diff -u b/core/themes/bartik/css/base/elements.css b/core/themes/bartik/css/base/elements.css
--- b/core/themes/bartik/css/base/elements.css
+++ b/core/themes/bartik/css/base/elements.css
@@ -49,6 +49,26 @@
 h3 {
   font-size: 1.092em;
 }
+h4 {
+  font-size: 1.05em;
+}
+h5 {
+  font-size: 0.889em;
+  text-transform: uppercase;
+  letter-spacing: 0.1em;
+}
+h6 {
+  font-size: 0.67em;
+  text-transform: uppercase;
+  letter-spacing: 0.1em;
+}
+p {
+  margin: 0 0 1.2em;
+}
+del {
+  text-decoration: line-through;
+}
+
 /* ------------------ Reset Styles ------------------ */
 
 blockquote {