main.less

/*
 * Your Stylesheet
 *
 * This stylesheet is loaded when Atom starts up and is reloaded automatically
 * when it is changed.
 *
 * If you are unfamiliar with LESS, you can read more about it here:
 * http://www.lesscss.org
 */

.tree-view {

}

.editor {
}

atom-text-editor::shadow {
  .flint-error {
    background: rgba(255, 0, 0, 0.04);
    box-sizing: border-box;
    border-left: 2px solid red;
    &> .source { margin-left: -2px }
  }
}

.editor .cursor {

}