Tweak CSS for answer

app.py

@@ -239,13 +239,23 @@ gradio-app h2, .gradio-app h2 {
 
 #answer {
     overflow-y: scroll;
-    height: 42px;
     color: white;
     background: #666;
     border-color: #666;
     font-size: 20px;
     font-weight: bold;
 }
+
+#answer span {
+    color: white;
+}
+
+#answer textarea {
+    color:white;
+    background: #777;
+    border-color: #777;
+    font-size: 18px;
+}
 """
 
 with gr.Blocks(css=CSS) as demo: