feat: Réorganiser la navigation admin en catégories pour améliorer l'UX mobile-first

Le menu d'administration contenait 13 liens à plat dans le header, ce qui
débordait sur desktop et rendait le drawer mobile trop long à scanner.

Les liens sont maintenant regroupés en 4 catégories (Personnes, Organisation,
Année scolaire, Paramètres) avec des dropdowns au survol sur desktop et des
accordéons repliables dans le drawer mobile. Le nombre d'éléments visibles
passe de 13 à 5 (1 lien direct + 4 catégories), la catégorie active
s'auto-déplie dans le menu mobile.

frontend/e2e/admin-responsive-nav.spec.ts

@@ -119,6 +119,7 @@ test.describe('Admin Responsive Navigation', () => {
 			const drawer = page.locator('[role="dialog"][aria-modal="true"]');
 			await expect(drawer).toBeVisible();
 
+			// Active category "Personnes" should be auto-expanded
 			const activeLink = drawer.locator('.mobile-nav-link.active');
 			await expect(activeLink).toHaveText('Utilisateurs');
 		});
@@ -128,11 +129,13 @@ test.describe('Admin Responsive Navigation', () => {
 			await page.goto(`${ALPHA_URL}/admin/users`);
 			await page.waitForLoadState('networkidle');
 
-			// Open menu and click Classes
+			// Open menu and expand "Organisation" section to find "Classes"
 			await page.getByRole('button', { name: /ouvrir le menu/i }).click();
 			const drawer = page.locator('[role="dialog"][aria-modal="true"]');
 			await expect(drawer).toBeVisible();
 
+			// Expand "Organisation" accordion
+			await drawer.getByRole('button', { name: 'Organisation' }).click();
 			await drawer.getByRole('link', { name: 'Classes' }).click();
 
 			// Menu should close and page should navigate
@@ -143,6 +146,30 @@ test.describe('Admin Responsive Navigation', () => {
 			const label = page.locator('.mobile-section-label');
 			await expect(label).toHaveText('Classes');
 		});
+
+		test('accordion sections expand and collapse', async ({ page }) => {
+			await loginAsAdmin(page);
+			await page.goto(`${ALPHA_URL}/admin/users`);
+			await page.waitForLoadState('networkidle');
+
+			await page.getByRole('button', { name: /ouvrir le menu/i }).click();
+			const drawer = page.locator('[role="dialog"][aria-modal="true"]');
+			await expect(drawer).toBeVisible();
+
+			// "Personnes" should be auto-expanded (active category)
+			await expect(drawer.getByRole('link', { name: 'Utilisateurs' })).toBeVisible();
+
+			// "Organisation" should be collapsed initially
+			await expect(drawer.getByRole('link', { name: 'Classes' })).not.toBeVisible();
+
+			// Expand "Organisation"
+			await drawer.getByRole('button', { name: 'Organisation' }).click();
+			await expect(drawer.getByRole('link', { name: 'Classes' })).toBeVisible();
+
+			// Collapse "Organisation"
+			await drawer.getByRole('button', { name: 'Organisation' }).click();
+			await expect(drawer.getByRole('link', { name: 'Classes' })).not.toBeVisible();
+		});
 	});
 
 	// =========================================================================
@@ -163,7 +190,7 @@ test.describe('Admin Responsive Navigation', () => {
 			await expect(desktopNav).not.toBeVisible();
 		});
 
-		test('drawer opens and works', async ({ page }) => {
+		test('drawer opens and shows grouped nav', async ({ page }) => {
 			await loginAsAdmin(page);
 			await page.goto(`${ALPHA_URL}/admin/users`);
 			await page.waitForLoadState('networkidle');
@@ -172,8 +199,11 @@ test.describe('Admin Responsive Navigation', () => {
 			const drawer = page.locator('[role="dialog"][aria-modal="true"]');
 			await expect(drawer).toBeVisible();
 
-			// All nav links should be visible in drawer
+			// "Personnes" auto-expanded (contains active link Utilisateurs)
 			await expect(drawer.getByRole('link', { name: 'Utilisateurs' })).toBeVisible();
+
+			// Expand "Organisation" to see its links
+			await drawer.getByRole('button', { name: 'Organisation' }).click();
 			await expect(drawer.getByRole('link', { name: 'Classes' })).toBeVisible();
 			await expect(drawer.getByRole('link', { name: 'Matières' })).toBeVisible();
 		});
@@ -197,18 +227,42 @@ test.describe('Admin Responsive Navigation', () => {
 			await expect(desktopNav).toBeVisible();
 		});
 
-		test('desktop nav shows all navigation links', async ({ page }) => {
+		test('desktop nav shows category dropdowns', async ({ page }) => {
 			await loginAsAdmin(page);
 			await page.goto(`${ALPHA_URL}/admin/users`);
 			await page.waitForLoadState('networkidle');
 
 			const nav = page.locator('.desktop-nav');
-			await expect(nav.getByRole('link', { name: 'Utilisateurs' })).toBeVisible();
+
-			await expect(nav.getByRole('link', { name: 'Classes' })).toBeVisible();
+			// Category triggers should be visible
-			await expect(nav.getByRole('link', { name: 'Matières' })).toBeVisible();
+			await expect(nav.getByRole('button', { name: /personnes/i })).toBeVisible();
-			await expect(nav.getByRole('link', { name: 'Affectations' })).toBeVisible();
+			await expect(nav.getByRole('button', { name: /organisation/i })).toBeVisible();
-			await expect(nav.getByRole('link', { name: 'Périodes' })).toBeVisible();
+			await expect(nav.getByRole('button', { name: /année scolaire/i })).toBeVisible();
-			await expect(nav.getByRole('link', { name: 'Pédagogie' })).toBeVisible();
+			await expect(nav.getByRole('button', { name: /paramètres/i })).toBeVisible();
+
+			// Hover "Personnes" to reveal dropdown
+			await nav.getByRole('button', { name: /personnes/i }).hover();
+			const dropdown = nav.locator('.dropdown-panel').first();
+			await expect(dropdown).toBeVisible();
+			await expect(dropdown.getByRole('menuitem', { name: 'Utilisateurs' })).toBeVisible();
+			await expect(dropdown.getByRole('menuitem', { name: 'Élèves' })).toBeVisible();
+
+			// Hover "Organisation"
+			await nav.getByRole('button', { name: /organisation/i }).hover();
+			const orgDropdown = nav.locator('.dropdown-panel').first();
+			await expect(orgDropdown.getByRole('menuitem', { name: 'Classes' })).toBeVisible();
+			await expect(orgDropdown.getByRole('menuitem', { name: 'Matières' })).toBeVisible();
+			await expect(orgDropdown.getByRole('menuitem', { name: 'Affectations' })).toBeVisible();
+		});
+
+		test('active category trigger is highlighted', async ({ page }) => {
+			await loginAsAdmin(page);
+			await page.goto(`${ALPHA_URL}/admin/users`);
+			await page.waitForLoadState('networkidle');
+
+			const nav = page.locator('.desktop-nav');
+			const personnesTrigger = nav.getByRole('button', { name: /personnes/i });
+			await expect(personnesTrigger).toHaveClass(/active/);
 		});
 
 		test('hides mobile section label', async ({ page }) => {

frontend/e2e/calendar.spec.ts

@@ -83,7 +83,10 @@ test.describe('Calendar Management (Story 2.11)', () => {
 			await loginAsAdmin(page);
 			await page.goto(`${ALPHA_URL}/admin/classes`);
 
-			await page.getByRole('link', { name: /calendrier/i }).click();
+			// Hover "Année scolaire" category to reveal dropdown
+			const nav = page.locator('.desktop-nav');
+			await nav.getByRole('button', { name: /année scolaire/i }).hover();
+			await nav.getByRole('menuitem', { name: /calendrier/i }).click();
 
 			await expect(page).toHaveURL(/\/admin\/calendar/);
 			await expect(

frontend/e2e/pedagogy.spec.ts

@@ -59,7 +59,10 @@ test.describe('Pedagogy - Grading Mode Configuration (Story 2.4)', () => {
 		await loginAsAdmin(page);
 		await page.goto(`${ALPHA_URL}/admin/classes`);
 
-		const pedagogyLink = page.getByRole('link', { name: /pédagogie/i });
+		// Hover "Paramètres" category to reveal dropdown
+		const nav = page.locator('.desktop-nav');
+		await nav.getByRole('button', { name: /paramètres/i }).hover();
+		const pedagogyLink = nav.getByRole('menuitem', { name: /pédagogie/i });
 		await expect(pedagogyLink).toBeVisible();
 	});
 
@@ -67,7 +70,10 @@ test.describe('Pedagogy - Grading Mode Configuration (Story 2.4)', () => {
 		await loginAsAdmin(page);
 		await page.goto(`${ALPHA_URL}/admin/classes`);
 
-		await page.getByRole('link', { name: /pédagogie/i }).click();
+		// Hover "Paramètres" category to reveal dropdown
+		const nav = page.locator('.desktop-nav');
+		await nav.getByRole('button', { name: /paramètres/i }).hover();
+		await nav.getByRole('menuitem', { name: /pédagogie/i }).click();
 		await expect(page).toHaveURL(/\/admin\/pedagogy/, { timeout: 10000 });
 	});
 

frontend/e2e/periods.spec.ts

@@ -288,8 +288,10 @@ test.describe('Periods Management (Story 2.3)', () => {
 			await loginAsAdmin(page);
 			await page.goto(`${ALPHA_URL}/admin`);
 
-			// Click on periods link in the admin navigation
+			// Hover "Année scolaire" category to reveal dropdown
-			await page.getByRole('link', { name: /périodes/i }).click();
+			const nav = page.locator('.desktop-nav');
+			await nav.getByRole('button', { name: /année scolaire/i }).hover();
+			await nav.getByRole('menuitem', { name: /périodes/i }).click();
 
 			await expect(page).toHaveURL(/\/admin\/academic-year\/periods/);
 			await expect(page.getByRole('heading', { name: /périodes scolaires/i })).toBeVisible();

frontend/e2e/role-access-control.spec.ts

@@ -184,10 +184,14 @@ test.describe('Role-Based Access Control [P0]', () => {
 			await loginAs(page, ADMIN_EMAIL, ADMIN_PASSWORD);
 			await page.goto(`${ALPHA_URL}/admin`);
 
-			// Admin layout should show navigation links (scoped to desktop nav to avoid action cards)
+			// Admin layout should show grouped navigation (category triggers in desktop nav)
 			const nav = page.locator('.desktop-nav');
-			await expect(nav.getByRole('link', { name: 'Utilisateurs' })).toBeVisible({ timeout: 15000 });
+			await expect(nav.getByRole('button', { name: /personnes/i })).toBeVisible({ timeout: 15000 });
-			await expect(nav.getByRole('link', { name: 'Classes' })).toBeVisible();
+			await expect(nav.getByRole('button', { name: /organisation/i })).toBeVisible();
+
+			// Hover to reveal dropdown links
+			await nav.getByRole('button', { name: /personnes/i }).hover();
+			await expect(nav.getByRole('menuitem', { name: 'Utilisateurs' })).toBeVisible();
 		});
 
 		test('[P0] teacher sees dashboard without admin navigation', async ({ page }) => {

frontend/e2e/student-creation.spec.ts

@@ -145,8 +145,10 @@ test.describe('Student Creation & Management (Story 3.0)', () => {
 			await loginAsAdmin(page);
 			await page.goto(`${ALPHA_URL}/admin/students`);
 
-			// The nav should have an active "Élèves" link
+			// Hover "Personnes" category to reveal dropdown with "Élèves" link
-			await expect(page.locator('nav a', { hasText: /élèves/i })).toBeVisible({
+			const nav = page.locator('.desktop-nav');
+			await nav.getByRole('button', { name: /personnes/i }).hover();
+			await expect(nav.getByRole('menuitem', { name: /élèves/i })).toBeVisible({
 				timeout: 10000
 			});
 		});

frontend/e2e/teacher-assignments.spec.ts

@@ -118,7 +118,10 @@ test.describe('Teacher Assignments (Story 2.8)', () => {
 			await loginAsAdmin(page);
 			await page.goto(`${ALPHA_URL}/admin`);
 
-			const navLink = page.getByRole('link', { name: /affectations/i });
+			// Hover "Organisation" category to reveal dropdown
+			const nav = page.locator('.desktop-nav');
+			await nav.getByRole('button', { name: /organisation/i }).hover();
+			const navLink = nav.getByRole('menuitem', { name: /affectations/i });
 			await expect(navLink).toBeVisible({ timeout: 15000 });
 		});
 

frontend/e2e/teacher-replacements.spec.ts

@@ -121,7 +121,10 @@ test.describe('Teacher Replacements (Story 2.9)', () => {
 			await loginAsAdmin(page);
 			await page.goto(`${ALPHA_URL}/admin`);
 
-			const navLink = page.getByRole('link', { name: /remplacements/i });
+			// Hover "Organisation" category to reveal dropdown
+			const nav = page.locator('.desktop-nav');
+			await nav.getByRole('button', { name: /organisation/i }).hover();
+			const navLink = nav.getByRole('menuitem', { name: /remplacements/i });
 			await expect(navLink).toBeVisible({ timeout: 15000 });
 		});
 

frontend/src/routes/admin/+layout.svelte

@@ -22,20 +22,53 @@
 		'ROLE_SECRETARIAT'
 	];
 
-	const navLinks = [
+	// Types
-		{ href: '/dashboard', label: 'Tableau de bord', isActive: () => false },
+	type NavLink = { href: string; label: string };
-		{ href: '/admin/users', label: 'Utilisateurs', isActive: () => isUsersActive },
+	type NavCategory = { id: string; label: string; links: NavLink[] };
-		{ href: '/admin/parent-invitations', label: 'Invitations parents', isActive: () => isParentInvitationsActive },
+	type NavEntry = NavLink | NavCategory;
-		{ href: '/admin/students', label: 'Élèves', isActive: () => isStudentsActive },
+
-		{ href: '/admin/classes', label: 'Classes', isActive: () => isClassesActive },
+	function isCategory(entry: NavEntry): entry is NavCategory {
-		{ href: '/admin/subjects', label: 'Matières', isActive: () => isSubjectsActive },
+		return 'links' in entry;
-		{ href: '/admin/assignments', label: 'Affectations', isActive: () => isAssignmentsActive },
+	}
-		{ href: '/admin/replacements', label: 'Remplacements', isActive: () => isReplacementsActive },
+
-		{ href: '/admin/academic-year/periods', label: 'Périodes', isActive: () => isPeriodsActive },
+	const navEntries: NavEntry[] = [
-		{ href: '/admin/calendar', label: 'Calendrier', isActive: () => isCalendarActive },
+		{ href: '/dashboard', label: 'Tableau de bord' },
-		{ href: '/admin/image-rights', label: 'Droit à l\'image', isActive: () => isImageRightsActive },
+		{
-		{ href: '/admin/pedagogy', label: 'Pédagogie', isActive: () => isPedagogyActive },
+			id: 'personnes',
-		{ href: '/admin/branding', label: 'Identité visuelle', isActive: () => isBrandingActive }
+			label: 'Personnes',
+			links: [
+				{ href: '/admin/users', label: 'Utilisateurs' },
+				{ href: '/admin/parent-invitations', label: 'Invitations parents' },
+				{ href: '/admin/students', label: 'Élèves' }
+			]
+		},
+		{
+			id: 'organisation',
+			label: 'Organisation',
+			links: [
+				{ href: '/admin/classes', label: 'Classes' },
+				{ href: '/admin/subjects', label: 'Matières' },
+				{ href: '/admin/assignments', label: 'Affectations' },
+				{ href: '/admin/replacements', label: 'Remplacements' }
+			]
+		},
+		{
+			id: 'annee',
+			label: 'Année scolaire',
+			links: [
+				{ href: '/admin/academic-year/periods', label: 'Périodes' },
+				{ href: '/admin/calendar', label: 'Calendrier' }
+			]
+		},
+		{
+			id: 'parametres',
+			label: 'Paramètres',
+			links: [
+				{ href: '/admin/image-rights', label: "Droit à l'image" },
+				{ href: '/admin/pedagogy', label: 'Pédagogie' },
+				{ href: '/admin/branding', label: 'Identité visuelle' }
+			]
+		}
 	];
 
 	// Load user roles and verify admin access
@@ -81,43 +114,81 @@
 		mobileMenuOpen = false;
 	}
 
-	// Determine which admin section is active
+	// Active link detection
-	const isUsersActive = $derived(page.url.pathname.startsWith('/admin/users'));
+	const activeLinkHref = $derived.by(() => {
-	const isParentInvitationsActive = $derived(page.url.pathname.startsWith('/admin/parent-invitations'));
+		const path = page.url.pathname;
-	const isStudentsActive = $derived(page.url.pathname.startsWith('/admin/students'));
+		for (const entry of navEntries) {
-	const isClassesActive = $derived(page.url.pathname.startsWith('/admin/classes'));
+			if (isCategory(entry)) {
-	const isSubjectsActive = $derived(page.url.pathname.startsWith('/admin/subjects'));
+				for (const link of entry.links) {
-	const isPeriodsActive = $derived(page.url.pathname.startsWith('/admin/academic-year/periods'));
+					if (path.startsWith(link.href)) return link.href;
-	const isAssignmentsActive = $derived(page.url.pathname.startsWith('/admin/assignments'));
+				}
-	const isReplacementsActive = $derived(page.url.pathname.startsWith('/admin/replacements'));
+			} else if (entry.href !== '/dashboard' && path.startsWith(entry.href)) {
-	const isCalendarActive = $derived(page.url.pathname.startsWith('/admin/calendar'));
+				return entry.href;
-	const isImageRightsActive = $derived(page.url.pathname.startsWith('/admin/image-rights'));
+			}
-	const isPedagogyActive = $derived(page.url.pathname.startsWith('/admin/pedagogy'));
+		}
-	const isBrandingActive = $derived(page.url.pathname.startsWith('/admin/branding'));
+		return null;
+	});
+
+	const activeCategoryId = $derived.by(() => {
+		if (!activeLinkHref) return null;
+		for (const entry of navEntries) {
+			if (isCategory(entry) && entry.links.some((l) => l.href === activeLinkHref)) {
+				return entry.id;
+			}
+		}
+		return null;
+	});
 
 	const currentSectionLabel = $derived.by(() => {
 		const path = page.url.pathname;
-		for (const link of navLinks) {
+		for (const entry of navEntries) {
-			if (link.href !== '/dashboard' && path.startsWith(link.href)) {
+			if (isCategory(entry)) {
-				return link.label;
+				for (const link of entry.links) {
+					if (path.startsWith(link.href)) return link.label;
+				}
 			}
 		}
 		return 'Administration';
 	});
 
-	// Close menu on route change
+	// Desktop dropdown state
+	let openDesktopCategory = $state<string | null>(null);
+
+	// Mobile accordion state
+	let openMobileCategories = $state<Set<string>>(new Set());
+
+	function toggleMobileCategory(id: string) {
+		const next = new Set(openMobileCategories);
+		if (next.has(id)) {
+			next.delete(id);
+		} else {
+			next.add(id);
+		}
+		openMobileCategories = next;
+	}
+
+	// Auto-expand active category in mobile when drawer opens
+	$effect(() => {
+		if (mobileMenuOpen && activeCategoryId) {
+			openMobileCategories = new Set([activeCategoryId]);
+		}
+	});
+
+	// Close menus on route change
 	$effect(() => {
 		void page.url.pathname;
 		mobileMenuOpen = false;
+		openDesktopCategory = null;
 	});
 
-	// Close menu on Escape key
+	// Close on Escape key
 	$effect(() => {
-		if (!mobileMenuOpen) return;
+		if (!mobileMenuOpen && !openDesktopCategory) return;
 
 		function handleKeydown(e: KeyboardEvent) {
 			if (e.key === 'Escape') {
-				mobileMenuOpen = false;
+				if (openDesktopCategory) openDesktopCategory = null;
+				if (mobileMenuOpen) mobileMenuOpen = false;
 			}
 		}
 
@@ -125,7 +196,7 @@
 		return () => document.removeEventListener('keydown', handleKeydown);
 	});
 
-	// Lock body scroll when menu is open
+	// Lock body scroll when mobile menu is open
 	$effect(() => {
 		if (mobileMenuOpen) {
 			document.body.style.overflow = 'hidden';
@@ -169,10 +240,52 @@
 
 				<nav class="desktop-nav">
 					<RoleSwitcher />
-					{#each navLinks as link}
+					{#each navEntries as entry}
-						<a href={link.href} class="nav-link" class:active={link.isActive()}>{link.label}</a>
+						{#if isCategory(entry)}
+							<!-- svelte-ignore a11y_no_static_element_interactions -->
+							<div
+								class="dropdown-wrapper"
+								onmouseenter={() => (openDesktopCategory = entry.id)}
+								onmouseleave={() => (openDesktopCategory = null)}
+							>
+								<button
+									class="nav-link dropdown-trigger"
+									class:active={activeCategoryId === entry.id}
+									aria-expanded={openDesktopCategory === entry.id}
+									aria-haspopup="true"
+									onclick={() =>
+										(openDesktopCategory =
+											openDesktopCategory === entry.id ? null : entry.id)}
+								>
+									{entry.label}
+									<span
+										class="dropdown-chevron"
+										class:open={openDesktopCategory === entry.id}
+									>
+										&#9662;
+									</span>
+								</button>
+								{#if openDesktopCategory === entry.id}
+									<div class="dropdown-panel" role="menu">
+										{#each entry.links as link}
+											<a
+												href={link.href}
+												class="dropdown-link"
+												class:active={activeLinkHref === link.href}
+												role="menuitem"
+												onclick={() => (openDesktopCategory = null)}
+											>
+												{link.label}
+											</a>
+										{/each}
+									</div>
+								{/if}
+							</div>
+						{:else}
+							<a href={entry.href} class="nav-link">{entry.label}</a>
+						{/if}
 					{/each}
-					<button class="nav-button" onclick={goSettings}>Paramètres</button>
+					<button class="nav-button" onclick={goSettings}>Réglages</button>
 					<button class="logout-button" onclick={handleLogout} disabled={isLoggingOut}>
 						{#if isLoggingOut}
 							<span class="spinner"></span>
@@ -215,18 +328,49 @@
 					<div class="mobile-role-switcher">
 						<RoleSwitcher />
 					</div>
-					{#each navLinks as link}
+					{#each navEntries as entry}
-						<a
+						{#if isCategory(entry)}
-							href={link.href}
+							<div class="mobile-section">
-							class="mobile-nav-link"
+								<button
-							class:active={link.isActive()}
+									class="mobile-section-toggle"
-						>
+									class:active={activeCategoryId === entry.id}
-							{link.label}
+									aria-expanded={openMobileCategories.has(entry.id)}
-						</a>
+									onclick={() => toggleMobileCategory(entry.id)}
+								>
+									{entry.label}
+									<span
+										class="accordion-chevron"
+										class:open={openMobileCategories.has(entry.id)}
+									>
+										&#9662;
+									</span>
+								</button>
+								{#if openMobileCategories.has(entry.id)}
+									<div class="mobile-section-links">
+										{#each entry.links as link}
+											<a
+												href={link.href}
+												class="mobile-nav-link"
+												class:active={activeLinkHref === link.href}
+											>
+												{link.label}
+											</a>
+										{/each}
+									</div>
+								{/if}
+							</div>
+						{:else}
+							<a
+								href={entry.href}
+								class="mobile-nav-link mobile-standalone-link"
+							>
+								{entry.label}
+							</a>
+						{/if}
 					{/each}
 				</div>
 				<div class="mobile-drawer-footer">
-					<button class="mobile-nav-link" onclick={goSettings}>Paramètres</button>
+					<button class="mobile-nav-link" onclick={goSettings}>Réglages</button>
 					<button
 						class="mobile-nav-link mobile-logout"
 						onclick={handleLogout}
@@ -378,6 +522,65 @@
 		background: var(--accent-primary-light, #e0f2fe);
 	}
 
+	/* Dropdown */
+	.dropdown-wrapper {
+		position: relative;
+	}
+
+	.dropdown-trigger {
+		display: inline-flex;
+		align-items: center;
+		gap: 0.25rem;
+		background: none;
+		border: none;
+		cursor: pointer;
+	}
+
+	.dropdown-chevron {
+		font-size: 0.625rem;
+		transition: transform 0.2s;
+		line-height: 1;
+	}
+
+	.dropdown-chevron.open {
+		transform: rotate(180deg);
+	}
+
+	.dropdown-panel {
+		position: absolute;
+		top: 100%;
+		left: 0;
+		min-width: 200px;
+		background: var(--surface-elevated, #fff);
+		border: 1px solid var(--border-subtle, #e2e8f0);
+		border-radius: 0.5rem;
+		box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
+		padding: 0.375rem 0;
+		z-index: 150;
+		animation: fadeIn 0.15s ease-out;
+	}
+
+	.dropdown-link {
+		display: block;
+		padding: 0.5rem 1rem;
+		font-size: 0.8125rem;
+		font-weight: 500;
+		color: var(--text-secondary, #64748b);
+		text-decoration: none;
+		transition: all 0.15s;
+		white-space: nowrap;
+	}
+
+	.dropdown-link:hover {
+		color: var(--text-primary, #1f2937);
+		background: var(--surface-primary, #f8fafc);
+	}
+
+	.dropdown-link.active {
+		color: var(--accent-primary, #0ea5e9);
+		background: var(--accent-primary-light, #e0f2fe);
+	}
+
 	.nav-button {
 		padding: 0.375rem 0.625rem;
 		font-size: 0.8125rem;
@@ -486,6 +689,63 @@
 		margin-bottom: 0.5rem;
 	}
 
+	/* Mobile accordion sections */
+	.mobile-section {
+		border-bottom: 1px solid var(--border-subtle, #e2e8f0);
+	}
+
+	.mobile-section:last-child {
+		border-bottom: none;
+	}
+
+	.mobile-section-toggle {
+		display: flex;
+		align-items: center;
+		justify-content: space-between;
+		width: 100%;
+		padding: 0.75rem 1.25rem;
+		font-size: 0.75rem;
+		font-weight: 600;
+		text-transform: uppercase;
+		letter-spacing: 0.05em;
+		color: var(--text-secondary, #64748b);
+		background: none;
+		border: none;
+		cursor: pointer;
+		transition: all 0.15s;
+	}
+
+	.mobile-section-toggle:hover {
+		background: var(--surface-primary, #f8fafc);
+		color: var(--text-primary, #1f2937);
+	}
+
+	.mobile-section-toggle.active {
+		color: var(--accent-primary, #0ea5e9);
+	}
+
+	.accordion-chevron {
+		font-size: 0.625rem;
+		transition: transform 0.2s;
+	}
+
+	.accordion-chevron.open {
+		transform: rotate(180deg);
+	}
+
+	.mobile-section-links {
+		padding-bottom: 0.375rem;
+	}
+
+	.mobile-section-links .mobile-nav-link {
+		padding-left: 2rem;
+		font-size: 0.875rem;
+	}
+
+	.mobile-standalone-link {
+		border-bottom: 1px solid var(--border-subtle, #e2e8f0);
+	}
+
 	.mobile-nav-link {
 		display: flex;
 		align-items: center;
@@ -527,13 +787,21 @@
 	}
 
 	@keyframes fadeIn {
-		from { opacity: 0; }
+		from {
-		to { opacity: 1; }
+			opacity: 0;
+		}
+		to {
+			opacity: 1;
+		}
 	}
 
 	@keyframes slideInLeft {
-		from { transform: translateX(-100%); }
+		from {
-		to { transform: translateX(0); }
+			transform: translateX(-100%);
+		}
+		to {
+			transform: translateX(0);
+		}
 	}
 
 	.spinner {