devdocs/assets/stylesheets/pages/_npm.scss

._npm {
  @extend %simple;

  .pageColumns {
    padding-left: 0;
    list-style: none;
  }

  .faint.heading {
    font-size: .9em;
    color: $textColorLight;
  }

  .youtube-video iframe { width: 420px; height: 315px; }
}