atom.styles.less

/*
 * Your Stylesheet
 *
 * This stylesheet is loaded when Atom starts up and is reloaded automatically
 * when it is changed and saved.
 *
 * Add your own CSS or Less to fully customize Atom.
 * If you are unfamiliar with Less, you can read more about it here:
 * http://lesscss.org
 */

atom-text-editor,
atom-text-editor::shadow {
  .gutter {
    .line-number {
      &.git-line-added,
      &.git-line-modified {
        border-left-width: 5px;
      }
      .git-line-removed:before {
        bottom: -8px;
        border-width: 8px;
      }
    }
  }
}