more verbose;decoupled timer; better ui; dark mode

static/css/mainStyle.css

@@ -101,4 +101,10 @@ body {
 placeholder {
   border: red 2px dashed;
   background-color: yellow;
+}
+
+pre {
+  overflow: auto;
+  word-wrap: normal;
+  white-space: pre;
 }