mastodon/app/javascript/styles/mastodon/rtl.scss

@use 'variables' as *;

body.rtl {
  direction: rtl;

  .reactions-bar {
    direction: rtl;
  }

  .announcements__mastodon,
  .drawer__inner__mastodon > img {
    transform: scaleX(-1);
  }

  .compose-form .autosuggest-textarea__textarea {
    padding-right: 10px;
    padding-left: 10px + 22px;
  }

  .columns-area {
    direction: rtl;
  }

  .account__avatar-wrapper {
    float: right;
  }

  .column-header__setting-arrows {
    float: left;
  }

  .admin-wrapper {
    direction: rtl;
  }

  .react-swipeable-view-container > * {
    direction: rtl;
  }

  .column-back-button__icon {
    transform: scale(-1, 1);
  }

  .dismissable-banner,
  .warning-banner {
    &__action {
      float: left;
    }
  }
}