diff --git a/README.md b/README.md
index d938f39..5e91dbb 100644
--- a/README.md
+++ b/README.md
@@ -4,11 +4,11 @@ Source of https://keplertech.io.
 
 The site is one static page: `site/index.html`, with its styles and script inside the file, the demo recordings in `site/media/` and the fonts in `site/fonts/` (self-hosted, so visitors make no request to Google). There is no build step. Netlify publishes the `site` folder as-is (see `netlify.toml`, which also sets the security headers; if the page ever loads something from another site, add that site to the Content-Security-Policy there).
 
-Visit statistics are at https://keplertech.goatcounter.com. GoatCounter sets no cookies and stores no personal data, so the site needs no cookie banner. It counts page views and clicks on links to other sites (shown as events). `site/count.js` is GoatCounter's script, served from this site; to update it, download https://gc.zgo.at/count.js over it. Visits from `localhost` and `file://` are not counted.
+Visit statistics are at https://keplertech.goatcounter.com. GoatCounter sets no cookies and stores no personal data, so the site needs no cookie banner. It counts page views, clicks on links to other sites and on the contact email (shown as events). `site/count.js` is GoatCounter's script, served from this site; to update it, download https://gc.zgo.at/count.js over it. Visits from `localhost` and `file://` are not counted.
 
 To preview locally, open `site/index.html` in a browser.
 
-`site/404.html` is shown by Netlify for any missing page.
+`site/404.html` is shown by Netlify for any missing page. `site/robots.txt` and `site/sitemap.xml` are for search engines; after a significant change to the page, update the `lastmod` date in the sitemap.
 
 The icons come from `site/favicon.svg`. After editing it, regenerate the others from the repository root (needs `rsvg-convert` and `ffmpeg`, both on Homebrew):
 
diff --git a/site/index.html b/site/index.html
index 0176880..8ff28a7 100644
--- a/site/index.html
+++ b/site/index.html
@@ -643,7 +643,7 @@ <h3>Two technical co-founders, EDA veterans</h3>
     <div>
       <a class="mark" href="#top">keplertech.io</a>
       <p class="c" style="margin-top:8px">Open EDA tools, built for AI agents.</p>
-      <p style="margin-top:14px"><span class="mail">contact@keplertech.io</span></p>
+      <p style="margin-top:14px"><a class="mail" href="mailto:contact@keplertech.io">contact@keplertech.io</a></p>
     </div>
     <ul>
       <li><a href="https://github.com/keplertech">github.com/keplertech</a></li>
@@ -723,10 +723,10 @@ <h3>Two technical co-founders, EDA veterans</h3>
   draw();addEventListener('resize',draw);
   if(window.matchMedia)matchMedia('(prefers-color-scheme: dark)').addEventListener('change',draw);
 })();
-// visit statistics: count clicks on links to other sites (GitHub, PyPI, talks, ...)
+// visit statistics: count clicks on links to other sites (GitHub, PyPI, talks, ...) and on the email address
 (function(){
   function out(e){
-    var a=e.target.closest&&e.target.closest('a[href^="http"]');
+    var a=e.target.closest&&e.target.closest('a[href^="http"],a[href^="mailto:"]');
     if(!a||a.host===location.host||!window.goatcounter||!goatcounter.count)return;
     goatcounter.count({path:a.href,title:a.textContent.trim().replace(/\s+/g,' '),event:true});
   }
diff --git a/site/robots.txt b/site/robots.txt
new file mode 100644
index 0000000..8eee1b5
--- /dev/null
+++ b/site/robots.txt
@@ -0,0 +1,4 @@
+User-agent: *
+Allow: /
+
+Sitemap: https://keplertech.io/sitemap.xml
diff --git a/site/sitemap.xml b/site/sitemap.xml
new file mode 100644
index 0000000..d1ce8e9
--- /dev/null
+++ b/site/sitemap.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+  <url>
+    <loc>https://keplertech.io/</loc>
+    <lastmod>2026-10-16</lastmod>
+  </url>
+</urlset>