Topcoat Root Element Root element with default fallbacks if css variables not set. html { font-size: var(base-font-size, 12px);} body { margin: 0; padding: 0; font-family: var(font-family, "Source Sans Pro", "HelveticaNeue-Light", "Helvetica Neue Light", "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif); font-weight: var(font-weight, 400); background: var(background--body, hsla(200, 2%, 30%, 1));} :focus { outline-color: transparent; outline-style: none;}