diff --git a/src/static/styles/main.css b/src/static/styles/main.css
index dc863df..fce547f 100644
--- a/src/static/styles/main.css
+++ b/src/static/styles/main.css
@@ -67,6 +67,17 @@ figure {
     padding: 0;
 }
 
+img {
+    max-width: 100%;
+    box-sizing: border-box;
+}
+
+iframe {
+    width: 100%;
+    height: auto;
+    aspect-ratio: 16/9;
+}
+
 
 /* Lists
    ========================================================================== */