/* CSS Variables */
:root {
    --primary-color: #0066a4;
    --primary-dark: #004d7a;
    --primary-light: #e6f3f9;
    --secondary-color: #00a67d;
    --accent-color: #ff6b35;
    --text-color: #1a1a2e;
    --text-light: #6b7280;
    --bg-color: #ffffff;
    --bg-light: #f8fafc;
    --bg-dark: #1a1a2e;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 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);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --transition: all 0.2s ease;
    --container-max: 1200px;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

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

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

ul {
    list-style: none;
}

/* Container */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 20px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    gap: 8px;
}

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

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

.btn-secondary {
    background-color: transparent;
    color: white;
    border-color: white;
}

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

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

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

.btn-sm {
    padding: 8px 16px;
    font-size: 0.875rem;
}

/* Top Bar */
.top-bar {
    background-color: var(--bg-dark);
    color: white;
    font-size: 0.85rem;
    padding: 8px 0;
}

.top-bar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.top-bar a {
    color: white;
    opacity: 0.9;
}

.top-bar a:hover {
    opacity: 1;
    color: white;
}

.top-bar-links {
    display: flex;
    align-items: center;
    gap: 10px;
}

.top-bar .separator {
    opacity: 0.5;
}

/* Header */
.main-header {
    background-color: var(--bg-color);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.logo {
    text-decoration: none;
}

.logo-text {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-color);
}

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

.search-bar {
    flex: 1;
    max-width: 500px;
    position: relative;
    display: flex;
}

.search-bar input {
    width: 100%;
    padding: 10px 45px 10px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    background-color: var(--bg-light);
    transition: var(--transition);
}

.search-bar input:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: white;
}

.search-bar button {
    position: absolute;
    right: 4px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--primary-color);
    border: none;
    color: white;
    padding: 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.search-bar button:hover {
    background: var(--primary-dark);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.header-link {
    font-weight: 500;
    color: var(--text-color);
}

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

.cart-link {
    position: relative;
    color: var(--text-color);
}

.cart-count {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--accent-color);
    color: white;
    font-size: 0.7rem;
    font-weight: 600;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-color);
    transition: var(--transition);
}

/* Navigation */
.main-nav {
    background-color: var(--primary-color);
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 0;
}

.nav-list > li {
    position: relative;
}

.nav-list > li > a {
    display: block;
    padding: 14px 20px;
    color: white;
    font-weight: 500;
    font-size: 0.95rem;
}

.nav-list > li > a:hover,
.nav-list > li > a.active {
    background-color: var(--primary-dark);
    color: white;
}

/* Dropdown */
.has-dropdown {
    position: relative;
}

.dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: white;
    min-width: 240px;
    box-shadow: var(--shadow-lg);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    z-index: 50;
}

.has-dropdown:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown li a {
    display: block;
    padding: 12px 20px;
    color: var(--text-color);
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border-color);
}

.dropdown li:last-child a {
    border-bottom: none;
    font-weight: 600;
    color: var(--primary-color);
}

.dropdown li a:hover {
    background-color: var(--bg-light);
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 500px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: -2;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 102, 164, 0.9) 0%, rgba(0, 77, 122, 0.85) 100%);
    z-index: -1;
}

.hero-content {
    text-align: center;
    color: white;
    padding: 60px 20px;
}

.hero-content h1 {
    font-size: 2.75rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.2rem;
    opacity: 0.95;
    max-width: 700px;
    margin: 0 auto 30px;
}

.hero-cta {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Features Section */
.features {
    padding: 80px 0;
    background-color: var(--bg-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.feature-card {
    text-align: center;
    padding: 30px 20px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background-color: var(--primary-light);
    border-radius: 50%;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.feature-card h3 {
    font-size: 1.15rem;
    margin-bottom: 10px;
    color: var(--text-color);
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* Section Header */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 2rem;
    color: var(--text-color);
    margin-bottom: 10px;
}

.section-header p {
    color: var(--text-light);
    font-size: 1.1rem;
}

.section-header .view-all {
    font-weight: 500;
}

/* Categories Section */
.categories {
    padding: 80px 0;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.category-card {
    display: block;
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    text-decoration: none;
}

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

.category-image {
    height: 160px;
    overflow: hidden;
}

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

/* Chemical structure images styling */
.structure-image {
    background-color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 15px;
}

.structure-image img {
    object-fit: contain;
    max-width: 90%;
    max-height: 90%;
}

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

.category-info {
    padding: 20px;
}

.category-info h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--text-color);
}

.category-info p {
    font-size: 0.875rem;
    color: var(--text-light);
}

/* Products Grid */
.featured-products {
    padding: 80px 0;
    background-color: var(--bg-light);
}

.featured-products .section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-align: left;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.product-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    box-shadow: var(--shadow-md);
}

.product-image {
    height: 180px;
    overflow: hidden;
    position: relative;
    background-color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 15px;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    max-width: 90%;
    max-height: 90%;
}

.product-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background: var(--secondary-color);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
}

.product-info {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-category {
    font-size: 0.8rem;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.product-info h3 {
    font-size: 1rem;
    margin-bottom: 8px;
    color: var(--text-color);
    line-height: 1.4;
}

.product-info p {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-bottom: 15px;
    flex: 1;
}

.product-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.product-price {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-color);
}

.product-stock {
    font-size: 0.8rem;
    color: var(--secondary-color);
}

.product-stock.low {
    color: var(--accent-color);
}

.product-actions {
    display: flex;
    gap: 10px;
}

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

/* CTA Section */
.cta-section {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    text-align: center;
}

.cta-content h2 {
    font-size: 2rem;
    margin-bottom: 15px;
}

.cta-content p {
    font-size: 1.1rem;
    opacity: 0.95;
    max-width: 600px;
    margin: 0 auto 30px;
}

/* Newsletter */
.newsletter {
    padding: 60px 0;
    background-color: var(--bg-light);
}

.newsletter-content {
    text-align: center;
    max-width: 500px;
    margin: 0 auto;
}

.newsletter-content h2 {
    font-size: 1.75rem;
    margin-bottom: 10px;
}

.newsletter-content > p {
    color: var(--text-light);
    margin-bottom: 25px;
}

.newsletter-form {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.newsletter-form input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
}

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

.newsletter-note {
    font-size: 0.8rem;
    color: var(--text-light);
}

/* Footer */
.main-footer {
    background-color: var(--bg-dark);
    color: white;
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-col h4 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: white;
}

.footer-about p {
    font-size: 0.9rem;
    opacity: 0.8;
    margin-bottom: 20px;
}

.footer-certifications {
    display: flex;
    gap: 15px;
}

.footer-certifications span {
    background: rgba(255, 255, 255, 0.1);
    padding: 5px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

.footer-col ul a:hover {
    color: white;
}

.footer-col address {
    font-style: normal;
    font-size: 0.9rem;
}

.footer-col address p {
    margin-bottom: 10px;
    opacity: 0.8;
}

.footer-col address a {
    color: rgba(255, 255, 255, 0.8);
}

.footer-col address a:hover {
    color: white;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    font-size: 0.85rem;
    opacity: 0.7;
}

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
}

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

/* Products Page Styles */
.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 50px 0;
    text-align: center;
}

.page-header h1 {
    font-size: 2.25rem;
    margin-bottom: 10px;
}

.page-header p {
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

.products-page {
    padding: 50px 0;
}

.products-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 40px;
}

.filters-sidebar {
    position: sticky;
    top: 100px;
    height: fit-content;
}

.filter-group {
    margin-bottom: 30px;
}

.filter-group h3 {
    font-size: 1rem;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.filter-group label {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
    font-size: 0.9rem;
    cursor: pointer;
}

.filter-group input[type="checkbox"] {
    accent-color: var(--primary-color);
}

.products-main .products-grid {
    grid-template-columns: repeat(3, 1fr);
}

.products-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.results-count {
    color: var(--text-light);
}

.sort-select {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
}

/* Cart Sidebar */
.cart-sidebar {
    position: fixed;
    top: 0;
    right: -400px;
    width: 400px;
    height: 100vh;
    background: white;
    box-shadow: var(--shadow-lg);
    z-index: 200;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.cart-sidebar.open {
    right: 0;
}

.cart-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.cart-header h3 {
    font-size: 1.25rem;
}

.cart-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-light);
}

.cart-items {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.cart-item {
    display: flex;
    gap: 15px;
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
}

.cart-item-image {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

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

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

.cart-item-info h4 {
    font-size: 0.9rem;
    margin-bottom: 5px;
}

.cart-item-info .price {
    font-weight: 600;
    color: var(--primary-color);
}

.cart-item-quantity {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 8px;
}

.cart-item-quantity button {
    width: 24px;
    height: 24px;
    border: 1px solid var(--border-color);
    background: white;
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.cart-item-remove {
    color: var(--text-light);
    font-size: 0.8rem;
    background: none;
    border: none;
    cursor: pointer;
}

.cart-item-remove:hover {
    color: var(--accent-color);
}

.cart-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    background: var(--bg-light);
}

.cart-total {
    display: flex;
    justify-content: space-between;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.cart-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 199;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.cart-overlay.open {
    opacity: 1;
    visibility: visible;
}

/* Contact Page */
.contact-page {
    padding: 60px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 50px;
}

.contact-info-section h2 {
    font-size: 1.5rem;
    margin-bottom: 25px;
}

.contact-card {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--primary-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    flex-shrink: 0;
}

.contact-card h3 {
    font-size: 1rem;
    margin-bottom: 5px;
}

.contact-card p,
.contact-card a {
    color: var(--text-light);
    font-size: 0.95rem;
}

.contact-form-section h2 {
    font-size: 1.5rem;
    margin-bottom: 25px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 500;
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-family: inherit;
    transition: var(--transition);
}

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

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* About Page */
.about-intro {
    padding: 80px 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h2 {
    font-size: 2rem;
    margin-bottom: 20px;
}

.about-text p {
    color: var(--text-light);
    margin-bottom: 15px;
}

.about-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.about-image img {
    width: 100%;
}

.about-values {
    padding: 80px 0;
    background: var(--bg-light);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.value-card {
    background: white;
    padding: 30px;
    border-radius: var(--radius-lg);
    text-align: center;
}

.value-card h3 {
    font-size: 1.2rem;
    margin: 20px 0 10px;
}

.value-card p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Services Page */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    padding: 80px 0;
}

.service-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 30px;
    text-align: center;
    transition: var(--transition);
}

.service-card:hover {
    box-shadow: var(--shadow-md);
}

.service-icon {
    width: 70px;
    height: 70px;
    background: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--primary-color);
}

.service-card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.service-card p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

/* Resources Page */
.resources-page {
    padding: 60px 0;
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.resource-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 30px;
    display: flex;
    gap: 20px;
}

.resource-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    flex-shrink: 0;
}

.resource-card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.resource-card p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 12px;
}

/* Alert Messages */
.alert {
    padding: 15px 20px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .features-grid,
    .categories-grid,
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .filters-sidebar {
        position: static;
        display: flex;
        flex-wrap: wrap;
        gap: 20px;
    }

    .filter-group {
        flex: 1 1 200px;
    }

    .products-main .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

    .values-grid,
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .top-bar-content {
        justify-content: center;
        text-align: center;
    }

    .top-bar-links {
        display: none;
    }

    .search-bar {
        display: none;
    }

    .header-actions {
        gap: 15px;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .main-nav {
        position: fixed;
        top: 0;
        left: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: white;
        z-index: 200;
        transition: var(--transition);
        padding-top: 60px;
    }

    .main-nav.open {
        left: 0;
    }

    .nav-list {
        flex-direction: column;
    }

    .nav-list > li > a {
        color: var(--text-color);
        border-bottom: 1px solid var(--border-color);
    }

    .nav-list > li > a:hover,
    .nav-list > li > a.active {
        background-color: var(--primary-light);
        color: var(--primary-color);
    }

    .dropdown {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        display: none;
        background: var(--bg-light);
    }

    .has-dropdown.open .dropdown {
        display: block;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .features-grid,
    .categories-grid,
    .products-grid,
    .values-grid,
    .services-grid,
    .resources-grid {
        grid-template-columns: 1fr;
    }

    .products-main .products-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .newsletter-form {
        flex-direction: column;
    }

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

    .cart-sidebar {
        width: 100%;
        right: -100%;
    }

    .featured-products .section-header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }