.lazyhtml-loading {
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f9f9f9;
    border-radius: 8px;
    color: #666;
    margin-top:10px;
    margin-bottom:10px;
}
.lazyhtml-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #eee;
    border-top-color: #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 15px;
}
.lazyhtml-error {
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fff5f5;
    border-radius: 8px;
    color: #cf1322;
    margin-top:10px;
    margin-bottom:10px;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}