diff --git a/src/static/css/style.css b/src/static/css/style.css
index dc4f859..f6422b6 100644
--- a/src/static/css/style.css
+++ b/src/static/css/style.css
@@ -4843,14 +4843,14 @@ a.map-popup-article:hover {
 
 /* Fullscreen */
 .chat-window.fullscreen {
-    bottom: 0;
-    right: 0;
-    left: 0;
-    top: 0;
-    width: 100%;
-    height: 100%;
-    border-radius: 0;
-    border: none;
+    bottom: auto;
+    right: auto;
+    top: 50%;
+    left: 50%;
+    transform: translate(-50%, -50%);
+    width: min(700px, calc(100vw - 48px));
+    height: min(80vh, calc(100vh - 48px));
+    border-radius: 12px;
     z-index: 10000;
 }