fix: minor correction for non-chroma pre/code blocks

Signed-off-by: jolheiser <john.olheiser@gmail.com>

internal/html/base.templ

@@ -23,4 +23,3 @@ templ base(bc BaseContext) {
 		</body>
 	</html>
 }
-

internal/html/generate.css

@@ -3,6 +3,11 @@
   color: rgb(var(--ctp-text));
 }
 
+.markdown code,
+.markdown pre {
+  background-color: rgb(var(--ctp-base));
+}
+
 .markdown a {
   color: rgb(var(--ctp-blue));
   text-decoration-line: underline;