diff --git a/app/assets/stylesheets/application.scss b/app/assets/stylesheets/application.scss
index f94c32d9..c5cce502 100644
--- a/app/assets/stylesheets/application.scss
+++ b/app/assets/stylesheets/application.scss
@@ -583,6 +583,25 @@ $bezier: cubic-bezier(0.75, 0, 0.25, 1);
   h4 { min-height: $h4-font-size * $headings-line-height; }
   h5 { min-height: $h5-font-size * $headings-line-height; }
   h6 { min-height: $h6-font-size * $headings-line-height; }
+
+  iframe { border: 0; }
+
+  audio { width: 100%; }
+
+  img,
+  video,
+  iframe {
+    @extend .img-fluid;
+    height: auto;
+  }
+
+  & > * {
+    margin-bottom: 1rem;
+
+    &:last-child {
+      margin-bottom: 0;
+    }
+  }
 }
 
 .toggler {