docs: reorganize newsletter archive by year using content tabs

docs/reference/newsletter-archive.md

@@ -4,53 +4,63 @@ We send a newsletter each month to share product updates, adoption metrics, and
 
 If you’re interested in receiving this update delivered directly to your email inbox, [subscribe here](https://share.hsforms.com/1uC9WaFRTQJOgZXEgplZrRQ3aanu?utm_source=hs_email&utm_medium=email&_hsenc=p2ANqtz-83CN5gNFMDIl72kAgvLBPDaiYymXt4jVuntgiYzc3hwnvhlghSYQSOYZgY_Hbqew-LzXGA).
 
-### 2026
+=== "2026"
 
-- [The January Update](https://5519226.hs-sites.com/cal-itp-benefits-the-january-update-2026)
+      <div class="grid cards" id="newsletter-cards-2026" markdown>
 
-- [The February Update](https://5519226.hs-sites.com/cal-itp-benefits-the-february-update-2026)
+      -   :material-newspaper-variant-outline: **[The January Update](https://5519226.hs-sites.com/cal-itp-benefits-the-january-update-2026)**
 
-- [The March Update](https://5519226.hs-sites.com/cal-itp-benefits-the-march-update-2026)
+          *2025 year in review*
 
-- [The April Update](https://5519226.hs-sites.com/cal-itp-benefits-the-april-update-2026)
-<!--
-- [The May Update]()
-  -->
+          ---
 
-### 2025
+          473 enrollments in 2025 (304% YoY growth), 6,646 reduced-fare transactions (138% YoY), and 3 new agencies onboarded. Also covered: the Switchio fare processor integration, an in-person enrollment beta at SBMTD and MST, and the completion of eligibility standards research for riders with disabilities.
 
-- [The March Update](https://5519226.hs-sites.com/cal-itp-benefits-the-march-update)
+      -   :material-newspaper-variant-outline: **[The February Update](https://5519226.hs-sites.com/cal-itp-benefits-the-february-update-2026)**
 
-- [The April Update](https://5519226.hs-sites.com/cal-itp-benefits-the-april-update-2025)
+          *New transit partner*
 
-- [The May Update](https://5519226.hs-sites.com/cal-itp-benefits-the-may-update-2025)
+          ---
 
-- [The June Update](https://5519226.hs-sites.com/cal-itp-benefits-the-june-update-2025)
+          El Dorado Transit Authority completed their contactless payment implementation and went live with Cal-ITP Benefits for older adults and Medicare cardholders, bringing the total to seven active agencies. The team also highlighted behind-the-scenes infrastructure work to support scalability.
 
-- [The July Update](https://5519226.hs-sites.com/cal-itp-benefits-the-july-update-2025)
+      -   :material-newspaper-variant-outline: **[The March Update](https://5519226.hs-sites.com/cal-itp-benefits-the-march-update-2026)**
 
-- [The September Update](https://5519226.hs-sites.com/cal-itp-benefits-the-sept-update-2025)
+          *New enrollment pathway*
 
-- [The October Update](https://5519226.hs-sites.com/cal-itp-benefits-the-october-update-2025)
+          ---
 
-- [The November Update](https://5519226.hs-sites.com/cal-itp-benefits-the-november-update-2025)
+          Redding Area Bus Authority (RABA) became the eighth agency to adopt Cal-ITP Benefits and the first to enable the low-income (CalFresh) enrollment pathway. Californians who receive CalFresh benefits can now verify eligibility and register a contactless card entirely online — no income disclosure or in-person visit required.
 
-### 2024
+      -   :material-newspaper-variant-outline: **[The April Update](https://5519226.hs-sites.com/cal-itp-benefits-the-april-update-2026)**
 
-- [The April Update](https://calitp-5519226.hs-sites.com/cal-itp-benefits-the-april-update)
+          *Major feature*
 
-- [The May Update](https://5519226.hs-sites.com/cal-itp-benefits-the-may-update)
+          ---
 
-- [The June Update](https://5519226.hs-sites.com/cal-itp-benefits-the-june-update)
+          Regional enrollment launched in San Luis Obispo County: a single enrollment now automatically applies reduced fares at both SLO Transit and San Luis Obispo RTA. Regional enrollment will expand to a group of transit providers in Ventura County in summer 2026. The California Mobility Marketplace also published a new "Rider Benefits" resource page devoted entirely to information about Cal-ITP Benefits.
 
-- [The July Update](https://5519226.hs-sites.com/cal-itp-benefits-the-july-update)
+      </div>
 
-- [The August Update](https://5519226.hs-sites.com/cal-itp-benefits-the-august-update)
+=== "2025"
 
-- [The September Update](https://5519226.hs-sites.com/cal-itp-benefits-the-september-update)
+    * [The March Update](https://5519226.hs-sites.com/cal-itp-benefits-the-march-update)
+    * [The April Update](https://5519226.hs-sites.com/cal-itp-benefits-the-april-update-2025)
+    * [The May Update](https://5519226.hs-sites.com/cal-itp-benefits-the-may-update-2025)
+    * [The June Update](https://5519226.hs-sites.com/cal-itp-benefits-the-june-update-2025)
+    * [The July Update](https://5519226.hs-sites.com/cal-itp-benefits-the-july-update-2025)
+    * [The September Update](https://5519226.hs-sites.com/cal-itp-benefits-the-sept-update-2025)
+    * [The October Update](https://5519226.hs-sites.com/cal-itp-benefits-the-october-update-2025)
+    * [The November Update](https://5519226.hs-sites.com/cal-itp-benefits-the-november-update-2025)
 
-- [The October Update](https://5519226.hs-sites.com/cal-itp-benefits-the-october-update)
+=== "2024"
 
-- [The November Update](https://5519226.hs-sites.com/cal-itp-benefits-the-november-update)
-
-- [The December Update](https://5519226.hs-sites.com/cal-itp-benefits-the-december-update)
+    * [The April Update](https://calitp-5519226.hs-sites.com/cal-itp-benefits-the-april-update)
+    * [The May Update](https://5519226.hs-sites.com/cal-itp-benefits-the-may-update)
+    * [The June Update](https://5519226.hs-sites.com/cal-itp-benefits-the-june-update)
+    * [The July Update](https://5519226.hs-sites.com/cal-itp-benefits-the-july-update)
+    * [The August Update](https://5519226.hs-sites.com/cal-itp-benefits-the-august-update)
+    * [The September Update](https://5519226.hs-sites.com/cal-itp-benefits-the-september-update)
+    * [The October Update](https://5519226.hs-sites.com/cal-itp-benefits-the-october-update)
+    * [The November Update](https://5519226.hs-sites.com/cal-itp-benefits-the-november-update)
+    * [The December Update](https://5519226.hs-sites.com/cal-itp-benefits-the-december-update)

mkdocs.yml

@@ -89,6 +89,7 @@ extra_css:
 markdown_extensions:
   - admonition
   - attr_list
+  - md_in_html
   - codehilite:
       linenums: true
   - mdx_truly_sane_lists