text: export default ({ duration }) => ({
      "fade-default": {
        transition: `opacity ${duration}ms ease-in`,
        opacity: 0
      },
    
      "fade-entering": {
        opacity: 0
      },
    
      "fade-entered": {
        opacity: 1
      },
    
      "fade-exiting": {
        opacity: 0
      },
    
      "fade-exited": {
        opacity: 0
      }
    });