/* ==========================================================================
   UAE PEPTIDE LAB - Professional E-Commerce Stylesheet
   ========================================================================== */

/* ==========================================================================
   CSS VARIABLES & ROOT STYLES
   ========================================================================== */

:root {
    /* Primary Colors */
    --color-primary: #337ab7;
    --color-primary-dark: #286090;
    --color-secondary: #5cb85c;
    --color-secondary-dark: #4cae4c;
    
    /* Accent Colors */
    --color-accent-blue: #3498db;
    --color-accent-gold: #f39c12;
    --color-accent-orange: #e67e22;
    
    /* Neutral Colors */
    --color-white: #ffffff;
    --color-light-gray: #f5f5f5;
    --color-border: #e0e0e0;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-text-muted: #999999;
    
    /* Background Colors */
    --color-bg-light: #fafafa;
    --color-bg-dark: #212121;
    --color-bg-dark-alt: #333333;
    
    /* Status Colors */
    --color-success: #5cb85c;
    --color-warning: #f0ad4e;
    --color-danger: #d9534f;
    --color-info: #5bc0de;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 3px 8px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 6px 20px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 10px 30px rgba(0, 0, 0, 0.20);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 400ms ease-in-out;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;
}

/* ==========================================================================
   RESET & BASE STYLES
   ========================================================================== */

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg-light);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
}

input, textarea, select {
    font-family: inherit;
    font-size: 1rem;
}

/* ==========================================================================
   TYPOGRAPHY
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

h1 {
    font-size: 3rem;
    font-weight: 700;
}

h2 {
    font-size: 2.25rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

h5 {
    font-size: 1.125rem;
}

h6 {
    font-size: 1rem;
}

p {
    margin-bottom: var(--spacing-sm);
}

.text-muted {
    color: var(--color-text-muted);
}

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

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

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

/* ==========================================================================
   LAYOUT & CONTAINER
   ========================================================================== */

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xxl) 0;
}

.section-sm {
    padding: var(--spacing-xl) 0;
}

.section-lg {
    padding: 5rem 0;
}

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */

.header {
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: box-shadow var(--transition-normal);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

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

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

.logo i {
    font-size: 1.75rem;
}

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

.nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-item {
    position: relative;
}

.nav-link {
    color: var(--color-text);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    display: block;
    position: relative;
    transition: color var(--transition-normal);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--transition-normal), left var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
    left: 0;
}

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

/* Dropdown Menu */
.dropdown {
    position: relative;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--color-white);
    min-width: 250px;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-normal);
}

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

.dropdown-item {
    padding: var(--spacing-xs) var(--spacing-md);
    color: var(--color-text);
    display: block;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.dropdown-item:hover {
    background-color: var(--color-light-gray);
    color: var(--color-primary);
}

/* Cart Icon */
.cart-icon {
    position: relative;
    font-size: 1.5rem;
    color: var(--color-text);
    transition: color var(--transition-normal);
}

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

.cart-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background-color: var(--color-danger);
    color: var(--color-white);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 20px;
    text-align: center;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-text);
    cursor: pointer;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */

.hero {
    background: linear-gradient(135deg, #2c5aa0 0%, #337ab7 50%, #4a8bc2 100%);
    color: var(--color-white);
    padding: var(--spacing-xxl) 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(255,255,255,0.03) 10px, rgba(255,255,255,0.03) 20px);
    pointer-events: none;
}

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

.hero h1 {
    color: var(--color-white);
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width var(--transition-slow), height var(--transition-slow);
}

.btn:active::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    color: var(--color-white);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-secondary-dark) 100%);
    color: var(--color-white);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    color: var(--color-white);
}

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

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

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

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

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

.btn-block {
    display: block;
    width: 100%;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* ==========================================================================
   CARDS
   ========================================================================== */

.card {
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all var(--transition-normal);
    position: relative;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.card:hover::before {
    transform: scaleX(1);
}

.card-image {
    width: 100%;
    height: 250px;
    background: linear-gradient(135deg, #e0e0e0 0%, #c0c0c0 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

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

.card-image-placeholder {
    color: var(--color-text-muted);
    font-size: 4rem;
}

.card-body {
    padding: var(--spacing-md);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.card-subtitle {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.card-text {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

.card-footer {
    padding: var(--spacing-md);
    background-color: var(--color-light-gray);
    border-top: 1px solid var(--color-border);
}

/* ==========================================================================
   BADGES
   ========================================================================== */

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    border-radius: 20px;
    letter-spacing: 0.5px;
}

.badge-success {
    background-color: var(--color-success);
    color: var(--color-white);
    animation: pulse 2s infinite;
}

.badge-info {
    background-color: var(--color-info);
    color: var(--color-white);
}

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

.badge-gold {
    background: linear-gradient(135deg, #f39c12 0%, #e67e22 100%);
    color: var(--color-white);
}

.badge-category {
    background-color: var(--color-light-gray);
    color: var(--color-text);
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

/* ==========================================================================
   PRODUCT CARDS
   ========================================================================== */

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.product-card {
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all var(--transition-normal);
    position: relative;
    display: flex;
    flex-direction: column;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.product-card:hover::before {
    transform: scaleX(1);
}

.product-image {
    width: 100%;
    height: 250px;
    background: linear-gradient(135deg, #e8e8e8 0%, #d0d0d0 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

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

.product-badges {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    align-items: flex-end;
}

.product-body {
    padding: var(--spacing-md);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-category {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-xs);
}

.product-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.product-technical-name {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
    font-style: italic;
}

.product-spec {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

.product-price {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.product-research-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

.product-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: auto;
}

/* ==========================================================================
   TRUST SIGNALS
   ========================================================================== */

.trust-signals {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.trust-card {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: transform var(--transition-normal);
}

.trust-card:hover {
    transform: translateY(-4px);
}

.trust-icon {
    font-size: 3rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.trust-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.trust-card p {
    color: var(--color-text-light);
    margin-bottom: 0;
}

/* ==========================================================================
   CATEGORIES
   ========================================================================== */

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.category-card {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: 2px solid transparent;
}

.category-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.category-icon {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.category-card h3 {
    font-size: 1rem;
    margin-bottom: 0;
    color: var(--color-text);
}

/* ==========================================================================
   DISCLAIMER / WARNING BOX
   ========================================================================== */

.disclaimer-box {
    background: linear-gradient(135deg, #fff3cd 0%, #ffeaa7 100%);
    border-left: 4px solid var(--color-warning);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin: var(--spacing-xl) 0;
}

.disclaimer-box-danger {
    background: linear-gradient(135deg, #f8d7da 0%, #f5c6cb 100%);
    border-left-color: var(--color-danger);
}

.disclaimer-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.disclaimer-title i {
    font-size: 1.5rem;
    color: var(--color-warning);
}

.disclaimer-text {
    color: var(--color-text);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

.disclaimer-text:last-child {
    margin-bottom: 0;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */

.footer {
    background: linear-gradient(135deg, #212121 0%, #333333 100%);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
    border-top: 3px solid var(--color-primary);
}

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

.footer-section h4 {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
}

.footer-section p {
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.footer-link {
    color: rgba(255, 255, 255, 0.8);
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.footer-link:hover {
    color: var(--color-white);
    transform: translateX(4px);
}

.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.footer-contact-item i {
    color: var(--color-primary);
    margin-top: 4px;
}

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

.footer-disclaimer {
    background-color: rgba(0, 0, 0, 0.2);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
}

.footer-disclaimer strong {
    color: var(--color-warning);
}

.footer-copyright {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
}

/* ==========================================================================
   FORMS
   ========================================================================== */

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.form-label-required::after {
    content: ' *';
    color: var(--color-danger);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    background-color: var(--color-white);
    transition: all var(--transition-normal);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(51, 122, 183, 0.1);
}

.form-control.error {
    border-color: var(--color-danger);
}

.form-error {
    color: var(--color-danger);
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23333333'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1.5rem;
    padding-right: 2.5rem;
}

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

.form-checkbox {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.form-checkbox input[type="checkbox"] {
    margin-top: 4px;
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.form-checkbox label {
    cursor: pointer;
    user-select: none;
}

/* ==========================================================================
   FILTERS & SEARCH
   ========================================================================== */

.filters-section {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-xl);
}

.filters-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-md);
    align-items: end;
}

.search-box {
    position: relative;
}

.search-box input {
    padding-left: 2.5rem;
}

.search-box i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
}

/* ==========================================================================
   BREADCRUMB
   ========================================================================== */

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) 0;
    font-size: 0.875rem;
}

.breadcrumb-item {
    color: var(--color-text-light);
}

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

.breadcrumb-separator {
    color: var(--color-text-muted);
}

.breadcrumb-item:last-child {
    color: var(--color-text);
    font-weight: 600;
}

/* ==========================================================================
   PRODUCT DETAIL PAGE
   ========================================================================== */

.product-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    margin-bottom: var(--spacing-xxl);
}

.product-detail-image {
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.product-main-image {
    width: 100%;
    height: 500px;
    background: linear-gradient(135deg, #e8e8e8 0%, #d0d0d0 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.product-detail-info {
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.product-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

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

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

.product-price-section {
    background-color: var(--color-light-gray);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.price-main {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
}

.price-kit {
    color: var(--color-text-light);
    margin-top: var(--spacing-xs);
}

.price-kit-amount {
    color: var(--color-secondary);
    font-weight: 600;
}

.product-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-light);
    font-size: 0.875rem;
}

.feature-item i {
    color: var(--color-success);
}

.quantity-selector {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

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

.quantity-btn {
    background-color: var(--color-light-gray);
    border: none;
    padding: 0.5rem 1rem;
    font-size: 1.25rem;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

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

.quantity-input {
    border: none;
    text-align: center;
    width: 60px;
    font-weight: 600;
}

.product-actions-row {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

/* Tabs */
.tabs {
    margin-top: var(--spacing-xxl);
}

.tab-nav {
    display: flex;
    gap: var(--spacing-sm);
    border-bottom: 2px solid var(--color-border);
    margin-bottom: var(--spacing-lg);
}

.tab-button {
    background: none;
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-light);
    cursor: pointer;
    position: relative;
    transition: color var(--transition-normal);
}

.tab-button::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--color-primary);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.tab-button.active {
    color: var(--color-primary);
}

.tab-button.active::after {
    transform: scaleX(1);
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.specs-table {
    width: 100%;
}

.specs-table tr {
    border-bottom: 1px solid var(--color-border);
}

.specs-table td {
    padding: var(--spacing-sm);
}

.specs-table td:first-child {
    font-weight: 600;
    width: 200px;
}

/* ==========================================================================
   CART PAGE
   ========================================================================== */

.cart-layout {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
}

.cart-items {
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.cart-item {
    display: grid;
    grid-template-columns: 100px 1fr auto;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

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

.cart-item-image {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, #e8e8e8 0%, #d0d0d0 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.cart-item-title {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.cart-item-technical {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
}

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

.cart-item-actions {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--spacing-sm);
}

.cart-item-remove {
    background: none;
    border: none;
    color: var(--color-danger);
    cursor: pointer;
    font-size: 1.25rem;
    transition: color var(--transition-fast);
}

.cart-item-remove:hover {
    color: #c9302c;
}

.cart-summary {
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 100px;
}

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

.summary-row:last-of-type {
    border-bottom: 2px solid var(--color-border);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    padding: var(--spacing-md) 0;
    margin-bottom: var(--spacing-md);
}

.free-shipping-notice {
    background-color: var(--color-light-gray);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    text-align: center;
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
}

.empty-cart {
    text-align: center;
    padding: var(--spacing-xxl);
}

.empty-cart i {
    font-size: 5rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

/* ==========================================================================
   CHECKOUT PAGE
   ========================================================================== */

.checkout-progress {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.progress-step {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-muted);
}

.progress-step.active {
    color: var(--color-primary);
    font-weight: 600;
}

.progress-step.completed {
    color: var(--color-success);
}

.step-number {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--color-light-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.progress-step.active .step-number {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.progress-step.completed .step-number {
    background-color: var(--color-success);
    color: var(--color-white);
}

.checkout-layout {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
}

.checkout-form {
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.form-section {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 2px solid var(--color-border);
}

.form-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.form-section h3 {
    margin-bottom: var(--spacing-md);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.payment-option {
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
}

.payment-option:hover {
    border-color: var(--color-primary);
}

.payment-option.selected {
    border-color: var(--color-primary);
    background-color: rgba(51, 122, 183, 0.05);
}

.payment-option input[type="radio"] {
    position: absolute;
    opacity: 0;
}

.payment-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.payment-header i {
    font-size: 1.5rem;
    color: var(--color-primary);
}

.payment-title {
    font-weight: 600;
    flex: 1;
}

.payment-recommended {
    background-color: var(--color-success);
    color: var(--color-white);
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 4px;
}

.payment-description {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.order-summary-sidebar {
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 100px;
}

.summary-product {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
}

.summary-product-image {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #e8e8e8 0%, #d0d0d0 100%);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.summary-product-details {
    flex: 1;
    min-width: 0;
}

.summary-product-name {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.summary-product-qty {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.summary-product-price {
    font-weight: 600;
    color: var(--color-primary);
}

.bank-details {
    background-color: var(--color-light-gray);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.bank-details h4 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.bank-detail-row {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-xs) 0;
    font-family: 'Courier New', monospace;
}

.bank-detail-label {
    font-weight: 600;
}

/* ==========================================================================
   CONTACT PAGE
   ========================================================================== */

.contact-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.contact-card {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
}

.contact-card-icon {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.contact-card h3 {
    margin-bottom: var(--spacing-sm);
}

.contact-form-section {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-xl);
}

.faqs {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.faq-item {
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-border);
}

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

.faq-question {
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.faq-answer {
    color: var(--color-text-light);
}

/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */

@media (max-width: 992px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .product-detail {
        grid-template-columns: 1fr;
    }
    
    .cart-layout,
    .checkout-layout {
        grid-template-columns: 1fr;
    }
    
    .filters-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .nav {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--color-white);
        box-shadow: var(--shadow-lg);
        padding: var(--spacing-md);
        z-index: 999;
    }
    
    .nav.active {
        display: block;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 0;
    }
    
    .nav-link {
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--color-border);
    }
    
    .dropdown-menu {
        position: static;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        transform: none;
        padding-left: var(--spacing-md);
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .trust-signals {
        grid-template-columns: 1fr;
    }
    
    .categories-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .cart-item {
        grid-template-columns: 80px 1fr;
    }
    
    .cart-item-actions {
        grid-column: 2;
        flex-direction: row;
        justify-content: space-between;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .checkout-progress {
        flex-direction: column;
    }
    
    .product-features {
        grid-template-columns: 1fr;
    }
    
    .product-actions-row {
        flex-direction: column;
    }
}

/* ==========================================================================
   UTILITY CLASSES
   ========================================================================== */

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.pt-1 { padding-top: var(--spacing-xs); }
.pt-2 { padding-top: var(--spacing-sm); }
.pt-3 { padding-top: var(--spacing-md); }
.pt-4 { padding-top: var(--spacing-lg); }
.pt-5 { padding-top: var(--spacing-xl); }

.pb-1 { padding-bottom: var(--spacing-xs); }
.pb-2 { padding-bottom: var(--spacing-sm); }
.pb-3 { padding-bottom: var(--spacing-md); }
.pb-4 { padding-bottom: var(--spacing-lg); }
.pb-5 { padding-bottom: var(--spacing-xl); }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.flex-column { flex-direction: column; }
.align-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--spacing-xs); }
.gap-2 { gap: var(--spacing-sm); }
.gap-3 { gap: var(--spacing-md); }

/* ==========================================================================
   PRINT STYLES
   ========================================================================== */

@media print {
    .header,
    .footer,
    .hero,
    .btn,
    .mobile-menu-toggle {
        display: none !important;
    }
    
    body {
        background-color: white;
        color: black;
    }
    
    .section {
        page-break-inside: avoid;
    }
}