/**
 * Lazy Loading Styles for DazzleDiva Widgets
 * Provides visual feedback during image loading
 * 
 * @author DazzleDiva
 * @package DazzleDiva_Widgets
 */

/* Shimmer animation for placeholders */
@keyframes shimmer {
    0% { 
        background-position: -200% 0; 
    }
    100% { 
        background-position: 200% 0; 
    }
}

/* Placeholder styles */
.lazy-placeholder {
    display: block;
    position: relative;
    overflow: hidden;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 8px;
}

/* Lazy image states */
.lazy-image {
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}

.lazy-loaded {
    opacity: 1;
}

.lazy-error {
    background: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    font-size: 12px;
    min-height: 100px;
}

/* Hero slider specific lazy loading */
.slider-item .item-bg.lazy-placeholder {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 20px;
}

/* Product carousel specific lazy loading */
.dazzle-product-image-container {
    position: relative;
    overflow: hidden;
}

.dazzle-product-image.lazy-image,
.dazzle-product-hover-image.lazy-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.dazzle-product-image.lazy-image {
    z-index: 1;
}

.dazzle-product-hover-image.lazy-image {
    z-index: 2;
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}

.dazzle-product-image-container:hover .dazzle-product-hover-image.lazy-loaded {
    opacity: 1;
}

/* Category images lazy loading */
.jewelry-category-image.lazy-image,
.dazzle-block-category-image.lazy-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
}

/* Loading states */
.lazy-loading {
    position: relative;
}

.lazy-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 #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Responsive adjustments */
@media (max-width: 768px) {
    .lazy-placeholder {
        border-radius: 4px;
    }
    
    .slider-item .item-bg.lazy-placeholder {
        border-radius: 10px;
    }
}

/* Performance optimizations */
.lazy-image {
    will-change: opacity;
}

.lazy-placeholder {
    will-change: background-position;
}

/* Accessibility improvements */
.lazy-image[alt=""] {
    border: 2px dashed #ccc;
}

.lazy-error::before {
    content: '⚠️';
    margin-right: 5px;
}

/* Print styles */
@media print {
    .lazy-placeholder,
    .lazy-loading::after {
        display: none;
    }
    
    .lazy-image {
        opacity: 1;
    }
}