diff --git a/frontend/src/components/layout/protected.rs b/frontend/src/components/layout/protected.rs
index c4d37c7..bed9f11 100644
--- a/frontend/src/components/layout/protected.rs
+++ b/frontend/src/components/layout/protected.rs
@@ -6,17 +6,22 @@ use crate::components::ui::sidenav::{SidenavWrapper, Sidenav, SidenavInset};
 
 #[component]
 pub fn Protected(children: Children) -> impl IntoView {
+    let (collapsed, set_collapsed) = signal(false);
+
     view! {
         <SidenavWrapper attr:style="--sidenav-width:16rem; --sidenav-width-icon:3rem;">
             // Masaüstü Sidenav
-            <Sidenav>
+            <Sidenav 
+                data_collapsible=crate::components::ui::sidenav::SidenavCollapsible::Icon 
+                data_state=if collapsed.get() { crate::components::ui::sidenav::SidenavState::Collapsed } else { crate::components::ui::sidenav::SidenavState::Expanded }
+            >
                 <Sidebar />
             </Sidenav>
 
             // İçerik Alanı
             <SidenavInset class="flex flex-col h-screen overflow-hidden">
                 // Toolbar (Üst Bar)
-                <Toolbar />
+                <Toolbar on_toggle_sidebar=move |_| set_collapsed.update(|c| *c = !*c) />
                 
                 // Ana İçerik
                 <main class="flex-1 overflow-y-auto relative bg-background flex flex-col">
diff --git a/frontend/src/components/layout/sidebar.rs b/frontend/src/components/layout/sidebar.rs
index daee297..c423c71 100644
--- a/frontend/src/components/layout/sidebar.rs
+++ b/frontend/src/components/layout/sidebar.rs
@@ -87,7 +87,7 @@ pub fn Sidebar() -> impl IntoView {
                         <path stroke-linecap="round" stroke-linejoin="round" d="M15.362 5.214A8.252 8.252 0 0112 21 8.25 8.25 0 016.038 7.048 8.287 8.287 0 009 9.6a8.983 8.983 0 013.361-6.867 8.21 8.25 0 003 2.48z" />
                     </svg>
                 </div>
-                <div class="grid flex-1 text-left text-sm leading-tight overflow-hidden">
+                <div class="grid flex-1 text-left text-sm leading-tight overflow-hidden group-data-[state=Collapsed]:hidden">
                     <span class="truncate font-semibold text-foreground text-base">"VibeTorrent"</span>
                     <span class="truncate text-[10px] text-muted-foreground opacity-70">"v3.0.0"</span>
                 </div>
@@ -150,26 +150,28 @@ pub fn Sidebar() -> impl IntoView {
             <div class="flex flex-col gap-4 p-4">
                 // Push Notification Toggle
                 <div class="flex items-center justify-between px-2 py-1 bg-muted/20 rounded-md border border-border/50">
-                    <div class="flex flex-col gap-0.5">
+                    <div class="flex flex-col gap-0.5 group-data-[state=Collapsed]:hidden">
                         <span class="text-[10px] font-bold uppercase tracking-wider text-foreground/70">"Bildirimler"</span>
                         <span class="text-[9px] text-muted-foreground">"Web Push"</span>
                     </div>
-                    <Switch 
-                        checked=Signal::from(store.push_enabled) 
-                        on_checked_change=Callback::new(on_push_toggle)
-                    />
+                    <div class="group-data-[state=Collapsed]:hidden">
+                        <Switch 
+                            checked=Signal::from(store.push_enabled) 
+                            on_checked_change=Callback::new(on_push_toggle)
+                        />
+                    </div>
                 </div>
 
-                <div class="flex items-center gap-3 p-2 rounded-lg border bg-muted/30 shadow-xs overflow-hidden">
+                <div class="flex items-center gap-3 p-2 rounded-lg border bg-muted/30 shadow-xs overflow-hidden group-data-[state=Collapsed]:gap-0 group-data-[state=Collapsed]:justify-center group-data-[state=Collapsed]:p-0 group-data-[state=Collapsed]:border-none group-data-[state=Collapsed]:bg-transparent group-data-[state=Collapsed]:shadow-none">
                     <div class="h-8 w-8 rounded-full bg-primary text-primary-foreground flex items-center justify-center text-xs font-medium shrink-0 border border-primary-foreground/10">
                         {first_letter}
                     </div>
-                    <div class="flex-1 overflow-hidden">
+                    <div class="flex-1 overflow-hidden group-data-[state=Collapsed]:hidden">
                         <div class="font-medium text-[11px] truncate text-foreground leading-tight">{username}</div>
                         <div class="text-[9px] text-muted-foreground truncate opacity-70">"Yönetici"</div>
                     </div>
                     
-                    <div class="flex items-center gap-1">
+                    <div class="flex items-center gap-1 group-data-[state=Collapsed]:hidden">
                         <ThemeToggle />
                         
                         <Button
@@ -217,8 +219,8 @@ fn SidebarItem(
                 <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="size-4 shrink-0">
                     <path stroke-linecap="round" stroke-linejoin="round" d=icon.clone() />
                 </svg>
-                <span class="flex-1 truncate">{label}</span>
-                <span class="text-[10px] font-mono opacity-50">{count}</span>
+                <span class="flex-1 truncate group-data-[state=Collapsed]:hidden">{label}</span>
+                <span class="text-[10px] font-mono opacity-50 group-data-[state=Collapsed]:hidden">{count}</span>
             </SidenavMenuButton>
         </SidenavMenuItem>
     }
diff --git a/frontend/src/components/layout/toolbar.rs b/frontend/src/components/layout/toolbar.rs
index 5f991cf..45752f1 100644
--- a/frontend/src/components/layout/toolbar.rs
+++ b/frontend/src/components/layout/toolbar.rs
@@ -7,11 +7,25 @@ use crate::components::ui::dialog::{Dialog, DialogContent, DialogTrigger};
 use crate::components::layout::sidebar::Sidebar;
 
 #[component]
-pub fn Toolbar() -> impl IntoView {
+pub fn Toolbar(
+    #[prop(into)] on_toggle_sidebar: Callback<()>,
+) -> impl IntoView {
     view! {
         <div class="flex min-h-14 h-auto items-center border-b border-border bg-background px-4" style="padding-top: env(safe-area-inset-top);">
             // Sol kısım: Menü butonu (Mobil) + Add Torrent
             <div class="flex items-center gap-3">
+                // Desktop Toggle Button
+                <div class="hidden lg:block">
+                    <Button
+                        variant=ButtonVariant::Ghost
+                        size=ButtonSize::Icon
+                        class="size-9"
+                        on:click=move |_| on_toggle_sidebar.run(())
+                    >
+                        <PanelLeft class="size-5" />
+                        <span class="hidden">"Menüyü Daralt/Genişlet"</span>
+                    </Button>
+                </div>
                 
                 // --- MOBILE SHEET (SIDEBAR) ---
                 <div class="lg:hidden">
diff --git a/frontend/src/components/ui/sidenav.rs b/frontend/src/components/ui/sidenav.rs
index 91f0aa4..90c5c56 100644
--- a/frontend/src/components/ui/sidenav.rs
+++ b/frontend/src/components/ui/sidenav.rs
@@ -145,7 +145,8 @@ pub fn Sidenav(
                     data-name="Sidenav"
                     data-sidenav=data_state.to_string()
                     data-side=data_side.to_string()
-                    class="hidden md:block group peer text-sidenav-foreground data-[state=Collapsed]:hidden"
+                    data-collapsible=data_collapsible.to_string()
+                    class="hidden md:block group peer text-sidenav-foreground group-data-[collapsible=Offcanvas]:data-[state=Collapsed]:hidden"
                 >
                     // * SidenavGap: This is what handles the sidenav gap on desktop
                     <div
@@ -155,9 +156,9 @@ pub fn Sidenav(
                             "group-data-[collapsible=Offcanvas]:w-0",
                             "group-data-[side=Right]:rotate-180",
                             match variant {
-                                SidenavVariant::Sidenav => "group-data-[collapsible=Icon]:w-(--sidenav-width-icon)",
+                                SidenavVariant::Sidenav => "group-data-[collapsible=Icon]:group-data-[state=Collapsed]:w-(--sidenav-width-icon)",
                                 SidenavVariant::Floating | SidenavVariant::Inset =>
-                                    "group-data-[collapsible=Icon]:w-[calc(var(--sidenav-width-icon)+(--spacing(4)))]",
+                                    "group-data-[collapsible=Icon]:group-data-[state=Collapsed]:w-[calc(var(--sidenav-width-icon)+(--spacing(4)))]",
                             }
                         )
                     />
@@ -171,9 +172,9 @@ pub fn Sidenav(
                                 SidenavSide::Right => "right-0 group-data-[collapsible=Offcanvas]:right-[calc(var(--sidenav-width)*-1)]"
                             },
                             match variant {
-                                 SidenavVariant::Sidenav => "group-data-[collapsible=Icon]:w-(--sidenav-width-icon) group-data-[side=Left]:border-r group-data-[side=Right]:border-l",
+                                 SidenavVariant::Sidenav => "group-data-[collapsible=Icon]:group-data-[state=Collapsed]:w-(--sidenav-width-icon) group-data-[side=Left]:border-r group-data-[side=Right]:border-l",
                                 SidenavVariant::Floating | SidenavVariant::Inset =>
-                                    "p-2 group-data-[collapsible=Icon]:w-[calc(var(--sidenav-width-icon)+(--spacing(4))+2px)]",
+                                    "p-2 group-data-[collapsible=Icon]:group-data-[state=Collapsed]:w-[calc(var(--sidenav-width-icon)+(--spacing(4))+2px)]",
                             },
                         )
                     >