.ahs-formstack-api-embed-iframe {
  /*
   * Using min-width to set the width of the iFrame, works around an issue
   * in iOS that can prevent the iFrame from sizing correctly.
   * See
   * https://stackoverflow.com/questions/49749442/workaround-to-ios-11-webkit-iframe-bugs.
   */
  display: block;
  width: 1px !important;
  min-width: 100%;
  /* IframeResizer will override when it adjusts the height and widget. */
  overflow: auto;
}