/home/preegmxb/gymnyou.com/wp-content/plugins/kirki/kirki-packages/control-editor/src/control.scss
.customize-control-kirki-editor {
  textarea {
    width: 100%;
  }
}
Path: home/preegmxb/gymnyou.com/wp-content/plugins/kirki/kirki-packages/control-editor/src