/*
Theme Name: Research Peptides Store
Theme URI: https://yourstore.com
Description: A professional WooCommerce theme for research peptides. Clean design with black, white, and red color scheme. Optimized for mobile and SEO.
Version: 1.0.0
Author: Discovery Research
Author URI: https://yourstore.com
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: modern-commerce
Tags: e-commerce, woocommerce, peptides, research, responsive, minimal, modern
*/

/* ===================================
   CSS Variables & Global Styles
   =================================== */

:root {
    --color-primary: #000000;      /* Black */
    --color-secondary: #FFFFFF;    /* White */
    --color-accent: #DC0000;       /* Red */
    --color-accent-hover: #B00000; /* Darker Red */
    --color-text: #333333;
    --color-text-light: #666666;
    --color-border: #E0E0E0;
    --color-bg-light: #F8F8F8;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --transition: all 0.3s ease;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.2);
}

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

body {
    font-family: var(--font-main);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-secondary);
    overflow-x: hidden;
}

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

a:hover {
    color: var(--color-accent);
}

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

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

/* ===================================
   Header & Navigation
   =================================== */

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

.site-header img {
    max-height: 50px !important;
    width: auto !important;
    height: auto !important;
}

.header-top {
    background: var(--color-accent);
    padding: 8px 0;
    text-align: center;
    font-size: 14px;
}

.header-main {
    padding: 20px 0;
    max-height: 90px;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    max-height: 70px;
}

.site-logo {
    display: flex;
    align-items: center;
    max-height: 50px;
    overflow: hidden;
}

.site-logo a {
    display: block;
    line-height: 0;
    max-height: 50px;
}

.site-logo-img,
.site-logo img,
img.site-logo-img {
    height: 50px !important;
    max-height: 50px !important;
    width: auto !important;
    max-width: 250px !important;
    transition: var(--transition);
    object-fit: contain !important;
}

.site-logo a:hover .site-logo-img {
    opacity: 0.9;
}

.main-navigation ul {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.main-navigation a {
    color: var(--color-secondary);
    font-weight: 500;
    text-transform: uppercase;
    font-size: 14px;
    letter-spacing: 0.5px;
}

.main-navigation a:hover {
    color: var(--color-accent);
}

.header-cart {
    display: flex;
    align-items: center;
    margin-left: 20px;
}

.header-cart .cart-link {
    position: relative;
    color: var(--color-secondary);
    display: flex;
    align-items: center;
    padding: 8px;
    transition: var(--transition);
}

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

.header-cart .cart-link svg {
    width: 24px;
    height: 24px;
}

.cart-icon {
    position: relative;
}

.cart-count,
.header-cart .cart-count {
    position: absolute;
    top: -4px;
    right: -4px;
    background: var(--color-accent);
    color: var(--color-secondary);
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    line-height: 1;
}

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-secondary);
    font-size: 24px;
    cursor: pointer;
}

/* ===================================
   Hero Section
   =================================== */

.hero-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, #1a1a1a 100%);
    color: var(--color-secondary);
    padding: 80px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 10px,
        rgba(220, 0, 0, 0.03) 10px,
        rgba(220, 0, 0, 0.03) 20px
    );
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero-section h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-section .accent-text {
    color: var(--color-accent);
}

.hero-section p {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

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

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

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

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

/* ===================================
   Products Section
   =================================== */

.products-section {
    padding: 80px 20px;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 10px;
}

.section-title .title-accent {
    color: var(--color-accent);
}

.section-title p {
    color: var(--color-text-light);
    font-size: 18px;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.product-card {
    background: var(--color-secondary);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition);
    position: relative;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0,0,0,0.18);
    border-color: var(--color-accent);
}

.product-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 1/1;
    background: linear-gradient(135deg, #f8f8f8 0%, #f0f0f0 100%);
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.08);
}

.product-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: var(--color-accent);
    color: var(--color-secondary);
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    border-radius: 6px;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 12px rgba(220, 0, 0, 0.4);
    z-index: 10;
}

.product-info {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.product-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--color-primary);
    line-height: 1.3;
    min-height: 52px;
}

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

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

.product-price {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.product-price del {
    font-size: 20px;
    color: var(--color-text-light);
    font-weight: 400;
    text-decoration: line-through;
}

.product-price ins {
    text-decoration: none;
}

.add-to-cart-btn,
.button.add_to_cart_button,
.button.product_type_simple {
    width: 100%;
    padding: 14px 20px;
    background: var(--color-primary);
    color: var(--color-secondary);
    border: 2px solid var(--color-primary);
    font-weight: 600;
    text-transform: uppercase;
    cursor: pointer;
    transition: var(--transition);
    border-radius: 6px;
    font-size: 16px;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: auto;
}

.add-to-cart-btn:hover,
.button.add_to_cart_button:hover,
.button.product_type_simple:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(220, 0, 0, 0.3);
}

/* ===================================
   WooCommerce Shop/Archive Pages
   =================================== */

.woocommerce ul.products,
.woocommerce .products,
.woocommerce-page .products,
ul.products.columns-4,
ul.products.columns-3,
ul.products.columns-2,
ul.products {
    display: grid !important;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)) !important;
    gap: 30px !important;
    margin: 0 !important;
    padding: 0 !important;
    list-style: none !important;
    width: 100% !important;
}

.woocommerce ul.products li.product,
.woocommerce-page ul.products li.product {
    width: 100% !important;
    float: none !important;
    margin: 0 !important;
}

.woocommerce ul.products li.product {
    background: var(--color-secondary);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition);
    position: relative;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    margin: 0;
    padding: 0;
}

.woocommerce ul.products li.product:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0,0,0,0.18);
    border-color: var(--color-accent);
}

.woocommerce ul.products li.product img {
    width: 100%;
    height: auto;
    aspect-ratio: 1/1;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.woocommerce ul.products li.product:hover img {
    transform: scale(1.08);
}

.woocommerce ul.products li.product .woocommerce-loop-product__title,
.woocommerce ul.products li.product h2,
.woocommerce ul.products li.product h3 {
    font-size: 20px;
    font-weight: 600;
    margin: 0 0 12px 0;
    padding: 0 24px;
    color: var(--color-primary);
    line-height: 1.3;
}

.woocommerce ul.products li.product .price {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-accent);
    margin: 0 0 18px 0;
    padding: 0 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.woocommerce ul.products li.product .price del {
    font-size: 20px;
    color: var(--color-text-light);
    font-weight: 400;
}

.woocommerce ul.products li.product .price ins {
    text-decoration: none;
}

.woocommerce ul.products li.product a.button,
.woocommerce ul.products li.product button.button {
    width: calc(100% - 48px);
    padding: 14px 20px;
    background: var(--color-primary);
    color: var(--color-secondary);
    border: 2px solid var(--color-primary);
    font-weight: 600;
    text-transform: uppercase;
    cursor: pointer;
    transition: var(--transition);
    border-radius: 6px;
    font-size: 16px;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin: 0 24px 24px 24px;
    text-align: center;
}

.woocommerce ul.products li.product a.button:hover,
.woocommerce ul.products li.product button.button:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(220, 0, 0, 0.3);
}

/* WooCommerce Results Count and Ordering */
.woocommerce-result-count,
.woocommerce-ordering {
    margin-bottom: 20px;
}

.woocommerce-ordering select {
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    background: var(--color-secondary);
    color: var(--color-text);
    cursor: pointer;
}

/* WooCommerce Messages */
.woocommerce-message,
.woocommerce-info,
.woocommerce-error {
    padding: 15px 20px;
    margin-bottom: 20px;
    border-radius: 6px;
    border-left: 4px solid var(--color-accent);
    background: #f8f8f8;
}

.woocommerce-message a.button,
.woocommerce-info a.button {
    margin-left: 10px;
    padding: 8px 16px;
    background: var(--color-primary);
    color: var(--color-secondary);
    text-decoration: none;
    border-radius: 4px;
    font-size: 14px;
}

.woocommerce-message a.button:hover {
    background: var(--color-accent);
}

/* ===================================
   Single Product Page
   =================================== */

.single-product-container {
    padding: 60px 20px;
}

.product-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    max-width: 1200px;
    margin: 0 auto;
}

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

.main-image {
    border: 1px solid var(--color-border);
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 20px;
}

.thumbnail-images {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.thumbnail {
    border: 2px solid var(--color-border);
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
}

.thumbnail:hover,
.thumbnail.active {
    border-color: var(--color-accent);
}

.product-summary h1 {
    font-size: 32px;
    margin-bottom: 15px;
}

.product-meta {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--color-border);
}

.star-rating {
    color: #FFD700;
}

.product-description {
    margin-bottom: 30px;
    line-height: 1.8;
}

.product-form {
    background: var(--color-bg-light);
    padding: 30px;
    border-radius: 8px;
}

.quantity-selector {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.quantity-input {
    display: flex;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    overflow: hidden;
}

.quantity-input button {
    width: 40px;
    height: 40px;
    background: var(--color-secondary);
    border: none;
    cursor: pointer;
    font-size: 18px;
}

.quantity-input button:hover {
    background: var(--color-bg-light);
}

.quantity-input input {
    width: 60px;
    text-align: center;
    border: none;
    border-left: 1px solid var(--color-border);
    border-right: 1px solid var(--color-border);
}

/* ===================================
   Cart & Checkout
   =================================== */

.woocommerce-page {
    min-height: 400px;
    background: #fff;
}

.woocommerce,
.woocommerce-page .woocommerce {
    width: 100%;
    display: block;
    visibility: visible;
    opacity: 1;
}

.woocommerce form,
.woocommerce-cart form {
    width: 100%;
    display: block;
}

.woocommerce-cart .woocommerce,
.woocommerce-cart table.cart,
.woocommerce table.shop_table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 30px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    overflow: hidden;
}

.woocommerce table.shop_table th {
    background: var(--color-primary);
    color: var(--color-secondary);
    padding: 15px;
    text-align: left;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 14px;
}

.woocommerce table.shop_table td {
    padding: 20px 15px;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-secondary);
    color: var(--color-text);
}

.woocommerce table.shop_table td.product-remove a {
    color: var(--color-accent);
    font-weight: 700;
    font-size: 24px;
}

.woocommerce table.shop_table td.product-thumbnail img {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 4px;
}

.woocommerce table.shop_table td.product-name a {
    color: var(--color-primary);
    font-weight: 600;
    font-size: 16px;
}

.woocommerce table.shop_table td.product-name a:hover {
    color: var(--color-accent);
}

.woocommerce table.shop_table td.product-price,
.woocommerce table.shop_table td.product-subtotal {
    color: var(--color-accent);
    font-weight: 700;
    font-size: 18px;
}

.woocommerce .cart-collaterals,
.woocommerce-cart .cart-collaterals {
    width: 100%;
    margin-top: 30px;
}

.woocommerce .cart-collaterals .cart_totals,
.cart_totals {
    float: right;
    width: 100%;
    max-width: 500px;
    background: var(--color-bg-light);
    padding: 30px;
    border-radius: 8px;
    border: 1px solid var(--color-border);
}

.woocommerce .cart-collaterals .cart_totals h2 {
    margin-bottom: 20px;
    font-size: 24px;
    color: var(--color-primary);
}

.woocommerce .cart-collaterals .cart_totals table {
    border: none;
}

.woocommerce .cart-collaterals .cart_totals table th,
.woocommerce .cart-collaterals .cart_totals table td {
    padding: 15px 0;
    border-top: 1px solid var(--color-border);
    background: transparent;
}

.woocommerce .cart-collaterals .cart_totals table tr.order-total th,
.woocommerce .cart-collaterals .cart_totals table tr.order-total td {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-accent);
}

.woocommerce a.button,
.woocommerce button.button,
.woocommerce input.button,
.woocommerce #respond input#submit {
    background: var(--color-primary);
    color: var(--color-secondary);
    padding: 14px 32px;
    border: 2px solid var(--color-primary);
    font-weight: 600;
    text-transform: uppercase;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 16px;
    text-decoration: none;
    display: inline-block;
}

.woocommerce a.button:hover,
.woocommerce button.button:hover,
.woocommerce input.button:hover,
.woocommerce #respond input#submit:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-secondary);
}

.woocommerce a.button.alt,
.woocommerce button.button.alt,
.woocommerce input.button.alt,
.woocommerce #respond input#submit.alt {
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.woocommerce a.button.alt:hover,
.woocommerce button.button.alt:hover,
.woocommerce input.button.alt:hover {
    background: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
}

.woocommerce .quantity input.qty {
    width: 60px;
    padding: 8px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    text-align: center;
}

.woocommerce-cart table.cart td.actions {
    background: var(--color-bg-light);
}

.woocommerce-cart table.cart td.actions .coupon {
    display: inline-block;
    margin-right: 10px;
}

.woocommerce-cart table.cart td.actions .coupon input {
    padding: 10px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    margin-right: 10px;
}

.cart-page,
.checkout-page {
    padding: 60px 20px;
}

.cart-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 30px;
}

.cart-table th {
    background: var(--color-primary);
    color: var(--color-secondary);
    padding: 15px;
    text-align: left;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 14px;
}

.cart-table td {
    padding: 20px 15px;
    border-bottom: 1px solid var(--color-border);
}

.cart-item-image {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 4px;
}

.cart-totals {
    background: var(--color-bg-light);
    padding: 30px;
    border-radius: 8px;
    max-width: 400px;
    margin-left: auto;
}

.cart-totals h3 {
    margin-bottom: 20px;
    font-size: 24px;
}

.totals-row {
    display: flex;
    justify-content: space-between;
    padding: 15px 0;
    border-bottom: 1px solid var(--color-border);
}

.totals-row.total {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-accent);
    border-bottom: none;
}

/* ===================================
   Account & Login Pages
   =================================== */

.woocommerce-account .woocommerce,
.woocommerce-account .woocommerce-MyAccount-content {
    width: 100%;
}

.woocommerce-account .woocommerce-MyAccount-navigation {
    width: 100%;
    max-width: 250px;
    float: left;
    margin-right: 30px;
}

.woocommerce-account .woocommerce-MyAccount-navigation ul {
    list-style: none;
    padding: 0;
    margin: 0;
    background: var(--color-bg-light);
    border-radius: 8px;
    overflow: hidden;
}

.woocommerce-account .woocommerce-MyAccount-navigation li {
    border-bottom: 1px solid var(--color-border);
}

.woocommerce-account .woocommerce-MyAccount-navigation li:last-child {
    border-bottom: none;
}

.woocommerce-account .woocommerce-MyAccount-navigation li a {
    display: block;
    padding: 15px 20px;
    color: var(--color-text);
    font-weight: 500;
    transition: var(--transition);
}

.woocommerce-account .woocommerce-MyAccount-navigation li.is-active a,
.woocommerce-account .woocommerce-MyAccount-navigation li a:hover {
    background: var(--color-accent);
    color: var(--color-secondary);
}

.woocommerce-account .woocommerce-MyAccount-content {
    float: right;
    width: calc(100% - 280px);
}

.woocommerce form.login,
.woocommerce form.register {
    border: 1px solid var(--color-border);
    padding: 30px;
    border-radius: 8px;
    background: var(--color-bg-light);
    margin-bottom: 30px;
}

.woocommerce form .form-row {
    margin-bottom: 20px;
}

.woocommerce form .form-row label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--color-primary);
}

.woocommerce form .form-row input.input-text,
.woocommerce form .form-row textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 16px;
}

.woocommerce form .form-row input:focus,
.woocommerce form .form-row textarea:focus {
    outline: none;
    border-color: var(--color-accent);
}

.woocommerce form.login h2,
.woocommerce form.register h2 {
    margin-top: 0;
    margin-bottom: 20px;
    color: var(--color-primary);
}

.woocommerce-form__label-for-checkbox {
    display: inline-block;
    margin-left: 8px;
}

.woocommerce-account .addresses .title {
    margin-bottom: 20px;
}

.woocommerce-account .addresses .title h3 {
    display: inline-block;
    margin-right: 20px;
}

/* ===================================
   Footer
   =================================== */

.site-footer {
    background: var(--color-primary);
    color: var(--color-secondary);
    padding: 60px 20px 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto 40px;
}

.footer-section h3 {
    margin-bottom: 20px;
    color: var(--color-accent);
}

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

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

.footer-section a {
    color: var(--color-secondary);
    opacity: 0.8;
}

.footer-section a:hover {
    opacity: 1;
    color: var(--color-accent);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.7;
}

.payment-icons {
    display: flex;
    gap: 15px;
    margin-top: 15px;
}

.payment-icon {
    width: 50px;
    height: 32px;
    background: var(--color-secondary);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: 600;
    color: var(--color-primary);
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 768px) {
    .site-logo-img {
        height: 40px;
        max-width: 200px;
    }

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

    .main-navigation {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-primary);
        padding: 20px;
    }

    .main-navigation.active {
        display: block;
    }

    .main-navigation ul {
        flex-direction: column;
        gap: 15px;
    }

    .hero-section h1 {
        font-size: 32px;
    }

    .hero-section p {
        font-size: 16px;
    }

    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 20px;
    }

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

    .product-gallery {
        position: static;
    }

    .cart-table {
        font-size: 14px;
    }

    .cart-table th,
    .cart-table td {
        padding: 10px;
    }

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

@media (max-width: 480px) {
    .products-grid {
        grid-template-columns: 1fr;
    }

    .hero-section {
        padding: 50px 20px;
    }

    .section-title h2 {
        font-size: 28px;
    }
}

/* ===================================
   Utility Classes
   =================================== */

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

.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 30px; }
.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }
.mb-3 { margin-bottom: 30px; }

.loading {
    opacity: 0.6;
    pointer-events: none;
}