diff --git a/index.html b/index.html
index 14bf9b9..668897f 100644
--- a/index.html
+++ b/index.html
@@ -4,16 +4,12 @@
     <meta charset="UTF-8" />
     <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <meta name="color-scheme" content="light dark" />
+    <meta name="color-scheme" content="dark" />
     <title>Academy Aziendale</title>
     <script>
       (function () {
         try {
-          var theme = localStorage.getItem("academy-theme");
-          var prefersDark = window.matchMedia("(prefers-color-scheme: dark)").matches;
-          if (theme === "dark" || (theme !== "light" && theme !== "dark" && prefersDark)) {
-            document.documentElement.classList.add("dark");
-          }
+          document.documentElement.classList.add("dark");
         } catch (e) {}
       })();
     </script>
diff --git a/src/App.tsx b/src/App.tsx
index 43852b0..d657438 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -23,7 +23,7 @@ import Statistiche from "@/pages/Statistiche";
 
 export default function App() {
   return (
-    <ThemeProvider attribute="class" defaultTheme="system" enableSystem storageKey="academy-theme">
+    <ThemeProvider attribute="class" forcedTheme="dark" enableSystem={false}>
       <AuthProvider>
         <BrowserRouter>
         <Routes>
diff --git a/src/components/AppSidebar.tsx b/src/components/AppSidebar.tsx
index b3e06ad..fb513f0 100644
--- a/src/components/AppSidebar.tsx
+++ b/src/components/AppSidebar.tsx
@@ -7,7 +7,6 @@
 
 import { NavLink, useNavigate } from "react-router-dom";
 import { LogOut } from "lucide-react";
-import ThemeToggle from "@/components/ThemeToggle";
 import { getNavItemsForRole } from "@/config/navigation";
 import { Button } from "@/components/ui/button";
 import { Badge } from "@/components/ui/badge";
@@ -35,13 +34,8 @@ export default function AppSidebar({ onNavigate }: AppSidebarProps) {
   return (
     <aside className="flex min-h-svh w-64 shrink-0 flex-col border-r border-sidebar-border bg-sidebar text-sidebar-foreground">
       <div className="border-b px-4 py-4">
-        <div className="flex items-start justify-between gap-2">
-          <div>
-            <p className="text-sm font-semibold">Academy Aziendale</p>
-            <p className="text-xs text-muted-foreground">Gestione formazione</p>
-          </div>
-          <ThemeToggle compact />
-        </div>
+        <p className="text-sm font-semibold">Academy Aziendale</p>
+        <p className="text-xs text-muted-foreground">Gestione formazione</p>
       </div>
 
       <nav className="flex flex-1 flex-col gap-1 p-3">
diff --git a/src/components/ThemeProvider.tsx b/src/components/ThemeProvider.tsx
index 97d9288..8c15277 100644
--- a/src/components/ThemeProvider.tsx
+++ b/src/components/ThemeProvider.tsx
@@ -1,3 +1,9 @@
+//===============================================
+// File: ThemeProvider.tsx
+// Componente wrapper per il tema scuro fisso (Night Mode)
+// @author: "villari.andrea@libero.it"
+// @version: "1.0.0 2026-07-14"
+//===============================================
 import type { ComponentProps } from "react";
 import { ThemeProvider as NextThemesProvider } from "next-themes";
 
diff --git a/src/components/ThemeToggle.tsx b/src/components/ThemeToggle.tsx
deleted file mode 100644
index faa8262..0000000
--- a/src/components/ThemeToggle.tsx
+++ /dev/null
@@ -1,75 +0,0 @@
-import { useEffect, useState } from "react";
-import { Monitor, Moon, Sun } from "lucide-react";
-import { useTheme } from "next-themes";
-import { Button } from "@/components/ui/button";
-import {
-  DropdownMenu,
-  DropdownMenuContent,
-  DropdownMenuItem,
-  DropdownMenuTrigger,
-} from "@/components/ui/dropdown-menu";
-
-interface ThemeToggleProps {
-  className?: string;
-  compact?: boolean;
-}
-
-export default function ThemeToggle({ className, compact = false }: ThemeToggleProps) {
-  const { theme, setTheme, resolvedTheme } = useTheme();
-  const [mounted, setMounted] = useState(false);
-
-  useEffect(() => setMounted(true), []);
-
-  if (!mounted) {
-    return (
-      <Button
-        variant="outline"
-        size={compact ? "icon-sm" : "sm"}
-        className={className}
-        disabled
-        aria-hidden
-      />
-    );
-  }
-
-  const icon =
-    theme === "system" ? (
-      <Monitor className="size-4" />
-    ) : resolvedTheme === "dark" ? (
-      <Moon className="size-4" />
-    ) : (
-      <Sun className="size-4" />
-    );
-
-  return (
-    <DropdownMenu>
-      <DropdownMenuTrigger
-        render={
-          <Button
-            variant="outline"
-            size={compact ? "icon-sm" : "sm"}
-            className={className}
-            aria-label="Cambia tema"
-          />
-        }
-      >
-        {icon}
-        {!compact && <span className="sr-only">Cambia tema</span>}
-      </DropdownMenuTrigger>
-      <DropdownMenuContent align="end">
-        <DropdownMenuItem onClick={() => setTheme("light")}>
-          <Sun className="size-4" />
-          Chiaro
-        </DropdownMenuItem>
-        <DropdownMenuItem onClick={() => setTheme("dark")}>
-          <Moon className="size-4" />
-          Scuro
-        </DropdownMenuItem>
-        <DropdownMenuItem onClick={() => setTheme("system")}>
-          <Monitor className="size-4" />
-          Sistema
-        </DropdownMenuItem>
-      </DropdownMenuContent>
-    </DropdownMenu>
-  );
-}
diff --git a/src/components/ui/sonner.tsx b/src/components/ui/sonner.tsx
index 9772eb2..30b5a7c 100644
--- a/src/components/ui/sonner.tsx
+++ b/src/components/ui/sonner.tsx
@@ -1,13 +1,10 @@
-import { useTheme } from "next-themes"
 import { Toaster as Sonner, type ToasterProps } from "sonner"
 import { CircleCheckIcon, InfoIcon, TriangleAlertIcon, OctagonXIcon, Loader2Icon } from "lucide-react"
 
 const Toaster = ({ ...props }: ToasterProps) => {
-  const { theme = "system" } = useTheme()
-
   return (
     <Sonner
-      theme={theme as ToasterProps["theme"]}
+      theme="dark"
       className="toaster group"
       icons={{
         success: (
diff --git a/src/pages/Login.tsx b/src/pages/Login.tsx
index d11a441..f2c108e 100644
--- a/src/pages/Login.tsx
+++ b/src/pages/Login.tsx
@@ -1,7 +1,12 @@
+//===========================================
+// File: Login.tsx
+// Componente per la gestione pagine di Login
+// @author: "villari.andrea@libero.it"
+// @version: "1.0.0 2026-07-14"
+//===========================================
 import { CircleAlert } from "lucide-react";
 import { useState, type FormEvent } from "react";
 import { useNavigate } from "react-router-dom";
-import ThemeToggle from "@/components/ThemeToggle";
 import { Alert, AlertDescription } from "@/components/ui/alert";
 import { Button } from "@/components/ui/button";
 import {
@@ -38,10 +43,7 @@ export default function Login() {
   };
 
   return (
-    <div className="relative flex min-h-svh items-center justify-center bg-muted/40 p-4">
-      <div className="absolute top-4 right-4">
-        <ThemeToggle />
-      </div>
+    <div className="flex min-h-svh items-center justify-center bg-muted/40 p-4">
       <Card className="w-full max-w-md">
         <CardHeader>
           <CardTitle className="text-xl">Academy Aziendale</CardTitle>