img.lazy-init {
    opacity: 0;
    transition: opacity 0.5s ease;
}
img.lazy-loaded {
    opacity: 1;
}
.lazy-wrapper {
    position: relative;
    display: inline-block;
}
.lazy-loader {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 4px solid #f3f3f3;
    border-top: 4px solid #4dafff;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    animation: spin 1s linear infinite;
    z-index: 10;
}
@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}