diff --git a/test-theme/static/css/theme.css b/test-theme/static/css/theme.css
index c5941b7..4699221 100644
--- a/test-theme/static/css/theme.css
+++ b/test-theme/static/css/theme.css
@@ -57,7 +57,8 @@ footer {
 	text-align: right;
 }
 
-pre, tt {
+/* A fallback background for images with dark lines and transparent bg */
+pre, tt, object, img {
 	background-color: rgba(255, 255, 255, 0.2);
 	border-radius: 2pt;
 }
@@ -71,3 +72,15 @@ tt {
 	padding-left: 1pt;
 	padding-right: 1pt;
 }
+
+.figure {
+	text-align: center;
+}
+
+p {
+	text-align: justify;
+}
+
+p.caption {
+	text-align: center;
+}