Make default.css defer to the color variables.

Author: tabatkins

default.css

@@ -14,6 +14,7 @@
 		position: relative;
 		clear: both;
 		color: #600;
+		color: var(--example-text);
 	}
 	pre.example,
 	pre.html,
@@ -30,6 +31,7 @@
 
 	code.html, code.xml {
 		color: #660000;
+		color: var(--example-text);
 	}
 
 /******************************************************************************/
@@ -48,6 +50,7 @@
 	pre.output {
 		margin: 1em;
 		border: solid thin silver;
+		border: solid thin var(--datacell-border);
 		padding: 0.25em;
 		display: table;
 	}