diff --git a/go.mod b/go.mod
index c5477fd..89d6694 100644
--- a/go.mod
+++ b/go.mod
@@ -1,5 +1,5 @@
 module github.com/go-widgets/go-widgets.github.io
 
-go 1.27.2
+go 1.27.3
 
-require github.com/go-fleettools/landingkit v0.3.2
+require github.com/go-fleettools/landingkit v0.6.0
diff --git a/go.sum b/go.sum
index 480fd33..44b5185 100644
--- a/go.sum
+++ b/go.sum
@@ -1,2 +1,2 @@
-github.com/go-fleettools/landingkit v0.3.2 h1:Hy3XWXf/Q4uNYER1vlDqSzzqjycE/GsSsxyafxN0P5c=
-github.com/go-fleettools/landingkit v0.3.2/go.mod h1:c9Lz9cz1DOwHwH+/qustJ8xJmR+0DzZb2ezpk0+WyfE=
+github.com/go-fleettools/landingkit v0.6.0 h1:lIlazNZ3xTWDSti/16Uo+aSUOFPhVniQaEnILbQmJuE=
+github.com/go-fleettools/landingkit v0.6.0/go.mod h1:gBpbziqFcmcjtNknPjy5+AAzGZ5L+pPr9mIJZHpDlZc=
diff --git a/hugo.toml b/hugo.toml
index 7bdd8bb..835e9fc 100644
--- a/hugo.toml
+++ b/hugo.toml
@@ -185,3 +185,8 @@ disableKinds = ["taxonomy", "term", "RSS", "sitemap", "404"]
 [[params.surfaces]]
   name = "Android"
   how = "A real APK: a Java host blits a memfd the Go process paints; input and accessibility cross a socket. arm64."
+
+# The strip under the top bar: the code's licence and cgo, and the data
+# shipped under its own licence (read from its licence files).
+[params.mantra]
+  items = ["LICENSE=BSD-3-Clause", "CGO_ENABLED=0", "icons: Apache-2.0, CC0-1.0"]
diff --git a/layouts/index.html b/layouts/index.html
index c251ab3..5edf741 100644
--- a/layouts/index.html
+++ b/layouts/index.html
@@ -19,7 +19,7 @@
   <div class="hero"><div class="wrap">
     <div>
       <h1 class="head">One widget tree,<br><span class="accent">every surface.</span></h1>
-      <p class="sub"><b>A widget that calls the platform's own button is as portable as the least capable platform it targets.</b> go-widgets draws every widget itself, through one small painter interface, and lets a back-end decide whether that becomes the pixels of a window, a browser canvas, an Android surface — or the cells of a terminal. Pure Go, <code>CGO_ENABLED=0</code>. BSD-3-Clause.</p>
+      <p class="sub"><b>A widget that calls the platform's own button is as portable as the least capable platform it targets.</b> go-widgets draws every widget itself, through one small painter interface, and lets a back-end decide whether that becomes the pixels of a window, a browser canvas, an Android surface — or the cells of a terminal. {{ if not (partial "mantra-on.html" $) }}Pure Go, <code>CGO_ENABLED=0</code>.{{ end }} {{ if not (partial "mantra-on.html" $) }}BSD-3-Clause.{{ end }}</p>
       <div class="cta">
         <a class="btn btn-primary" href="https://go-widgets.github.io/docs/">{{ partial "icons/book.html" . }}Read the documentation →</a>
         <a class="btn btn-ghost" href="https://go-widgets.github.io/gallery/">{{ partial "icons/play.html" . }}Try it in the browser</a>
@@ -123,6 +123,6 @@ <h2>A UI toolkit that ships like Go.</h2>
     </div>
   </div></section>
 
-  <footer><div class="wrap"><span>© the go-widgets authors · BSD-3-Clause</span><span>Pure Go · CGO_ENABLED=0 · no frameworks</span></div></footer>
+  <footer><div class="wrap"><span>© the go-widgets authors{{ if not (partial "mantra-on.html" $) }} · BSD-3-Clause{{ end }}</span><span>Pure Go · {{ if not (partial "mantra-on.html" $) }}CGO_ENABLED=0 · {{ end }}no frameworks</span></div></footer>
 </body>
 </html>