.session-expire-dialog .ui-dialog-titlebar-close {
    display: none !important;
  } 
  .ui-widget-overlay {
    background: rgba(0,0,0,0.5) !important;
    opacity: 1 !important;
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    z-index: 1000 !important;
  }
  .ui-dialog {
    z-index: 1100 !important; 
  }