diff --git a/src/css/main.css b/src/css/main.css
index 2b3680f..b5614b5 100644
--- a/src/css/main.css
+++ b/src/css/main.css
@@ -45,6 +45,12 @@ main>h2 {
   margin-left: 0.2em;
 }
 
+img {
+  display: block;
+  margin: 0 auto;
+  max-width: 100%;
+}
+
 ul.dashed {
   list-style-type: '- ';
 }