/* Lazy Loading and Image Optimization Styles */

/* Lazy loading placeholder */
.lazy {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
    min-height: 200px;
}

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

/* Loaded state */
.lazy.loaded {
    background: none;
    animation: none;
}

/* Error state */
.error-fallback {
    border: 2px dashed #ddd;
    background-color: #f9f9f9;
    opacity: 0.7;
}

/* Progressive enhancement */
.progressive-image {
    position: relative;
    overflow: hidden;
}

.progressive-image .lazy {
    filter: blur(5px);
    transform: scale(1.05);
    transition: filter 0.3s, transform 0.3s;
}

.progressive-image .lazy.loaded {
    filter: blur(0);
    transform: scale(1);
}

/* Responsive image containers */
.image-container {
    position: relative;
    overflow: hidden;
}

.image-container::before {
    content: '';
    display: block;
    padding-top: 66.66%; /* 3:2 aspect ratio */
}

.image-container img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Mobile optimization */
@media (max-width: 768px) {
    .lazy {
        min-height: 150px;
    }
    
    .image-container::before {
        padding-top: 75%; /* 4:3 aspect ratio for mobile */
    }
}

/* Loading spinner for critical images */
.critical-image {
    position: relative;
}

.critical-image::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 30px;
    height: 30px;
    margin: -15px 0 0 -15px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.critical-image.loaded::after {
    display: none;
}

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