Short home on phones: one thing at a time, picked with chips (#21)

ddiff --git a/public/css/vision.css b/public/css/vision.css
iindex 542f7a4..81338ac 100644
---- a/public/css/vision.css
++++ b/public/css/vision.css
@@@ -267,3 +267,65 @@ html[data-ov-motion=reduced] .vi-race-img path, html[data-ov-motion=reduced] .vi
  .vi-home .sc-room-chips a { color: var(--text-primary, #eef1f6); }
  .vi-home .sc-room-chips a:hover, .vi-home .sc-room-chips a:focus-visible { color: var(--text-primary, #eef1f6); border-color: var(--room-accent); }
  .vi-status { color: var(--text-primary, #eef1f6); background: color-mix(in srgb, var(--text-primary, #eef1f6) 8%, transparent); }
++
++/* Pick (the owner's short-pages rule, 2026-10-30): on a phone the front page shows one block at a time, picked with a
++   row of chips. Radio inputs and :has(), no script: the chips and the one-block rule live under 640 px and only
++   where :has() is understood, so a wider screen, or an older browser, shows every block and no chips. */
++.pick-head { display: none; }
++.pick-row { display: none; }
++@supports selector(:has(*)) { @media (max-width: 640px) {
++  .pick-bar { margin-top: 0; }
++  .pick-head { display: block; }
++  .pick-head h2 { margin: 0 0 4px; font: 700 clamp(20px,2.4vw,28px)/1.2 var(--ov-font,'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif); letter-spacing: -.02em; }
++  .pick-row { display: flex; gap: 8px; overflow-x: auto; margin: 10px -16px 0; padding: 2px 16px 4px; scrollbar-width: none; overscroll-behavior-x: contain; }
++  .pick-row::-webkit-scrollbar { display: none; }
++  .pick-row input { position: absolute; opacity: 0; width: 1px; height: 1px; pointer-events: none; }
++  .pick-row label { display: inline-flex; align-items: center; flex: none; min-height: 44px; padding: 0 15px; border-radius: 999px; border: 1px solid var(--border, #1f2d47); color: var(--text-secondary, #96a7c2); font-size: .9rem; font-weight: 650; white-space: nowrap; cursor: pointer; }
++  .pick-row input:checked + label { color: var(--text-primary, #e6edf7); border-color: var(--accent, #3b82f6); background: color-mix(in srgb, var(--accent, #3b82f6) 12%, transparent); }
++  .pick-row input:focus-visible + label { outline: 2px solid var(--accent, #3b82f6); outline-offset: 2px; }
++  .pick .pick-pane { display: none; }
++  .pick .pick-list > li { display: none; }
++  /* The chip names the block, so the block's own heading gives way to it; the content stays in the page for the
++     crawlers and for the reader on a wide screen. */
++  .pick .sc-sec > h2, .pick section > h2, .pick > h2 { display: none; }
++} }
++
++/* The fold (the owner's short-pages rule): closed on a phone, and where there is room it looks like the section it
++   replaces: a heading and its content, with no card around it. */
++.vn-fold-block { margin-top: 32px; }
++.vn-fold-block > summary h2 { margin: 0; font: 700 clamp(19px,2.2vw,26px)/1.2 var(--ov-font,'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif); }
++.vn-fold-hint { display: none; }
++/* The fold's summary carries the heading, so the section's own heading gives way to it. */
++.vn-fold-block .sc-sec > h2, .vn-fold-block > .sc-sec > h2 { display: none; }
++@media (min-width: 641px) {
++  .vn-fold-block { border: 0; background: none; border-radius: 0; margin-top: 56px; padding: 0; }
++  .vn-fold-block > summary { display: block; min-height: 0; padding: 0; }
++  .vn-fold-block > summary h2 { margin: 0 0 6px; font: 700 clamp(22px,2.6vw,30px)/1.2 var(--ov-font,'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif); }
++  .vn-fold-block > summary span { display: none; }
++  .vn-fold-block .sc-sec { margin: 0; padding: 0; }
++}
++@media (max-width: 640px) {
++  .vn-fold-block { margin-top: 24px; }
++  .vn-fold-block > summary { cursor: pointer; }
++  .vn-fold-hint { display: inline; margin-left: 8px; font-size: .78rem; font-weight: 600; color: var(--text-secondary, #96a7c2); }
++}
++
++
++/* A link that points into a pick block opens it: the pane carries the id the link names. */
++@supports selector(:has(*)) { @media (max-width: 640px) {
++  .pick .pick-pane:target { display: block; }
++} }
++
++/* On a wide screen the pick block is invisible: its blocks sit where they were, in the order they were. */
++@media (min-width: 641px) {
++  .pick, .pick-body, .pick-pane { display: contents; }
++  .pick-bar { display: none; }
++}
++
++/* The chip names the scene, so the scene's own heading gives way to it. */
++@supports selector(:has(*)) { @media (max-width: 640px) {
++  .pick .sc-scene-text > h2 { display: none; }
++} }
++
++/* The fold's summary carries the heading, so the section's own heading gives way to it. */
++.vn-fold-block .vi-section > h2 { display: none; }
ddiff --git a/server/http/pages.js b/server/http/pages.js
iindex a492d6c..33bf1ee 100644
---- a/server/http/pages.js
++++ b/server/http/pages.js
@@@ -95,12 +95,16 @@ function createPageRoutes(ctx) {
      const formError = (message, status = 400) => ({ message, status });
  
      // ── Home ─────────────────────────────────────────────────
--    r.get('/', (req, res) => page(req, res, {
--        index: true, cache: PUBLIC_CACHE, title: null,
--        description: 'Ask a picture, read text, check a page, find your images and use local face privacy tools with consent for personal matching.',
--        jsonLd: homeJsonLd(config),
--        body: raw(views.home({ signedIn: Boolean(signedIn(req)), ai: ai.enabled })),
--    }));
++    r.get('/', (req, res) => {
++        const home = views.home({ signedIn: Boolean(signedIn(req)), ai: ai.enabled });
++        return page(req, res, {
++            index: true, cache: PUBLIC_CACHE, title: null,
++            description: 'Ask a picture, read text, check a page, find your images and use local face privacy tools with consent for personal matching.',
++            jsonLd: homeJsonLd(config),
++            body: raw(home.body),
++            inlineStyles: home.inlineStyles,
++        });
++    });
  
      r.get('/people', async (req, res) => page(req, res, { title: 'People and consent', body: raw(peopleViews.people({
          signedIn: Boolean(signedIn(req)), consents: signedIn(req) ? await faces.listConsents(req.viewer.subject) : [],
ddiff --git a/server/render/layout.js b/server/render/layout.js
iindex 37798dd..4fb8144 100644
---- a/server/render/layout.js
++++ b/server/render/layout.js
@@@ -94,6 +94,7 @@ ${appIcon.headTags({ site: 'vision' })}
  <script src="${ovServe.url('kit-web.js')}" defer></script>
  <script src="${ovServe.url('kit-data-web.js')}" defer></script>
  ${render(scripts)}
++${(o.inlineStyles || []).map((css) => `<style>${css}</style>`).join('\n')}
  <meta name="ov-boost" content="vision@${require('./html').esc(RELEASE)}">
  <script src="${require('openvibe-shared/serve').url('boost.js')}" data-main="#main" defer></script>`,
          body: `<a class="skip" href="#main">Skip to content</a>
ddiff --git a/server/render/short.js b/server/render/short.js
nnew file mode 100644
iindex 0000000..776c9ee
---- /dev/null
++++ b/server/render/short.js
@@@ -0,0 +1,109 @@
++'use strict';
++/**
++ * The home on a phone (the owner's short-pages rule, 2026-10-30): one or two screens, app-like.
++ *
++ *   pickBlock()  several blocks of the same kind, one at a time on a phone, picked with a row of chips. Radio
++ *                inputs and :has(), no script: every block stays in the page for crawlers, and a wider screen (or a
++ *                browser without :has()) shows them all and no chips.
++ *   pickList()   a list of things of the same kind, one at a time on a phone, picked with a row of chips.
++ *   foldBlock()  a part a reader rarely needs, closed on a phone and open where there is room. The page's own markup
++ *                keeps it open, so a browser without the script shows it as before; the script closes it on a narrow
++ *                screen and remembers the reader's choice.
++ *
++ * The CSS for both lives in this site's own stylesheet; the rule that shows the picked block is written for the
++ * page, because there is one per block.
++ */
++const esc = (s) => String(s == null ? '' : s).replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/"/g, '&quot;');
++
++/**
++ * A pick block. The panes are the page's own blocks; each one keeps its heading on a wide screen, and on a phone the
++ * heading gives way to the chip that names it.
++ *
++ *   pickBlock({ key, label, head, panes })   panes: [{ id, label, html }]
++ */
++function pickBlock({ key, label, head = '', panes }) {
++    // A pane with nothing to show is left out, so the chips and the rules that show them match the page.
++    panes = (panes || []).filter((p) => p.html);
++    if (!panes.length) return '';
++    const chips = panes.map((p, i) => '<input type="radio" name="pick-' + esc(key) + '" id="pk-' + esc(key) + '-' + esc(p.id) + '" value="' + esc(p.id) + '"' + (i === 0 ? ' checked' : '') + '><label for="pk-' + esc(key) + '-' + esc(p.id) + '">' + esc(p.label) + '</label>').join('');
++    const body = panes.map((p) => '<div class="pick-pane" id="' + esc(p.id) + '">' + p.html + '</div>').join('');
++    return '<div class="pick" id="pick-' + esc(key) + '"><div class="pick-bar"><div class="pick-head"><h2>' + esc(head || label) + '</h2></div><div class="pick-row" role="radiogroup" aria-label="' + esc(label) + '">' + chips + '</div></div><div class="pick-body">' + body + '</div></div>';
++}
++
++/** The rule that shows the picked block of a pick block: one per block, so the CSS is written for the page. */
++function pickRule(key, id) {
++    return '.pick:has(#pk-' + key + '-' + id + ':checked) #' + id + '{display:block}';
++}
++
++/** The rules for every block of a pick block, in the order they appear. */
++function pickRules(key, ids) {
++    return ids.map((id) => pickRule(key, id)).join('');
++}
++
++/**
++ * A pick list: a list of things of the same kind, one at a time on a phone, picked with a row of chips. The list
++ * keeps its own markup and every item stays in the page; the caller marks each item with the index its chip picks.
++ *
++ *   pickList({ key, label, head, labels, html })   labels: the chip labels, in the order of the items
++ */
++function pickList({ key, label, head = '', labels, html }) {
++    labels = labels || [];
++    if (!labels.length) return '';
++    const chips = labels.map((l, i) => '<input type="radio" name="pick-' + esc(key) + '" id="pk-' + esc(key) + '-' + i + '" value="' + i + '"' + (i === 0 ? ' checked' : '') + '><label for="pk-' + esc(key) + '-' + i + '">' + esc(l) + '</label>').join('');
++    return '<div class="pick" id="pick-' + esc(key) + '"><div class="pick-bar"><div class="pick-head"><h2>' + esc(head || label) + '</h2></div><div class="pick-row" role="radiogroup" aria-label="' + esc(label) + '">' + chips + '</div></div>' + html + '</div>';
++}
++
++/** The rule that shows the picked item of a pick list: one per item, so the CSS is written for the page. */
++function pickListRule(key, i) {
++    return '.pick#pick-' + key + ':has(#pk-' + key + '-' + i + ':checked) .pick-list>li[data-i="' + i + '"]{display:block}';
++}
++
++/** The rules for every item of a pick list. */
++function pickListRules(key, n) {
++    return Array.from({ length: n }, (_, i) => pickListRule(key, i)).join('');
++}
++
++/**
++ * A fold. The head is the heading the block had; the html is what it holds.
++ *
++ *   foldBlock({ id, head, html })
++ */
++function foldBlock({ id, head, html }) {
++    return '<details class="vn-fold vn-fold-block" id="' + esc(id) + '" open><summary>' + head + '<span class="vn-fold-hint">tap to open</span></summary>' + html + '</details>' + foldScript(id);
++}
++
++/** The script a fold carries: closed on a phone unless the reader opened it before, and it remembers that. */
++function foldScript(id) {
++    return "<script>(function(){var d=document.getElementById(" + JSON.stringify(id) + ");if(!d)return;var k='ov_fold_'+" + JSON.stringify(id) + ";var s=null;try{s=localStorage.getItem(k)}catch(e){}if(s==='open'){d.open=true;return}if(s==='closed'){d.open=false;return}var t=0;if(window.matchMedia&&window.matchMedia('(max-width:640px)').matches){t=Date.now();d.open=false}d.addEventListener('toggle',function(){if(Date.now()-t<300)return;try{localStorage.setItem(k,d.open?'open':'closed')}catch(e){}})})();</script>";
++}
++
++
++/**
++ * A part of a page's own markup, found by the heading it carries: the site can then show it in a pick block or a
++ * fold. { start, end, html } — the section that holds the needle.
++ */
++function part(html, needle) {
++    const at = html.indexOf(needle);
++    if (at < 0) return null;
++    const start = html.lastIndexOf('<section', at);
++    const close = html.indexOf('</section>', at);
++    if (start < 0 || close < 0) return null;
++    const end = close + '</section>'.length;
++    return { start, end, html: html.slice(start, end) };
++}
++
++/** The same part, but replaced by something else. */
++function swap(html, needle, withHtml) {
++    const p = part(html, needle);
++    if (!p) return html;
++    return html.slice(0, p.start) + withHtml + html.slice(p.end);
++}
++
++/** The part that carries this heading, as a fold: closed on a phone, the section it was where there is room. */
++function foldAround(html, needle, id, head) {
++    const p = part(html, needle);
++    if (!p) return html;
++    return html.slice(0, p.start) + foldBlock({ id, head, html: p.html }) + html.slice(p.end);
++}
++
++module.exports = { pickBlock, pickRule, pickRules, pickList, pickListRule, pickListRules, foldBlock, foldScript, part, swap, foldAround };
ddiff --git a/server/views/index.js b/server/views/index.js
iindex 24d4d64..86cd26b 100644
---- a/server/views/index.js
++++ b/server/views/index.js
@@@ -7,6 +7,8 @@
   */
  const { esc, time } = require('../render/html');
  const sc = require('openvibe-shared/showcase');
++// The short home (the owner's rule, 2026-10-30): pick blocks and folds.
++const { pickBlock, pickRules, foldAround } = require('../render/short');
  
  const MODEL_LABEL = (a) => (a && a.model ? `${a.provider ? `${a.provider}:` : ''}${a.model}` : 'the local engine');
  
@@@ -77,8 +79,34 @@ ${signedIn ? '' : '<p class="vi-fine">Reading, watching and the page check work
              ['Are my images stored?', 'General answers keep no image bytes. An opt-in face library stores encrypted uploads and vectors privately; turning its purposes off erases derived data. Account export and deletion include those rows.'],
          ] },
      });
--    const at = room.indexOf('<section class="sc-room-scenes"');
--    return `<div class="vi-wrap vi-home" id="vi-home">${at < 0 ? room : room.slice(0, at) + tryIt + room.slice(at)}</div>`;
++    // The short home (the owner's rule, 2026-10-30): the four scenes are one pick block, a row of chips picks one
++    // of them, and the parts a reader rarely needs are folds.
++    const sceneTitles = ['A receipt, read for nothing', 'The same image, side by side', 'The UI check catches the overflow', 'Faces, only with consent'];
++    const arts = [...room.matchAll(/<article class="sc-scene[\s\S]*?<\/article>/g)];
++    let html = room;
++    if (arts.length) {
++        const first = arts[0];
++        const last = arts[arts.length - 1];
++        const start = html.lastIndexOf('<section class="sc-room-scenes"', first.index);
++        const end = html.indexOf('</section>', last.index + last[0].length) + '</section>'.length;
++        const pick = pickBlock({
++            key: 'scenes',
++            label: 'What Vision does',
++            head: 'What Vision does',
++            panes: arts.map((a, i) => ({ id: `vi-scene-${i}`, label: sceneTitles[i] || `Scene ${i + 1}`, html: a[0] })),
++        });
++        // The section stays: its scenes are the pick block's panes, and a wide screen shows them as they were.
++        html = start > 0 && end > 0 ? html.slice(0, start) + html.slice(start, html.indexOf('>', start) + 1) + pick + '</section>' + html.slice(end) : html;
++    }
++    const at = html.indexOf('<div class="pick" id="pick-scenes">');
++    html = at < 0 ? html : html.slice(0, at) + tryIt + html.slice(at);
++    html = foldAround(html, '>Works across OpenVibe</h2>', 'net', '<h2 id="vi-net-h">Works across OpenVibe</h2>');
++    html = foldAround(html, '>Questions</h2>', 'faq', '<h2 id="vi-faq-h">Questions</h2>');
++    return {
++        body: `<div class="vi-wrap vi-home" id="vi-home">${html}</div>`,
++        // The rule that shows the picked scene of the pick block: one per scene, written for this page.
++        inlineStyles: [`@supports selector(:has(*)){@media (max-width:640px){${pickRules('scenes', arts.map((_, i) => `vi-scene-${i}`))}}}`],
++    };
  }
  
  function signIn({ title, text, next }) {
ddiff --git a/test/home-short.test.js b/test/home-short.test.js
nnew file mode 100644
iindex 0000000..0fb72a8
---- /dev/null
++++ b/test/home-short.test.js
@@@ -0,0 +1,45 @@
++'use strict';
++const assert = require('assert');
++const { boot, check, done } = require('./helpers/boot');
++(async () => {
++    const t = await boot();
++    try {
++        await check('the scenes are one pick block: a chip per scene, the first picked, every scene in the page', async () => {
++            const r = await t.get('/');
++            assert.strictEqual(r.status, 200, r.text);
++            const page = r.text;
++            const start = page.indexOf('<div class="pick" id="pick-scenes">');
++            assert.ok(start > 0, 'the pick block is on the home');
++            const block = page.slice(start, start + 8000);
++            assert.match(block, /<div class="pick-row" role="radiogroup" aria-label="What Vision does">/);
++            const chips = [...block.matchAll(/<input type="radio" name="pick-scenes" id="pk-scenes-(vi-scene-\d+)" value="(vi-scene-\d+)"( checked)?><label for="pk-scenes-vi-scene-\d+">([^<]+)<\/label>/g)];
++            assert.strictEqual(chips.length, 4, 'a chip per scene (' + chips.length + ')');
++            assert.deepStrictEqual(chips.filter((m) => m[3]).map((m) => m[1]), [chips[0][1]], 'the first scene is picked');
++            const scenes = [...block.matchAll(/<article class="sc-scene/g)];
++            assert.strictEqual(scenes.length, chips.length, 'every scene is in the page');
++            for (const m of chips) assert.ok(block.includes('id="' + m[1] + '"'), 'the pane of ' + m[1] + ' is in the page');
++        });
++        await check('the CSS guard: the chips are hidden and the scenes all show until 640 px and where :has() is understood', async () => {
++            const r = await t.get('/');
++            const page = r.text;
++            assert.match(page, /<style>@supports selector\(:has\(\*\)\)\{@media \(max-width:640px\)\{\.pick:has\(#pk-scenes-vi-scene-0:checked\) #vi-scene-0\{display:block\}/, 'the rule that shows the picked scene');
++            const css = require('fs').readFileSync(require('path').join(__dirname, '..', 'public', 'css', 'vision.css'), 'utf8');
++            assert.match(css, /\.pick-row \{ display: none; \}/, 'the chips are hidden by default');
++            assert.match(css, /@supports selector\(:has\(\*\)\) \{ @media \(max-width: 640px\) \{/, 'the phone rules are under :has() and 640 px');
++            assert.match(css, /\.pick-row label \{[^}]*min-height: 44px/, 'a chip is a 44 px target');
++            assert.match(css, /\.pick \.pick-pane \{ display: none; \}/, 'the scenes are hidden on a phone');
++        });
++        await check('the parts a reader rarely needs are folds, open in the page and closed on a phone', async () => {
++            const r = await t.get('/');
++            const page = r.text;
++            for (const id of ['net', 'faq']) {
++                assert.ok(page.includes('<details class="vn-fold vn-fold-block" id="' + id + '" open>'), id + ' is a fold, open in the page');
++                assert.ok(page.includes('document.getElementById("' + id + '")'), id + ' has the script that closes it on a phone');
++            }
++            assert.match(page, /<h2 id="vi-net-h">Works across OpenVibe<\/h2>/);
++            assert.match(page, /<h2 id="vi-faq-h">Questions<\/h2>/);
++        });
++    } finally {
++        await done(t);
++    }
++})().catch((e) => { console.error(e); process.exit(1); });