/**
 * Lazy Loading Styles
 * 
 * Provides visual feedback for lazy-loaded images.
 * Includes blur-up effect, loading states, and smooth transitions.
 * 
 * @package COBTheme
 * @since 2.0.0
 */

/* Base lazy image styles */
.lazy-image {
    opacity: 1;
    transition: opacity 0.3s ease-in-out, filter 0.3s ease-in-out;
}

/* Loading state - blur effect */
img[data-src]:not(.lazy-loaded) {
    filter: blur(5px);
    opacity: 0.7;
    background-color: #f0f0f0;
}

/* Loading animation */
.lazy-loading {
    position: relative;
    opacity: 0.7;
}

.lazy-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 30px;
    height: 30px;
    margin: -15px 0 0 -15px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #3498db;
    border-radius: 50%;
    animation: lazy-spin 1s linear infinite;
    z-index: 1;
}

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

/* Loaded state - clear and sharp */
.lazy-loaded {
    filter: none;
    opacity: 1;
    background-color: transparent;
}

/* Error state */
.lazy-error {
    opacity: 0.5;
    filter: grayscale(100%);
    background-color: #ffe6e6;
}

/* Gallery-specific lazy loading styles */
.property-gallery .lazy-image {
    width: 100%;
    height: auto;
    display: block;
}

.property-gallery img[data-src]:not(.lazy-loaded) {
    min-height: 200px;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: lazy-shimmer 1.5s infinite;
}

@keyframes lazy-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Featured image lazy loading */
.featured-image-wrapper .lazy-image {
    width: 100%;
    height: auto;
}

.featured-image-wrapper img[data-src]:not(.lazy-loaded) {
    min-height: 300px;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: lazy-shimmer 1.5s infinite;
}

/* Property card image lazy loading */
.property-card img[data-src]:not(.lazy-loaded) {
    min-height: 200px;
    aspect-ratio: 4/3;
    object-fit: cover;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: lazy-shimmer 1.5s infinite;
}

/* Thumbnail lazy loading */
.thumbnail-grid img[data-src]:not(.lazy-loaded) {
    min-height: 100px;
    aspect-ratio: 1;
    object-fit: cover;
    background-color: #f0f0f0;
}

/* Lightbox gallery lazy loading */
.lightbox-gallery img[data-src]:not(.lazy-loaded) {
    filter: blur(20px);
    transform: scale(1.1);
}

.lightbox-gallery .lazy-loaded {
    transform: scale(1);
    transition: filter 0.3s ease-in-out, transform 0.3s ease-in-out;
}

/* Responsive images with srcset */
img[data-srcset] {
    width: 100%;
    height: auto;
}

/* Print styles - show all images */
@media print {
    img[data-src]:not(.lazy-loaded) {
        filter: none !important;
        opacity: 1 !important;
    }
    
    .lazy-loading::after {
        display: none !important;
    }
}

/* Accessibility - Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    .lazy-image,
    img[data-src],
    .lazy-loaded {
        transition: none !important;
        animation: none !important;
    }
    
    .lazy-loading::after {
        animation: none !important;
    }
    
    .property-gallery img[data-src]:not(.lazy-loaded),
    .featured-image-wrapper img[data-src]:not(.lazy-loaded),
    .property-card img[data-src]:not(.lazy-loaded) {
        animation: none !important;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    img[data-src]:not(.lazy-loaded) {
        background-color: #2a2a2a;
    }
    
    .lazy-error {
        background-color: #3a1f1f;
    }
    
    .property-gallery img[data-src]:not(.lazy-loaded),
    .featured-image-wrapper img[data-src]:not(.lazy-loaded),
    .property-card img[data-src]:not(.lazy-loaded) {
        background: linear-gradient(90deg, #2a2a2a 25%, #1a1a1a 50%, #2a2a2a 75%);
        background-size: 200% 100%;
        animation: lazy-shimmer 1.5s infinite;
    }
}

/* Skeleton loading for property cards */
.property-card.loading .lazy-image {
    background: #f0f0f0;
    border-radius: 8px;
}

.property-card.loading .lazy-image::before {
    content: '';
    display: block;
    padding-top: 75%; /* 4:3 aspect ratio */
}

/* Fade-in effect for loaded images */
@keyframes lazy-fade-in {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.lazy-loaded.fade-in {
    animation: lazy-fade-in 0.4s ease-out;
}

/* Grid layout optimization - prevent layout shift */
.property-grid .lazy-image,
.gallery-grid .lazy-image {
    aspect-ratio: 4 / 3;
    object-fit: cover;
    width: 100%;
    height: auto;
}