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

:root {
    --color-primary: #000000;
    --color-secondary: #757575;
    --color-accent: #ff6b00;
    --color-bg: #ffffff;
    --color-bg-alt: #f5f5f5;
    --color-border: #e5e5e5;
    --color-text: #111111;
    --color-text-secondary: #757575;
    --color-success: #22c55e;
    --color-sale: #dc2626;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

/* Container */
.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Promo Banner */
.promo-banner {
    background-color: var(--color-bg-alt);
    text-align: center;
    padding: var(--spacing-sm) 0;
    font-size: 12px;
    font-weight: 500;
}

.promo-banner a {
    text-decoration: underline;
}

/* Header */
.header {
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 700;
    font-size: 18px;
}

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

.brand-name {
    letter-spacing: 2px;
}

.main-nav {
    display: flex;
    gap: var(--spacing-lg);
    flex: 1;
    justify-content: center;
}

.main-nav a {
    font-weight: 500;
    transition: color 0.2s;
    white-space: nowrap;
}

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

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

.search-input {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    width: 200px;
    font-size: 14px;
}

.icon-btn {
    padding: var(--spacing-sm);
}

.icon-btn:hover {
    opacity: 0.7;
}

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

/* Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

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

/* Content Wrapper */
.content-wrapper {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: var(--spacing-2xl);
}

/* Sidebar */
.sidebar {
    position: sticky;
    top: 120px;
    align-self: start;
}

.filter-section {
    margin-bottom: var(--spacing-xl);
}

.filter-section h3 {
    font-size: 16px;
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.filter-list {
    list-style: none;
}

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

.filter-list a {
    display: block;
    padding: var(--spacing-xs) 0;
    transition: color 0.2s;
}

.filter-list a:hover,
.filter-list a.active {
    color: var(--color-primary);
    font-weight: 500;
}

.filter-list label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    padding: var(--spacing-xs) 0;
}

.filter-list input[type="checkbox"] {
    width: 18px;
    height: 18px;
}

.size-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
}

.size-btn {
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 14px;
    transition: all 0.2s;
}

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

/* Product Section */
.product-section {
    flex: 1;
}

.product-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.product-header h1 {
    font-size: 28px;
    font-weight: 600;
}

.count {
    color: var(--color-text-secondary);
    font-size: 20px;
}

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

.filter-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    font-size: 14px;
}

.sort-select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    font-size: 14px;
    cursor: pointer;
}

/* Product Grid */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.product-card {
    cursor: pointer;
    transition: transform 0.2s;
}

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

.product-image-container {
    position: relative;
    background-color: var(--color-bg-alt);
    border-radius: 4px;
    overflow: hidden;
    aspect-ratio: 1;
    margin-bottom: var(--spacing-md);
}

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

.product-badge {
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: white;
    font-size: 12px;
    font-weight: 600;
    border-radius: 4px;
}

.product-badge.best-seller {
    background-color: var(--color-primary);
    color: white;
}

.product-badge.new {
    background-color: var(--color-success);
    color: white;
}

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

.product-badge.coming-soon {
    background-color: var(--color-text-secondary);
    color: white;
}

.product-details {
    padding: 0 var(--spacing-xs);
}

.product-name {
    font-weight: 600;
    font-size: 16px;
    margin-bottom: var(--spacing-xs);
}

.product-category {
    color: var(--color-text-secondary);
    font-size: 14px;
    margin-bottom: var(--spacing-sm);
}

.color-count {
    color: var(--color-text-secondary);
    font-size: 14px;
    margin-bottom: var(--spacing-sm);
}

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

.price {
    font-weight: 600;
    font-size: 16px;
}

.original-price {
    color: var(--color-text-secondary);
    text-decoration: line-through;
    font-size: 14px;
}

.color-swatches-card {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.color-swatch {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 2px solid var(--color-border);
    cursor: pointer;
    transition: all 0.2s;
}

.color-swatch:hover {
    transform: scale(1.1);
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-2xl);
}

.page-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 14px;
    transition: all 0.2s;
    min-width: 40px;
}

.page-btn:hover:not(:disabled) {
    background-color: var(--color-bg-alt);
}

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

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

/* Product Detail Page */
.product-detail-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-xl);
}

.product-images {
    position: sticky;
    top: 120px;
    align-self: start;
}

.main-image-container {
    position: relative;
    background-color: var(--color-bg-alt);
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: var(--spacing-md);
    aspect-ratio: 1;
}

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

.favorite-btn {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    background-color: white;
    border-radius: 50%;
    padding: var(--spacing-md);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: all 0.2s;
}

.favorite-btn:hover {
    transform: scale(1.1);
}

.thumbnail-images {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: var(--spacing-sm);
}

.thumbnail {
    aspect-ratio: 1;
    border-radius: 4px;
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: border-color 0.2s;
}

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

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

/* Product Info */
.product-info {
    padding: var(--spacing-lg) 0;
}

.product-info .product-badge {
    position: static;
    display: inline-block;
    margin-bottom: var(--spacing-md);
}

.product-title {
    font-size: 36px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.product-info .product-category {
    font-size: 16px;
    margin-bottom: var(--spacing-lg);
}

.product-price {
    margin-bottom: var(--spacing-2xl);
}

.current-price {
    font-size: 28px;
    font-weight: 600;
}

.product-price .original-price {
    font-size: 20px;
    margin-left: var(--spacing-md);
}

/* Color Selection */
.color-selection {
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid var(--color-border);
}

.color-selection h3 {
    font-size: 18px;
    margin-bottom: var(--spacing-sm);
}

.selected-color-name {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    font-size: 14px;
}

.color-swatches {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.color-swatch-large {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 2px solid var(--color-border);
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}

.color-swatch-large:hover {
    transform: scale(1.05);
}

.color-swatch-large.active {
    border-color: var(--color-primary);
    border-width: 3px;
}

.color-swatch-large.active::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 16px;
    height: 16px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='3'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
    background-size: contain;
}

/* Size Selection */
.size-selection {
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid var(--color-border);
}

.size-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.size-header h3 {
    font-size: 18px;
}

.size-guide-link {
    color: var(--color-text-secondary);
    text-decoration: underline;
    font-size: 14px;
}

.size-grid-detail {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: var(--spacing-sm);
}

.size-btn-detail {
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 16px;
    transition: all 0.2s;
    background-color: white;
}

.size-btn-detail:hover {
    border-color: var(--color-primary);
}

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

/* Actions */
.actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.btn-primary,
.btn-secondary {
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: 24px;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background-color: #333;
}

.btn-secondary {
    border: 1px solid var(--color-border);
    background-color: white;
}

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

.add-to-cart:disabled {
    background-color: var(--color-border);
    cursor: not-allowed;
}

/* Product Description */
.product-description {
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid var(--color-border);
}

.product-description h3,
.product-features h4 {
    font-size: 18px;
    margin-bottom: var(--spacing-md);
}

.product-description p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.product-features ul {
    list-style-position: inside;
    color: var(--color-text-secondary);
}

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

/* Delivery Info */
.delivery-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.info-section h4 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 16px;
    margin-bottom: var(--spacing-sm);
}

.info-section p {
    color: var(--color-text-secondary);
    font-size: 14px;
    margin-bottom: var(--spacing-xs);
}

.info-section a {
    color: var(--color-text-secondary);
    text-decoration: underline;
    font-size: 14px;
}

/* Footer */
.footer {
    background-color: var(--color-primary);
    color: white;
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-column h4 {
    margin-bottom: var(--spacing-md);
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

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

.footer-column a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    transition: color 0.2s;
}

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

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-links a {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    transition: background-color 0.2s;
}

.social-links a:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.footer-bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.7);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .content-wrapper {
        grid-template-columns: 200px 1fr;
    }

    .product-grid {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    }
}

@media (max-width: 768px) {
    .content-wrapper {
        grid-template-columns: 1fr;
    }

    .sidebar {
        display: none;
    }

    .main-nav {
        display: none;
    }

    .product-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }

    .product-detail-container {
        grid-template-columns: 1fr;
    }

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

    .product-title {
        font-size: 28px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .product-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }

    .sort-controls {
        width: 100%;
        justify-content: space-between;
    }
}