img.lazy,
img.lazy-load {
    background: url('/assets/images/loading-placeholder.gif') center center no-repeat;
    background-size: 50px 50px;
    min-height: 100px;
    background-color: #f3f4f6;
}

img.lazy.loaded,
img.lazy-load.loaded {
    background: none;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.skeleton-loader {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
    min-height: 200px;
    border-radius: 8px;
}

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