diff --git a/index.html b/index.html
index 0b144c1..70ffdcc 100644
--- a/index.html
+++ b/index.html
@@ -5,6 +5,10 @@
     <meta charset="utf-8">
     <meta name="robots" content="noindex, nofollow">
     <style>
+      body
+      {
+        max-width: 100ch;
+      }
       label
       {
         display: block;