/**
 * Lazy Loading Styles
 * Smooth fade-in animations for lazy-loaded images
 */

/* Lazy image container */
.lazy-image {
    opacity: 0;
    transition: opacity 0.3s ease;
    background: #f0f0f0;
    min-height: 200px;
    display: block;
}

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

/* Loading state - shimmer effect */
.lazy-image:not(.loaded):not(.error) {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading-shimmer 1.5s infinite;
}

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

/* Error state */
.lazy-image.error {
    opacity: 0.5;
    background: #f8f8f8;
}

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

/* Background image lazy loading */
[data-bg-image] {
    transition: opacity 0.3s ease;
}

[data-bg-image].bg-loading {
    opacity: 0.7;
}

[data-bg-image].bg-loaded {
    opacity: 1;
}

[data-bg-image].bg-error {
    opacity: 0.5;
    background-color: #f8f8f8;
}

/* Content card images - preserve aspect ratio during loading */
.content-card img.lazy-image,
.card-media img.lazy-image {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    object-fit: cover;
}

/* Training thumbnail lazy loading */
.training-thumbnail.lazy-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

/* Blog featured image lazy loading */
.featured-image.lazy-image {
    width: 100%;
    height: auto;
    max-height: 400px;
    object-fit: cover;
}

/* Profile picture lazy loading */
.profile-picture.lazy-image {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .lazy-image {
        min-height: 150px;
    }
}