Fix card buttons and add Github link for lending app

@theme/styles.css

@@ -559,18 +559,22 @@ html:not(.light) .feature-event {
   color: #FFF;
 }
 
-/* Fix Card Buttons Alignment */
-.redocly-card-filled {
-  min-height: 155px;
-  display: flex;
-  flex-direction: column;
+/* Align card buttons to the bottom of each card */
+.card-variant-filled > div:last-child > div:last-child {
+  flex-grow: 1;
 }
 
-.redocly-card-filled > p {
+.card-variant-filled > div:last-child > div:last-child > div:last-child {
+  display: flex;
+  flex-direction: column;
   flex-grow: 1;
 }
 
-.redocly-card-filled button {
+.card-variant-filled > div:last-child > div:last-child > div:last-child > button:last-child,
+.card-variant-filled > div:last-child > div:last-child > div:last-child > .card-actions:last-child {
   margin-top: auto;
-  display: inline-flex;
+}
+
+.card-variant-filled > div:last-child > div:last-child > div:last-child > button:last-child {
+  align-self: flex-start;
 }

components/landing.tsx

@@ -1,6 +1,7 @@
 import styled from "styled-components";
 import * as React from "react";
 import { H1, H2, Button } from "@redocly/theme";
+import { GithubIcon } from "@redocly/theme/icons/GithubIcon/GithubIcon";
 
 const Header1 = styled(H1)`
   color: white !important;
@@ -76,6 +77,56 @@ function ButtonToXRPL({ children }) {
   </XRPLStyledButton>
 }
 
+const GitHubStyledButton = styled(Button)`
+  margin-left: auto;
+  flex-shrink: 0;
+  color: var(--card-text-color);
+
+  svg path {
+    fill: currentColor;
+  }
+
+  &:hover {
+    color: var(--color-primary-base);
+  }
+`;
+
+// A button, not an anchor: the enclosing Card is already a link.
+function ButtonToGitHub({ to, label = "GitHub" }) {
+  return (
+    <GitHubStyledButton
+      variant="text"
+      size="large"
+      icon={<GithubIcon />}
+      title="View the source on GitHub"
+      onClick={(e) => {
+        e.preventDefault();
+        e.stopPropagation();
+        window.open(to, "_blank", "noopener,noreferrer");
+      }}
+    >
+      {label}
+    </GitHubStyledButton>
+  );
+}
+
+const CardActionsRow = styled.div`
+  display: flex;
+  align-items: center;
+  gap: var(--spacing-sm);
+  width: 100%;
+`;
+
+// Card CTA row, with an optional right-aligned GitHub link.
+function CardActions({ github, children }) {
+  return (
+    <CardActionsRow className="card-actions">
+      {children}
+      {github && <ButtonToGitHub to={github} />}
+    </CardActionsRow>
+  );
+}
+
 // Key Dates component for feature pages
 function KeyDatesCard(props: {
     title:string, 
@@ -141,6 +192,8 @@ export {
   LandingLayout, 
   Jumbotron, 
   ButtonToXRPL, 
+  ButtonToGitHub,
+  CardActions,
   KeyDatesCard, 
   KeyDate,
   FeatureHeader,

docs/xls-65-single-asset-vault/index.page.tsx

@@ -4,7 +4,8 @@ import {
   LandingLayout,
   FeatureHeader,
   FeatureContent,
-  ButtonToXRPL
+  ButtonToXRPL,
+  CardActions
 } from "../../components/landing";
 import { AmendmentTracker } from "../../components/AmendmentTracker";
 import { Button } from "@redocly/theme";
@@ -106,9 +107,11 @@ export default function Page() {
             <p>
               Explore a full lending platform built on the Lending Protocol and Single Asset Vaults, featuring dedicated dashboards for brokers, depositors, and borrowers.
             </p>
-            <Button size="large" variant="primary">
-              Try the Demo App
-            </Button>
+            <CardActions github="https://github.com/ripple/xrpl-reference-app-lending-sav">
+              <Button size="large" variant="primary">
+                Try the Demo App
+              </Button>
+            </CardActions>
           </Card>
           <Card
             title="Security Audit"

docs/xls-66-lending-protocol/index.page.tsx

@@ -4,7 +4,8 @@ import {
   LandingLayout,
   FeatureHeader,
   FeatureContent,
-  ButtonToXRPL
+  ButtonToXRPL,
+  CardActions
 } from "../../components/landing";
 import { AmendmentTracker } from "../../components/AmendmentTracker";
 import { Button } from "@redocly/theme";
@@ -103,9 +104,11 @@ export default function Page() {
             <p>
               Explore a full lending platform built on the Lending Protocol and Single Asset Vaults, featuring dedicated dashboards for brokers, depositors, and borrowers.
             </p>
-            <Button size="large" variant="primary">
-              Try the Demo App
-            </Button>
+            <CardActions github="https://github.com/ripple/xrpl-reference-app-lending-sav">
+              <Button size="large" variant="primary">
+                Try the Demo App
+              </Button>
+            </CardActions>
           </Card>
           <Card title="Security Audit" to="https://www.halborn.com/audits/ripple/lending-protocol-re-audit-2769d2">
             <p>