--spacing) * 2);
    flex-wrap: wrap;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: calc(var(--radius) * 2);
    box-shadow: var(--shadow-lg);
}

/* Promo Banner */
.promo-banner {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: calc(var(--spacing) * 4) 0;
}

.promo-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: calc(var(--spacing) * 4);
}

.promo-text h3 {
    color: var(--white);
    margin-bottom: var(--spacing);
}

.promo-text p {
    opacity: 0.9;
}

/* Catalog Controls */
.catalog-controls {
    padding: calc(var(--spacing) * 6) 0 calc(var(--spacing) * 3) 0;
    border-bottom: 1px solid var(--gray-200);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing);
    margin-bottom: calc(var(--spacing) * 3);
    font-size: 0.875rem;
}

.breadcrumb a {
    color: var(--gray-500);
    text-decoration: none;
}

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

.breadcrumb span:last-child {
    color: var(--gray-700);
    font-weight: 500;
}

.controls-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: calc(var(--spacing) * 2);
}

.controls-bar h2 {
    font-size: 1.5rem;
}

.controls-right {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing) * 2);
}

.sort-select {
    padding: var(--spacing) calc(var(--spacing) * 2);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    background-color: var(--white);
    color: var(--gray-700);
    font-size: 0.875rem;
    cursor: pointer;
}

.filter-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing);
    padding: var(--spacing) calc(var(--spacing) * 2);
    background-color: var(--gray-100);
    border: 1px solid var(--gray-300);
    color: var(--gray-700);
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
}

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

/* Main Content Layout */
.main-content {
    padding: calc(var(--spacing) * 4) 0;
}

.content-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: calc(var(--spacing) * 4);
}

/* Filter Sidebar */
.filter-sidebar {
    background-color: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: calc(var(--spacing) * 3);
    height: fit-content;
    position: sticky;
    top: 100px;
}

.filter-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: calc(var(--spacing) * 3);
    padding-bottom: calc(var(--spacing) * 2);
    border-bottom: 1px solid var(--gray-200);
}

.close-filter {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray-500);
}

.filter-group {
    margin-bottom: calc(var(--spacing) * 4);
}

.filter-group h4 {
    margin-bottom: calc(var(--spacing) * 2);
    color: var(--gray-800);
    font-size: 1rem;
}

.filter-options {
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing));
}

.filter-option {
    display: flex;
    align-items: center;
    gap: var(--spacing);
    cursor: pointer;
    font-size: 0.875rem;
}

.filter-option input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--primary-color);
}

.price-range {
    margin-top: calc(var(--spacing) * 2);
}

.price-range input[type="range"] {
    width: 100%;
    accent-color: var(--primary-color);
    margin-bottom: calc(var(--spacing) * 2);
}

.price-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--gray-500);
}

.rating-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing);
}

.rating-option {
    display: flex;
    align-items: center;
    gap: var(--spacing);
    cursor: pointer;
    font-size: 0.875rem;
}

.rating-option input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--primary-color);
}

.stars {
    color: var(--warning-color);
}

.filter-actions {
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing) * 2);
    margin-top: calc(var(--spacing) * 4);
    padding-top: calc(var(--spacing) * 3);
    border-top: 1px solid var(--gray-200);
}

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

/* Products Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: calc(var(--spacing) * 3);
    margin-bottom: calc(var(--spacing) * 6);
}

.product-card {
    background-color: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: calc(var(--radius) * 2);
    overflow: hidden;
    transition: var(--transition);
    position: relative;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.product-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 1;
}

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

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-badge {
    position: absolute;
    top: calc(var(--spacing) * 2);
    left: calc(var(--spacing) * 2);
    padding: calc(var(--spacing) / 2) calc(var(--spacing) * 1.5);
    border-radius: calc(var(--radius) * 2);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--white);
}

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

.badge-bestseller {
    background-color: var(--success-color);
}

.badge-new {
    background-color: var(--warning-color);
}

.product-info {
    padding: calc(var(--spacing) * 3);
}

.product-name {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing);
    color: var(--gray-900);
}

.product-features {
    display: flex;
    gap: var(--spacing);
    margin-bottom: calc(var(--spacing) * 2);
    flex-wrap: wrap;
}

.feature-tag {
    background-color: var(--gray-100);
    color: var(--gray-600);
    padding: calc(var(--spacing) / 2) var(--spacing);
    border-radius: calc(var(--radius) / 2);
    font-size: 0.75rem;
}

.product-rating {
    display: flex;
    align-items: center;
    gap: var(--spacing);
    margin-bottom: calc(var(--spacing) * 2);
}

.rating-stars {
    color: var(--warning-color);
    font-size: 0.875rem;
}

.rating-count {
    color: var(--gray-500);
    font-size: 0.75rem;
}

.product-price {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing) * 2);
    margin-bottom: calc(var(--spacing) * 3);
}

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

.original-price {
    font-size: 1rem;
    color: var(--gray-400);
    text-decoration: line-through;
}

.buy-btn {
    width: 100%;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    padding: calc(var(--spacing) * 1.5);
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

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

/* Load More */
.load-more {
    text-align: center;
    margin-top: calc(var(--spacing) * 6);
}

/* Features Section */
.features {
    background-color: var(--gray-50);
    padding: calc(var(--spacing) * 10) 0;
}

.features h2 {
    text-align: center;
    margin-bottom: calc(var(--spacing) * 8);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: calc(var(--spacing) * 4);
}

.feature-card {
    background-color: var(--white);
    padding: calc(var(--spacing) * 4);
    border-radius: calc(var(--radius) * 2);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    color: var(--primary-color);
    margin-bottom: calc(var(--spacing) * 3);
}

.feature-card h3 {
    margin-bottom: calc(var(--spacing) * 2);
}

/* Testimonials */
.testimonials {
    padding: calc(var(--spacing) * 10) 0;
}

.testimonials h2 {
    text-align: center;
    margin-bottom: calc(var(--spacing) * 8);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: calc(var(--spacing) * 4);
}

.testimonial-card {
    background-color: var(--white);
    padding: calc(var(--spacing) * 4);
    border-radius: calc(var(--radius) * 2);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.testimonial-rating {
    color: var(--warning-color);
    font-size: 1.125rem;
    margin-bottom: calc(var(--spacing) * 2);
}

.testimonial-card p {
    font-style: italic;
    margin-bottom: calc(var(--spacing) * 3);
    color: var(--gray-600);
}

.testimonial-author strong {
    color: var(--gray-900);
    display: block;
}

.testimonial-author span {
    color: var(--gray-500);
    font-size: 0.875rem;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: calc(var(--spacing) * 10) 0;
    text-align: center;
}

.cta-content h2 {
    color: var(--white);
    margin-bottom: calc(var(--spacing) * 3);
}

.cta-content p {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: calc(var(--spacing) * 4);
}

/* Footer */
.footer {
    background-color: var(--gray-900);
    color: var(--gray-300);
    padding: calc(var(--spacing) * 8) 0 calc(var(--spacing) * 4) 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: calc(var(--spacing) * 6);
    margin-bottom: calc(var(--spacing) * 6);
}

.footer-section h3,
.footer-section h4 {
    color: var(--white);
    margin-bottom: calc(var(--spacing) * 3);
}

.footer-section p {
    margin-bottom: calc(var(--spacing) * 2);
}

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

.footer-section ul li {
    margin-bottom: var(--spacing);
}

.footer-section ul li a {
    color: var(--gray-300);
    text-decoration: none;
    transition: var(--transition);
}

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

.social-links {
    display: flex;
    gap: calc(var(--spacing) * 2);
    margin-top: calc(var(--spacing) * 3);
}

.social-links a {
    color: var(--gray-400);
    transition: var(--transition);
}

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

.contact-info p {
    margin-bottom: var(--spacing);
    font-size: 0.875rem;
}

.footer-bottom {
    text-align: center;
    padding-top: calc(var(--spacing) * 4);
    border-top: 1px solid var(--gray-700);
    color: var(--gray-400);
    font-size: 0.875rem;
}

/* Filter Overlay */
.filter-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.filter-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .content-layout {
        grid-template-columns: 1fr;
    }
    
    .filter-sidebar {
        position: fixed;
        top: 0;
        left: -100%;
        width: 320px;
        height: 100vh;
        z-index: 1000;
        transition: left 0.3s ease;
        overflow-y: auto;
    }
    
    .filter-sidebar.active {
        left: 0;
    }
    
    .close-filter {
        display: block;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: calc(var(--spacing) * 4);
        text-align: center;
    }
    
    .promo-content {
        flex-direction: column;
        text-align: center;
    }
    
    .controls-bar {
        flex-direction: column;
        align-items: stretch;
        gap: calc(var(--spacing) * 3);
    }
    
    .controls-right {
        justify-content: space-between;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero-text h1 {
        font-size: 2rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        gap: calc(var(--spacing) * 2);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: calc(var(--spacing) * 3);
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
        gap: calc(var(--spacing) * 3);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: calc(var(--spacing) * 4);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 calc(var(--spacing) * 2);
    }
    
    .header-content {
        padding: calc(var(--spacing) * 1.5) 0;
    }
    
    .hero {
        padding: calc(var(--spacing) * 6) 0;
    }
    
    .hero-text h1 {
        font-size: 1.75rem;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .product-card {
        max-width: 100%;
    }
    
    .promo-banner {
        padding: calc(var(--spacing) * 3) 0;
    }
    
    .features,
    .testimonials,
    .cta-section {
        padding: calc(var(--spacing) * 6) 0;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.product-card {
    animation: fadeInUp 0.6s ease forwards;
}

.product-card:nth-child(1) { animation-delay: 0.1s; }
.product-card:nth-child(2) { animation-delay: 0.2s; }
.product-card:nth-child(3) { animation-delay: 0.3s; }
.product-card:nth-child(4) { animation-delay: 0.4s; }

/* Utility Classes */
.hidden {
    display: none !important;
}

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

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing); }
.mb-2 { margin-bottom: calc(var(--spacing) * 2); }
.mb-3 { margin-bottom: calc(var(--spacing) * 3); }
.mb-4 { margin-bottom: calc(var(--spacing) * 4); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing); }
.mt-2 { margin-top: calc(var(--spacing) * 2); }
.mt-3 { margin-top: calc(var(--spacing) * 3); }
.mt-4 { margin-top: calc(var(--spacing) * 4); }