diff --git a/autofill/index.html b/autofill/index.html
index 4989ee6..e173411 100644
--- a/autofill/index.html
+++ b/autofill/index.html
@@ -32,10 +32,12 @@
 
       html {
         margin: 0;
+        padding: 0;
       }
 
       body {
-        margin: var(--basic-size) auto;
+        margin: 0 auto;
+        padding: var(--basic-size) 0;
         max-width: min(800px, calc(100vw - 2 * var(--basic-size)));
         max-height: calc(100vh - 2 * var(--basic-size));
         display: flex;