diff --git a/core/modules/system/system.theme.css b/core/modules/system/system.theme.css
index dd36ce3..3643851 100644
--- a/core/modules/system/system.theme.css
+++ b/core/modules/system/system.theme.css
@@ -226,21 +226,6 @@ summary {
   padding-left: 0.5em;
   padding-right: 0.5em;
 }
-.collapse-processed > summary:before {
-  background: url(../../misc/menu-expanded.png) 0px 100% no-repeat; /* LTR */
-  content: "";
-  float: left;
-  height: 1em;
-  width: 1em;
-}
-.collapse-processed:not([open]) > summary:before {
-  background-position: 25% 35%; /* LTR */
-  -moz-transform: rotate(-90deg);
-  -ms-transform: rotate(-90deg);
-  -o-transform: rotate(-90deg);
-  -webkit-transform: rotate(-90deg);
-  transform: rotate(-90deg);
-}
 
 /**
  * TableDrag behavior.
diff --git a/core/themes/seven/style.css b/core/themes/seven/style.css
index 856037d..9a4f7e5 100644
--- a/core/themes/seven/style.css
+++ b/core/themes/seven/style.css
@@ -23,7 +23,9 @@ hr {
 summary,
 legend {
   font-weight: bold;
-  text-transform: uppercase;
+}
+summary .summary {
+  font-weight: normal;
 }
 h1,
 h2,