edx-platform/lms/static/sass/course/_tabs.scss

div.static_tab_wrapper {
	@include box-sizing(border-box);
  padding: 2em 2.5em;

  h1 {
    @extend .top-header
  }

  section {
    margin: 0px 0px 20px;
  }

  @media print {
    border: 0;
  }
}