diff --git a/app/(protected)/layout.tsx b/app/(protected)/layout.tsx
index e5f4289..fd98d25 100644
--- a/app/(protected)/layout.tsx
+++ b/app/(protected)/layout.tsx
@@ -1,9 +1,8 @@
-// app/(protected)/layout.tsx
 export const dynamic = 'force-dynamic'
 
 import { createClient } from '@/lib/supabase/server'
 import { redirect } from 'next/navigation'
-import { NotificationBell } from '@/components/notifications/bell'
+import { Sidebar } from '@/components/layout/sidebar'
 
 export default async function ProtectedLayout({
   children,
@@ -17,10 +16,22 @@ export default async function ProtectedLayout({
 
   if (!user) redirect('/login')
 
+  const { data: profile } = await supabase
+    .from('users')
+    .select('role, name, email')
+    .eq('id', user.id)
+    .single()
+
   return (
-    <>
-      <NotificationBell />
-      {children}
-    </>
+    <div className="min-h-screen bg-gray-50">
+      <Sidebar
+        role={profile?.role ?? 'reporter'}
+        userName={profile?.name ?? user.email ?? ''}
+        userEmail={profile?.email ?? user.email ?? ''}
+      />
+      <div className="md:ml-60 pb-16 md:pb-0">
+        {children}
+      </div>
+    </div>
   )
 }
diff --git a/components/layout/sidebar.tsx b/components/layout/sidebar.tsx
new file mode 100644
index 0000000..4ccfef3
--- /dev/null
+++ b/components/layout/sidebar.tsx
@@ -0,0 +1,216 @@
+'use client'
+
+import Link from 'next/link'
+import { usePathname, useRouter } from 'next/navigation'
+import { createBrowserClient } from '@supabase/ssr'
+import { NotificationBell } from '@/components/notifications/bell'
+
+interface NavItem {
+  label: string
+  href: string
+  icon: React.ReactNode
+}
+
+interface SidebarProps {
+  role: string
+  userName: string
+  userEmail: string
+}
+
+const IconGrid = () => (
+  <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M4 6h16M4 12h16M4 18h7" />
+  </svg>
+)
+const IconList = () => (
+  <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2" />
+  </svg>
+)
+const IconCheck = () => (
+  <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z" />
+  </svg>
+)
+const IconChart = () => (
+  <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 19v-6a2 2 0 00-2-2H5a2 2 0 00-2 2v6a2 2 0 002 2h2a2 2 0 002-2zm0 0V9a2 2 0 012-2h2a2 2 0 012 2v10m-6 0a2 2 0 002 2h2a2 2 0 002-2m0 0V5a2 2 0 012-2h2a2 2 0 012 2v14a2 2 0 01-2 2h-2a2 2 0 01-2-2z" />
+  </svg>
+)
+const IconSettings = () => (
+  <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M10.325 4.317c.426-1.756 2.924-1.756 3.35 0a1.724 1.724 0 002.573 1.066c1.543-.94 3.31.826 2.37 2.37a1.724 1.724 0 001.065 2.572c1.756.426 1.756 2.924 0 3.35a1.724 1.724 0 00-1.066 2.573c.94 1.543-.826 3.31-2.37 2.37a1.724 1.724 0 00-2.572 1.065c-.426 1.756-2.924 1.756-3.35 0a1.724 1.724 0 00-2.573-1.066c-1.543.94-3.31-.826-2.37-2.37a1.724 1.724 0 00-1.065-2.572c-1.756-.426-1.756-2.924 0-3.35a1.724 1.724 0 001.066-2.573c-.94-1.543.826-3.31 2.37-2.37.996.608 2.296.07 2.572-1.065z" />
+    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
+  </svg>
+)
+const IconUsers = () => (
+  <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 4.354a4 4 0 110 5.292M15 21H3v-1a6 6 0 0112 0v1zm0 0h6v-1a6 6 0 00-9-5.197M13 7a4 4 0 11-8 0 4 4 0 018 0z" />
+  </svg>
+)
+const IconPlus = () => (
+  <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 4v16m8-8H4" />
+  </svg>
+)
+const IconLogout = () => (
+  <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M17 16l4-4m0 0l-4-4m4 4H7m6 4v1a3 3 0 01-3 3H6a3 3 0 01-3-3V7a3 3 0 013-3h4a3 3 0 013 3v1" />
+  </svg>
+)
+
+const NAV_ITEMS: Record<string, NavItem[]> = {
+  reporter: [
+    { label: 'My Reports', href: '/reporter', icon: <IconList /> },
+    { label: 'New Incident', href: '/report', icon: <IconPlus /> },
+  ],
+  supervisor: [
+    { label: 'Overview', href: '/supervisor', icon: <IconGrid /> },
+    { label: 'Incidents', href: '/supervisor/incidents', icon: <IconList /> },
+  ],
+  hse: [
+    { label: 'Dashboard', href: '/hse/dashboard', icon: <IconChart /> },
+    { label: 'Incidents', href: '/hse/incidents', icon: <IconList /> },
+    { label: 'CAPA', href: '/hse/capa', icon: <IconCheck /> },
+    { label: 'Settings', href: '/hse/settings', icon: <IconSettings /> },
+  ],
+  management: [
+    { label: 'Dashboard', href: '/management', icon: <IconChart /> },
+  ],
+  capa_owner: [
+    { label: 'My CAPAs', href: '/capa-owner', icon: <IconCheck /> },
+  ],
+  admin: [
+    { label: 'Admin', href: '/admin', icon: <IconUsers /> },
+    { label: 'Dashboard', href: '/hse/dashboard', icon: <IconChart /> },
+    { label: 'Incidents', href: '/hse/incidents', icon: <IconList /> },
+    { label: 'CAPA', href: '/hse/capa', icon: <IconCheck /> },
+    { label: 'Management', href: '/management', icon: <IconGrid /> },
+  ],
+}
+
+function initials(name: string): string {
+  return name
+    .split(' ')
+    .map(w => w[0] ?? '')
+    .join('')
+    .toUpperCase()
+    .slice(0, 2)
+}
+
+function useNavItems(role: string): NavItem[] {
+  return NAV_ITEMS[role] ?? NAV_ITEMS.reporter
+}
+
+function NavLink({ item, pathname }: { item: NavItem; pathname: string }) {
+  // Exact match for root-level single-page roles, prefix match otherwise
+  const exactRoots = ['/reporter', '/supervisor', '/management', '/capa-owner', '/admin', '/report']
+  const isActive = exactRoots.includes(item.href)
+    ? pathname === item.href
+    : pathname.startsWith(item.href)
+
+  return (
+    <Link
+      href={item.href}
+      className={`flex items-center gap-3 px-3 py-2 rounded-lg text-sm font-medium transition-colors ${
+        isActive
+          ? 'bg-blue-50 text-blue-700'
+          : 'text-gray-600 hover:bg-gray-100 hover:text-gray-900'
+      }`}
+    >
+      <span className={isActive ? 'text-blue-600' : 'text-gray-400'}>{item.icon}</span>
+      {item.label}
+    </Link>
+  )
+}
+
+export function Sidebar({ role, userName, userEmail }: SidebarProps) {
+  const pathname = usePathname()
+  const router = useRouter()
+  const items = useNavItems(role)
+  const mobileItems = items.slice(0, 4)
+
+  const logout = async () => {
+    const supabase = createBrowserClient(
+      process.env.NEXT_PUBLIC_SUPABASE_URL!,
+      process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY!,
+    )
+    await supabase.auth.signOut()
+    router.push('/login')
+  }
+
+  const displayName = userName || userEmail || 'User'
+  const roleLabel = role.replace(/_/g, ' ').replace(/\b\w/g, c => c.toUpperCase())
+
+  return (
+    <>
+      {/* Desktop sidebar */}
+      <aside className="hidden md:flex fixed left-0 top-0 h-full w-60 bg-white border-r border-gray-200 flex-col z-40">
+        {/* Header */}
+        <div className="flex items-center justify-between px-4 py-4 border-b border-gray-100">
+          <span className="text-base font-bold text-gray-900 tracking-tight">IMS</span>
+          <NotificationBell />
+        </div>
+
+        {/* Nav */}
+        <nav className="flex-1 overflow-y-auto px-3 py-3 space-y-1">
+          {items.map(item => (
+            <NavLink key={item.href} item={item} pathname={pathname} />
+          ))}
+        </nav>
+
+        {/* User + logout */}
+        <div className="border-t border-gray-100 px-3 py-3">
+          <div className="flex items-center gap-2 px-2 py-2 mb-1">
+            <div className="w-8 h-8 rounded-full bg-blue-600 flex items-center justify-center text-white text-xs font-bold flex-shrink-0">
+              {initials(displayName)}
+            </div>
+            <div className="min-w-0">
+              <p className="text-sm font-medium text-gray-900 truncate">{displayName}</p>
+              <p className="text-xs text-gray-500 truncate">{roleLabel}</p>
+            </div>
+          </div>
+          <button
+            onClick={logout}
+            className="flex items-center gap-2 w-full px-3 py-2 text-sm text-gray-600 hover:bg-gray-100 hover:text-gray-900 rounded-lg transition-colors"
+          >
+            <IconLogout />
+            Logout
+          </button>
+        </div>
+      </aside>
+
+      {/* Mobile bottom tab bar */}
+      <nav className="md:hidden fixed bottom-0 left-0 right-0 bg-white border-t border-gray-200 flex z-40 safe-area-pb">
+        {mobileItems.map(item => {
+          const exactRoots = ['/reporter', '/supervisor', '/management', '/capa-owner', '/admin', '/report']
+          const isActive = exactRoots.includes(item.href)
+            ? pathname === item.href
+            : pathname.startsWith(item.href)
+          return (
+            <Link
+              key={item.href}
+              href={item.href}
+              className={`flex-1 flex flex-col items-center gap-1 py-2 text-[10px] font-medium transition-colors ${
+                isActive ? 'text-blue-600' : 'text-gray-400'
+              }`}
+            >
+              {item.icon}
+              <span className="leading-none">{item.label}</span>
+            </Link>
+          )
+        })}
+        {/* Mobile logout in "More" slot if room */}
+        {items.length <= 4 && (
+          <button
+            onClick={logout}
+            className="flex-1 flex flex-col items-center gap-1 py-2 text-[10px] font-medium text-gray-400"
+          >
+            <IconLogout />
+            <span className="leading-none">Logout</span>
+          </button>
+        )}
+      </nav>
+    </>
+  )
+}