demarches-normaliennes/app/assets/stylesheets/new_design/icons.scss

i {
  display: inline-block;
  width: 24px;
  height: 24px;
  background-size: 24px 24px;
  vertical-align: bottom;

  &.follow {
    background-image: image-url("icons/follow-folder.svg");
  }

  &.unfollow {
    background-image: image-url("icons/unfollow-folder.svg");
  }

  &.archive {
    background-image: image-url("icons/archive.svg");
  }

  &.unarchive {
    background-image: image-url("icons/unarchive.svg");
  }

  &.folder {
    background-image: image-url("icons/folder.svg");
  }
}