diff --git a/theme/base/style/core.css b/theme/base/style/core.css
index 69070804aa8..d2e72cf6124 100644
--- a/theme/base/style/core.css
+++ b/theme/base/style/core.css
@@ -2027,4 +2027,16 @@ body.lockscroll {
 .editor_atto_menu .moodle-dialogue-content {
     padding: 0px;
     border: inherit;
+
+.well {
+  min-height: 20px;
+  padding: 19px;
+  background-color: #f5f5f5;
+  border: 1px solid #e3e3e3;
+  border-radius: 4px;
+  box-shadow: inset 0 1px 1px rgba(0,0,0,0.05);
+}
+
+.well-small {
+  padding: 9px;
 }