feat(web): add enhanced grid

frontend/src/app/features/home/home.component.ts

@@ -33,13 +33,6 @@ import { AppCardComponent } from '../../shared/components/app-card/app-card.comp
               <span>Progettazione CAD e post-processing su richiesta</span>
             </div>
           </div>
-
-          <div class="hero-panel">
-            <!-- Video background placeholder -->
-            <div class="video-placeholder">
-               <!-- Future video implementation -->
-            </div>
-          </div>
         </div>
       </section>
 
@@ -191,6 +184,8 @@ import { AppCardComponent } from '../../shared/components/app-card/app-card.comp
     </main>
   `,
   styles: [`
+    @use '../../../styles/patterns';
+
     .home-page {
       background: var(--color-bg);
     }
@@ -200,7 +195,20 @@ import { AppCardComponent } from '../../shared/components/app-card/app-card.comp
       padding: 6rem 0 5rem;
       overflow: hidden;
       background: var(--color-bg);
+      // Enhanced Grid Pattern
+      &::after {
+        content: '';
+        position: absolute;
+        inset: 0;
+        @include patterns.pattern-grid(var(--color-neutral-900), 40px, 1px);
+        opacity: 0.12;
+        z-index: 0;
+        pointer-events: none;
+        mask-image: linear-gradient(to bottom, black 40%, transparent 100%);
+      }
     }
+    
+    // Keep the accent blob
     .hero::before {
       content: '';
       position: absolute;
@@ -213,18 +221,7 @@ import { AppCardComponent } from '../../shared/components/app-card/app-card.comp
       z-index: 0;
       animation: floatGlow 12s ease-in-out infinite;
     }
-    .hero::after {
-      content: '';
-      position: absolute;
-      inset: 0;
-      background-image:
-        linear-gradient(rgba(16, 24, 32, 0.05) 1px, transparent 1px),
-        linear-gradient(90deg, rgba(16, 24, 32, 0.05) 1px, transparent 1px);
-      background-size: 32px 32px;
-      opacity: 0.25;
-      z-index: 0;
-      pointer-events: none;
-    }
+    
     .hero-grid {
       display: grid;
       gap: var(--space-12);
@@ -374,11 +371,23 @@ import { AppCardComponent } from '../../shared/components/app-card/app-card.comp
       background: var(--color-neutral-50);
       border-top: 1px solid var(--color-border);
       border-bottom: 1px solid var(--color-border);
+      position: relative;
+      // Honeycomb/Gyroid Pattern
+      &::before {
+        content: '';
+        position: absolute;
+        inset: 0;
+        @include patterns.pattern-gyroid(var(--color-neutral-900), 60px);
+        opacity: 0.03;
+        pointer-events: none;
+      }
     }
     .calculator-grid {
       display: grid;
       gap: var(--space-10);
       align-items: center;
+      position: relative; 
+      z-index: 1;
     }
     .calculator-list {
       padding-left: var(--space-4);
@@ -393,11 +402,23 @@ import { AppCardComponent } from '../../shared/components/app-card/app-card.comp
 
     .shop {
       background: var(--color-neutral-50);
+      position: relative;
+      // Triangular/Isogrid Pattern
+      &::before {
+        content: '';
+        position: absolute;
+        inset: 0;
+        @include patterns.pattern-triangular(var(--color-neutral-900), 40px);
+        opacity: 0.03;
+        pointer-events: none;
+      }
     }
     .split {
       display: grid;
       gap: var(--space-10);
       align-items: center;
+      position: relative;
+      z-index: 1;
     }
     .shop-list {
       padding-left: var(--space-4);

frontend/src/styles.scss

@@ -1,5 +1,6 @@
 /* src/styles.scss */
 @use './styles/theme';
+@use './styles/patterns';
 
 /* Reset / Base */
 *, *::before, *::after {

frontend/src/styles/_patterns.scss

@@ -0,0 +1,53 @@
+@use 'sass:math';
+
+// =============================================================================
+// 3D Print Infill Patterns
+// =============================================================================
+
+// 1. Grid (Rectilinear Infill)
+// Basic square grid, standard infill.
+@mixin pattern-grid($color, $size: 40px, $weight: 1px) {
+  background-image:
+    linear-gradient($color $weight, transparent $weight),
+    linear-gradient(90deg, $color $weight, transparent $weight);
+  background-size: $size $size;
+}
+
+// 2. Triangular (Isogrid / Triangle Infill)
+// Strong aesthetic, often used for structural parts.
+@mixin pattern-triangular($color, $size: 40px, $weight: 1px) {
+  background-image:
+    linear-gradient(30deg, $color 1px, transparent 1px),
+    linear-gradient(150deg, $color 1px, transparent 1px),
+    linear-gradient(90deg, $color 1px, transparent 1px);
+  background-size: $size $size;
+  // Note: Simplification of true isogrid for CSS stability
+}
+
+// 3. Hexagonal (Honeycomb Infill)
+// Best structural integrity to weight ratio.
+@mixin pattern-honeycomb($color, $size: 32px) {
+  background-image:
+    radial-gradient(circle, transparent 65%, $color 66%, $color 70%, transparent 71%);
+  background-size: $size $size;
+  // This creates a "Dot/Ring" pattern that resembles printed layers or nozzle paths
+  // A true CSS honeycomb is complex and brittle across browsers.
+  // Using this "Nozzle Path" aesthetic instead which feels organic.
+}
+
+// 4. Diagonal (Rectilinear 45deg)
+@mixin pattern-diagonal($color, $size: 20px, $weight: 1px) {
+  background-image:
+    repeating-linear-gradient(45deg, $color 0, $color $weight, transparent $weight, transparent 50%),
+    repeating-linear-gradient(-45deg, $color 0, $color $weight, transparent $weight, transparent 50%);
+  background-size: $size $size;
+}
+
+// 5. Gyroid (Approximation via Curves)
+// Using radial gradients to simulate organic curves
+@mixin pattern-gyroid($color, $size: 40px) {
+    background-image: 
+        radial-gradient(circle at 0 0, transparent 47%, $color 48%, $color 50%, transparent 51%), 
+        radial-gradient(circle at 100% 100%, transparent 47%, $color 48%, $color 50%, transparent 51%);
+    background-size: $size $size;
+}