/* Ultimate Library Optimizer - Modern Frontend Image Display Styles */

:root {
    /* Frontend Color Palette */
    --mcos-fe-primary: #6366f1;
    --mcos-fe-primary-dark: #4f46e5;
    --mcos-fe-secondary: #a855f7;
    --mcos-fe-gray-50: #f9fafb;
    --mcos-fe-gray-100: #f3f4f6;
    --mcos-fe-gray-200: #e5e7eb;
    --mcos-fe-gray-300: #d1d5db;
    --mcos-fe-gray-400: #9ca3af;
    --mcos-fe-gray-500: #6b7280;
    --mcos-fe-gray-600: #4b5563;
    --mcos-fe-gray-700: #374151;
    --mcos-fe-gray-800: #1f2937;
    --mcos-fe-gray-900: #111827;
    
    /* Frontend Gradients */
    --mcos-fe-gradient-primary: linear-gradient(135deg, var(--mcos-fe-primary) 0%, var(--mcos-fe-secondary) 100%);
    --mcos-fe-gradient-loading: linear-gradient(90deg, var(--mcos-fe-gray-200) 25%, var(--mcos-fe-gray-100) 50%, var(--mcos-fe-gray-200) 75%);
    
    /* Frontend Shadows */
    --mcos-fe-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --mcos-fe-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --mcos-fe-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --mcos-fe-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --mcos-fe-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Frontend Border Radius */
    --mcos-fe-radius-sm: 0.125rem;
    --mcos-fe-radius: 0.25rem;
    --mcos-fe-radius-md: 0.375rem;
    --mcos-fe-radius-lg: 0.5rem;
    --mcos-fe-radius-xl: 0.75rem;
    --mcos-fe-radius-2xl: 1rem;
    --mcos-fe-radius-3xl: 1.5rem;
    --mcos-fe-radius-full: 9999px;
    
    /* Frontend Transitions */
    --mcos-fe-transition-fast: all 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --mcos-fe-transition-base: all 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --mcos-fe-transition-slow: all 500ms cubic-bezier(0.4, 0, 0.2, 1);
    --mcos-fe-transition-spring: all 500ms cubic-bezier(0.175, 0.885, 0.32, 1.275);
    
    /* Frontend Spacing */
    --mcos-fe-space-1: 0.25rem;
    --mcos-fe-space-2: 0.5rem;
    --mcos-fe-space-3: 0.75rem;
    --mcos-fe-space-4: 1rem;
    --mcos-fe-space-5: 1.25rem;
    --mcos-fe-space-6: 1.5rem;
    --mcos-fe-space-8: 2rem;
    --mcos-fe-space-10: 2.5rem;
    --mcos-fe-space-12: 3rem;
    
    /* Frontend Animation Durations */
    --mcos-fe-duration-150: 150ms;
    --mcos-fe-duration-300: 300ms;
    --mcos-fe-duration-500: 500ms;
    --mcos-fe-duration-700: 700ms;
    --mcos-fe-duration-1000: 1000ms;
    
    /* Dark Mode Colors */
    --mcos-fe-dark-bg: #0f1419;
    --mcos-fe-dark-surface: #1a1f29;
    --mcos-fe-dark-border: #2d3748;
    --mcos-fe-dark-text: #e2e8f0;
    --mcos-fe-dark-text-muted: #a0aec0;
}

/* Modern Picture Element Base Styles */
picture {
    display: inline-block;
    max-width: 100%;
    position: relative;
    background: var(--mcos-fe-gray-100);
    border-radius: var(--mcos-fe-radius-lg);
    overflow: hidden;
    transition: var(--mcos-fe-transition-base);
}

picture:hover {
    box-shadow: var(--mcos-fe-shadow-lg);
    transform: translateY(-1px);
}

picture img {
    display: block;
    width: 100%;
    height: auto;
    transition: var(--mcos-fe-transition-base);
    border-radius: var(--mcos-fe-radius-lg);
}

picture img:hover {
    transform: scale(1.02);
}

/* Enhanced Picture Element Variants */
.mcos-picture-rounded picture,
.mcos-picture-rounded picture img {
    border-radius: var(--mcos-fe-radius-2xl);
}

.mcos-picture-circular picture,
.mcos-picture-circular picture img {
    border-radius: var(--mcos-fe-radius-full);
    aspect-ratio: 1;
    object-fit: cover;
}

.mcos-picture-shadow picture {
    box-shadow: var(--mcos-fe-shadow-md);
}

.mcos-picture-shadow picture:hover {
    box-shadow: var(--mcos-fe-shadow-xl);
}

.mcos-picture-bordered picture {
    border: 2px solid var(--mcos-fe-gray-200);
    transition: var(--mcos-fe-transition-base);
}

.mcos-picture-bordered picture:hover {
    border-color: var(--mcos-fe-primary);
}

.mcos-picture-gradient picture {
    position: relative;
}

.mcos-picture-gradient picture::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 40%;
    background: linear-gradient(to top, rgba(0,0,0,0.6), transparent);
    pointer-events: none;
    opacity: 0;
    transition: var(--mcos-fe-transition-base);
}

.mcos-picture-gradient picture:hover::after {
    opacity: 1;
}

/* WordPress Block Integration */
.wp-block-image picture,
.wp-block-gallery picture,
.gallery picture {
    width: 100%;
    border-radius: var(--mcos-fe-radius-lg);
    overflow: hidden;
    box-shadow: var(--mcos-fe-shadow-sm);
    transition: var(--mcos-fe-transition-base);
    background: var(--mcos-fe-gray-50);
}

.wp-block-image picture:hover,
.wp-block-gallery picture:hover,
.gallery picture:hover {
    box-shadow: var(--mcos-fe-shadow-md);
    transform: translateY(-2px);
}

.wp-block-image figure {
    position: relative;
    overflow: hidden;
    border-radius: var(--mcos-fe-radius-lg);
}

.wp-block-gallery .wp-block-image {
    margin-bottom: var(--mcos-fe-space-4);
}

/* Gallery Grid Enhancements */
.gallery {
    display: grid;
    gap: var(--mcos-fe-space-4);
    margin: var(--mcos-fe-space-6) 0;
}

.gallery.gallery-columns-1 { grid-template-columns: 1fr; }
.gallery.gallery-columns-2 { grid-template-columns: repeat(2, 1fr); }
.gallery.gallery-columns-3 { grid-template-columns: repeat(3, 1fr); }
.gallery.gallery-columns-4 { grid-template-columns: repeat(4, 1fr); }
.gallery.gallery-columns-5 { grid-template-columns: repeat(5, 1fr); }
.gallery.gallery-columns-6 { grid-template-columns: repeat(6, 1fr); }
.gallery.gallery-columns-7 { grid-template-columns: repeat(7, 1fr); }
.gallery.gallery-columns-8 { grid-template-columns: repeat(8, 1fr); }
.gallery.gallery-columns-9 { grid-template-columns: repeat(9, 1fr); }

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--mcos-fe-radius-lg);
    background: var(--mcos-fe-gray-50);
    transition: var(--mcos-fe-transition-spring);
}

.gallery-item:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--mcos-fe-shadow-lg);
    z-index: 10;
}

.gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    color: white;
    padding: var(--mcos-fe-space-4);
    font-size: 0.875rem;
    line-height: 1.4;
    transform: translateY(100%);
    transition: var(--mcos-fe-transition-base);
}

.gallery-item:hover .gallery-caption {
    transform: translateY(0);
}

/* Elementor Compatibility */
.elementor-widget-image picture {
    width: 100%;
    border-radius: var(--mcos-fe-radius-lg);
    overflow: hidden;
    box-shadow: var(--mcos-fe-shadow-sm);
    transition: var(--mcos-fe-transition-base);
}

.elementor-widget-image picture:hover {
    box-shadow: var(--mcos-fe-shadow-md);
    transform: translateY(-2px);
}

.elementor-image picture img {
    width: 100%;
    height: auto;
    border-radius: var(--mcos-fe-radius-lg);
    transition: var(--mcos-fe-transition-base);
}

.elementor-image picture img:hover {
    transform: scale(1.02);
}

/* Elementor Gallery Enhancements */
.elementor-gallery .gallery {
    gap: var(--mcos-fe-space-3);
}

.elementor-gallery .gallery-item {
    border-radius: var(--mcos-fe-radius-md);
}

/* WooCommerce Integration */
.woocommerce-product-gallery picture,
.woocommerce-product-gallery__image picture {
    width: 100%;
    border-radius: var(--mcos-fe-radius-xl);
    overflow: hidden;
    box-shadow: var(--mcos-fe-shadow-md);
    transition: var(--mcos-fe-transition-base);
    background: var(--mcos-fe-gray-50);
    position: relative;
}

.woocommerce-product-gallery picture:hover,
.woocommerce-product-gallery__image picture:hover {
    box-shadow: var(--mcos-fe-shadow-lg);
    transform: scale(1.02);
}

.woocommerce-product-gallery__image {
    margin-bottom: var(--mcos-fe-space-4);
    position: relative;
}

.woocommerce-product-gallery .flex-control-thumbs {
    display: flex;
    gap: var(--mcos-fe-space-2);
    margin-top: var(--mcos-fe-space-4);
    flex-wrap: wrap;
}

.woocommerce-product-gallery .flex-control-thumbs li {
    flex: 0 0 auto;
    border-radius: var(--mcos-fe-radius-lg);
    overflow: hidden;
    border: 2px solid transparent;
    transition: var(--mcos-fe-transition-base);
    cursor: pointer;
}

.woocommerce-product-gallery .flex-control-thumbs li:hover,
.woocommerce-product-gallery .flex-control-thumbs li.flex-active {
    border-color: var(--mcos-fe-primary);
    box-shadow: var(--mcos-fe-shadow-md);
}

/* Background Image Fallback Styles */
[data-webp-bg],
[data-avif-bg] {
    position: relative;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    border-radius: var(--mcos-fe-radius-lg);
    overflow: hidden;
    transition: var(--mcos-fe-transition-base);
}

[data-webp-bg]:hover,
[data-avif-bg]:hover {
    transform: scale(1.02);
    box-shadow: var(--mcos-fe-shadow-md);
}

/* Modern Loading States */
picture.mcos-loading {
    position: relative;
    min-height: 200px;
    background: var(--mcos-fe-gradient-loading);
    background-size: 200% 100%;
    animation: mcos-skeleton-loading 1.5s infinite;
    border-radius: var(--mcos-fe-radius-lg);
    overflow: hidden;
}

picture.mcos-loading::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 48px;
    height: 48px;
    border: 4px solid var(--mcos-fe-gray-200);
    border-top-color: var(--mcos-fe-primary);
    border-radius: var(--mcos-fe-radius-full);
    animation: mcos-spin var(--mcos-fe-duration-1000) linear infinite;
    z-index: 2;
}

picture.mcos-loading::after {
    content: '📸';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, calc(-50% + 40px));
    font-size: 1.5rem;
    opacity: 0.5;
    z-index: 2;
}

@keyframes mcos-skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

@keyframes mcos-spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Progressive Image Loading */
picture.mcos-progressive {
    position: relative;
    overflow: hidden;
    background: var(--mcos-fe-gray-100);
}

picture.mcos-progressive img {
    opacity: 0;
    transition: opacity var(--mcos-fe-duration-500) ease;
}

picture.mcos-progressive img.loaded {
    opacity: 1;
}

picture.mcos-progressive .placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--mcos-fe-gradient-loading);
    background-size: 200% 100%;
    animation: mcos-skeleton-loading 1.5s infinite;
    z-index: 1;
}

picture.mcos-progressive img.loaded ~ .placeholder {
    opacity: 0;
    transition: opacity var(--mcos-fe-duration-300) ease;
}

/* Lazy Loading Enhancements */
picture img[loading="lazy"] {
    transition: var(--mcos-fe-transition-base);
}

picture img[loading="lazy"]:not([src]) {
    background: var(--mcos-fe-gradient-loading);
    background-size: 200% 100%;
    animation: mcos-skeleton-loading 1.5s infinite;
    min-height: 200px;
}

/* Image Optimization Indicators */
.mcos-optimized-badge {
    position: absolute;
    top: var(--mcos-fe-space-2);
    right: var(--mcos-fe-space-2);
    background: var(--mcos-fe-gradient-primary);
    color: white;
    padding: var(--mcos-fe-space-1) var(--mcos-fe-space-2);
    border-radius: var(--mcos-fe-radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: var(--mcos-fe-shadow-md);
    z-index: 10;
    opacity: 0;
    transform: translateX(20px);
    transition: var(--mcos-fe-transition-base);
}

picture:hover .mcos-optimized-badge {
    opacity: 1;
    transform: translateX(0);
}

.mcos-format-webp .mcos-optimized-badge {
    background: linear-gradient(135deg, #10b981, #059669);
}

.mcos-format-avif .mcos-optimized-badge {
    background: linear-gradient(135deg, #8b5cf6, #7c3aed);
}

/* Lightbox Integration */
.mcos-lightbox-trigger {
    cursor: zoom-in;
    position: relative;
    overflow: hidden;
    border-radius: var(--mcos-fe-radius-lg);
}

.mcos-lightbox-trigger::after {
    content: '🔍';
    position: absolute;
    top: var(--mcos-fe-space-3);
    left: var(--mcos-fe-space-3);
    background: rgba(0, 0, 0, 0.7);
    color: white;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--mcos-fe-radius-full);
    font-size: 0.875rem;
    opacity: 0;
    transform: scale(0.8);
    transition: var(--mcos-fe-transition-base);
    backdrop-filter: blur(4px);
}

.mcos-lightbox-trigger:hover::after {
    opacity: 1;
    transform: scale(1);
}

/* Error State Styling */
picture.mcos-error {
    background: linear-gradient(135deg, var(--mcos-fe-gray-100), var(--mcos-fe-gray-200));
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    border: 2px dashed var(--mcos-fe-gray-300);
    border-radius: var(--mcos-fe-radius-lg);
}

picture.mcos-error::before {
    content: '🚫';
    font-size: 2rem;
    opacity: 0.5;
}

picture.mcos-error::after {
    content: 'Image failed to load';
    position: absolute;
    bottom: var(--mcos-fe-space-4);
    font-size: 0.875rem;
    color: var(--mcos-fe-gray-600);
    font-weight: 500;
}

/* Accessibility Enhancements */
picture img[alt=""] {
    outline: 2px dashed orange;
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    picture,
    picture img,
    .gallery-item,
    [data-webp-bg],
    [data-avif-bg] {
        transition: none !important;
        animation: none !important;
    }
    
    picture:hover,
    picture img:hover,
    .gallery-item:hover {
        transform: none !important;
    }
}

@media (prefers-contrast: high) {
    picture {
        border: 2px solid var(--mcos-fe-gray-900);
    }
    
    .mcos-optimized-badge {
        background: var(--mcos-fe-gray-900) !important;
        color: white !important;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --mcos-fe-gray-50: #1a1f29;
        --mcos-fe-gray-100: #2d3748;
        --mcos-fe-gray-200: #4a5568;
        --mcos-fe-gray-300: #718096;
        --mcos-fe-gradient-loading: linear-gradient(90deg, var(--mcos-fe-gray-700) 25%, var(--mcos-fe-gray-600) 50%, var(--mcos-fe-gray-700) 75%);
    }
    
    picture,
    .wp-block-image picture,
    .wp-block-gallery picture,
    .gallery picture {
        background: var(--mcos-fe-dark-surface);
        border-color: var(--mcos-fe-dark-border);
    }
    
    .gallery-caption {
        background: linear-gradient(to top, rgba(0,0,0,0.9), transparent);
    }
    
    picture.mcos-error {
        background: linear-gradient(135deg, var(--mcos-fe-dark-surface), var(--mcos-fe-dark-bg));
        border-color: var(--mcos-fe-dark-border);
    }
    
    picture.mcos-error::after {
        color: var(--mcos-fe-dark-text-muted);
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .gallery.gallery-columns-6 { grid-template-columns: repeat(4, 1fr); }
    .gallery.gallery-columns-7 { grid-template-columns: repeat(4, 1fr); }
    .gallery.gallery-columns-8 { grid-template-columns: repeat(4, 1fr); }
    .gallery.gallery-columns-9 { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 768px) {
    picture,
    .wp-block-image picture,
    .wp-block-gallery picture,
    .gallery picture {
        border-radius: var(--mcos-fe-radius-md);
    }
    
    .gallery.gallery-columns-3 { grid-template-columns: repeat(2, 1fr); }
    .gallery.gallery-columns-4 { grid-template-columns: repeat(2, 1fr); }
    .gallery.gallery-columns-5 { grid-template-columns: repeat(2, 1fr); }
    .gallery.gallery-columns-6 { grid-template-columns: repeat(2, 1fr); }
    .gallery.gallery-columns-7 { grid-template-columns: repeat(2, 1fr); }
    .gallery.gallery-columns-8 { grid-template-columns: repeat(2, 1fr); }
    .gallery.gallery-columns-9 { grid-template-columns: repeat(2, 1fr); }
    
    .gallery-item:hover {
        transform: translateY(-2px) scale(1.01);
    }
    
    .woocommerce-product-gallery .flex-control-thumbs {
        gap: var(--mcos-fe-space-1);
    }
}

@media (max-width: 480px) {
    picture.mcos-loading {
        min-height: 150px;
    }
    
    picture.mcos-loading::before {
        width: 32px;
        height: 32px;
        border-width: 3px;
    }
    
    picture.mcos-loading::after {
        font-size: 1.25rem;
        transform: translate(-50%, calc(-50% + 30px));
    }
    
    .gallery.gallery-columns-2 { grid-template-columns: 1fr; }
    .gallery.gallery-columns-3 { grid-template-columns: 1fr; }
    .gallery.gallery-columns-4 { grid-template-columns: 1fr; }
    .gallery.gallery-columns-5 { grid-template-columns: 1fr; }
    .gallery.gallery-columns-6 { grid-template-columns: 1fr; }
    .gallery.gallery-columns-7 { grid-template-columns: 1fr; }
    .gallery.gallery-columns-8 { grid-template-columns: 1fr; }
    .gallery.gallery-columns-9 { grid-template-columns: 1fr; }
    
    .mcos-optimized-badge {
        top: var(--mcos-fe-space-1);
        right: var(--mcos-fe-space-1);
        font-size: 0.625rem;
        padding: 2px var(--mcos-fe-space-1);
    }
    
    .gallery-caption {
        padding: var(--mcos-fe-space-3);
        font-size: 0.8125rem;
    }
}

/* Print Styles */
@media print {
    picture,
    .wp-block-image picture,
    .wp-block-gallery picture,
    .gallery picture {
        box-shadow: none !important;
        transform: none !important;
        border: 1px solid #000;
    }
    
    .mcos-optimized-badge,
    .mcos-lightbox-trigger::after {
        display: none !important;
    }
    
    .gallery-caption {
        position: static;
        background: none;
        color: #000;
        transform: none;
        border-top: 1px solid #ccc;
        margin-top: 0.5rem;
        padding-top: 0.5rem;
    }
}

/* Performance Optimizations */
picture,
picture img {
    will-change: transform;
}

.gallery-item {
    contain: layout style;
}

/* Modern CSS Features */
@supports (aspect-ratio: 1) {
    .mcos-picture-square picture,
    .mcos-picture-square picture img {
        aspect-ratio: 1;
        object-fit: cover;
    }
    
    .mcos-picture-video picture,
    .mcos-picture-video picture img {
        aspect-ratio: 16/9;
        object-fit: cover;
    }
    
    .mcos-picture-portrait picture,
    .mcos-picture-portrait picture img {
        aspect-ratio: 3/4;
        object-fit: cover;
    }
}

@supports (backdrop-filter: blur(10px)) {
    .gallery-caption {
        backdrop-filter: blur(10px);
        background: rgba(0, 0, 0, 0.6);
    }
    
    .mcos-optimized-badge {
        backdrop-filter: blur(10px);
    }
    
    .mcos-lightbox-trigger::after {
        backdrop-filter: blur(8px);
    }
}

/* Container Query Support (Future-proofing) */
@supports (container-type: inline-size) {
    .gallery {
        container-type: inline-size;
    }
    
    @container (max-width: 500px) {
        .gallery {
            grid-template-columns: 1fr !important;
        }
    }
    
    @container (min-width: 501px) and (max-width: 800px) {
        .gallery.gallery-columns-3,
        .gallery.gallery-columns-4,
        .gallery.gallery-columns-5,
        .gallery.gallery-columns-6,
        .gallery.gallery-columns-7,
        .gallery.gallery-columns-8,
        .gallery.gallery-columns-9 {
            grid-template-columns: repeat(2, 1fr);
        }
    }
}