diff --git a/index.html b/index.html
index 412c798..019ffd3 100644
--- a/index.html
+++ b/index.html
@@ -5,8 +5,23 @@
     <link rel="stylesheet" type="text/css" href="style.css" />
     <script src="https://unpkg.com/fengari-web/dist/fengari-web.js"></script>
     <script type="application/lua" src="index.lua"></script>
+    <style>
+    body {
+        background: #8CBAFA;
+    }
+    #formspec_output {
+        position: fixed;
+        top: 0;
+        left: 0;
+        width: 100%;
+        height: 100%;
+        display: flex;
+        justify-content: center;
+        align-items: center;
+    }
+    </style>
 </head>
-<body style="background: #8CBAFA;">
-    <div id="formspec_output" style="position: fixed; left: 50%; top: 50%; transform: translate(-50%, -50%);"></div>
+<body>
+    <div id="formspec_output"></div>
 </body>
 </html>
