diff --git a/style/spreadquiz_mobile.css b/style/spreadquiz_mobile.css
index 37b900b..8ca30cd 100644
--- a/style/spreadquiz_mobile.css
+++ b/style/spreadquiz_mobile.css
@@ -60,4 +60,10 @@
     section.game-box-caption {
         width: 100vw;
     }
+
+    section.window {
+        width: calc(100vw - 2em);
+        padding: 1em;
+        max-height: calc(100vh - 2em);
+    }
 }
\ No newline at end of file