/* ==========================================================================
   Product Detail Page Styles - Enhanced & Refined
   ========================================================================== */

/* ==========================================================================
   Base Layout & Structure
   ========================================================================== */

.product-detail-page {
    min-height: 100vh;
    background: var(--bg-primary);
}

.product-detail-main {
    padding: var(--space-6) 0 var(--space-8);
}

/* ==========================================================================
   Breadcrumb Navigation - Enhanced
   ========================================================================== */

.breadcrumb-nav {
    margin-bottom: var(--space-6);
}

.breadcrumb {
    background: transparent;
    padding: 0;
    margin: 0;
    font-size: var(--font-size-sm);
}

.breadcrumb-item a {
    color: var(--text-secondary);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    transition: var(--transition-all);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-md);
}

.breadcrumb-item a:hover {
    color: var(--primary-color);
    background: var(--primary-50);
}

.breadcrumb-item.active {
    color: var(--text-primary);
    font-weight: 500;
}

/* ==========================================================================
   Product Overview Card - Redesigned
   ========================================================================== */

.product-overview-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-100);
    margin-bottom: var(--space-8);
    position: relative;
    overflow: hidden;
    box-sizing: border-box;
    width: 100%;
}

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

/* ==========================================================================
   Product Image Section - Enhanced
   ========================================================================== */

.product-image-section {
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-image-wrapper {
    position: relative;
    max-width: 400px;
    width: 100%;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    background: var(--gray-50);
    transition: var(--transition-all);
}

.product-image-wrapper:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-2xl);
}

.product-image-wrapper:hover .image-overlay {
    opacity: 1;
}

.product-main-image {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition-all);
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-all);
}

.image-zoom-btn {
    background: var(--white);
    border: none;
    border-radius: var(--radius-full);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    font-size: var(--font-size-xl);
    cursor: pointer;
    transition: var(--transition-all);
    box-shadow: var(--shadow-lg);
}

.image-zoom-btn:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: scale(1.1);
}

.product-image-placeholder {
    aspect-ratio: 3/4;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    background: var(--gray-100);
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius-xl);
}

.product-image-placeholder i {
    font-size: 3rem;
    margin-bottom: var(--space-2);
}

/* ==========================================================================
   Product Info Section - Structured
   ========================================================================== */

.product-info-section {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: var(--space-6);
}

.product-header-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

/* Main product title in detail page */
.product-info-section .product-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.2;
}

/* ==========================================================================
   Product Meta Information - Enhanced
   ========================================================================== */

.product-meta {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.meta-badges {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.meta-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: var(--transition-all);
}

.meta-badge-type {
    background: var(--bg-gradient);
    color: var(--white);
    border: 1px solid var(--white);
}

.meta-badge-age {
    background: var(--bg-gradient);
    color: var(--white);
    border: 1px solid var(--white);
}

.meta-badge-discount {
    background: var(--bg-gradient);
    color: var(--white);
    border: 1px solid var(--white);
}

.meta-badge-file {
    background: var(--bg-gradient);
    color: var(--white);
    border: 1px solid var(--white);
}

/* File extension specific colors for meta badges */
.meta-badge-file-pdf {
    background: #dc3545; /* Red for PDF */
}

.meta-badge-file-pptx {
    background: #fd7e14; /* Orange for PowerPoint */
}

.meta-badge-file-docx {
    background: #0d6efd; /* Blue for Word */
}

.meta-badge-file-xlsx {
    background: #198754; /* Green for Excel */
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

/* ==========================================================================
   Product Taxonomy - Categories & Subjects
   ========================================================================== */

.product-taxonomy {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.taxonomy-group {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.taxonomy-label {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-secondary);
}

.taxonomy-tags {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.taxonomy-tag {
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: 500;
    transition: var(--transition-all);
    cursor: default;
}

.taxonomy-tag-category {
    background: var(--blue-100);
    color: var(--blue-800);
    border: 1px solid var(--blue-200);
}

.taxonomy-tag-subject {
    background: var(--green-100);
    color: var(--green-800);
    border: 1px solid var(--green-200);
}

.taxonomy-tag:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

/* ==========================================================================
   Purchase Section - Enhanced
   ========================================================================== */

.purchase-section {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    border: 1px solid var(--gray-200);
}

.price-container {
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--gray-200);
}

.price-display {
    display: flex;
    align-items: baseline;
    gap: var(--space-3);
    flex-wrap: wrap;
}

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

.original-price {
    font-size: var(--font-size-lg);
    color: var(--text-muted);
    text-decoration: line-through;
}

.savings-amount {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--success-600);
    background: var(--success-100);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-md);
    border: 1px solid var(--success-200);
}

.action-buttons {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: var(--font-size-sm);
    border: none;
    cursor: pointer;
    transition: var(--transition-all);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--bg-gradient);
    color: white;
    flex: 1;
    min-width: 160px;
}

.btn-primary:hover:not(:disabled) {
    opacity: 0.9;
}

.btn-secondary {
    background: var(--gray-100);
    color: var(--text-secondary);
    border: none;
    flex: 1;
    min-width: 160px;
}

.btn-secondary:disabled {
    opacity: 0.2;
    
}

/* ==========================================================================
   Product Details Grid - Improved Layout
   ========================================================================== */

.product-details-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.detail-section {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-100);
}

.section-header {
    background: linear-gradient(135deg, var(--gray-50), var(--gray-100));
    padding: var(--space-4) var(--space-6);
    border-bottom: 1px solid var(--gray-200);
}

.section-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.item-count {
    font-size: var(--font-size-sm);
    font-weight: 400;
    color: var(--text-secondary);
}

.section-content {
    padding: var(--space-6);
}

.product-description {
    color: var(--text-secondary);
    line-height: var(--line-height-relaxed);
    font-size: var(--font-size-base);
}

/* ==========================================================================
   Image Gallery Horizontal Scroll - Enhanced
   ========================================================================== */

.image-gallery-scroll {
    display: flex;
    gap: var(--space-4);
    overflow-x: auto;
    overflow-y: hidden;
    scroll-behavior: smooth;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE and Edge */
    padding-bottom: var(--space-2);
    -webkit-overflow-scrolling: touch; /* Smooth scrolling on iOS */
    cursor: grab; /* Indicates draggable */
}

.image-gallery-scroll.dragging {
    cursor: grabbing; /* Shows grabbing state during drag */
    scroll-behavior: auto; /* Disable smooth scrolling during drag for immediate response */
    user-select: none; /* Prevent text selection during drag */
}

.image-gallery-scroll::-webkit-scrollbar {
    display: none; /* Chrome, Safari, and Opera */
}

/* Add subtle fade effect at edges to indicate scrollability */
.image-gallery-scroll::before,
.image-gallery-scroll::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 20px;
    pointer-events: none;
    z-index: 1;
}

.image-gallery-scroll::before {
    left: 0;
    background: linear-gradient(to right, rgba(255, 255, 255, 0.8), transparent);
}

.image-gallery-scroll::after {
    right: 0;
    background: linear-gradient(to left, rgba(255, 255, 255, 0.8), transparent);
}

.gallery-item {
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition-all);
    position: relative;
    outline: none;
    flex: 0 0 200px; /* Default width for desktop */
}

.gallery-item:hover,
.gallery-item:focus {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.gallery-item:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.gallery-image-wrapper {
    position: relative;
    aspect-ratio: 3/4;
    overflow: hidden;
    background: var(--gray-100);
}

.gallery-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: var(--transition-all);
}

.gallery-item:hover .gallery-image {
    transform: scale(1.05);
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: var(--font-size-xl);
    opacity: 0;
    transition: var(--transition-all);
}

.gallery-item:hover .gallery-overlay,
.gallery-item:focus .gallery-overlay {
    opacity: 1;
}

/* ==========================================================================
   Enhanced Modal Styles
   ========================================================================== */

.modal-image-container {
    display: flex;
    justify-content: center;
    align-items: center;
    max-height: 80vh;
}

.modal-image {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

/* Desktop modal image sizing */
@media (min-width: 769px) {
    .modal-image-container {
        max-height: 70vh;
        max-width: 90vw;
    }
    
    .modal-image {
        max-width: 80vw;
        max-height: 70vh;
    }
}

/* ==========================================================================
   Responsive Design - Mobile First Approach
   ========================================================================== */

/* Large tablets and small desktops */
@media (max-width: 1024px) {
    .product-overview-card {
        grid-template-columns: 1fr;
        gap: var(--space-6);
        text-align: center;
    }
    
    .product-info-section {
        align-items: center;
    }
    
    .taxonomy-group {
        align-items: center;
        justify-content: center;
    }
}

/* Tablets */
@media (max-width: 768px) {
    .product-detail-main {
        padding: var(--space-4) 0 var(--space-6);
    }
    
    .product-overview-card {
        padding: var(--space-5);
        margin: 0;
        margin-bottom: var(--space-6);
        max-width: 100%;
    }
    
    .product-info-section .product-title {
        font-size: var(--font-size-2xl);
    }
    
    .product-image-section {
        display: flex;
        justify-content: center;
    }
    
    .product-image-wrapper {
        max-width: 350px;
    }
    
    .image-gallery-scroll {
        gap: var(--space-3);
    }

    .gallery-item {
        flex: 0 0 150px;
    }
    
    .action-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        min-width: auto;
    }
    
    .purchase-section {
        margin: 0 calc(-1 * var(--space-3)); /* Extend beyond container padding */
        width: calc(100vw); /* Full viewport width */
        position: relative;
        left: calc(-1 * var(--space-3));
        border-radius: 0; /* Remove border radius for full width */
    }
}

/* Mobile devices */
@media (max-width: 480px) {
    .products-container {
        padding: 0 var(--space-3);
    }
    
    .product-overview-card {
        padding: var(--space-4);
        border-radius: var(--radius-lg);
        margin: 0;
        max-width: 100%;
    }
    
    .product-image-section {
        margin-bottom: var(--space-4);
    }
    
    .product-image-wrapper {
        max-width: 100%;
    }
    
    .product-info-section {
        display: flex;
        flex-direction: column;
        gap: var(--space-4);
    }
    
    .product-header-content {
        display: flex;
        flex-direction: column;
        gap: var(--space-3);
    }
    
    .product-info-section .product-title {
        font-size: var(--font-size-xl);
        text-align: center;
        word-wrap: break-word;
    }
    
    .product-meta {
        display: flex;
        flex-direction: column;
        gap: var(--space-2);
        align-items: center;
    }
    
    .meta-badges {
        display: flex;
        justify-content: center;
        flex-wrap: wrap;
        gap: var(--space-2);
    }
    
    .product-taxonomy {
        display: flex;
        flex-direction: column;
        gap: var(--space-2);
        width: 100%;
    }
    
    .taxonomy-group {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: var(--space-2);
        width: 100%;
    }
    
    .taxonomy-label {
        text-align: center;
    }
    
    .taxonomy-tags {
        display: flex;
        justify-content: center;
        flex-wrap: wrap;
        gap: var(--space-2);
    }
    
    .purchase-section {
        padding: var(--space-4);
        margin: 0 calc(-1 * var(--space-4)); /* Extend beyond card padding */
        width: calc(100% + 2 * var(--space-4)); /* Full card width */
        position: relative;
        left: 0;
        border-radius: 0;
    }
    
    .price-container {
        text-align: center;
    }
    
    .price-display {
        display: flex;
        justify-content: center;
        align-items: baseline;
        flex-wrap: wrap;
        gap: var(--space-2);
    }
    
    .current-price {
        font-size: var(--font-size-xl);
    }
    
    .action-buttons {
        display: flex;
        flex-direction: column;
        gap: var(--space-3);
        width: 100%;
    }
    
    .btn {
        width: 100%;
    }
    
    .section-content {
        padding: var(--space-4);
    }
    
    .section-header {
        padding: var(--space-3) var(--space-4);
    }
    
    .image-gallery-scroll {
        gap: var(--space-2);
    }

    .gallery-item {
        flex: 0 0 140px;
    }
}

/* ==========================================================================
   Loading & Interactive States
   ========================================================================== */

.spinner-border-sm {
    width: 1rem;
    height: 1rem;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ==========================================================================
   Accessibility Improvements
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .product-overview-card {
        border: 2px solid var(--text-primary);
    }
    
}

/* ==========================================================================
   Related Products Section - Enhanced
   ========================================================================== */

.related-products-section {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-100);
    margin-top: var(--space-8);
}

.related-products-section .section-header {
    background: linear-gradient(135deg, var(--primary-50), var(--secondary-50));
    padding: var(--space-5) var(--space-6);
    border-bottom: 1px solid var(--gray-200);
}

.related-products-section .section-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.related-products-section .section-subtitle {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin: var(--space-2) 0 0 0;
    font-style: italic;
}

/* Related Products Grid - Using same grid system as products page */
.related-products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
    padding: var(--space-6);
}

/* Related products inherit all product card styles from products.css */
/* The .product-card class is already defined in products.css and will be used */
/* No additional styling needed for individual cards as they use the same structure */

/* Responsive adjustments for related products */
@media (max-width: 1024px) {
    .related-products-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-4);
    }
}

@media (max-width: 768px) {
    .related-products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-4);
        padding: var(--space-4);
    }
    
    .related-products-section .section-header {
        padding: var(--space-4) var(--space-4);
    }
    
    .related-products-section .section-title {
        font-size: var(--font-size-lg);
    }
}

@media (max-width: 480px) {
    .related-products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-3);
        padding: var(--space-3);
    }
}