diff --git a/static/common.css b/static/common.css
index 1f819e4..4d4aff5 100644
--- a/static/common.css
+++ b/static/common.css
@@ -55,3 +55,12 @@ table {
   max-width: 100%;
   overflow-x: auto;
 }
+
+img, picture, video {
+  max-width: 100%;
+  height: auto;
+}
+
+frame, iframe {
+  max-width: 100%;
+}