/**
 * Universal Lazy Loading CSS
 * This CSS can be included in any page to enable lazy loading styles for images
 */

/* Lazy loading styles */
.lazy-img {
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

/* Loading spinner for lazy images */
.lazy-img-container {
    position: relative;
}

.lazy-img-container::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #e0e0e0;
    border-top: 2px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    z-index: 1;
}

.lazy-img.loaded ~ .lazy-img-container::before {
    display: none;
}

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

/* Placeholder background for lazy images */
.lazy-img-placeholder {
    background: #f5f5f5;
    position: relative;
}

/* Optional: Add a subtle loading animation */
.lazy-img:not(.loaded) {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

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