feat: add semantic CSS stylesheets (#3274)

Co-authored-by: Cursor Agent <cursoragent@cursor.com>

docs/docs.json

@@ -4,6 +4,16 @@
 	"name": "Reactive Resume",
 	"favicon": "/favicon.svg",
 	"description": "A privacy-minded resume builder that is customizable, portable, open-source, and free to use.",
+	"redirects": [
+		{
+			"source": "/guides/using-custom-styles",
+			"destination": "/applying-custom-styles"
+		},
+		{
+			"source": "/guides/semantic-css-reference",
+			"destination": "/applying-custom-styles"
+		}
+	],
 	"seo": {
 		"indexing": "navigable",
 		"metatags": {
@@ -61,7 +71,7 @@
 							"guides/adding-a-cover-letter",
 							"guides/using-the-builder-dock",
 							"guides/undoing-changes-and-version-history",
-							"guides/using-custom-styles",
+							"applying-custom-styles",
 							"guides/using-ai-in-the-builder",
 							"guides/using-ai-agent",
 							"guides/using-private-notes",