/* Match the embedding canvas to Google's iframe, not the page's dark color-scheme.
   Scoped to Google Identity only: never restyle game/ad iframes or Google's contents. */
#credential_picker_container,
#credential_picker_iframe,
#credential_picker_container iframe,
iframe[src^="https://accounts.google.com/gsi/"] {
    color-scheme: normal !important;
    background: transparent !important;
}