diff --git a/index.html b/index.html
index cc3c868..4277aa0 100644
--- a/index.html
+++ b/index.html
@@ -5,6 +5,11 @@
 	<meta charset="utf-8">
 	<meta name="viewport" content="width=device-width, initial-scale=1">
 	<link rel="stylesheet" href="node_modules/shower-ribbon/styles/styles.css">
+	<style>
+        .shower {
+            --slide-ratio: calc(16 / 9);
+        }
+    </style>
 </head>
 <body class="shower list">
 
