Issue 5651 - Set relative values for strong and small elements

static/scss/_reset.scss

 // This file is part of website-defaults
 // Copyright (C) 2016-present eyeo GmbH
 //
 // website-defaults is free software: you can redistribute it and/or
 // modify it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // website-defaults is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 120 matching lines @@
 {
   border-collapse: collapse;
   border-spacing: 0;
 }
 
 /* Normalize inline content (opinionated) */
 
 b,
 strong
 {
-  font-weight: $bold-weight;
+  font-weight: bolder;
 }
 
 small
 {
-  font-size: $small-font;
+  font-size: smaller;
 }
 
 abbr
 {
   text-decoration: underline;
   cursor: help;
 }
 
 sup
 {
@@ skipping 27 matching lines @@
   /* Remove the border on images inside links in IE 10-. */
   border-style: none;
 }
 
 /* Set correct display for hidden attribute in IE 10-  */
 
 [hidden]
 {
   display: none;
 }