/**
 * Lazy Loading CSS Styles
 * Provides smooth loading animations and states for lazy-loaded images
 */

/* Base lazy loading states */
img[data-lazy-src] {
    transition: opacity 0.3s ease-in-out;
}

/* Loading state */
img.lazy-loading {
    opacity: 0;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading-shimmer 1.5s infinite;
}

/* Loaded state */
img.lazy-loaded {
    opacity: 1;
}

/* Error state */
img.lazy-error {
    opacity: 1;
    background-color: #f8f9fa;
    border: 2px dashed #dee2e6;
}

/* Loading shimmer animation */
@keyframes loading-shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

/* Skeleton loading for product cards */
.product-card img.lazy-loading {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading-shimmer 1.5s infinite;
    min-height: 200px;
}

/* Banner loading states */
.banner-image.lazy-loading {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading-shimmer 1.5s infinite;
}

/* Category showcase loading */
.category-showcase-image.lazy-loading {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading-shimmer 1.5s infinite;
}

/* Thumbnail loading */
.thumbnail-image.lazy-loading {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading-shimmer 1.5s infinite;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    img[data-lazy-src],
    img.lazy-loading,
    img.lazy-loaded {
        transition: none;
        animation: none;
    }
    
    img.lazy-loading {
        background: #f0f0f0;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    img.lazy-error {
        border-color: #000;
        background-color: #fff;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    img.lazy-loading {
        background: linear-gradient(90deg, #2a2a2a 25%, #3a3a3a 50%, #2a2a2a 75%);
        background-size: 200% 100%;
    }
    
    img.lazy-error {
        background-color: #2a2a2a;
        border-color: #4a4a4a;
    }
}

/* Performance optimizations */
img[data-lazy-src] {
    content-visibility: auto;
    contain-intrinsic-size: 200px 200px;
    will-change: opacity;
}

/* Optimize image rendering */
img.product-image,
img.main-product-image,
img.thumbnail-image {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

/* GPU acceleration for smoother transitions */
img.lazy-loading,
img.lazy-loaded {
    transform: translateZ(0);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

/* Optimize for mobile devices */
@media (max-width: 768px) {
    img[data-lazy-src] {
        content-visibility: auto;
        contain-intrinsic-size: 180px 180px;
    }
    
    /* Reduce animations on mobile for better performance */
    img.lazy-loading {
        animation-duration: 1s; /* Faster shimmer */
    }
}

/* Intersection observer fallback styles */
.no-intersection-observer img[data-lazy-src] {
    opacity: 1;
}