diff --git a/index.html b/index.html
index 8dbe659..88325f8 100644
--- a/index.html
+++ b/index.html
@@ -3,6 +3,7 @@
 <head>
   <meta charset="UTF-8">
   <title>Когнитивный тест</title>
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
   <style>
     body { font-family: sans-serif; background: #f7f7f9; max-width: 440px; margin: 0 auto; padding: 1.5em;}
     #test-card { background: #fff; border-radius: 10px; padding: 2em; box-shadow: 0 4px 18px #0001;}
