/* CSS Variables for theming */
:root {
    /* Colors */
    --color-primary: #000000;
    --color-secondary: #666666;
    --color-light: #f8f8f8;
    --color-border: #e8e8e8;
    --color-background: #ffffff;
    --color-overlay: rgba(0, 0, 0, 0.4);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-secondary: 'Playfair Display', Georgia, serif;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    
    /* Border Radius */
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 8px;
    
    /* Layout */
    --header-height: 72px;
    --container-max: 1280px;
    --sidebar-width: 400px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--color-primary);
    background-color: var(--color-background);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* Typography */
h1, h2, h3, h4 {
    font-weight: 500;
    line-height: 1.2;
}

h1 {
    font-size: 3.5rem;
    font-family: var(--font-secondary);
}

h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-xl);
}

h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
}

h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

p {
    color: var(--color-secondary);
    margin-bottom: var(--spacing-md);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    border: 1px solid var(--color-primary);
    background-color: var(--color-primary);
    color: var(--color-background);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    cursor: pointer;
    transition: all var(--transition-fast);
    border-radius: var(--radius-sm);
    text-align: center;
}

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

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

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

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

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: var(--color-background);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.header.scrolled {
    height: 60px;
    box-shadow: var(--shadow-md);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    font-family: var(--font-secondary);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
    letter-spacing: -0.5px;
}

/* Navigation */
.nav__list {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
}

.nav__link {
    text-decoration: none;
    color: var(--color-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: color var(--transition-fast);
}

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--color-primary);
}

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

.search-toggle,
.cart-toggle {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--color-primary);
    position: relative;
}

.cart-count {
    position: absolute;
    top: -6px;
    right: -6px;
    background-color: var(--color-primary);
    color: var(--color-background);
    font-size: 0.75rem;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Search Panel */
.search-panel {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-background);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-100%);
    transition: transform var(--transition-base);
    z-index: 900;
    opacity: 0;
    pointer-events: none;
}

.search-panel.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
}

.search-input {
    width: 100%;
    padding: var(--spacing-md);
    border: none;
    font-size: 1.5rem;
    font-family: var(--font-secondary);
    border-bottom: 2px solid transparent;
    outline: none;
}

.search-input:focus {
    border-bottom-color: var(--color-primary);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-background);
    z-index: 1100;
    display: none;
    padding: var(--spacing-xxl);
}

.mobile-menu.active {
    display: flex;
    flex-direction: column;
}

.mobile-menu__close {
    align-self: flex-end;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xxl);
}

.mobile-nav ul {
    list-style: none;
}

.mobile-nav li {
    margin-bottom: var(--spacing-xl);
}

.mobile-nav a {
    text-decoration: none;
    color: var(--color-primary);
    font-size: 2rem;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.mobile-nav a:hover {
    color: var(--color-secondary);
}

/* Hero Section */
.hero {
    position: relative;
    height: 90vh;
    min-height: 600px;
    margin-top: var(--header-height);
    overflow: hidden;
}

.hero__image {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

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

.hero__content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: var(--color-background);
    z-index: 2;
    max-width: 800px;
    padding: var(--spacing-xl);
}

.hero__title {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    color: var(--color-background);
}

.hero__subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xxl);
    color: var(--color-background);
    opacity: 0.9;
}

/* Filter Bar */
.filter-bar {
    padding: var(--spacing-lg) 0;
    display: flex;
    justify-content: flex-end;
}

.sort-select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-primary);
    cursor: pointer;
}

.hero__image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-overlay);
}

/* Products Grid */
.section {
    padding: var(--spacing-xxl) 0;
}

.section__title {
    text-align: center;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xxl);
}

.load-more-container {
    margin-top: var(--spacing-xl);
    text-align: center;
    display: none; /* Hidden by default, shown via JS if needed */
}

.product-card {
    text-decoration: none;
    color: inherit;
    transition: transform var(--transition-base);
}

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

.product-card__image {
    position: relative;
    overflow: hidden;
    padding-top: 56.25%; /* 16:9 aspect ratio */
    margin-bottom: var(--spacing-md);
    cursor: pointer;
}

.product-card__image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-base);
}

.product-card:hover .product-card__image img {
    transform: scale(1.03);
}

.product-card__image model-viewer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #f5f5f5;
}

/* Add an overlay icon on hover to indicate clickability */
.product-card__image::after {
    content: '\f06e'; /* FontAwesome eye icon */
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 2rem;
    opacity: 0;
    transition: opacity var(--transition-base);
    z-index: 2;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
    pointer-events: none;
}

.product-card:hover .product-card__image::after {
    opacity: 1;
}

.product-card__badge {
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
    background-color: var(--color-background);
    color: var(--color-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.product-card__title {
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

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

.bid-label {
    display: block;
    font-size: 0.75rem;
    color: var(--color-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.bid-amount {
    display: block;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.bid-input {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-primary);
    margin-bottom: var(--spacing-sm);
}

.product-card__actions {
    margin-top: var(--spacing-sm);
}

.add-to-cart {
    width: 100%;
    background-color: var(--color-primary);
    color: var(--color-background);
    border: 1px solid var(--color-primary);
}

.add-to-cart:hover {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

/* Cart Sidebar */
.cart-sidebar {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: var(--sidebar-width);
    max-width: 100%;
    background-color: var(--color-background);
    z-index: 1200;
    transform: translateX(100%);
    transition: transform var(--transition-base);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
}

.cart-sidebar.active {
    transform: translateX(0);
}

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

.cart-sidebar__close {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--color-secondary);
}

.cart-sidebar__items {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
}

.cart-empty {
    text-align: center;
    padding: var(--spacing-xxl) 0;
    color: var(--color-secondary);
}

.cart-empty i {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.3;
}

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

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

.cart-item__image {
    width: 80px;
    height: 106px;
    flex-shrink: 0;
}

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

.cart-item__details {
    flex: 1;
}

.cart-item__title {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.cart-item__price {
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

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

.quantity-control {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.quantity-btn {
    width: 24px;
    height: 24px;
    border: 1px solid var(--color-border);
    background: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.quantity {
    min-width: 30px;
    text-align: center;
}

.remove-item {
    background: none;
    border: none;
    color: var(--color-secondary);
    cursor: pointer;
    font-size: 0.875rem;
    margin-left: auto;
}

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

.cart-sidebar__footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.cart-total {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
    font-weight: 600;
    font-size: 1.125rem;
}

.cart-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1100;
    display: none;
}

.cart-overlay.active {
    display: block;
}

/* Checkout Modal */
.checkout-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1300;
    padding: var(--spacing-lg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.checkout-modal.active {
    opacity: 1;
    visibility: visible;
}

.checkout-modal__content {
    background-color: var(--color-background);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    position: relative;
    box-shadow: var(--shadow-lg);
}

.checkout-modal__close {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--color-secondary);
}

.checkout-modal__title {
    margin-bottom: var(--spacing-xl);
}

.checkout-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1200;
    display: none;
}

.checkout-overlay.active {
    display: block;
}

/* Quick View Modal */
.quick-view-modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1400;
    width: 90%;
    max-width: 900px;
    background-color: var(--color-background);
    border-radius: var(--radius-md);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg);
}

.quick-view-modal.active {
    opacity: 1;
    visibility: visible;
}

.quick-view-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1350;
    display: none;
}

.quick-view-overlay.active {
    display: block;
}

.quick-view-content {
    position: relative;
    padding: var(--spacing-xl);
}

.quick-view-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-secondary);
    z-index: 10;
}

.quick-view-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.quick-view-image img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    font-size: 0.875rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

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

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

.checkout-summary {
    background-color: var(--color-light);
    padding: var(--spacing-lg);
    border-radius: var(--radius-sm);
    margin: var(--spacing-xl) 0;
}

.checkout-summary-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.checkout-summary-total {
    display: flex;
    justify-content: space-between;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
    font-weight: 600;
    font-size: 1.125rem;
}

/* Footer */
.footer {
    background-color: var(--color-light);
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.footer__content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 2fr;
    gap: var(--spacing-xxl);
    margin-bottom: var(--spacing-xxl);
}

.footer__links h4 {
    margin-bottom: var(--spacing-lg);
}

.footer__links ul {
    list-style: none;
}

.footer__links li {
    margin-bottom: var(--spacing-sm);
}

.footer__links a {
    text-decoration: none;
    color: var(--color-secondary);
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

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

.footer__newsletter p {
    margin-bottom: var(--spacing-lg);
}

.newsletter-form {
    display: flex;
    gap: var(--spacing-sm);
}

.newsletter-form input {
    flex: 1;
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-primary);
}

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    font-size: 0.875rem;
    color: var(--color-secondary);
}

.footer__payment {
    display: flex;
    gap: var(--spacing-lg);
    font-size: 1.5rem;
}

/* Responsive Styles */
@media (max-width: 1024px) {
    h1 {
        font-size: 3rem;
    }
    
    .hero__title {
        font-size: 3rem;
    }
    
    .footer__content {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xl);
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 64px;
    }
    
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .nav {
        display: none;
    }
    
    .hero {
        height: 70vh;
        min-height: 500px;
    }
    
    .hero__content {
        padding: var(--spacing-lg);
    }
    
    .hero__title {
        font-size: 2.5rem;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .quick-view-grid {
        grid-template-columns: 1fr;
    }
    
    .footer__content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .footer__bottom {
        flex-direction: column;
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    .cart-sidebar {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .hero {
        height: 60vh;
        min-height: 400px;
    }
    
    .hero__title {
        font-size: 2rem;
    }
    
    .section {
        padding: var(--spacing-xl) 0;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
}