.iss-loader {
    text-align: center;
    padding: 20px;
    display: none;
}

.spinner {
    width: 40px;
    height: 40px;
    margin: 0 auto;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

    100% {
        transform: rotate(360deg);
    }
}

.iss-post {
    opacity: 0;
    transition: opacity 0.5s ease-in;
    content-visibility: auto;
    contain-intrinsic-size: 1000px;
    /* Approximate height of a post */
}

.iss-fade-in {
    opacity: 1;
}

.iss-virtualized {
    /* Keep the space but hide content */
    overflow: hidden;
    background: #f9f9f9;
    /* Placeholder color */
}