diff --git a/src/components/common/SwSignature.tsx b/src/components/common/SwSignature.tsx
new file mode 100644
index 0000000..1c40f2d
--- /dev/null
+++ b/src/components/common/SwSignature.tsx
@@ -0,0 +1,30 @@
+/*
+ * Подпись студии StackWorks («штамп»): знак и две строки - «разработка и поддержка» / StackWorks.
+ * В остальных проектах она ставится скриптом https://stackworks.ru/sign/sw-sign.js,
+ * здесь - компонентом, чтобы React не спорил с чужими изменениями страницы.
+ * Оформление в src/index.css, классы swsig*.
+ */
+export default function SwSignature({ dark = false }: { dark?: boolean }) {
+  const bg = dark ? '#F3F1EB' : '#16171C';
+  const fg = dark ? '#16171C' : '#F3F1EB';
+  return (
+    <a
+      className={'swsig' + (dark ? ' swsig-dark' : '')}
+      href="https://stackworks.ru/?utm_source=mail.stackworks.ru&utm_medium=signature"
+      target="_blank"
+      rel="noopener"
+      aria-label="Разработка и поддержка - StackWorks"
+    >
+      <svg viewBox="0 0 100 100" aria-hidden="true">
+        <rect x="2" y="2" width="96" height="96" rx="25" fill={bg} />
+        <rect className="b b1" x="20" y="29" width="44" height="12" rx="6" fill={fg} />
+        <rect className="b b2" x="30" y="45" width="50" height="12" rx="6" fill="#FF4A1C" />
+        <rect className="b b3" x="40" y="61" width="34" height="12" rx="6" fill={fg} />
+      </svg>
+      <span className="swsig-txt">
+        <span className="swsig-cap">разработка и поддержка</span>
+        <span className="swsig-word">Stack<i>Works</i></span>
+      </span>
+    </a>
+  );
+}
diff --git a/src/components/layout/Sidebar.tsx b/src/components/layout/Sidebar.tsx
index 24dc957..1bedc2b 100644
--- a/src/components/layout/Sidebar.tsx
+++ b/src/components/layout/Sidebar.tsx
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-SEL
  */
 
+import SwSignature from '@/components/common/SwSignature';
 import { useCallback, useEffect, useMemo, useRef, useState } from 'react';
 import { useLocation, useNavigate } from 'react-router-dom';
 import * as LucideIcons from 'lucide-react';
@@ -365,6 +366,10 @@ export function Sidebar() {
           </nav>
         </div>
 
+        <div className="flex justify-center px-3 py-3">
+          <SwSignature dark />
+        </div>
+
         {layouts.length > 1 && (
           <TooltipProvider>
             <div className="sw-aside-foot flex items-center justify-around border-t bg-background px-2 py-2">
diff --git a/src/index.css b/src/index.css
index 53c84a2..8503b92 100644
--- a/src/index.css
+++ b/src/index.css
@@ -165,3 +165,20 @@ aside.sw-aside .text-muted-foreground { color: #8d8f96 !important; }
 @media (max-width: 640px) {
   main h1 { font-size: 1.6rem; }
 }
+
+/* подпись студии (компонент SwSignature, повторяет https://stackworks.ru/sign/sw-sign.js) */
+.swsig { --ink: #16171c; --cap: #6a6c75; --acc: #ff4a1c; display: inline-flex; align-items: center; gap: 10px;
+  min-height: 44px; text-decoration: none; color: var(--ink); border-radius: 8px; }
+.swsig-dark { --ink: #f3f1eb; --cap: #9a9ca3; }
+.swsig svg { width: 30px; height: 30px; flex: 0 0 auto; display: block; }
+.swsig-txt { display: flex; flex-direction: column; gap: 4px; }
+.swsig-cap { font: 400 11.5px/1 'SW Inter', system-ui, sans-serif; color: var(--cap); white-space: nowrap; }
+.swsig-word { font: 700 16px/1 'SW Rubik', sans-serif; letter-spacing: -.01em; color: var(--ink); white-space: nowrap; }
+.swsig-word i { font-style: normal; color: var(--acc); }
+@keyframes swsig-shuffle { 0%, 100% { transform: translateX(0); } 45% { transform: translateX(9px); } }
+.swsig .b { transform-box: fill-box; }
+.swsig:hover .b, .swsig:focus-visible .b { animation: swsig-shuffle .38s ease-in-out both; }
+.swsig:hover .b2, .swsig:focus-visible .b2 { animation-delay: .07s; }
+.swsig:hover .b3, .swsig:focus-visible .b3 { animation-delay: .14s; }
+.swsig:focus-visible { outline: 2px solid var(--acc); outline-offset: 4px; }
+@media (prefers-reduced-motion: reduce) { .swsig .b { animation: none !important; } }
diff --git a/src/pages/LoginPage.tsx b/src/pages/LoginPage.tsx
index 56c891e..3178945 100644
--- a/src/pages/LoginPage.tsx
+++ b/src/pages/LoginPage.tsx
@@ -10,6 +10,7 @@ import { useTranslation } from 'react-i18next';
 import { ArrowRight, Loader2 } from 'lucide-react';
 
 import Logo from '@/components/common/Logo';
+import SwSignature from '@/components/common/SwSignature';
 import { useDocumentTitle } from '@/hooks/useDocumentTitle';
 import { Button } from '@/components/ui/button';
 import { Input } from '@/components/ui/input';
@@ -43,7 +44,7 @@ export default function LoginPage() {
   }
 
   return (
-    <div className="flex min-h-screen items-center justify-center bg-content-background px-4">
+    <div className="flex min-h-screen flex-col items-center justify-center gap-6 bg-content-background px-4">
       <Card className="w-full max-w-sm shadow-sm">
         <CardHeader className="items-center text-center">
           <Logo />
@@ -87,6 +88,7 @@ export default function LoginPage() {
           </form>
         </CardContent>
       </Card>
+      <SwSignature />
     </div>
   );
 }