diff --git a/frontend/src/app/app.component.ts b/frontend/src/app/app.component.ts
index cb93b2a..53a2fdb 100644
--- a/frontend/src/app/app.component.ts
+++ b/frontend/src/app/app.component.ts
@@ -1,5 +1,6 @@
-import { Component } from '@angular/core';
+import { Component, inject } from '@angular/core';
 import { RouterOutlet } from '@angular/router';
+import { SeoService } from './core/services/seo.service';
 
 @Component({
   selector: 'app-root',
@@ -8,4 +9,6 @@ import { RouterOutlet } from '@angular/router';
   templateUrl: './app.component.html',
   styleUrl: './app.component.scss',
 })
-export class AppComponent {}
+export class AppComponent {
+  private readonly seoService = inject(SeoService);
+}
diff --git a/frontend/src/app/app.routes.ts b/frontend/src/app/app.routes.ts
index 2b5024f..c423e3b 100644
--- a/frontend/src/app/app.routes.ts
+++ b/frontend/src/app/app.routes.ts
@@ -5,6 +5,11 @@ const appChildRoutes: Routes = [
     path: '',
     loadComponent: () =>
       import('./features/home/home.component').then((m) => m.HomeComponent),
+    data: {
+      seoTitle: '3D fab | Stampa 3D su misura',
+      seoDescription:
+        'Servizio di stampa 3D con preventivo online immediato per prototipi, piccole serie e pezzi personalizzati.',
+    },
   },
   {
     path: 'calculator',
@@ -12,21 +17,42 @@ const appChildRoutes: Routes = [
       import('./features/calculator/calculator.routes').then(
         (m) => m.CALCULATOR_ROUTES,
       ),
+    data: {
+      seoTitle: 'Calcolatore preventivo stampa 3D | 3D fab',
+      seoDescription:
+        'Carica il file 3D e ottieni prezzo e tempi in pochi secondi con slicing reale.',
+    },
   },
   {
     path: 'shop',
     loadChildren: () =>
       import('./features/shop/shop.routes').then((m) => m.SHOP_ROUTES),
+    data: {
+      seoTitle: 'Shop 3D fab',
+      seoDescription:
+        'Catalogo prodotti stampati in 3D e soluzioni tecniche pronte all uso.',
+      seoRobots: 'noindex, nofollow',
+    },
   },
   {
     path: 'about',
     loadChildren: () =>
       import('./features/about/about.routes').then((m) => m.ABOUT_ROUTES),
+    data: {
+      seoTitle: 'Chi siamo | 3D fab',
+      seoDescription:
+        'Scopri il team 3D fab e il laboratorio di stampa 3D con sedi in Ticino e Bienne.',
+    },
   },
   {
     path: 'contact',
     loadChildren: () =>
       import('./features/contact/contact.routes').then((m) => m.CONTACT_ROUTES),
+    data: {
+      seoTitle: 'Contatti | 3D fab',
+      seoDescription:
+        'Contatta 3D fab per preventivi, supporto tecnico e richieste personalizzate di stampa 3D.',
+    },
   },
   {
     path: 'checkout/cad',
@@ -34,6 +60,10 @@ const appChildRoutes: Routes = [
       import('./features/checkout/checkout.component').then(
         (m) => m.CheckoutComponent,
       ),
+    data: {
+      seoTitle: 'Checkout | 3D fab',
+      seoRobots: 'noindex, nofollow',
+    },
   },
   {
     path: 'checkout',
@@ -41,16 +71,28 @@ const appChildRoutes: Routes = [
       import('./features/checkout/checkout.component').then(
         (m) => m.CheckoutComponent,
       ),
+    data: {
+      seoTitle: 'Checkout | 3D fab',
+      seoRobots: 'noindex, nofollow',
+    },
   },
   {
     path: 'order/:orderId',
     loadComponent: () =>
       import('./features/order/order.component').then((m) => m.OrderComponent),
+    data: {
+      seoTitle: 'Ordine | 3D fab',
+      seoRobots: 'noindex, nofollow',
+    },
   },
   {
     path: 'co/:orderId',
     loadComponent: () =>
       import('./features/order/order.component').then((m) => m.OrderComponent),
+    data: {
+      seoTitle: 'Ordine | 3D fab',
+      seoRobots: 'noindex, nofollow',
+    },
   },
   {
     path: '',
@@ -61,6 +103,10 @@ const appChildRoutes: Routes = [
     path: 'admin',
     loadChildren: () =>
       import('./features/admin/admin.routes').then((m) => m.ADMIN_ROUTES),
+    data: {
+      seoTitle: 'Admin | 3D fab',
+      seoRobots: 'noindex, nofollow',
+    },
   },
   {
     path: '**',
diff --git a/frontend/src/app/features/about/about.routes.ts b/frontend/src/app/features/about/about.routes.ts
index 0128c8e..3d7d210 100644
--- a/frontend/src/app/features/about/about.routes.ts
+++ b/frontend/src/app/features/about/about.routes.ts
@@ -2,5 +2,13 @@ import { Routes } from '@angular/router';
 import { AboutPageComponent } from './about-page.component';
 
 export const ABOUT_ROUTES: Routes = [
-  { path: '', component: AboutPageComponent },
+  {
+    path: '',
+    component: AboutPageComponent,
+    data: {
+      seoTitle: 'Chi siamo | 3D fab',
+      seoDescription:
+        'Siamo un laboratorio di stampa 3D orientato a prototipi, ricambi e produzioni su misura.',
+    },
+  },
 ];
diff --git a/frontend/src/app/features/calculator/calculator.routes.ts b/frontend/src/app/features/calculator/calculator.routes.ts
index 5a670cd..134457b 100644
--- a/frontend/src/app/features/calculator/calculator.routes.ts
+++ b/frontend/src/app/features/calculator/calculator.routes.ts
@@ -3,10 +3,24 @@ import { CalculatorPageComponent } from './calculator-page.component';
 
 export const CALCULATOR_ROUTES: Routes = [
   { path: '', redirectTo: 'basic', pathMatch: 'full' },
-  { path: 'basic', component: CalculatorPageComponent, data: { mode: 'easy' } },
+  {
+    path: 'basic',
+    component: CalculatorPageComponent,
+    data: {
+      mode: 'easy',
+      seoTitle: 'Calcolatore stampa 3D base | 3D fab',
+      seoDescription:
+        'Calcola rapidamente il prezzo della tua stampa 3D in modalita base.',
+    },
+  },
   {
     path: 'advanced',
     component: CalculatorPageComponent,
-    data: { mode: 'advanced' },
+    data: {
+      mode: 'advanced',
+      seoTitle: 'Calcolatore stampa 3D avanzato | 3D fab',
+      seoDescription:
+        'Configura parametri avanzati e ottieni un preventivo preciso con slicing reale.',
+    },
   },
 ];
diff --git a/frontend/src/app/features/calculator/components/quote-result/quote-result.component.html b/frontend/src/app/features/calculator/components/quote-result/quote-result.component.html
index d7141b7..2c81b84 100644
--- a/frontend/src/app/features/calculator/components/quote-result/quote-result.component.html
+++ b/frontend/src/app/features/calculator/components/quote-result/quote-result.component.html
@@ -45,6 +45,12 @@
       <p>{{ result().notes }}</p>
     </div>
   }
+  @if (recalculationRequired()) {
+    <div class="recalc-banner">
+      Hai modificato i parametri di stampa. Ricalcola il preventivo prima di
+      procedere con l'ordine.
+    </div>
+  }
 
   <div class="divider"></div>
 
@@ -104,7 +110,10 @@
 
     <div class="actions-right">
       @if (!hasQuantityOverLimit()) {
-        <app-button (click)="proceed.emit()">
+        <app-button
+          [disabled]="recalculationRequired()"
+          (click)="proceed.emit()"
+        >
           {{ "QUOTE.PROCEED_ORDER" | translate }}
         </app-button>
       } @else {
@@ -112,6 +121,11 @@
           "QUOTE.MAX_QTY_NOTICE" | translate: { max: directOrderLimit }
         }}</small>
       }
+      @if (recalculationRequired()) {
+        <small class="limit-note">
+          Ricalcola il preventivo per riattivare il checkout.
+        </small>
+      }
     </div>
   </div>
 </app-card>
diff --git a/frontend/src/app/features/calculator/components/quote-result/quote-result.component.scss b/frontend/src/app/features/calculator/components/quote-result/quote-result.component.scss
index 38913fa..b4e94b2 100644
--- a/frontend/src/app/features/calculator/components/quote-result/quote-result.component.scss
+++ b/frontend/src/app/features/calculator/components/quote-result/quote-result.component.scss
@@ -184,3 +184,14 @@
     white-space: pre-wrap; /* Preserve line breaks */
   }
 }
+
+.recalc-banner {
+  margin-top: var(--space-4);
+  margin-bottom: var(--space-4);
+  padding: var(--space-3);
+  border: 1px solid #f0c95a;
+  background: #fff8e1;
+  border-radius: var(--radius-md);
+  color: #6f5b1a;
+  font-size: 0.9rem;
+}
diff --git a/frontend/src/app/features/calculator/components/quote-result/quote-result.component.ts b/frontend/src/app/features/calculator/components/quote-result/quote-result.component.ts
index 5da71ec..ce0df34 100644
--- a/frontend/src/app/features/calculator/components/quote-result/quote-result.component.ts
+++ b/frontend/src/app/features/calculator/components/quote-result/quote-result.component.ts
@@ -35,6 +35,7 @@ export class QuoteResultComponent implements OnDestroy {
   readonly quantityAutoRefreshMs = 2000;
 
   result = input.required<QuoteResult>();
+  recalculationRequired = input<boolean>(false);
   consult = output<void>();
   proceed = output<void>();
   itemChange = output<{
@@ -43,6 +44,12 @@ export class QuoteResultComponent implements OnDestroy {
     fileName: string;
     quantity: number;
   }>();
+  itemQuantityPreviewChange = output<{
+    id?: string;
+    index: number;
+    fileName: string;
+    quantity: number;
+  }>();
 
   // Local mutable state for items to handle quantity changes
   items = signal<QuoteItem[]>([]);
@@ -87,6 +94,13 @@ export class QuoteResultComponent implements OnDestroy {
       return updated;
     });
 
+    this.itemQuantityPreviewChange.emit({
+      id: item.id,
+      index,
+      fileName: item.fileName,
+      quantity: normalizedQty,
+    });
+
     this.scheduleQuantityRefresh(index, key);
   }
 
diff --git a/frontend/src/app/features/contact/contact.routes.ts b/frontend/src/app/features/contact/contact.routes.ts
index f8ef5c5..6ee01b5 100644
--- a/frontend/src/app/features/contact/contact.routes.ts
+++ b/frontend/src/app/features/contact/contact.routes.ts
@@ -5,5 +5,10 @@ export const CONTACT_ROUTES: Routes = [
     path: '',
     loadComponent: () =>
       import('./contact-page.component').then((m) => m.ContactPageComponent),
+    data: {
+      seoTitle: 'Contatti | 3D fab',
+      seoDescription:
+        'Richiedi informazioni, preventivi personalizzati o supporto per progetti di stampa 3D.',
+    },
   },
 ];
diff --git a/frontend/src/app/features/home/home.component.html b/frontend/src/app/features/home/home.component.html
index 2255de4..6299a99 100644
--- a/frontend/src/app/features/home/home.component.html
+++ b/frontend/src/app/features/home/home.component.html
@@ -37,28 +37,31 @@
       <div class="cap-cards">
         <app-card>
           <div class="card-image-placeholder">
-            <img src="assets/images/home/prototipi.jpg" alt="" />
+            <img src="assets/images/home/prototipi.jpg" alt="Prototipazione 3D" />
           </div>
           <h3>{{ "HOME.CAP_1_TITLE" | translate }}</h3>
           <p class="text-muted">{{ "HOME.CAP_1_TEXT" | translate }}</p>
         </app-card>
         <app-card>
           <div class="card-image-placeholder">
-            <img src="assets/images/home/original-vs-3dprinted.jpg" alt="" />
+            <img
+              src="assets/images/home/original-vs-3dprinted.jpg"
+              alt="Confronto pezzo originale e stampato in 3D"
+            />
           </div>
           <h3>{{ "HOME.CAP_2_TITLE" | translate }}</h3>
           <p class="text-muted">{{ "HOME.CAP_2_TEXT" | translate }}</p>
         </app-card>
         <app-card>
           <div class="card-image-placeholder">
-            <img src="assets/images/home/serie.jpg" alt="" />
+            <img src="assets/images/home/serie.jpg" alt="Piccole serie stampate in 3D" />
           </div>
           <h3>{{ "HOME.CAP_3_TITLE" | translate }}</h3>
           <p class="text-muted">{{ "HOME.CAP_3_TEXT" | translate }}</p>
         </app-card>
         <app-card>
           <div class="card-image-placeholder">
-            <img src="assets/images/home/cad.jpg" alt="" />
+            <img src="assets/images/home/cad.jpg" alt="Servizio CAD per stampa 3D" />
           </div>
           <h3>{{ "HOME.CAP_4_TITLE" | translate }}</h3>
           <p class="text-muted">{{ "HOME.CAP_4_TEXT" | translate }}</p>
diff --git a/frontend/src/app/features/legal/legal.routes.ts b/frontend/src/app/features/legal/legal.routes.ts
index 78cc23e..274bfd7 100644
--- a/frontend/src/app/features/legal/legal.routes.ts
+++ b/frontend/src/app/features/legal/legal.routes.ts
@@ -5,10 +5,20 @@ export const LEGAL_ROUTES: Routes = [
     path: 'privacy',
     loadComponent: () =>
       import('./privacy/privacy.component').then((m) => m.PrivacyComponent),
+    data: {
+      seoTitle: 'Privacy Policy | 3D fab',
+      seoDescription:
+        'Informativa privacy di 3D fab: trattamento dati, finalita e contatti.',
+    },
   },
   {
     path: 'terms',
     loadComponent: () =>
       import('./terms/terms.component').then((m) => m.TermsComponent),
+    data: {
+      seoTitle: 'Termini e condizioni | 3D fab',
+      seoDescription:
+        'Termini e condizioni del servizio di stampa 3D e del calcolatore preventivi.',
+    },
   },
 ];
diff --git a/frontend/src/app/features/shop/shop.routes.ts b/frontend/src/app/features/shop/shop.routes.ts
index 22a7fb3..b94949b 100644
--- a/frontend/src/app/features/shop/shop.routes.ts
+++ b/frontend/src/app/features/shop/shop.routes.ts
@@ -3,6 +3,22 @@ import { ShopPageComponent } from './shop-page.component';
 import { ProductDetailComponent } from './product-detail.component';
 
 export const SHOP_ROUTES: Routes = [
-  { path: '', component: ShopPageComponent },
-  { path: ':id', component: ProductDetailComponent },
+  {
+    path: '',
+    component: ShopPageComponent,
+    data: {
+      seoTitle: 'Shop 3D fab',
+      seoDescription:
+        'Lo shop 3D fab e in allestimento. Intanto puoi usare il calcolatore per ottenere un preventivo.',
+      seoRobots: 'noindex, nofollow',
+    },
+  },
+  {
+    path: ':id',
+    component: ProductDetailComponent,
+    data: {
+      seoTitle: 'Prodotto | 3D fab',
+      seoRobots: 'noindex, nofollow',
+    },
+  },
 ];
diff --git a/frontend/src/index.html b/frontend/src/index.html
index 91a4429..140c33c 100644
--- a/frontend/src/index.html
+++ b/frontend/src/index.html
@@ -2,8 +2,12 @@
 <html lang="it">
   <head>
     <meta charset="utf-8" />
-    <meta name="robots" content="noindex, nofollow" />
-    <title>3D fab</title>
+    <title>3D fab | Stampa 3D su misura</title>
+    <meta
+      name="description"
+      content="Stampa 3D su misura con preventivo online immediato. Carica il file, scegli materiale e qualità, ricevi prezzo e tempi in pochi secondi."
+    />
+    <meta name="robots" content="index, follow" />
     <base href="/" />
     <meta name="viewport" content="width=device-width, initial-scale=1" />
     <link rel="icon" type="image/png" href="assets/images/Fav-icon.png" />