wikimedia/mediawiki-extensions-UploadWizard

#upload-wizard {
    margin-top: 18px;
    max-width: 900px; /* wild guess */
}

.client-js .mwe-upwiz-unavailable {
    display: none;
}

.client-nojs #upload-wizard {
    display: none;
}

.mwe-first-spinner {
    height: 200px;
    line-height: 200px;
    text-align: center;
}