diff --git a/client/src/components/HeroSection.tsx b/client/src/components/HeroSection.tsx
index a9a08a9..51fd0ee 100644
--- a/client/src/components/HeroSection.tsx
+++ b/client/src/components/HeroSection.tsx
@@ -1,10 +1,97 @@
-import { useEffect, useRef, useState } from "react";
-import { ArrowDown, ArrowUpRight, Check } from "lucide-react";
+import { CSSProperties, useEffect, useRef, useState } from "react";
+import { ArrowDown, ArrowUpRight, Check, Cog } from "lucide-react";
 import { trackCTAClick } from "@/lib/analytics";
 
+const backgrounds = ["geometry", "matrix", "gears"] as const;
+type Background = (typeof backgrounds)[number];
+
+const pickBackground = (): Background => {
+  const requested = new URLSearchParams(location.search).get("background");
+  if (backgrounds.includes(requested as Background)) return requested as Background;
+
+  try {
+    const previous = sessionStorage.getItem("primebuild-background");
+    const choices = backgrounds.filter((item) => item !== previous);
+    const selected = choices[Math.floor(Math.random() * choices.length)];
+    sessionStorage.setItem("primebuild-background", selected);
+    return selected;
+  } catch {
+    return backgrounds[Math.floor(Math.random() * backgrounds.length)];
+  }
+};
+
+const HeroBackground = ({ variant }: { variant: Background }) => {
+  if (variant === "matrix") {
+    return (
+      <div className="matrix-field absolute inset-0" aria-hidden="true">
+        <div className="matrix-reticle"><span /><span /><span /></div>
+        <div className="matrix-panel matrix-panel-a"><b>PRIME // CORE</b><span>BUILD STATUS: READY</span><span>THERMAL LINK: STABLE</span></div>
+        <div className="matrix-panel matrix-panel-b"><b>SYS.01</b><span>LATENCY 01.6MS</span><span>FRAME SYNC ACTIVE</span></div>
+        <div className="matrix-bracket matrix-bracket-left" />
+        <div className="matrix-bracket matrix-bracket-right" />
+        {Array.from({ length: 18 }, (_, index) => (
+          <span
+            key={index}
+            className="matrix-column"
+            style={{
+              left: `${1 + index * 5.7}%`,
+              animationDuration: `${8 + (index % 5) * 1.3}s`,
+              animationDelay: `${-index * 0.73}s`,
+            }}
+          >
+            {index % 3 === 0 ? "01001101011010010100110101101001" : "10110010100101100110100100110110"}
+          </span>
+        ))}
+      </div>
+    );
+  }
+
+  if (variant === "gears") {
+    const gears = [
+      ["5%", "10%", "17rem", "gear-clockwise"],
+      ["23%", "56%", "11rem", "gear-counter"],
+      ["56%", "5%", "23rem", "gear-counter"],
+      ["71%", "59%", "15rem", "gear-clockwise"],
+      ["87%", "27%", "9rem", "gear-counter"],
+      ["45%", "73%", "7rem", "gear-clockwise"],
+    ];
+    return (
+      <div className="gear-field absolute inset-0" aria-hidden="true">
+        <div className="hero-glow" />
+        <div className="gear-belt gear-belt-a" />
+        <div className="gear-belt gear-belt-b" />
+        <div className="gear-blueprint gear-blueprint-a">DRIVE TRAIN / 01</div>
+        <div className="gear-blueprint gear-blueprint-b">TORQUE SYNC / ACTIVE</div>
+        {gears.map(([left, top, size, animation], index) => (
+          <div
+            key={`${left}-${top}`}
+            className={`hero-gear ${animation}`}
+            style={{ left, top, width: size, height: size, animationDelay: `${-index * 1.7}s` } as CSSProperties}
+          >
+            <Cog className="gear-icon" strokeWidth={0.8} />
+            <span className="gear-inner" />
+            <span className="gear-hub" />
+          </div>
+        ))}
+      </div>
+    );
+  }
+
+  return (
+    <div className="hero-geometry absolute inset-0" aria-hidden="true">
+      <div className="hero-glow" />
+      <div className="hero-ring hero-ring-one" />
+      <div className="hero-ring hero-ring-two" />
+      <div className="hero-prism" />
+      <div className="hero-scan" />
+    </div>
+  );
+};
+
 const HeroSection = () => {
   const sectionRef = useRef<HTMLElement>(null);
   const [isVisible, setIsVisible] = useState(true);
+  const [background] = useState(pickBackground);
 
   useEffect(() => {
     const section = sectionRef.current;
@@ -15,60 +102,46 @@ const HeroSection = () => {
   }, []);
 
   return (
-  <section ref={sectionRef} id="home" className={`relative isolate flex min-h-[100svh] items-center overflow-hidden bg-[#050505] pt-24 ${isVisible ? "" : "motion-idle"}`}>
-    <div className="hero-geometry absolute inset-0" aria-hidden="true">
-      <div className="hero-glow" />
-      <div className="hero-ring hero-ring-one" />
-      <div className="hero-ring hero-ring-two" />
-      <div className="hero-prism" />
-      <div className="hero-scan" />
-    </div>
+    <section ref={sectionRef} id="home" className={`relative isolate flex min-h-[100svh] items-center overflow-hidden bg-[#050505] pt-24 ${isVisible ? "" : "motion-idle"}`}>
+      <HeroBackground variant={background} />
 
-    <div className="relative z-10 mx-auto w-full max-w-7xl px-5 py-20 text-center sm:px-8">
-      <p className="hero-enter mx-auto mb-7 flex max-w-full w-fit items-center justify-center gap-3 rounded-full border border-white/10 bg-black/30 px-4 py-2 text-center text-[0.65rem] font-semibold uppercase tracking-[0.18em] text-neutral-300 backdrop-blur-xl sm:text-[0.68rem] sm:tracking-[0.22em]">
-        <span className="h-1.5 w-1.5 shrink-0 rounded-full bg-primary shadow-[0_0_12px_hsl(var(--primary))]" />
-        Montegrotto Terme · 35036 (PD)
-      </p>
+      <div className="relative z-10 mx-auto w-full max-w-7xl px-5 py-20 text-center sm:px-8">
+        <p className="hero-enter mx-auto mb-7 flex max-w-full w-fit items-center justify-center gap-3 rounded-full border border-white/10 bg-black/30 px-4 py-2 text-center text-[0.65rem] font-semibold uppercase tracking-[0.18em] text-neutral-300 backdrop-blur-xl sm:text-[0.68rem] sm:tracking-[0.22em]">
+          <span className="h-1.5 w-1.5 shrink-0 rounded-full bg-primary shadow-[0_0_12px_hsl(var(--primary))]" />
+          Montegrotto Terme · 35036 (PD)
+        </p>
 
-      <h1 className="mx-auto font-montserrat font-semibold uppercase leading-[0.77] tracking-[-0.075em]" aria-label="Prime Build — PC gaming su misura">
-        <span className="brand-enter-left block text-[clamp(4.2rem,15vw,12.5rem)] text-white">
-          Prime
-        </span>
-        <span className="brand-enter-right block text-[clamp(4.2rem,15vw,12.5rem)] text-primary">
-          Build
-        </span>
-      </h1>
+        <h1 className="mx-auto font-montserrat font-semibold uppercase leading-[0.77] tracking-[-0.075em]" aria-label="Prime Build — PC gaming su misura">
+          <span className="brand-enter-left block text-[clamp(4.2rem,15vw,12.5rem)] text-white">Prime</span>
+          <span className="brand-enter-right block text-[clamp(4.2rem,15vw,12.5rem)] text-primary">Build</span>
+        </h1>
 
-      <div className="mx-auto mt-10 max-w-2xl">
-        <p className="text-base leading-relaxed text-neutral-300 sm:text-lg md:text-xl">
-          PC gaming progettati intorno a te. Consulenza reale, assemblaggio preciso e prestazioni ottimizzate senza sprechi.
-        </p>
-        <div className="mt-8 flex flex-col justify-center gap-3 sm:flex-row">
-          <a
-            href="#contact"
-            onClick={() => trackCTAClick("Configura il tuo PC", "hero")}
-            className="button-primary group"
-          >
-            Configura il tuo PC
-            <ArrowUpRight className="h-4 w-4 transition-transform group-hover:-translate-y-0.5 group-hover:translate-x-0.5" aria-hidden="true" />
-          </a>
-          <a href="#services" className="button-secondary">Scopri Prime Build</a>
+        <div className="mx-auto mt-10 max-w-2xl">
+          <p className="text-base leading-relaxed text-neutral-300 sm:text-lg md:text-xl">
+            PC gaming progettati intorno a te. Consulenza reale, assemblaggio preciso e prestazioni ottimizzate senza sprechi.
+          </p>
+          <div className="mt-8 flex flex-col justify-center gap-3 sm:flex-row">
+            <a href="#contact" onClick={() => trackCTAClick("Configura il tuo PC", "hero")} className="button-primary group">
+              Configura il tuo PC
+              <ArrowUpRight className="h-4 w-4 transition-transform group-hover:-translate-y-0.5 group-hover:translate-x-0.5" aria-hidden="true" />
+            </a>
+            <a href="#services" className="button-secondary">Scopri Prime Build</a>
+          </div>
         </div>
-      </div>
 
-      <div className="hero-enter hero-enter-delay mx-auto mt-10 flex max-w-3xl flex-wrap justify-center gap-x-7 gap-y-3 text-xs text-neutral-400 sm:text-sm">
-        {["Preventivo gratuito", "Componenti selezionati", "Supporto post-vendita"].map((item) => (
-          <span key={item} className="flex items-center gap-2">
-            <Check className="h-3.5 w-3.5 text-primary" aria-hidden="true" /> {item}
-          </span>
-        ))}
+        <div className="hero-enter hero-enter-delay mx-auto mt-10 flex max-w-3xl flex-wrap justify-center gap-x-7 gap-y-3 text-xs text-neutral-400 sm:text-sm">
+          {["Preventivo gratuito", "Componenti selezionati", "Supporto post-vendita"].map((item) => (
+            <span key={item} className="flex items-center gap-2">
+              <Check className="h-3.5 w-3.5 text-primary" aria-hidden="true" /> {item}
+            </span>
+          ))}
+        </div>
       </div>
-    </div>
 
-    <a href="#services" aria-label="Vai ai servizi" className="absolute bottom-5 left-1/2 z-10 hidden -translate-x-1/2 items-center gap-2 text-[0.65rem] uppercase tracking-[0.25em] text-neutral-500 transition hover:text-white sm:flex">
-      Esplora <ArrowDown className="h-4 w-4 animate-bounce" aria-hidden="true" />
-    </a>
-  </section>
+      <a href="#services" aria-label="Vai ai servizi" className="absolute bottom-5 left-1/2 z-10 hidden -translate-x-1/2 items-center gap-2 text-[0.65rem] uppercase tracking-[0.25em] text-neutral-500 transition hover:text-white sm:flex">
+        Esplora <ArrowDown className="h-4 w-4 animate-bounce" aria-hidden="true" />
+      </a>
+    </section>
   );
 };
 
diff --git a/client/src/index.css b/client/src/index.css
index a047e4a..36495f7 100644
--- a/client/src/index.css
+++ b/client/src/index.css
@@ -52,6 +52,9 @@
     html.motion-preview .hero-ring-two { animation-duration: 17s !important; animation-iteration-count: infinite !important; }
     html.motion-preview .hero-prism { animation-duration: 10s !important; animation-iteration-count: infinite !important; }
     html.motion-preview .hero-scan { animation-duration: 2.4s !important; animation-iteration-count: 1 !important; }
+    html.motion-preview .matrix-column { animation-duration: 12s !important; animation-iteration-count: infinite !important; }
+    html.motion-preview .gear-clockwise { animation-duration: 28s !important; animation-iteration-count: infinite !important; }
+    html.motion-preview .gear-counter { animation-duration: 34s !important; animation-iteration-count: infinite !important; }
     html.motion-preview .hero-enter { animation-duration: .6s !important; }
     html.motion-preview .brand-enter-left,
     html.motion-preview .brand-enter-right { animation-duration: .85s !important; }
@@ -120,6 +123,150 @@
     background: linear-gradient(315deg, hsl(var(--primary) / .55), rgba(255,255,255,.16));
     transform: rotate(-12deg);
   }
+  .matrix-field {
+    overflow: hidden;
+    background:
+      linear-gradient(rgba(255,102,0,.035) 1px, transparent 1px),
+      linear-gradient(90deg, rgba(255,102,0,.035) 1px, transparent 1px),
+      radial-gradient(circle at 50% 48%, #120b07, #050505 68%);
+    background-size: 64px 64px, 64px 64px, auto;
+    mask-image: linear-gradient(to bottom, #000 84%, transparent);
+  }
+  .matrix-column {
+    position: absolute;
+    top: -75%;
+    color: hsl(var(--primary) / .48);
+    font: 600 12px/1.55 ui-monospace, SFMono-Regular, Menlo, monospace;
+    letter-spacing: .12em;
+    text-orientation: upright;
+    text-shadow: 0 0 10px hsl(var(--primary) / .55);
+    writing-mode: vertical-rl;
+    animation-name: matrix-rain;
+    animation-timing-function: linear;
+    animation-iteration-count: infinite;
+    will-change: transform;
+  }
+  .matrix-column:nth-child(3n) { color: rgba(255,255,255,.36); font-size: 10px; }
+  .matrix-column:nth-child(even) { opacity: .56; }
+  .matrix-column:nth-child(5n) { font-size: 14px; opacity: .72; }
+  .matrix-reticle {
+    position: absolute;
+    left: 50%;
+    top: 50%;
+    width: min(54vw, 42rem);
+    aspect-ratio: 1;
+    translate: -50% -50%;
+    border: 1px solid hsl(var(--primary) / .15);
+    border-radius: 50%;
+    box-shadow: inset 0 0 70px hsl(var(--primary) / .04);
+  }
+  .matrix-reticle::before,
+  .matrix-reticle::after,
+  .matrix-reticle span {
+    content: "";
+    position: absolute;
+    border: 1px solid hsl(var(--primary) / .1);
+    border-radius: 50%;
+  }
+  .matrix-reticle::before { inset: 11%; border-style: dashed; }
+  .matrix-reticle::after { inset: 28%; }
+  .matrix-reticle span:nth-child(1) { inset: 4% 49%; border-radius: 0; }
+  .matrix-reticle span:nth-child(2) { inset: 49% 4%; border-radius: 0; }
+  .matrix-reticle span:nth-child(3) { inset: 38%; background: hsl(var(--primary) / .035); }
+  .matrix-panel {
+    position: absolute;
+    z-index: 1;
+    display: grid;
+    gap: .3rem;
+    min-width: 12rem;
+    padding: .75rem 1rem;
+    border: 1px solid hsl(var(--primary) / .16);
+    background: rgba(0,0,0,.28);
+    color: hsl(var(--primary) / .5);
+    font: 500 9px/1.35 ui-monospace, SFMono-Regular, Menlo, monospace;
+    letter-spacing: .13em;
+  }
+  .matrix-panel b { color: hsl(var(--primary) / .82); font-size: 10px; }
+  .matrix-panel-a { left: 5%; bottom: 15%; }
+  .matrix-panel-b { right: 5%; top: 16%; text-align: right; }
+  .matrix-bracket {
+    position: absolute;
+    top: 24%;
+    bottom: 22%;
+    width: 4rem;
+    border-block: 1px solid hsl(var(--primary) / .2);
+  }
+  .matrix-bracket-left { left: 12%; border-left: 1px solid hsl(var(--primary) / .2); }
+  .matrix-bracket-right { right: 12%; border-right: 1px solid hsl(var(--primary) / .2); }
+
+  .gear-field {
+    overflow: hidden;
+    background:
+      linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
+      linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px),
+      radial-gradient(circle at 50% 45%, #17100b, #050505 70%);
+    background-size: 72px 72px, 72px 72px, auto;
+    mask-image: linear-gradient(to bottom, #000 84%, transparent);
+  }
+  .hero-gear {
+    position: absolute;
+    color: hsl(var(--primary) / .28);
+    will-change: transform;
+  }
+  .hero-gear::before {
+    content: "";
+    position: absolute;
+    inset: 7%;
+    border: 1px dashed hsl(var(--primary) / .22);
+    border-radius: 50%;
+  }
+  .gear-icon { width: 100%; height: 100%; }
+  .gear-inner {
+    position: absolute;
+    inset: 31%;
+    border: 1px solid hsl(var(--primary) / .36);
+    border-radius: 50%;
+    box-shadow: inset 0 0 18px hsl(var(--primary) / .08);
+  }
+  .gear-hub {
+    position: absolute;
+    left: 50%;
+    top: 50%;
+    width: 8%;
+    aspect-ratio: 1;
+    translate: -50% -50%;
+    border-radius: 50%;
+    background: hsl(var(--primary) / .7);
+    box-shadow: 0 0 14px hsl(var(--primary) / .36);
+  }
+  .gear-belt {
+    position: absolute;
+    height: 12rem;
+    border-block: 1px dashed hsl(var(--primary) / .15);
+    transform-origin: left center;
+  }
+  .gear-belt-a { left: 14%; top: 28%; width: 54%; transform: rotate(14deg); }
+  .gear-belt-b { left: 52%; top: 55%; width: 38%; transform: rotate(-18deg); }
+  .gear-blueprint {
+    position: absolute;
+    padding-left: 2rem;
+    color: hsl(var(--primary) / .38);
+    font: 600 9px/1 ui-monospace, SFMono-Regular, Menlo, monospace;
+    letter-spacing: .2em;
+  }
+  .gear-blueprint::before { content: ""; position: absolute; left: 0; top: 50%; width: 1.4rem; border-top: 1px solid hsl(var(--primary) / .35); }
+  .gear-blueprint-a { left: 8%; bottom: 13%; }
+  .gear-blueprint-b { right: 7%; top: 17%; }
+  .gear-clockwise { animation: gear-clockwise 28s linear infinite; }
+  .gear-counter { animation: gear-counter 34s linear infinite; }
+
+  @media (max-width: 640px) {
+    .matrix-panel, .matrix-bracket, .gear-blueprint, .gear-belt { display: none; }
+    .matrix-reticle { width: 145vw; opacity: .55; }
+    .matrix-column:nth-child(even) { display: none; }
+    .hero-gear { opacity: .72; }
+  }
+
   .hero-glow {
     position: absolute;
     inset: 18% 22%;
@@ -229,6 +376,12 @@ html.motion-paused *::after,
   animation-play-state: paused !important;
 }
 
+@keyframes matrix-rain {
+  from { transform: translate3d(0, -10%, 0); }
+  to { transform: translate3d(0, 190vh, 0); }
+}
+@keyframes gear-clockwise { to { transform: rotate(360deg); } }
+@keyframes gear-counter { to { transform: rotate(-360deg); } }
 @keyframes enter-up { from { opacity: 0; transform: translateY(12px); } }
 @keyframes brand-left { from { transform: translateX(-18vw) scale(.88); letter-spacing: .02em; } }
 @keyframes brand-right { from { transform: translateX(18vw) scale(.88); letter-spacing: .02em; } }