/**
 * Lazy Loading Styles
 * Provides smooth transitions and loading states for lazy-loaded resources
 * @version 1.0.0
 */

/* Base lazy image styling */
img[data-src],
img.lazy-loading {
    background: linear-gradient(90deg, #f0f0f0 0%, #e0e0e0 50%, #f0f0f0 100%);
    background-size: 200% 100%;
    animation: lazy-loading-shimmer 1.5s ease-in-out infinite;
    min-height: 100px;
}

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

/* Fade in animation when image loads */
img.lazy-loaded {
    animation: lazy-fade-in 0.5s ease-in;
}

@keyframes lazy-fade-in {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Lazy background images */
[data-bg] {
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    transition: opacity 0.5s ease-in;
}

[data-bg]:not(.lazy-bg-loaded) {
    background-color: #f0f0f0;
    opacity: 0.7;
}

.lazy-bg-loaded {
    opacity: 1;
}

/* Reduced motion support for accessibility */
@media (prefers-reduced-motion: reduce) {
    img[data-src],
    img.lazy-loading {
        animation: none;
    }
    
    img.lazy-loaded {
        animation: none;
        opacity: 1;
        transform: none;
    }
    
    [data-bg] {
        transition: none;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    img[data-src],
    img.lazy-loading {
        background: linear-gradient(90deg, #2a2a2a 0%, #1a1a1a 50%, #2a2a2a 100%);
    }
    
    [data-bg]:not(.lazy-bg-loaded) {
        background-color: #2a2a2a;
    }
}