Index: openacs-4/packages/chat/www/resources/chat.css
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/chat/www/resources/Attic/chat.css,v
diff -u -r1.4 -r1.5
--- openacs-4/packages/chat/www/resources/chat.css	25 Oct 2018 13:27:11 -0000	1.4
+++ openacs-4/packages/chat/www/resources/chat.css	25 Oct 2018 16:52:58 -0000	1.5
@@ -7,7 +7,7 @@
     height:100%;
     float: left;
     padding: 10px;
-    border: 1px black solid;
+    border: 1px solid #ddd;
     margin-right:1%;
     overflow: auto;
 }
@@ -17,13 +17,14 @@
     height:100%;
     float: left;
     padding: 10px;
-    border: 1px black solid;
+    border: 1px solid #ddd;
     overflow: auto;
 }
 
 /* Clear floats after the columns */
 #xowiki-chat {
-    height:257px;
+    height: 600px;
+    width: 100%;
     margin-bottom: 1%;
     resize: both;
     overflow: hidden;
@@ -37,3 +38,26 @@
     resize: both;
     overflow: hidden;
 }
+
+#xowiki-chat-send {
+    width: 100%;
+}
+
+/* Responsive design */
+@media (max-width: 780px) {
+    #xowiki-chat {
+        display: flex;
+        flex-direction: column;
+    }
+    #xowiki-chat-users {
+        width: 100%;
+        height: 20%;
+        order: 1;
+        margin-bottom: 1%;
+    }
+    #xowiki-chat-messages {
+        width: 100%;
+        height: 80%;
+        order: 2;
+    }
+}
Index: openacs-4/packages/xowiki/tcl/chat-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowiki/tcl/chat-procs.tcl,v
diff -u -r1.34 -r1.35
--- openacs-4/packages/xowiki/tcl/chat-procs.tcl	24 Oct 2018 17:02:51 -0000	1.34
+++ openacs-4/packages/xowiki/tcl/chat-procs.tcl	25 Oct 2018 16:52:58 -0000	1.35
@@ -139,8 +139,8 @@
          <div id='xowiki-chat-users'></div>
       </div>
       <form id='xowiki-chat-messages-form' action='#'>
-         $message_label <input type='text' size='40' name='msg' id='xowiki-chat-send'>
-         <input type="submit" value="$send_label">
+        <input type='text' placeholder="$message_label" name='msg' id='xowiki-chat-send'>
+        <input type="hidden" value="$send_label">
       </form>
     }]