/**
 * Lazy Load Images - Frontend Styles
 * CSS animations and styling for lazy loaded images
 */

/* Base styles for lazy load images */
.lazy-load-image {
    display: block;
    max-width: 100%;
    height: auto;
    transition: opacity 0.6s ease-in-out,
                transform 0.6s ease-in-out,
                filter 0.6s ease-in-out;
}

/* Initial state - hidden */
.lazy-load-image:not(.loaded) {
    opacity: 0;
}

/* Loading state */
.lazy-load-image.loading {
    position: relative;
    background: #f8f8f8;
}

.lazy-load-image.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #007cba;
    border-radius: 50%;
    animation: lazy-load-spin 1s linear infinite;
    z-index: 1;
}

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

/* Loaded state - visible */
.lazy-load-image.loaded {
    opacity: 1;
    transform: translateY(0) translateX(0) scale(1) !important;
    filter: blur(0) !important;
}

/* Animation Types */

/* Fade In Animation */
.lazy-load-image.fade-in:not(.loaded) {
    opacity: 0;
}

.lazy-load-image.fade-in.loaded {
    opacity: 1;
}

/* Slide Up Animation */
.lazy-load-image.slide-up:not(.loaded) {
    opacity: 0;
    transform: translateY(50px);
}

.lazy-load-image.slide-up.loaded {
    opacity: 1;
    transform: translateY(0);
}

/* Slide Down Animation */
.lazy-load-image.slide-down:not(.loaded) {
    opacity: 0;
    transform: translateY(-50px);
}

.lazy-load-image.slide-down.loaded {
    opacity: 1;
    transform: translateY(0);
}

/* Slide Left Animation */
.lazy-load-image.slide-left:not(.loaded) {
    opacity: 0;
    transform: translateX(50px);
}

.lazy-load-image.slide-left.loaded {
    opacity: 1;
    transform: translateX(0);
}

/* Slide Right Animation */
.lazy-load-image.slide-right:not(.loaded) {
    opacity: 0;
    transform: translateX(-50px);
}

.lazy-load-image.slide-right.loaded {
    opacity: 1;
    transform: translateX(0);
}

/* Zoom In Animation */
.lazy-load-image.zoom-in:not(.loaded) {
    opacity: 0;
    transform: scale(0.8);
}

.lazy-load-image.zoom-in.loaded {
    opacity: 1;
    transform: scale(1);
}

/* Zoom Out Animation */
.lazy-load-image.zoom-out:not(.loaded) {
    opacity: 0;
    transform: scale(1.2);
}

.lazy-load-image.zoom-out.loaded {
    opacity: 1;
    transform: scale(1);
}

/* Blur In Animation */
.lazy-load-image.blur-in:not(.loaded) {
    opacity: 0;
    filter: blur(10px);
}

.lazy-load-image.blur-in.loaded {
    opacity: 1;
    filter: blur(0);
}

/* Error state */
.lazy-load-image.error {
    background: #f8f8f8 url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iNDAiIGhlaWdodD0iNDAiIHZpZXdCb3g9IjAgMCA0MCA0MCIgZmlsbD0ibm9uZSIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj4KPHBhdGggZD0iTTIwIDM2QzI5LjM4ODUgMzYgMzcgMjguMzg4NSAzNyAyMEM3IDExLjYxMTUgMjkuMzg4NSA0IDIwIDRDMTAuNjExNSA0IDMgMTEuNjExNSAzIDIwQzMgMjguMzg4NSAxMC42MTE1IDM2IDIwIDM2WiIgc3Ryb2tlPSIjNzc3IiBzdHJva2Utd2lkdGg9IjIiLz4KPHN0cm9rZT0iIzc3NyIgc3Ryb2tlLXdpZHRoPSIyIiBzdHJva2UtbGluZWNhcD0icm91bmQiLz4KPHN0cm9rZT0iIzc3NyIgc3Ryb2tlLXdpZHRoPSIyIiBzdHJva2UtbGluZWNhcD0icm91bmQiLz4KPC9zdmc+');
    background-repeat: no-repeat;
    background-position: center;
    background-size: 40px 40px;
    border: 1px dashed #ccc;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100px;
    position: relative;
    opacity: 1 !important;
}

.lazy-load-image.error::before {
    content: 'Image failed to load';
    color: #777;
    font-size: 12px;
    text-align: center;
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255, 255, 255, 0.9);
    padding: 4px 8px;
    border-radius: 3px;
}

/* Placeholder styles */
.lazy-load-placeholder {
    background: #f0f0f0;
    display: inline-block;
    position: relative;
    overflow: hidden;
}

.lazy-load-placeholder::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: lazy-load-shimmer 1.5s infinite;
}

@keyframes lazy-load-shimmer {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

/* Responsive images */
.lazy-load-image {
    max-width: 100%;
    height: auto;
}

/* High DPI screens optimization */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .lazy-load-image.loading::after {
        border-width: 1px;
    }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    .lazy-load-image {
        transition: opacity 0.3s ease-in-out;
    }
    
    .lazy-load-image:not(.loaded) {
        opacity: 0.1;
    }
    
    .lazy-load-image.loaded {
        opacity: 1;
        transform: none !important;
        filter: none !important;
    }
    
    .lazy-load-image.loading::after {
        animation: none;
        border: 2px solid #007cba;
        border-radius: 50%;
    }
    
    .lazy-load-placeholder::before {
        animation: none;
    }
}

/* Print styles */
@media print {
    .lazy-load-image {
        opacity: 1 !important;
        transform: none !important;
        filter: none !important;
    }
    
    .lazy-load-image.loading::after {
        display: none;
    }
    
    .lazy-load-placeholder::before {
        display: none;
    }
}

/* Focus styles for accessibility */
.lazy-load-image:focus {
    outline: 2px solid #007cba;
    outline-offset: 2px;
}

/* Container styles for better layout */
.lazy-load-container {
    position: relative;
    display: inline-block;
    overflow: hidden;
}

.lazy-load-container .lazy-load-image {
    display: block;
    width: 100%;
    height: auto;
}

/* Gallery support */
.gallery .lazy-load-image,
.wp-block-gallery .lazy-load-image {
    transition-delay: calc(var(--lazy-delay, 0) * 100ms);
}

/* Figure element support */
figure .lazy-load-image {
    margin: 0;
}

/* Advanced animation combinations */
.lazy-load-image.slide-up.zoom-in:not(.loaded) {
    opacity: 0;
    transform: translateY(30px) scale(0.9);
}

.lazy-load-image.slide-up.zoom-in.loaded {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.lazy-load-image.fade-in.blur-in:not(.loaded) {
    opacity: 0;
    filter: blur(5px);
}

.lazy-load-image.fade-in.blur-in.loaded {
    opacity: 1;
    filter: blur(0);
}

/* Custom timing functions for different animations */
.lazy-load-image.fade-in {
    transition-timing-function: ease-out;
}

.lazy-load-image.slide-up,
.lazy-load-image.slide-down,
.lazy-load-image.slide-left,
.lazy-load-image.slide-right {
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

.lazy-load-image.zoom-in,
.lazy-load-image.zoom-out {
    transition-timing-function: cubic-bezier(0.34, 1.56, 0.64, 1);
}

.lazy-load-image.blur-in {
    transition-timing-function: ease-in-out;
}

/* Loading overlay for complex layouts */
.lazy-load-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(248, 248, 248, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
    transition: opacity 0.3s ease-in-out;
}

.lazy-load-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

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

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