hift 5s ease infinite alternate;
}
#loading-overlay.hidden {
    display: none;
}
.loader {
    width: 50px;
    height: 50px;
    border: 6px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
#import-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
}
#import-modal