Make <hr> 1px wide and LUH-green

adapt.css

@@ -53,8 +53,10 @@ The content `<div>` is where all your content goes.
   color:#3a8ad5;
   text-decoration:underline;
 }
-hr {
-  color: #c8d317;
+hr { /* make <hr> 1px wide and LUH-green */
+  border-color: #c8d317;
+  border-style: solid;
+  border-width: 1px 0 0 0;
 }
 /* Wiki page actions */
 #wikicmds { float:right; white-space:nowrap; font-size:90%; margin-right: 12px;}