asdf

.env.example

@@ -0,0 +1,7 @@
+# Contact form (server/contact.mjs). Copy to .env for `npm run contact`; set the same in Dokploy.
+SMTP_HOST=smtp.example.com
+SMTP_PORT=587
+SMTP_USER=website@ciphercell.de
+SMTP_PASS=
+CONTACT_FROM=website@ciphercell.de
+CONTACT_TO=office@ciphercell.de

.gitignore

@@ -10,3 +10,7 @@ ds-bundle/
 .design-sync/learnings/
 .design-sync/node_modules
 .DS_Store
+# Local secrets for the contact handler
+.env
+.env.*
+!.env.example

Dockerfile

@@ -10,10 +10,21 @@ RUN npm ci --no-audit --no-fund
 COPY . .
 RUN npm run build
 
-# Serve dist/ with nginx.
+# The contact handler's production dependencies (nodemailer only).
+FROM node:22-alpine AS contact
+WORKDIR /srv/contact
+COPY server/package.json server/package-lock.json ./
+RUN npm ci --omit=dev --no-audit --no-fund
+COPY server/contact.mjs ./
+
+# Serve dist/ with nginx; POST /contact goes to the handler on 127.0.0.1:3000.
 FROM nginx:1.27-alpine AS runtime
+RUN apk add --no-cache nodejs
 COPY docker/nginx.conf /etc/nginx/conf.d/default.conf
+COPY docker/entrypoint.sh /entrypoint.sh
 COPY --from=build /app/dist /usr/share/nginx/html
+COPY --from=contact /srv/contact /srv/contact
 EXPOSE 80
+ENTRYPOINT ["/entrypoint.sh"]
 HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
   CMD wget -qO- http://127.0.0.1/healthz || exit 1

README.md

@@ -26,7 +26,8 @@ docker run --rm -p 8080:80 ciphercell   # http://localhost:8080
 
 In Dokploy: create an Application from this repository, set Build Type to **Dockerfile**
 (path `Dockerfile`), and under Domains add the domain with container port **80** and HTTPS on.
-TLS is handled by Dokploy's Traefik.
+TLS is handled by Dokploy's Traefik. The contact form needs the SMTP variables under
+Environment; see *Contact form* below.
 
 ## Where things live
 
@@ -43,6 +44,7 @@ TLS is handled by Dokploy's Traefik.
 | `src/components/verifier/*` | The CipherVerifier product page, in page order: Hero (line burst), Intro (image band), HowItWorks (five group cards, one schematic each; on wide screens the heading is sticky and the cards stack under it as you scroll), Cards, Facts, Outro. |
 | `src/components/verifier/SoonHero.astro`, `ComingSoon.astro` | The coming-soon version of `/cipherverifier`, shown while `verifierComingSoon` in `src/data/flags.ts` is true: hero on a build-time SVG relief of ridge lines in the logo blues, under the floating header, "Coming soon." with the alpha sign-up beside it, a status strip, and the product name set across the full width and cut by the hero's lower edge, release path, spec sheet and the first schematic. Copy in `ui.verifier.soon`. |
 | `src/components/verifier/diagrams.ts` | The five schematics as data: a hand-placed wide layout and an auto-generated tall spine per group. `Schematic.astro` renders either. Labels come from `ui.verifier.how.groups`; the tuple shape is in `types.ts`. Every element carries the `group` of the node it belongs to, which drives the hover focus and the draw-in order. |
+| `server/contact.mjs` | The contact form handler: validates, rate-limits and sends by SMTP. Its own `package.json`, so the image only carries nodemailer. |
 | `scripts/*.mjs` | Review tooling: `shot.mjs` (full page), `scroll-shots.mjs` (viewport by viewport), `tabs-test.mjs` (keyboard test for the sectors tabs), `contact-sheet.mjs`. Need `npx astro preview --port 4322`. |
 | `src/pages/_*.astro` | Shared page bodies. `index.astro` and `de/index.astro` render `_Home.astro` with a `lang` prop, and so on. |
 | `src/assets/images/` | Source images. Astro emits AVIF with a WebP fallback and explicit dimensions. |
@@ -56,9 +58,33 @@ TLS is handled by Dokploy's Traefik.
 
 ## Things the host has to provide
 
-- **Contact form.** The form posts `first_name`, `last_name`, `email`, `message` and a honeypot
-  field `website` to `POST /contact`, as the current site does. The handler is server-side and
-  not part of this static build.
+- **Contact form.** The form posts `first_name`, `last_name`, `email`, `message`, `lang` and a
+  honeypot field `website` to `POST /contact`. That one path is handled by `server/contact.mjs`
+  (Node, nodemailer), which sends the message by SMTP to `CONTACT_TO` with the sender as
+  Reply-To. With scripting the form sends in place and shows the result under the button;
+  without, the handler redirects to `/contact/sent` or `/contact/error` (under `/de` for German).
+  Both pages are `noindex` and left out of the sitemap. The handler caps size and field lengths,
+  refuses cross-site posts, and allows 5 messages per address per 10 minutes and 60 per hour
+  overall.
+
+  In the container, nginx proxies `/contact` to the handler on `127.0.0.1:3000`; both are started
+  by `docker/entrypoint.sh`, which restarts the handler if it crashes. If the handler is down,
+  visitors are sent to the error page. Without SMTP settings the handler does not start and the
+  rest of the site is served as usual.
+
+  | Variable | Default | Purpose |
+  |---|---|---|
+  | `SMTP_HOST` | (required) | Mail server. |
+  | `SMTP_PORT` | `587` | `587` uses STARTTLS (required), `465` TLS from the start. |
+  | `SMTP_USER`, `SMTP_PASS` | | Login. Leave unset for a server without authentication. |
+  | `CONTACT_FROM` | `SMTP_USER` | Sender address; must be one the SMTP account may send as. |
+  | `CONTACT_TO` | `office@ciphercell.de` | Where messages go. |
+  | `SMTP_SECURE` | by port | Force TLS from the start (`true`) or not (`false`). |
+  | `SMTP_REQUIRE_TLS` | `true` | `false` only for a local mail catcher. |
+
+  In Dokploy, set these under the application's Environment. Locally, put them in `.env` (see
+  `.env.example`), run `npm run contact` next to `npm run dev`; the dev server proxies `/contact`
+  to it.
 - **Alpha sign-up.** While `verifierComingSoon` in `src/data/flags.ts` is true, `/cipherverifier`
   shows a coming-soon page whose form posts `email`, `consent=yes`, `lang`,
   `list=cipherverifier-alpha` and the honeypot `website` to `POST /notify`. The handler is

astro.config.mjs

@@ -5,11 +5,13 @@ import sitemap from '@astrojs/sitemap';
 export default defineConfig({
   site: 'https://www.ciphercell.de',
   trailingSlash: 'never',
-  integrations: [sitemap({ i18n: { defaultLocale: 'en', locales: { en: 'en-GB', de: 'de-DE' } } })],
+  integrations: [sitemap({ filter: (page) => !/\/contact\//.test(page), i18n: { defaultLocale: 'en', locales: { en: 'en-GB', de: 'de-DE' } } })],
   i18n: {
     defaultLocale: 'en',
     locales: ['en', 'de'],
     routing: { prefixDefaultLocale: false },
   },
   build: { inlineStylesheets: 'auto' },
+  // In development the form posts to the contact handler started with `npm run contact`.
+  vite: { server: { proxy: { '^/contact$': { target: 'http://127.0.0.1:3000', changeOrigin: false } } } },
 });

docker/entrypoint.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+# Runs the contact handler next to nginx. The handler is restarted if it crashes, but not when it
+# exits for missing configuration (code 78); the static site is served either way.
+(
+  cd /srv/contact || exit
+  while :; do
+    node contact.mjs
+    code=$?
+    [ "$code" -eq 78 ] && { echo "contact: not started, SMTP is not configured." >&2; exit; }
+    echo "contact: exited with $code, restarting in 5 s." >&2
+    sleep 5
+  done
+) &
+
+exec nginx -g 'daemon off;'

docker/nginx.conf

@@ -7,6 +7,13 @@ server {
 
     # TLS terminates at Dokploy's Traefik; keep redirects relative so they stay on https.
     absolute_redirect off;
+
+    # The client address arrives in X-Forwarded-For from Traefik on the private network.
+    set_real_ip_from 10.0.0.0/8;
+    set_real_ip_from 172.16.0.0/12;
+    set_real_ip_from 192.168.0.0/16;
+    real_ip_header X-Forwarded-For;
+    real_ip_recursive on;
     server_tokens off;
 
     gzip on;
@@ -24,6 +31,24 @@ server {
         return 200 "ok\n";
     }
 
+    # The contact form is the one dynamic path: server/contact.mjs, sending by SMTP.
+    location = /contact {
+        limit_except POST { deny all; }
+        client_max_body_size 64k;
+        proxy_pass http://127.0.0.1:3000;
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_read_timeout 30s;
+        proxy_intercept_errors on;
+        error_page 502 503 504 = @contact_down;
+    }
+    # Handler not running: send the visitor to the error page in their language.
+    location @contact_down {
+        if ($http_referer ~ "/de(/|$|#)") { return 303 /de/contact/error; }
+        return 303 /contact/error;
+    }
+
     # trailingSlash: 'never' — /team is served from /team/index.html; /team/ redirects to /team.
     location ~ ^(.+)/$ {
         return 301 $1$is_args$args;

package.json

@@ -8,7 +8,8 @@
     "dev": "ASTRO_TELEMETRY_DISABLED=1 astro dev",
     "build": "ASTRO_TELEMETRY_DISABLED=1 astro build",
     "preview": "ASTRO_TELEMETRY_DISABLED=1 astro preview",
-    "check": "ASTRO_TELEMETRY_DISABLED=1 astro check"
+    "check": "ASTRO_TELEMETRY_DISABLED=1 astro check",
+    "contact": "node --env-file-if-exists=.env server/contact.mjs"
   },
   "dependencies": {
     "@fontsource-variable/inter-tight": "^5.3.0",

server/contact.mjs

@@ -0,0 +1,153 @@
+/**
+ * The contact form handler. nginx proxies POST /contact here; everything else on the site stays static.
+ *
+ * The form posts first_name, last_name, email, message, lang and the honeypot website. A browser
+ * with scripting asks for JSON and shows the result in place; without scripting the answer is a
+ * redirect to /contact/sent or /contact/error (under /de for German).
+ *
+ * Configuration comes from the environment only, see README.md.
+ */
+import { createServer } from 'node:http';
+import nodemailer from 'nodemailer';
+
+const env = process.env;
+const PORT = Number(env.CONTACT_PORT || 3000);
+const HOST = env.CONTACT_HOST || '127.0.0.1';
+const TO = env.CONTACT_TO || 'office@ciphercell.de';
+const FROM = env.CONTACT_FROM || env.SMTP_USER;
+const SMTP_PORT = Number(env.SMTP_PORT || 587);
+
+if (!env.SMTP_HOST || !FROM) {
+  console.error('contact: SMTP_HOST and CONTACT_FROM (or SMTP_USER) must be set.');
+  process.exit(78); // EX_CONFIG: the entrypoint does not restart on this one.
+}
+
+const transport = nodemailer.createTransport({
+  host: env.SMTP_HOST,
+  port: SMTP_PORT,
+  // 465 speaks TLS from the first byte; 587 and 25 upgrade with STARTTLS, which we then require.
+  // SMTP_REQUIRE_TLS=false is for a local mail catcher only.
+  secure: env.SMTP_SECURE ? env.SMTP_SECURE === 'true' : SMTP_PORT === 465,
+  requireTLS: env.SMTP_REQUIRE_TLS !== 'false' && SMTP_PORT !== 465,
+  auth: env.SMTP_USER ? { user: env.SMTP_USER, pass: env.SMTP_PASS } : undefined,
+});
+
+/* Limits. The body cap is generous for four short fields; the rate caps stop a flood, not a person. */
+const MAX_BODY = 32 * 1024;
+const MAX = { first_name: 100, last_name: 100, email: 254, message: 5000 };
+const PER_IP = { count: 5, windowMs: 10 * 60 * 1000 };
+const GLOBAL = { count: 60, windowMs: 60 * 60 * 1000 };
+
+const hits = new Map();
+const globalHits = [];
+function limited(ip, now = Date.now()) {
+  while (globalHits.length && now - globalHits[0] > GLOBAL.windowMs) globalHits.shift();
+  const mine = (hits.get(ip) || []).filter((t) => now - t < PER_IP.windowMs);
+  if (mine.length >= PER_IP.count || globalHits.length >= GLOBAL.count) return true;
+  mine.push(now);
+  hits.set(ip, mine);
+  globalHits.push(now);
+  return false;
+}
+setInterval(() => {
+  const now = Date.now();
+  for (const [ip, list] of hits) if (list.every((t) => now - t >= PER_IP.windowMs)) hits.delete(ip);
+}, PER_IP.windowMs).unref();
+
+const EMAIL = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+const oneLine = (s) => s.replace(/[\r\n\t]+/g, ' ').trim();
+
+function validate(form) {
+  const data = {
+    first_name: oneLine(form.get('first_name') || ''),
+    last_name: oneLine(form.get('last_name') || ''),
+    email: oneLine(form.get('email') || ''),
+    message: (form.get('message') || '').replace(/\r\n/g, '\n').trim(),
+  };
+  for (const [key, max] of Object.entries(MAX)) {
+    if (!data[key] || data[key].length > max) return null;
+  }
+  return EMAIL.test(data.email) ? data : null;
+}
+
+function readBody(req) {
+  return new Promise((resolve, reject) => {
+    let size = 0;
+    const chunks = [];
+    req.on('data', (chunk) => {
+      size += chunk.length;
+      if (size > MAX_BODY) { reject(new Error('too large')); req.destroy(); return; }
+      chunks.push(chunk);
+    });
+    req.on('end', () => resolve(Buffer.concat(chunks).toString('utf8')));
+    req.on('error', reject);
+  });
+}
+
+function reply(req, res, lang, outcome) {
+  const status = { sent: 200, invalid: 400, limited: 429, failed: 502 }[outcome];
+  if ((req.headers.accept || '').includes('application/json')) {
+    res.writeHead(status, { 'Content-Type': 'application/json', 'Cache-Control': 'no-store' });
+    res.end(JSON.stringify({ ok: outcome === 'sent', outcome }));
+    return;
+  }
+  const page = outcome === 'sent' ? 'sent' : 'error';
+  res.writeHead(303, { Location: `${lang === 'de' ? '/de' : ''}/contact/${page}`, 'Cache-Control': 'no-store' });
+  res.end();
+}
+
+const server = createServer(async (req, res) => {
+  const path = (req.url || '').split('?')[0];
+  if (path === '/contact/healthz') { res.writeHead(200).end('ok\n'); return; }
+  if (req.method !== 'POST' || path !== '/contact') { res.writeHead(404).end(); return; }
+
+  // A cross-site post is not a visitor using the form.
+  const origin = req.headers.origin;
+  const host = req.headers['x-forwarded-host'] || req.headers.host;
+  if (origin && host && new URL(origin).host !== host) { res.writeHead(403).end(); return; }
+
+  let form;
+  try {
+    form = new URLSearchParams(await readBody(req));
+  } catch {
+    res.writeHead(413).end();
+    return;
+  }
+  const lang = form.get('lang') === 'de' ? 'de' : 'en';
+
+  // Filled honeypot: answer as if sent, so the bot learns nothing.
+  if (form.get('website')) { reply(req, res, lang, 'sent'); return; }
+
+  const data = validate(form);
+  if (!data) { reply(req, res, lang, 'invalid'); return; }
+
+  // nginx sets X-Real-IP from the proxy chain; fall back to the socket for local runs.
+  const ip = req.headers['x-real-ip'] || req.socket.remoteAddress || 'unknown';
+  if (limited(String(ip))) { reply(req, res, lang, 'limited'); return; }
+
+  const name = `${data.first_name} ${data.last_name}`;
+  try {
+    await transport.sendMail({
+      from: { name: 'CipherCell website', address: FROM },
+      to: TO,
+      replyTo: { name, address: data.email },
+      subject: `Website enquiry from ${name}`,
+      text: [
+        `Name: ${name}`,
+        `Email: ${data.email}`,
+        `Language: ${lang}`,
+        '',
+        data.message,
+        '',
+        '-- ',
+        'Sent from the contact form on ciphercell.de. Reply to this email to answer.',
+      ].join('\n'),
+    });
+    reply(req, res, lang, 'sent');
+  } catch (err) {
+    console.error('contact: sending failed:', err.message);
+    reply(req, res, lang, 'failed');
+  }
+});
+
+server.listen(PORT, HOST, () => console.log(`contact: listening on ${HOST}:${PORT}, delivering to ${TO}`));

server/package-lock.json

@@ -0,0 +1,25 @@
+{
+  "name": "ciphercell-contact",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "ciphercell-contact",
+      "dependencies": {
+        "nodemailer": "^7.0.13"
+      },
+      "engines": {
+        "node": ">=20"
+      }
+    },
+    "node_modules/nodemailer": {
+      "version": "7.0.13",
+      "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-7.0.13.tgz",
+      "integrity": "sha512-PNDFSJdP+KFgdsG3ZzMXCgquO7I6McjY2vlqILjtJd0hy8wEvtugS9xKRF2NWlPNGxvLCXlTNIae4serI7dinw==",
+      "license": "MIT-0",
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    }
+  }
+}

server/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "ciphercell-contact",
+  "private": true,
+  "type": "module",
+  "description": "Receives the contact form and sends it on by SMTP. Runs next to nginx; see README.",
+  "scripts": {
+    "start": "node contact.mjs"
+  },
+  "engines": {
+    "node": ">=20"
+  },
+  "dependencies": {
+    "nodemailer": "^7.0.13"
+  }
+}

src/components/home/Contact.astro

@@ -16,7 +16,17 @@ const f = ui.contact.form;
       </address>
     </div>
 
-    <form class="contact__form" action="/contact" method="post" lang={lang}>
+    <form
+      class="contact__form"
+      action="/contact"
+      method="post"
+      lang={lang}
+      data-contact
+      data-sent={f.sent}
+      data-invalid={f.invalid}
+      data-failed={f.failed}
+    >
+      <input type="hidden" name="lang" value={lang} />
       <p class="visually-hidden" aria-hidden="true">
         <label for="website">{f.honeypot}</label>
         <input type="text" id="website" name="website" tabindex="-1" autocomplete="off" />
@@ -43,6 +53,22 @@ const f = ui.contact.form;
       </div>
     </form>
   </div>
+
+  <!-- The form's answer, as a toast in the lower left. Framed like the menu, on night. -->
+  <div
+    class="toast hud-frame"
+    data-toast
+    data-label-sending={f.toast.sending}
+    data-label-sent={f.toast.sent}
+    data-label-failed={f.toast.failed}
+  >
+    <div class="toast__head">
+      <p class="toast__label"><span data-toast-label></span><span class="toast__dots" aria-hidden="true"><span>.</span><span>.</span><span>.</span></span></p>
+      <button class="toast__close" type="button" data-toast-close>{f.toast.close}</button>
+    </div>
+    <p class="toast__message" role="status" aria-live="polite" data-toast-message></p>
+    <span class="toast__timer" aria-hidden="true" data-toast-timer></span>
+  </div>
 </section>
 
 <style>
@@ -89,6 +115,107 @@ const f = ui.contact.form;
     margin-top: var(--space-2);
   }
 
+  .contact__form[aria-busy='true'] .button { opacity: 0.6; cursor: progress; }
+
+  /* Toast: a night panel fixed in the lower right. The menu's corner crosses frame it; their arms
+     reach out onto the page, so they take the menu's line colour, not the night one. */
+  .toast {
+    --frame-color: var(--hud-line);
+    position: fixed;
+    right: var(--gutter);
+    bottom: var(--gutter);
+    z-index: 20;
+    width: min(26rem, calc(100% - 2 * var(--gutter)));
+    display: grid;
+    gap: var(--space-3);
+    padding: var(--space-4) var(--space-5) var(--space-5);
+    background: var(--night);
+    color: var(--ink-on-night);
+    /* Closed: lowered and slightly small, grown from its corner. Opening pops it up; closing
+       just sinks back, quicker and without the overshoot. */
+    opacity: 0;
+    visibility: hidden;
+    transform: translateY(var(--space-5)) scale(0.94);
+    transform-origin: bottom right;
+    transition:
+      opacity var(--dur-fast) var(--ease),
+      transform var(--dur-fast) var(--ease),
+      visibility 0s linear var(--dur-fast);
+  }
+  .toast[data-open] {
+    opacity: 1;
+    visibility: visible;
+    transform: none;
+    transition:
+      opacity var(--dur-fast) var(--ease),
+      transform var(--dur-slow) var(--ease-pop);
+  }
+  .toast__head {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    gap: var(--space-4);
+  }
+  .toast__label,
+  .toast__close {
+    font-family: var(--font-mono);
+    font-size: var(--step-micro);
+    font-weight: var(--weight-medium);
+    line-height: 1;
+    letter-spacing: var(--track-caps);
+    text-transform: uppercase;
+  }
+  .toast__label { color: var(--ink-on-night); }
+  /* While sending, three dots after the label light up one after another. */
+  .toast__dots { display: none; }
+  .toast[data-state='sending'] .toast__dots { display: inline; }
+  .toast__dots span { animation: calc(4 * var(--dur-slow)) steps(1, end) infinite; }
+  .toast__dots span:nth-child(1) { animation-name: toast-dot-1; }
+  .toast__dots span:nth-child(2) { animation-name: toast-dot-2; }
+  .toast__dots span:nth-child(3) { animation-name: toast-dot-3; }
+  .toast__close {
+    color: var(--ink-muted-on-night);
+    padding: var(--space-2);
+    margin: calc(-1 * var(--space-2));
+    transition: color var(--dur-fast) var(--ease);
+  }
+  .toast__close:hover { color: var(--ink-on-night); }
+  .toast__close:focus-visible { outline-color: var(--ink-on-night); }
+  .toast__message {
+    font-size: var(--step-small);
+    line-height: var(--leading-small);
+    color: var(--ink-muted-on-night);
+  }
+  .toast__message:empty { display: none; }
+  /* A hairline counts down the time until the toast leaves, longer for an error, which has more
+     to read. Pointer or focus pauses it. */
+  .toast__timer {
+    position: absolute;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    height: var(--hud-line-width);
+    background: var(--ink-muted-on-night);
+    transform-origin: left;
+    transform: scaleX(0);
+  }
+  .toast[data-open][data-state='sent'] .toast__timer { animation: toast-timer var(--dur-toast) linear forwards; }
+  .toast[data-open][data-state='failed'] .toast__timer { animation: toast-timer var(--dur-toast-error) linear forwards; }
+  .toast:hover .toast__timer,
+  .toast:focus-within .toast__timer { animation-play-state: paused; }
+  @keyframes toast-timer { from { transform: scaleX(1); } to { transform: scaleX(0); } }
+  /* One shared cycle in four beats: none, one, two, three dots. */
+  @keyframes toast-dot-1 { 0% { opacity: 0; } 25%, 100% { opacity: 1; } }
+  @keyframes toast-dot-2 { 0% { opacity: 0; } 50%, 100% { opacity: 1; } }
+  @keyframes toast-dot-3 { 0% { opacity: 0; } 75%, 100% { opacity: 1; } }
+
+  @media (prefers-reduced-motion: reduce) {
+    .toast, .toast[data-open] { transition: none; transform: none; }
+    .toast__dots span { animation: none; }
+    /* The timer still runs, since it dismisses the toast, but it is not drawn. */
+    .toast__timer { visibility: hidden; }
+  }
+
   @media (min-width: 48rem) {
     .contact__text { grid-column: 1 / span 5; }
     .contact__form { grid-column: 7 / span 6; }
@@ -98,3 +225,62 @@ const f = ui.contact.form;
     .field { grid-column: 1 / -1; }
   }
 </style>
+
+<script>
+  // With scripting the form sends in place and answers in a toast. Without it, the server
+  // redirects to /contact/sent or /contact/error.
+  const form = document.querySelector<HTMLFormElement>('[data-contact]');
+  const toast = document.querySelector<HTMLElement>('[data-toast]');
+  if (form && toast) {
+    const label = toast.querySelector<HTMLElement>('[data-toast-label]')!;
+    const message = toast.querySelector<HTMLElement>('[data-toast-message]')!;
+    const timer = toast.querySelector<HTMLElement>('[data-toast-timer]')!;
+    const close = toast.querySelector<HTMLButtonElement>('[data-toast-close]')!;
+    const submit = form.querySelector<HTMLButtonElement>('[type="submit"]')!;
+
+    const show = (state: 'sending' | 'sent' | 'failed', text: string) => {
+      toast.dataset.state = state;
+      toast.setAttribute('data-open', '');
+      // Restart the countdown for a second message in a row.
+      timer.style.animation = 'none';
+      void timer.offsetWidth;
+      timer.style.animation = '';
+      label.textContent = toast.dataset[`label${state[0].toUpperCase()}${state.slice(1)}`] ?? '';
+      // Set on the next frame, so the now visible live region announces it.
+      requestAnimationFrame(() => { message.textContent = text; });
+    };
+    const hide = () => {
+      if (toast.contains(document.activeElement)) submit.focus();
+      toast.removeAttribute('data-open');
+    };
+
+    timer.addEventListener('animationend', hide);
+    close.addEventListener('click', hide);
+    toast.addEventListener('keydown', (e) => { if (e.key === 'Escape') hide(); });
+
+    form.addEventListener('submit', async (event) => {
+      event.preventDefault();
+      if (form.getAttribute('aria-busy') === 'true') return;
+      form.setAttribute('aria-busy', 'true');
+      show('sending', '');
+      let outcome = 'failed';
+      try {
+        const res = await fetch(form.action, {
+          method: 'POST',
+          headers: { Accept: 'application/json' },
+          body: new URLSearchParams(new FormData(form) as unknown as Record<string, string>),
+        });
+        outcome = (await res.json()).outcome ?? 'failed';
+      } catch {
+        outcome = 'failed';
+      }
+      if (outcome === 'sent') {
+        form.reset();
+        show('sent', form.dataset.sent ?? '');
+      } else {
+        show('failed', (outcome === 'invalid' ? form.dataset.invalid : form.dataset.failed) ?? '');
+      }
+      form.removeAttribute('aria-busy');
+    });
+  }
+</script>

src/components/home/Quote.astro

@@ -207,7 +207,9 @@ const quoted = (text: string) => (lang === 'de' ? `„${text}“` : `“${text}
   @media (min-width: 64rem) {
     .quote__frame { grid-template-columns: 11fr 9fr; }
     .quote__panel { padding: var(--space-8) var(--space-8); }
-    .quote__img, :global(.quote__img) { aspect-ratio: auto; }
+    /* The image's own ratio once loaded, and the same square reserved before, so the lazy
+       portrait does not grow the section when it arrives. Both portraits are square. */
+    .quote__img, :global(.quote__img) { aspect-ratio: auto 1 / 1; }
   }
 
   @media (prefers-reduced-motion: reduce) {

src/components/home/Sectors.astro

@@ -28,7 +28,7 @@ const items = ui.sectors.items.map((item, i) => ({ ...item, image: images[i], id
                 tabindex={i === 0 ? undefined : -1}
               >{item.title}</button>
             </h3>
-            <div class="sectors__panel" role="tabpanel" id={`${item.id}-panel`} aria-labelledby={`${item.id}-tab`} tabindex="0">
+            <div class="sectors__panel" role="tabpanel" id={`${item.id}-panel`} aria-labelledby={`${item.id}-tab`} tabindex="0" data-open={i === 0 ? '' : undefined}>
               <div class="sectors__panel-inner">
                 <p class="muted">{item.body}</p>
                 <Picture
@@ -104,7 +104,8 @@ const items = ui.sectors.items.map((item, i) => ({ ...item, image: images[i], id
   /* The stage image on the right exists for wide screens. On narrow screens each panel carries its own image. */
   .sectors__media { display: none; }
 
-  /* With scripting, one panel at a time; without, everything is readable. */
+  /* With scripting, one panel at a time; without, everything is readable. The first panel is
+     open in the markup, so nothing expands on load and the page below it does not move. */
   :global(html.js) .sectors__panel {
     display: grid;
     grid-template-rows: 0fr;

src/i18n/ui.ts

@@ -156,6 +156,14 @@ const en = {
       required: 'Required.',
       honeypot: 'Leave this field empty',
       submit: 'Send message',
+      sent: 'Message sent. We respond within 24 hours.',
+      invalid: 'Please fill in every field and give a valid email address.',
+      failed: 'Your message did not go through. Please try again, or write to office@ciphercell.de.',
+      toast: { sending: 'Sending', sent: 'Sent', failed: 'Not sent', close: 'Close' },
+    },
+    result: {
+      sent: { title: 'Message sent.', body: 'Thank you. We respond within 24 hours.', link: 'Go to the start page' },
+      error: { title: 'Message not sent.', body: 'Your message did not go through. Please try again, or write to office@ciphercell.de.', link: 'Return to the form' },
     },
   },
   footer: {
@@ -288,7 +296,7 @@ const en = {
     },
   },
   team: {
-    title: ['Researchers,', 'engineers,', 'architects.'],
+    title: ['Engineers,', 'architects,', 'researchers.'],
     intro: 'The people who go deep on the problems that matter, from network, software to hardware and cloud-native systems. If it\'s a genuinely hard problem, we\'re in our element.',
     photoAlt: 'The CipherCell team on a staircase in the offices in Passau.',
     roles: {
@@ -463,6 +471,14 @@ const de: typeof en = {
       required: 'Pflichtfeld.',
       honeypot: 'Dieses Feld bitte leer lassen',
       submit: 'Nachricht senden',
+      sent: 'Nachricht gesendet. Wir antworten innerhalb von 24 Stunden.',
+      invalid: 'Bitte füllen Sie alle Felder aus und geben Sie eine gültige E-Mail-Adresse an.',
+      failed: 'Ihre Nachricht ist nicht angekommen. Bitte versuchen Sie es erneut oder schreiben Sie an office@ciphercell.de.',
+      toast: { sending: 'Wird gesendet', sent: 'Gesendet', failed: 'Nicht gesendet', close: 'Schließen' },
+    },
+    result: {
+      sent: { title: 'Nachricht gesendet.', body: 'Vielen Dank. Wir antworten innerhalb von 24 Stunden.', link: 'Zur Startseite' },
+      error: { title: 'Nachricht nicht gesendet.', body: 'Ihre Nachricht ist nicht angekommen. Bitte versuchen Sie es erneut oder schreiben Sie an office@ciphercell.de.', link: 'Zurück zum Formular' },
     },
   },
   footer: {

src/layouts/Base.astro

@@ -9,10 +9,12 @@ interface Props {
   description: string;
   lang?: Lang;
   ogImage?: string;
+  /** Pages that only make sense as the answer to an action, such as the contact form result. */
+  noindex?: boolean;
 }
 
 const lang: Lang = Astro.props.lang ?? langFromUrl(Astro.url);
-const { title, description } = Astro.props;
+const { title, description, noindex } = Astro.props;
 const ui = t(lang);
 const fullTitle = title === ui.meta.home.title ? title : `${title}. ${ui.meta.siteName}`;
 const canonical = new URL(Astro.url.pathname, Astro.site);
@@ -26,6 +28,7 @@ const altDe = new URL(switchLang(Astro.url, 'de'), Astro.site);
     <meta name="viewport" content="width=device-width, initial-scale=1" />
     <title>{fullTitle}</title>
     <meta name="description" content={description} />
+    {noindex && <meta name="robots" content="noindex" />}
     <meta name="color-scheme" content="light" />
     <meta name="theme-color" content="#E9E5DF" />
     <link rel="canonical" href={canonical} />

src/pages/_ContactResult.astro

@@ -0,0 +1,29 @@
+---
+import Base from '../layouts/Base.astro';
+import { localePath, t, type Lang } from '../i18n/ui';
+interface Props { lang: Lang; outcome: 'sent' | 'error' }
+const { lang, outcome } = Astro.props;
+const r = t(lang).contact.result[outcome];
+// After an error the way forward is the form again; after sending it is the rest of the site.
+const href = outcome === 'sent' ? localePath(lang, '/') : `${localePath(lang, '/')}#contact`;
+---
+<Base lang={lang} title={r.title} description={r.body} noindex>
+  <section class="section">
+    <div class="container grid">
+      <h1 class="display result__title">{r.title}</h1>
+      <div class="result__body">
+        <p class="muted">{r.body}</p>
+        <a class="link" href={href}>{r.link}</a>
+      </div>
+    </div>
+  </section>
+</Base>
+
+<style>
+  .result__title { grid-column: 1 / -1; }
+  .result__body { grid-column: 1 / -1; display: grid; gap: var(--space-5); max-width: var(--measure); }
+  @media (min-width: 48rem) {
+    .result__title { grid-column: 1 / span 8; }
+    .result__body { grid-column: 1 / span 5; }
+  }
+</style>

src/pages/contact/error.astro

@@ -0,0 +1,4 @@
+---
+import ContactResult from '../_ContactResult.astro';
+---
+<ContactResult lang="en" outcome="error" />

src/pages/contact/sent.astro

@@ -0,0 +1,4 @@
+---
+import ContactResult from '../_ContactResult.astro';
+---
+<ContactResult lang="en" outcome="sent" />

src/pages/de/contact/error.astro

@@ -0,0 +1,4 @@
+---
+import ContactResult from '../../_ContactResult.astro';
+---
+<ContactResult lang="de" outcome="error" />

src/pages/de/contact/sent.astro

@@ -0,0 +1,4 @@
+---
+import ContactResult from '../../_ContactResult.astro';
+---
+<ContactResult lang="de" outcome="sent" />

src/styles/tokens.css

@@ -121,6 +121,8 @@
 
   /* Motion */
   --ease: cubic-bezier(0.2, 0, 0, 1);
+  /* A small overshoot, for the one element that pops up: the contact form's toast. */
+  --ease-pop: cubic-bezier(0.34, 1.4, 0.64, 1);
   --dur-fast: 180ms;
   --dur:      240ms;
   --dur-slow: 320ms;
@@ -128,6 +130,8 @@
   --dur-rise: 700ms;      /* a headline line rising in on load */
   --delay-rise: 240ms;    /* before the first line */
   --stagger-rise: 160ms;  /* between lines */
+  --dur-toast: 6000ms;    /* a success toast stays this long */
+  --dur-toast-error: 9000ms; /* an error toast, which has more to read */
 
   /* Chrome */
   --header-height: 4.5rem;