.compose-form__publish-button-wrapper button {
  color: rgba(255,255,255,0);
}

.compose-form__publish-button-wrapper button::before {
  content: "Tröt!";
  position: absolute;
  top: 50%;
  left: 50%;
  color: rgba(255,255,255,1);
  transform: translate3d(-50%, -50%, 0);
}