.kb-masonry-init {
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
    position: relative;
}
.kb-masonry-init.masonry-layout-complete {
    opacity: 1;
}
.kb-masonry-init.masonry-layout-complete ~ .kb-masonry-loader {
    display: none;
}
.kb-masonry-loader {
    position: absolute;
    top: 100px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    min-height: 100px;
}
.kb-masonry-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #000;
    border-top: 5px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}