diff --git a/.gitignore b/.gitignore
index 3150f45..ade87d4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,6 +15,7 @@ node_modules/
 # Documentation site build artifacts
 docs-site/.astro/
 docs-site/dist/
+docs-site/public/demo/runtime/
 docs-site/src/content/docs/
 
 # WebApp build artifacts (regenerated by `npm run build:webapp` / Docker build)
@@ -34,6 +35,11 @@ bot/app/web/templates/subscription_webapp_admin.min.*.js.br
 bot/app/web/templates/subscription_webapp_admin.min.*.js.gz
 bot/app/web/templates/subscription_webapp_admin.*.css.br
 bot/app/web/templates/subscription_webapp_admin.*.css.gz
+bot/app/web/templates/subscription_webapp_docs_demo.css
+bot/app/web/templates/subscription_webapp_docs_demo.js
+bot/app/web/templates/subscription_webapp_docs_demo.*.css
+bot/app/web/templates/subscription_webapp_docs_demo.*.css.br
+bot/app/web/templates/subscription_webapp_docs_demo.*.css.gz
 backend/bot/app/web/templates/subscription_webapp.css
 backend/bot/app/web/templates/subscription_webapp.js
 backend/bot/app/web/templates/subscription_webapp.min.*.js
@@ -50,6 +56,11 @@ backend/bot/app/web/templates/subscription_webapp_admin.min.*.js.br
 backend/bot/app/web/templates/subscription_webapp_admin.min.*.js.gz
 backend/bot/app/web/templates/subscription_webapp_admin.*.css.br
 backend/bot/app/web/templates/subscription_webapp_admin.*.css.gz
+backend/bot/app/web/templates/subscription_webapp_docs_demo.css
+backend/bot/app/web/templates/subscription_webapp_docs_demo.js
+backend/bot/app/web/templates/subscription_webapp_docs_demo.*.css
+backend/bot/app/web/templates/subscription_webapp_docs_demo.*.css.br
+backend/bot/app/web/templates/subscription_webapp_docs_demo.*.css.gz
 tmp
 .claude
 
diff --git a/docs-site/package.json b/docs-site/package.json
index 72fc667..f1be9ed 100644
--- a/docs-site/package.json
+++ b/docs-site/package.json
@@ -3,8 +3,9 @@
   "type": "module",
   "scripts": {
     "sync:docs": "node ./scripts/sync-docs.mjs",
-    "dev": "npm run sync:docs && astro dev",
-    "build": "npm run sync:docs && astro build",
+    "build:demo": "node ./scripts/build-demo-runtime.mjs",
+    "dev": "npm run sync:docs && npm run build:demo && astro dev",
+    "build": "npm run sync:docs && npm run build:demo && astro build",
     "preview": "astro preview"
   },
   "dependencies": {
diff --git a/docs-site/scripts/build-demo-runtime.mjs b/docs-site/scripts/build-demo-runtime.mjs
new file mode 100644
index 0000000..e8fac26
--- /dev/null
+++ b/docs-site/scripts/build-demo-runtime.mjs
@@ -0,0 +1,149 @@
+import { spawn } from 'node:child_process';
+import { access, copyFile, mkdir, readdir, readFile, rm, writeFile } from 'node:fs/promises';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const siteRoot = path.resolve(fileURLToPath(new URL('..', import.meta.url)));
+const repoRoot = path.resolve(siteRoot, '..');
+const frontendRoot = path.join(repoRoot, 'frontend');
+const runtimeDir = path.join(siteRoot, 'public', 'demo', 'runtime');
+const templatesDir = path.join(repoRoot, 'backend', 'bot', 'app', 'web', 'templates');
+const themesDir = path.join(repoRoot, 'backend', 'bot', 'app', 'web', 'themes');
+const localesDir = path.join(repoRoot, 'locales');
+const runtimeBase = '/demo/runtime';
+const isWindows = process.platform === 'win32';
+const npmExecPath = process.env.npm_execpath || '';
+
+function run(command, args, options = {}) {
+  return new Promise((resolve, reject) => {
+    const child = spawn(command, args, {
+      cwd: repoRoot,
+      stdio: 'inherit',
+      shell: false,
+      ...options,
+    });
+    child.on('error', reject);
+    child.on('exit', (code) => {
+      if (code === 0) {
+        resolve();
+        return;
+      }
+      reject(new Error(`${command} ${args.join(' ')} exited with code ${code}`));
+    });
+  });
+}
+
+function runNpm(args) {
+  if (npmExecPath) {
+    return run(process.execPath, [npmExecPath, ...args]);
+  }
+  return run(isWindows ? 'npm.cmd' : 'npm', args, { shell: isWindows });
+}
+
+async function pathExists(targetPath) {
+  try {
+    await access(targetPath);
+    return true;
+  } catch (_error) {
+    return false;
+  }
+}
+
+async function ensureFrontendDependencies() {
+  const viteBin = isWindows
+    ? path.join(frontendRoot, 'node_modules', '.bin', 'vite.cmd')
+    : path.join(frontendRoot, 'node_modules', '.bin', 'vite');
+  if (await pathExists(viteBin)) return;
+  await runNpm(['--prefix', frontendRoot, 'ci']);
+}
+
+async function copyDirectory(sourceDir, targetDir, transform = null) {
+  await mkdir(targetDir, { recursive: true });
+  const entries = await readdir(sourceDir, { withFileTypes: true });
+  for (const entry of entries) {
+    const sourcePath = path.join(sourceDir, entry.name);
+    const targetPath = path.join(targetDir, entry.name);
+    if (entry.isDirectory()) {
+      await copyDirectory(sourcePath, targetPath, transform);
+      continue;
+    }
+    if (!entry.isFile()) continue;
+    if (transform) {
+      const handled = await transform(sourcePath, targetPath);
+      if (handled) continue;
+    }
+    await mkdir(path.dirname(targetPath), { recursive: true });
+    await copyFile(sourcePath, targetPath);
+  }
+}
+
+async function copyThemeFile(sourcePath, targetPath) {
+  if (path.extname(sourcePath).toLowerCase() !== '.css') return false;
+  const css = await readFile(sourcePath, 'utf8');
+  const rewritten = css.replace(/\/webapp-theme-assets\//g, `${runtimeBase}/themes/`);
+  await mkdir(path.dirname(targetPath), { recursive: true });
+  await writeFile(targetPath, rewritten, 'utf8');
+  return true;
+}
+
+async function copyRuntimeAsset(name) {
+  await copyFile(path.join(templatesDir, name), path.join(runtimeDir, name));
+}
+
+function jsonScriptPayload(value) {
+  return JSON.stringify(value).replace(/</g, '\\u003c');
+}
+
+async function demoI18nPayload() {
+  const [ru, en] = await Promise.all([
+    readFile(path.join(localesDir, 'ru.json'), 'utf8'),
+    readFile(path.join(localesDir, 'en.json'), 'utf8'),
+  ]);
+  return jsonScriptPayload({ ru: JSON.parse(ru), en: JSON.parse(en) });
+}
+
+async function appHtml() {
+  const i18n = await demoI18nPayload();
+  return `<!doctype html>
+<html lang="ru">
+  <head>
+    <meta charset="utf-8" />
+    <meta
+      name="viewport"
+      content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no, viewport-fit=cover"
+    />
+    <meta name="robots" content="noindex, nofollow" />
+    <meta name="theme-color" content="#03070b" />
+    <title>Remnawave Minishop Demo</title>
+    <link rel="stylesheet" href="${runtimeBase}/subscription_webapp_docs_demo.css" />
+  </head>
+  <body>
+    <main id="app">
+      <div class="app-boot-fallback" role="status" aria-label="Loading demo"></div>
+    </main>
+    <script id="i18n" type="application/json">${i18n}</script>
+    <script src="${runtimeBase}/subscription_webapp_docs_demo.js" defer></script>
+  </body>
+</html>
+`;
+}
+
+await ensureFrontendDependencies();
+await runNpm(['--prefix', frontendRoot, 'run', 'build:docs-demo']);
+
+await rm(runtimeDir, { recursive: true, force: true });
+await mkdir(runtimeDir, { recursive: true });
+
+const html = await appHtml();
+
+await Promise.all([
+  copyRuntimeAsset('subscription_webapp_docs_demo.js'),
+  copyRuntimeAsset('subscription_webapp_docs_demo.css'),
+  copyRuntimeAsset('subscription_webapp_admin.js'),
+  copyRuntimeAsset('subscription_webapp_admin.css'),
+  copyDirectory(path.join(templatesDir, 'default-brand'), path.join(runtimeDir, 'default-brand')),
+  copyDirectory(themesDir, path.join(runtimeDir, 'themes'), copyThemeFile),
+  writeFile(path.join(runtimeDir, 'app.html'), html, 'utf8'),
+]);
+
+console.log(`Built static docs demo runtime at ${path.relative(repoRoot, runtimeDir)}`);
diff --git a/frontend/package.json b/frontend/package.json
index d411fc8..3a8ef78 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -3,7 +3,9 @@
   "scripts": {
     "build:webapp:svelte:main": "vite build --config ./vite.config.mjs",
     "build:webapp:svelte:admin": "vite build --config ./vite.config.mjs --mode admin",
+    "build:webapp:svelte:docs-demo": "vite build --config ./vite.config.mjs --mode docs-demo",
     "build:webapp:svelte": "npm run build:webapp:svelte:main && npm run build:webapp:svelte:admin",
+    "build:docs-demo": "npm run build:webapp:svelte:docs-demo && npm run build:webapp:svelte:admin",
     "build:webapp:css": "npm run build:webapp:svelte",
     "build:webapp:js": "node ./scripts/build_subscription_webapp_js.mjs",
     "build:webapp": "npm run build:webapp:svelte && npm run build:webapp:js",
diff --git a/frontend/src/docsDemoEntry.js b/frontend/src/docsDemoEntry.js
new file mode 100644
index 0000000..8bbb683
--- /dev/null
+++ b/frontend/src/docsDemoEntry.js
@@ -0,0 +1,58 @@
+import { mount } from "svelte";
+
+import App from "./App.svelte";
+import PreviewBoard from "./PreviewBoard.svelte";
+import { mockApi } from "./lib/webapp/mockApi.js";
+import { DEV_MOCK, applyPreviewMock } from "./lib/webapp/previewMock.js";
+import "./styles.css";
+
+const RUNTIME_BASE = "/demo/runtime";
+const DEFAULT_FAVICON_DIGEST = "19b2a242e5b7bc2d";
+
+function runtimePath(path) {
+  return `${RUNTIME_BASE}/${String(path || "").replace(/^\/+/, "")}`;
+}
+
+function copyThemeAssets(catalog) {
+  const themes = catalog?.themes || [];
+  for (const theme of themes) {
+    const cssFile = String(theme?.css_file || "").trim();
+    if (!theme?.key || !cssFile || cssFile.startsWith("/") || /^(?:https?:)?\/\//i.test(cssFile)) {
+      continue;
+    }
+    theme.css_file = runtimePath(`themes/${theme.key}/${cssFile}`);
+  }
+}
+
+function prepareMockConfig() {
+  const logoUrl = runtimePath("default-brand/default-logo.webp");
+  const faviconUrl = runtimePath(`default-brand/favicons/${DEFAULT_FAVICON_DIGEST}/icon-180.png`);
+  DEV_MOCK.config.logoUrl = logoUrl;
+  DEV_MOCK.config.faviconUrl = faviconUrl;
+  DEV_MOCK.config.adminJsAsset = runtimePath("subscription_webapp_admin.js");
+  DEV_MOCK.config.adminCssAsset = runtimePath("subscription_webapp_admin.css");
+  DEV_MOCK.config.apiBase = "/api";
+  copyThemeAssets(DEV_MOCK.config.themesCatalog);
+  copyThemeAssets(DEV_MOCK.data.themes_catalog);
+}
+
+const params = new URLSearchParams(window.location.search);
+applyPreviewMock(params.get("mock"));
+prepareMockConfig();
+
+const target = document.getElementById("app");
+if (target) {
+  target.replaceChildren();
+  mount(App, {
+    target,
+    props: {
+      mockRuntime: {
+        source: DEV_MOCK,
+        applyPreviewMock: () => {},
+        mockApi,
+        PreviewBoard,
+        docsDemo: true,
+      },
+    },
+  });
+}
diff --git a/frontend/vite.config.mjs b/frontend/vite.config.mjs
index c7324b3..fc73114 100644
--- a/frontend/vite.config.mjs
+++ b/frontend/vite.config.mjs
@@ -10,7 +10,17 @@ const templateDir = path.resolve(__dirname, "../backend/bot/app/web/templates");
 
 export default defineConfig(({ mode }) => {
   const isAdminBuild = mode === "admin";
-  const outputBase = isAdminBuild ? "subscription_webapp_admin" : "subscription_webapp";
+  const isDocsDemoBuild = mode === "docs-demo";
+  const outputBase = isAdminBuild
+    ? "subscription_webapp_admin"
+    : isDocsDemoBuild
+      ? "subscription_webapp_docs_demo"
+      : "subscription_webapp";
+  const entry = isAdminBuild
+    ? "src/adminEntry.js"
+    : isDocsDemoBuild
+      ? "src/docsDemoEntry.js"
+      : "src/main.js";
 
   return {
     resolve: {
@@ -32,7 +42,7 @@ export default defineConfig(({ mode }) => {
       sourcemap: false,
       cssCodeSplit: false,
       lib: {
-        entry: path.resolve(__dirname, isAdminBuild ? "src/adminEntry.js" : "src/main.js"),
+        entry: path.resolve(__dirname, entry),
         name: isAdminBuild ? "SubscriptionWebAppAdmin" : "SubscriptionWebApp",
         formats: ["iife"],
         fileName: () => `${outputBase}.js`,