How to migrate the custom css of the tutorial

tutorial-custom.scss

/*
Ce qui était avant:
*/

.tutorial-swiper__button-start {
  color: #4E3A63; // main color
  position: relative;
  transition: all .5s;
  
  &::after {
    content: "I AGREE"; // le texte qui vient remplacer la valeur par défaut
    color: white;
    left: 28px;
    position: absolute;
  }
  
  &:hover {
    color: #60919f; // secondary color, au survol
  }
  
  .fa {
    color: white;
  
  }
}

/*
doit devenir:
*/
.small-app-tutorial__start-button {
  background-color: #4E3A63; // main color
  color: #4E3A63; // main color
  position: relative;
  transition: all .5s;
  
  &::after {
    content: "I AGREE";
    color: white;
    left: 28px;
    position: absolute;
  }
  
  &:hover {
    color: #60919f;
    background-color: #60919f;
  }
  
  .fa {
    color: white;
  
  }
}