diff --git a/core/themes/bartik/css/components/captions.css b/core/themes/bartik/css/components/captions.css
index cd24809..601f16b 100644
--- a/core/themes/bartik/css/components/captions.css
+++ b/core/themes/bartik/css/components/captions.css
@@ -1,17 +1,21 @@
-/* -------------- Captions -------------- */
+/*
+* @file
+* Bartik styling for captions.
+*/
+
 .caption {
   margin-bottom: 1.2em;
 }
 .caption > * {
-  background: #F3F3F3;
-  padding: 0.5ex;
-  border: 1px solid #CCC;
+  background: #f3f3f3;
+  padding: 0.5em;
+  border: 1px solid #ccc;
 }
 .caption > figcaption {
-  border: 1px solid #CCC;
+  border: 1px solid #ccc;
   border-top: none;
-  padding-top: 0.5ex;
-  font-size: small;
+  padding-top: 0.5em;
+  font-size: 0.85em;
   text-align: center;
 }
 
@@ -28,4 +32,4 @@
 }
 [dir="rtl"] .caption-blockquote > figcaption {
   text-align: right;
-}
+}
\ No newline at end of file