diff --git a/app.css b/app.css
index 5cf9adf..6db9611 100644
--- a/app.css
+++ b/app.css
@@ -55,10 +55,15 @@ body {
 
 .main {
     width: 800px;
-    max-width: 100%;
     text-align: center;
 }
 
+@media (max-width: 800px) {
+    .main {
+        width: 100%;
+    }
+}
+
 .section {
     margin-top: 40px;
 }