diff --git a/12/shell.html b/12/shell.html
index 76e9539..4204ddb 100644
--- a/12/shell.html
+++ b/12/shell.html
@@ -8,17 +8,17 @@ body {
     background: #888;
 }
 body.connected {
-    background: white;
+    background: none;
 }
 #shell {
     white-space: pre-wrap;
-    height: 25em;
+    height: 100%;
     width: 100%;
 
     font-family: monospace;
     color: white;
     font-size: 14px;
-    background: black;
+    background: none;
     overflow-y: auto;
 }
 </style>