diff --git a/frontend/src/components/admin/AdminSidebar.vue b/frontend/src/components/admin/AdminSidebar.vue
index 1a8c040..42d6138 100644
--- a/frontend/src/components/admin/AdminSidebar.vue
+++ b/frontend/src/components/admin/AdminSidebar.vue
@@ -61,7 +61,7 @@
         <button
           @click="signOut"
           aria-label="Sign out"
-          class="text-gray-400 hover:text-gray-600 transition-colors"
+          class="text-gray-400 hover:text-gray-600 active:text-gray-800 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1 rounded"
         >
           <AppIcon name="logout" class="w-4 h-4" />
         </button>
@@ -86,7 +86,7 @@ async function signOut() {
 
 <style scoped>
 .nav-link {
-  @apply flex items-center px-3 py-2 rounded-lg text-gray-600 hover:bg-gray-100 hover:text-gray-900 transition-colors text-sm font-medium;
+  @apply flex items-center px-3 py-2 rounded-lg text-gray-600 hover:bg-gray-100 hover:text-gray-900 active:bg-gray-200 transition-colors text-sm font-medium focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1;
 }
 .nav-link-active {
   @apply bg-indigo-50 text-indigo-700;
diff --git a/frontend/src/components/auth/BackupCodesDisplay.vue b/frontend/src/components/auth/BackupCodesDisplay.vue
index e11b4d6..80cf5b2 100644
--- a/frontend/src/components/auth/BackupCodesDisplay.vue
+++ b/frontend/src/components/auth/BackupCodesDisplay.vue
@@ -1,7 +1,7 @@
 <template>
   <div class="space-y-4">
     <div>
-      <h3 class="text-xl font-semibold text-gray-900 mb-1">Save your backup codes</h3>
+      <h3 class="text-lg font-semibold text-gray-900 mb-1">Save your backup codes</h3>
       <p class="text-sm text-gray-500">
         Store these codes somewhere safe. Each can only be used once if you lose access to your authenticator app.
       </p>
@@ -22,7 +22,7 @@
     <button
       type="button"
       @click="copyAll"
-      class="flex items-center gap-2 text-sm font-semibold text-indigo-600 hover:text-indigo-700 transition-colors"
+      class="flex items-center gap-2 text-sm font-semibold text-indigo-600 hover:text-indigo-700 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1 rounded"
     >
       <!-- Clipboard icon -->
       <svg class="w-4 h-4" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor">
@@ -49,7 +49,7 @@
       type="button"
       @click="acknowledged && $emit('acknowledged')"
       :disabled="!acknowledged"
-      class="w-full px-6 py-3 bg-indigo-600 text-white rounded-lg text-sm font-semibold hover:bg-indigo-700 transition-colors min-h-[44px]"
+      class="w-full px-6 py-3 bg-indigo-600 text-white rounded-lg text-sm font-semibold hover:bg-indigo-700 active:bg-indigo-800 transition-colors min-h-[44px] focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
       :class="!acknowledged ? 'opacity-50 cursor-not-allowed' : ''"
     >
       Enable two-factor authentication
diff --git a/frontend/src/components/cloud/CloudCredentialModal.vue b/frontend/src/components/cloud/CloudCredentialModal.vue
index c8672af..48f5aee 100644
--- a/frontend/src/components/cloud/CloudCredentialModal.vue
+++ b/frontend/src/components/cloud/CloudCredentialModal.vue
@@ -8,13 +8,13 @@
     <div data-test="cloud-credential-modal-panel" class="bg-white rounded-xl shadow-xl w-full max-w-md p-6 max-h-[90vh] overflow-y-auto">
       <!-- Header -->
       <div class="flex items-center justify-between mb-5">
-        <h3 class="text-xl font-semibold text-gray-900">
+        <h3 class="text-lg font-semibold text-gray-900">
           {{ existing ? 'Edit' : 'Connect' }} {{ provider?.label }}
         </h3>
         <button
           @click="close"
           aria-label="Close modal"
-          class="text-gray-400 hover:text-gray-600 transition-colors"
+          class="text-gray-400 hover:text-gray-600 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1 rounded"
         >
           <AppIcon name="x" class="w-5 h-5" />
         </button>
diff --git a/frontend/src/components/documents/DocumentCard.vue b/frontend/src/components/documents/DocumentCard.vue
index 5e6f54f..0e03bbb 100644
--- a/frontend/src/components/documents/DocumentCard.vue
+++ b/frontend/src/components/documents/DocumentCard.vue
@@ -62,7 +62,7 @@
             ref="pickerTriggerEl"
             @click.stop="toggleFolderPicker"
             aria-label="Move to folder"
-            class="min-h-[44px] min-w-[44px] flex items-center justify-center p-2 rounded-md text-gray-400 hover:text-indigo-600 hover:bg-indigo-50 transition-colors"
+            class="min-h-[44px] min-w-[44px] flex items-center justify-center p-2 rounded-md text-gray-400 hover:text-indigo-600 hover:bg-indigo-50 active:bg-indigo-100 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
           >
             <AppIcon name="folderMove" class="w-4 h-4" />
           </button>
@@ -71,7 +71,7 @@
         <button
           @click.stop="openShareModal"
           aria-label="Share document"
-          class="min-h-[44px] min-w-[44px] flex items-center justify-center p-2 rounded-md text-gray-400 hover:text-indigo-600 hover:bg-indigo-50 transition-colors"
+          class="min-h-[44px] min-w-[44px] flex items-center justify-center p-2 rounded-md text-gray-400 hover:text-indigo-600 hover:bg-indigo-50 active:bg-indigo-100 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
         >
           <AppIcon name="share" class="w-4 h-4" />
         </button>
@@ -98,13 +98,13 @@
       @click.stop
     >
       <button
-        class="w-full text-left px-3 py-2 text-sm text-gray-600 hover:bg-gray-50"
+        class="w-full text-left px-3 py-2 text-sm text-gray-600 hover:bg-gray-50 active:bg-gray-100 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-inset focus-visible:ring-indigo-500"
         @click.stop="moveToFolder(null)"
       >Root (no folder)</button>
       <button
         v-for="folder in allFolders"
         :key="folder.id"
-        class="w-full text-left px-3 py-2 text-sm text-gray-700 hover:bg-indigo-50 hover:text-indigo-600 truncate"
+        class="w-full text-left px-3 py-2 text-sm text-gray-700 hover:bg-indigo-50 hover:text-indigo-600 active:bg-indigo-100 truncate focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-inset focus-visible:ring-indigo-500"
         @click.stop="moveToFolder(folder.id)"
       >{{ folder.name }}</button>
       <p v-if="!allFolders.length" class="px-3 py-2 text-xs text-gray-400">No folders yet</p>
diff --git a/frontend/src/components/layout/AppSidebar.vue b/frontend/src/components/layout/AppSidebar.vue
index e5fc451..eeed7f0 100644
--- a/frontend/src/components/layout/AppSidebar.vue
+++ b/frontend/src/components/layout/AppSidebar.vue
@@ -36,7 +36,7 @@
         <div class="flex items-center gap-0.5">
           <button
             @click="foldersExpanded = !foldersExpanded"
-            class="p-1 rounded hover:bg-gray-100 text-gray-400 hover:text-gray-600 transition-colors shrink-0"
+            class="p-1 rounded hover:bg-gray-100 active:bg-gray-200 text-gray-400 hover:text-gray-600 transition-colors shrink-0 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
             :title="foldersExpanded ? 'Collapse folders' : 'Expand folders'"
           >
             <AppIcon
@@ -60,7 +60,7 @@
           <div v-if="loadingRoots" class="pl-7 py-1 space-y-1">
             <div v-for="n in 3" :key="`sk-f-${n}`" class="flex items-center gap-2 py-1">
               <div class="w-4 h-4 bg-gray-100 rounded animate-pulse shrink-0"></div>
-              <div class="h-3 bg-gray-100 rounded animate-pulse" :style="{ width: (50 + n * 15) + 'px' }"></div>
+              <div class="h-3 bg-gray-100 rounded animate-pulse" :class="n === 1 ? 'w-12' : n === 2 ? 'w-16' : 'w-20'"></div>
             </div>
           </div>
           <EmptyState
@@ -83,7 +83,7 @@
         <div class="flex items-center gap-0.5">
           <button
             @click="cloudExpanded = !cloudExpanded"
-            class="p-1 rounded hover:bg-gray-100 text-gray-400 hover:text-gray-600 transition-colors shrink-0"
+            class="p-1 rounded hover:bg-gray-100 active:bg-gray-200 text-gray-400 hover:text-gray-600 transition-colors shrink-0 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
             :title="cloudExpanded ? 'Collapse cloud storage' : 'Expand cloud storage'"
           >
             <AppIcon
@@ -107,7 +107,7 @@
           <div v-if="loadingCloudConnections" class="pl-7 py-1 space-y-1">
             <div v-for="n in 3" :key="`sk-c-${n}`" class="flex items-center gap-2 py-1">
               <div class="w-4 h-4 bg-gray-100 rounded animate-pulse shrink-0"></div>
-              <div class="h-3 bg-gray-100 rounded animate-pulse" :style="{ width: (50 + n * 15) + 'px' }"></div>
+              <div class="h-3 bg-gray-100 rounded animate-pulse" :class="n === 1 ? 'w-12' : n === 2 ? 'w-16' : 'w-20'"></div>
             </div>
           </div>
           <EmptyState
@@ -135,7 +135,7 @@
         <div v-if="topicsStore.loading" class="px-3 py-1 space-y-1">
           <div v-for="n in 3" :key="`sk-t-${n}`" class="flex items-center gap-2 py-1">
             <div class="w-4 h-4 bg-gray-100 rounded animate-pulse shrink-0"></div>
-            <div class="h-3 bg-gray-100 rounded animate-pulse" :style="{ width: (50 + n * 15) + 'px' }"></div>
+            <div class="h-3 bg-gray-100 rounded animate-pulse" :class="n === 1 ? 'w-12' : n === 2 ? 'w-16' : 'w-20'"></div>
           </div>
         </div>
         <EmptyState
@@ -192,7 +192,7 @@
         <button
           @click="signOut"
           aria-label="Sign out"
-          class="text-gray-400 hover:text-gray-600 transition-colors"
+          class="text-gray-400 hover:text-gray-600 active:text-gray-800 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1 rounded"
         >
           <AppIcon name="logout" class="w-4 h-4" />
         </button>
@@ -257,7 +257,7 @@ async function signOut() {
 
 <style scoped>
 .nav-link {
-  @apply flex items-center px-3 py-2 rounded-lg text-gray-600 hover:bg-gray-100 hover:text-gray-900 transition-colors text-sm font-medium;
+  @apply flex items-center px-3 py-2 rounded-lg text-gray-600 hover:bg-gray-100 hover:text-gray-900 active:bg-gray-200 transition-colors text-sm font-medium focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1;
 }
 .nav-link-active {
   @apply bg-indigo-50 text-indigo-700;
diff --git a/frontend/src/components/layout/__tests__/AppSidebar.visual.test.js b/frontend/src/components/layout/__tests__/AppSidebar.visual.test.js
new file mode 100644
index 0000000..db54e03
--- /dev/null
+++ b/frontend/src/components/layout/__tests__/AppSidebar.visual.test.js
@@ -0,0 +1,209 @@
+/**
+ * VISUAL-01 / VISUAL-03 / VISUAL-04: Visual consistency invariants for AppSidebar
+ *
+ * Tests that:
+ * 1. Skeleton items use Tailwind width classes, not data-driven inline styles (VISUAL-01)
+ * 2. Nav-link buttons have focus-visible ring classes for keyboard accessibility (VISUAL-04)
+ * 3. Expand/collapse toggle buttons have focus-visible ring classes (VISUAL-04)
+ */
+import { describe, it, expect, beforeEach, vi } from 'vitest'
+import { mount, flushPromises } from '@vue/test-utils'
+import { setActivePinia, createPinia } from 'pinia'
+import { createRouter, createMemoryHistory } from 'vue-router'
+
+vi.mock('../../../api/client.js', () => ({
+  listFolders: vi.fn().mockResolvedValue({ items: [] }),
+  getSharedWithMe: vi.fn().mockResolvedValue([]),
+  listCloudConnections: vi.fn().mockResolvedValue({ items: [] }),
+  listTopics: vi.fn().mockResolvedValue({ topics: [] }),
+  getMyQuota: vi.fn().mockResolvedValue({ used_bytes: 0, limit_bytes: 104857600 }),
+}))
+
+const STUBS = {
+  FolderTreeItem: true,
+  CloudProviderTreeItem: true,
+  QuotaBar: true,
+  RouterLink: true,
+  EmptyState: true,
+}
+
+function makeRouter() {
+  return createRouter({
+    history: createMemoryHistory(),
+    routes: [
+      { path: '/', component: { template: '<div/>' } },
+      { path: '/settings', component: { template: '<div/>' } },
+      { path: '/topics', component: { template: '<div/>' } },
+      { path: '/shared', component: { template: '<div/>' } },
+      { path: '/cloud', component: { template: '<div/>' } },
+      { path: '/admin', component: { template: '<div/>' } },
+    ],
+  })
+}
+
+describe('VISUAL-01: Sidebar skeleton items use class-based widths (no inline style)', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    vi.resetModules()
+  })
+
+  it('skeleton width divs have w-12/w-16/w-20 class, not style attribute', async () => {
+    vi.doMock('../../../api/client.js', () => ({
+      listFolders: vi.fn().mockResolvedValue({ items: [] }),
+      getSharedWithMe: vi.fn().mockResolvedValue([]),
+      listCloudConnections: vi.fn().mockReturnValue(new Promise(() => {})),
+      listTopics: vi.fn().mockResolvedValue({ topics: [] }),
+      getMyQuota: vi.fn().mockResolvedValue({ used_bytes: 0, limit_bytes: 104857600 }),
+    }))
+
+    setActivePinia(createPinia())
+    const { useCloudConnectionsStore } = await import('../../../stores/cloudConnections.js')
+    const cloudStore = useCloudConnectionsStore()
+    cloudStore.loading = true
+    cloudStore.connections = []
+
+    const router = makeRouter()
+    await router.push('/')
+    await router.isReady()
+
+    const AppSidebar = (await import('../AppSidebar.vue')).default
+    const wrapper = mount(AppSidebar, {
+      global: { plugins: [router], stubs: STUBS },
+    })
+
+    cloudStore.loading = true
+    await wrapper.vm.$nextTick()
+
+    // All skeleton width divs should use Tailwind class, not inline style width
+    const skeletonWidthDivs = wrapper
+      .findAll('.animate-pulse')
+      .filter(el => {
+        const cls = el.classes()
+        return cls.includes('h-3') // width skeleton lines (not icon squares)
+      })
+
+    expect(skeletonWidthDivs.length).toBeGreaterThan(0)
+
+    for (const el of skeletonWidthDivs) {
+      // Must NOT have an inline style with width
+      const style = el.attributes('style') || ''
+      expect(style).not.toMatch(/width\s*:/)
+
+      // Must have a Tailwind width class (w-12, w-16, or w-20)
+      const cls = el.classes().join(' ')
+      const hasWidthClass = /\bw-\d+\b/.test(cls)
+      expect(hasWidthClass).toBe(true)
+    }
+
+    wrapper.unmount()
+  })
+
+  it('topics skeleton items use width classes, not inline style', async () => {
+    vi.doMock('../../../api/client.js', () => ({
+      listFolders: vi.fn().mockResolvedValue({ items: [] }),
+      getSharedWithMe: vi.fn().mockResolvedValue([]),
+      listCloudConnections: vi.fn().mockResolvedValue({ items: [] }),
+      listTopics: vi.fn().mockResolvedValue({ topics: [] }),
+      getMyQuota: vi.fn().mockResolvedValue({ used_bytes: 0, limit_bytes: 104857600 }),
+    }))
+
+    setActivePinia(createPinia())
+    const { useTopicsStore } = await import('../../../stores/topics.js')
+    const topicsStore = useTopicsStore()
+    topicsStore.loading = true
+    topicsStore.topics = []
+
+    const router = makeRouter()
+    await router.push('/')
+    await router.isReady()
+
+    const AppSidebar = (await import('../AppSidebar.vue')).default
+    const wrapper = mount(AppSidebar, {
+      global: { plugins: [router], stubs: STUBS },
+    })
+
+    topicsStore.loading = true
+    await wrapper.vm.$nextTick()
+
+    const skeletonWidthDivs = wrapper
+      .findAll('.animate-pulse')
+      .filter(el => el.classes().includes('h-3'))
+
+    expect(skeletonWidthDivs.length).toBeGreaterThan(0)
+
+    for (const el of skeletonWidthDivs) {
+      const style = el.attributes('style') || ''
+      expect(style).not.toMatch(/width\s*:/)
+    }
+
+    wrapper.unmount()
+  })
+})
+
+describe('VISUAL-04: Sidebar interactive elements have focus-visible ring classes', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    vi.resetModules()
+  })
+
+  it('expand/collapse folder toggle button has focus-visible:ring-2', async () => {
+    vi.doMock('../../../api/client.js', () => ({
+      listFolders: vi.fn().mockResolvedValue({ items: [] }),
+      getSharedWithMe: vi.fn().mockResolvedValue([]),
+      listCloudConnections: vi.fn().mockResolvedValue({ items: [] }),
+      listTopics: vi.fn().mockResolvedValue({ topics: [] }),
+      getMyQuota: vi.fn().mockResolvedValue({ used_bytes: 0, limit_bytes: 104857600 }),
+    }))
+
+    setActivePinia(createPinia())
+    const router = makeRouter()
+    await router.push('/')
+    await router.isReady()
+
+    const AppSidebar = (await import('../AppSidebar.vue')).default
+    const wrapper = mount(AppSidebar, {
+      global: { plugins: [router], stubs: STUBS },
+    })
+    await flushPromises()
+
+    const toggleBtn = wrapper.find('button[title="Expand folders"]')
+    expect(toggleBtn.exists()).toBe(true)
+    const cls = toggleBtn.attributes('class') || ''
+    expect(cls).toContain('focus-visible:ring-2')
+    expect(cls).toContain('focus-visible:ring-indigo-500')
+
+    wrapper.unmount()
+  })
+
+  it('sign-out button has focus-visible:ring-2', async () => {
+    vi.doMock('../../../api/client.js', () => ({
+      listFolders: vi.fn().mockResolvedValue({ items: [] }),
+      getSharedWithMe: vi.fn().mockResolvedValue([]),
+      listCloudConnections: vi.fn().mockResolvedValue({ items: [] }),
+      listTopics: vi.fn().mockResolvedValue({ topics: [] }),
+      getMyQuota: vi.fn().mockResolvedValue({ used_bytes: 0, limit_bytes: 104857600 }),
+    }))
+
+    setActivePinia(createPinia())
+    const { useAuthStore } = await import('../../../stores/auth.js')
+    const authStore = useAuthStore()
+    authStore.user = { email: 'test@example.com', role: 'user' }
+
+    const router = makeRouter()
+    await router.push('/')
+    await router.isReady()
+
+    const AppSidebar = (await import('../AppSidebar.vue')).default
+    const wrapper = mount(AppSidebar, {
+      global: { plugins: [router], stubs: STUBS },
+    })
+    await flushPromises()
+
+    const signOutBtn = wrapper.find('button[aria-label="Sign out"]')
+    expect(signOutBtn.exists()).toBe(true)
+    const cls = signOutBtn.attributes('class') || ''
+    expect(cls).toContain('focus-visible:ring-2')
+
+    wrapper.unmount()
+  })
+})
diff --git a/frontend/src/components/settings/SettingsAccountTab.vue b/frontend/src/components/settings/SettingsAccountTab.vue
index aac0357..18e4226 100644
--- a/frontend/src/components/settings/SettingsAccountTab.vue
+++ b/frontend/src/components/settings/SettingsAccountTab.vue
@@ -3,7 +3,7 @@
 
     <!-- 1. Account information -->
     <section class="bg-white border border-gray-200 rounded-xl p-6">
-      <h3 class="font-semibold text-gray-800 mb-4">Account information</h3>
+      <h3 class="text-sm font-semibold text-gray-800 mb-4">Account information</h3>
       <div class="space-y-2 text-sm text-gray-700">
         <div><span class="text-gray-500">Email:</span> {{ authStore.user?.email }}</div>
         <div><span class="text-gray-500">Username:</span> @{{ authStore.user?.handle }}</div>
@@ -23,7 +23,7 @@
 
     <!-- 2. Two-factor authentication -->
     <section class="bg-white border border-gray-200 rounded-xl p-6">
-      <h3 class="font-semibold text-gray-800 mb-4">Two-factor authentication</h3>
+      <h3 class="text-sm font-semibold text-gray-800 mb-4">Two-factor authentication</h3>
 
       <!-- TOTP enabled: show status + disable option -->
       <template v-if="authStore.user?.totp_enabled">
@@ -39,7 +39,7 @@
           <button
             type="button"
             @click="confirmDisable2fa = true"
-            class="text-sm px-4 py-2 border border-red-300 text-red-600 rounded-lg hover:bg-red-50 transition-colors"
+            class="text-sm px-4 py-2 border border-red-300 text-red-600 rounded-lg hover:bg-red-50 active:bg-red-100 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-red-500 focus-visible:ring-offset-1"
           >
             Disable 2FA
           </button>
@@ -64,7 +64,7 @@
 
     <!-- 3. Change password -->
     <section class="bg-white border border-gray-200 rounded-xl p-6">
-      <h3 class="font-semibold text-gray-800 mb-4">Change password</h3>
+      <h3 class="text-sm font-semibold text-gray-800 mb-4">Change password</h3>
 
       <form @submit.prevent="changePassword" class="space-y-4 max-w-sm">
         <div>
@@ -125,13 +125,13 @@
 
     <!-- 4. Sessions — sign out all devices -->
     <section class="bg-white border border-gray-200 rounded-xl p-6">
-      <h3 class="font-semibold text-gray-800 mb-4">Sessions</h3>
+      <h3 class="text-sm font-semibold text-gray-800 mb-4">Sessions</h3>
 
       <template v-if="!confirmSignOutAll">
         <button
           type="button"
           @click="confirmSignOutAll = true"
-          class="text-sm px-4 py-2 border border-red-300 text-red-600 rounded-lg hover:bg-red-50 transition-colors"
+          class="text-sm px-4 py-2 border border-red-300 text-red-600 rounded-lg hover:bg-red-50 active:bg-red-100 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-red-500 focus-visible:ring-offset-1"
         >
           Sign out all devices
         </button>
diff --git a/frontend/src/components/settings/SettingsAiTab.vue b/frontend/src/components/settings/SettingsAiTab.vue
index dcf04f6..49c62ad 100644
--- a/frontend/src/components/settings/SettingsAiTab.vue
+++ b/frontend/src/components/settings/SettingsAiTab.vue
@@ -1,6 +1,6 @@
 <template>
   <section class="bg-white border border-gray-200 rounded-xl p-6">
-    <h3 class="text-xl font-semibold text-gray-800 mb-2">AI configuration</h3>
+    <h3 class="text-lg font-semibold text-gray-800 mb-2">AI configuration</h3>
     <p class="text-sm text-gray-600">
       AI provider and model are managed by your administrator. Contact your admin
       to request changes to which AI provider is used for your documents.
diff --git a/frontend/src/components/settings/SettingsCloudTab.vue b/frontend/src/components/settings/SettingsCloudTab.vue
index 45d3de6..5fe3b31 100644
--- a/frontend/src/components/settings/SettingsCloudTab.vue
+++ b/frontend/src/components/settings/SettingsCloudTab.vue
@@ -1,7 +1,7 @@
 <template>
   <div>
     <section class="bg-white border border-gray-200 rounded-xl p-6">
-      <h3 class="text-xl font-semibold text-gray-800 mb-1">Cloud Storage</h3>
+      <h3 class="text-lg font-semibold text-gray-800 mb-1">Cloud Storage</h3>
       <p class="text-sm text-gray-600 mb-5">Connect a cloud storage provider to use as a document destination.</p>
 
       <!-- Loading state -->
@@ -52,7 +52,7 @@
               <template v-if="!connectionFor(provider.key)">
                 <button
                   @click="handleConnect(provider)"
-                  class="bg-indigo-600 hover:bg-indigo-700 text-white text-sm font-semibold px-4 py-2 rounded-lg transition-colors min-w-[160px]"
+                  class="bg-indigo-600 hover:bg-indigo-700 active:bg-indigo-800 text-white text-sm font-semibold px-4 py-2 rounded-lg transition-colors min-w-[160px] focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
                 >
                   Connect {{ provider.label }}
                 </button>
@@ -63,14 +63,14 @@
                 <button
                   v-if="!OAUTH_PROVIDERS.has(provider.key) && confirmRemoveId !== connectionFor(provider.key)?.id"
                   @click="handleEdit(provider)"
-                  class="text-sm px-3 py-2 border border-gray-300 rounded-lg hover:bg-gray-50 text-gray-700 transition-colors"
+                  class="text-sm px-3 py-2 border border-gray-300 rounded-lg hover:bg-gray-50 active:bg-gray-100 text-gray-700 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
                 >
                   Edit
                 </button>
                 <button
                   v-if="confirmRemoveId !== connectionFor(provider.key)?.id"
                   @click="confirmRemoveId = connectionFor(provider.key)?.id"
-                  class="text-sm px-4 py-2 border border-gray-300 rounded-lg hover:bg-gray-50 text-gray-700 transition-colors"
+                  class="text-sm px-4 py-2 border border-gray-300 rounded-lg hover:bg-gray-50 active:bg-gray-100 text-gray-700 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
                 >
                   Remove {{ provider.label }}
                 </button>
@@ -90,14 +90,14 @@
               <template v-else-if="connectionFor(provider.key)?.status === 'REQUIRES_REAUTH'">
                 <button
                   @click="handleConnect(provider)"
-                  class="bg-indigo-600 hover:bg-indigo-700 text-white text-sm font-semibold px-4 py-2 rounded-lg transition-colors min-w-[160px]"
+                  class="bg-indigo-600 hover:bg-indigo-700 active:bg-indigo-800 text-white text-sm font-semibold px-4 py-2 rounded-lg transition-colors min-w-[160px] focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
                 >
                   Reconnect {{ provider.label }}
                 </button>
                 <button
                   v-if="confirmRemoveId !== connectionFor(provider.key)?.id"
                   @click="confirmRemoveId = connectionFor(provider.key)?.id"
-                  class="text-sm px-3 py-2 text-gray-500 hover:text-gray-700 transition-colors"
+                  class="text-sm px-3 py-2 text-gray-500 hover:text-gray-700 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1 rounded"
                 >
                   Remove {{ provider.label }}
                 </button>
@@ -118,14 +118,14 @@
                 <button
                   v-if="!OAUTH_PROVIDERS.has(provider.key) && confirmRemoveId !== connectionFor(provider.key)?.id"
                   @click="handleEdit(provider)"
-                  class="text-sm px-3 py-2 border border-gray-300 rounded-lg hover:bg-gray-50 text-gray-700 transition-colors"
+                  class="text-sm px-3 py-2 border border-gray-300 rounded-lg hover:bg-gray-50 active:bg-gray-100 text-gray-700 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
                 >
                   Edit
                 </button>
                 <button
                   v-if="confirmRemoveId !== connectionFor(provider.key)?.id"
                   @click="confirmRemoveId = connectionFor(provider.key)?.id"
-                  class="text-sm px-4 py-2 border border-red-300 rounded-lg hover:bg-red-50 text-red-600 transition-colors"
+                  class="text-sm px-4 py-2 border border-red-300 rounded-lg hover:bg-red-50 active:bg-red-100 text-red-600 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-red-500 focus-visible:ring-offset-1"
                 >
                   Remove {{ provider.label }}
                 </button>
@@ -162,7 +162,7 @@
         <button
           v-if="!showDisconnectAll"
           @click="showDisconnectAll = true"
-          class="text-sm text-red-600 hover:text-red-700 hover:underline font-medium transition-colors"
+          class="text-sm text-red-600 hover:text-red-700 hover:underline font-medium transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-red-500 focus-visible:ring-offset-1 rounded"
         >
           Disconnect all cloud storage
         </button>
diff --git a/frontend/src/components/settings/SettingsPreferencesTab.vue b/frontend/src/components/settings/SettingsPreferencesTab.vue
index f7b5f33..207afb8 100644
--- a/frontend/src/components/settings/SettingsPreferencesTab.vue
+++ b/frontend/src/components/settings/SettingsPreferencesTab.vue
@@ -1,6 +1,6 @@
 <template>
   <section class="bg-white border border-gray-200 rounded-xl p-6">
-    <h3 class="text-xl font-semibold text-gray-800 mb-2">Document Preferences</h3>
+    <h3 class="text-lg font-semibold text-gray-800 mb-2">Document Preferences</h3>
     <p class="text-sm text-gray-600 mb-4">Choose how PDF documents open when you click on them.</p>
 
     <div class="space-y-3">
diff --git a/frontend/src/components/storage/StorageBrowser.vue b/frontend/src/components/storage/StorageBrowser.vue
index db73992..13fb1bf 100644
--- a/frontend/src/components/storage/StorageBrowser.vue
+++ b/frontend/src/components/storage/StorageBrowser.vue
@@ -19,7 +19,7 @@
           <button
             v-if="mode === 'local'"
             @click="$emit('new-folder')"
-            class="flex items-center gap-1.5 px-3 py-1.5 text-sm font-medium text-indigo-600 border border-indigo-200 hover:bg-indigo-50 rounded-lg transition-colors"
+            class="flex items-center gap-1.5 px-3 py-1.5 text-sm font-medium text-indigo-600 border border-indigo-200 hover:bg-indigo-50 active:bg-indigo-100 rounded-lg transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
           >
             <AppIcon name="plus" class="w-4 h-4" />
             New folder
@@ -100,11 +100,11 @@
           <div class="flex justify-end gap-0.5 opacity-0 group-hover:opacity-100 transition-opacity" @click.stop>
             <template v-if="mode === 'local'">
               <button @click.stop="startRename(folder)" title="Rename"
-                class="p-1.5 md:p-1.5 min-w-[36px] min-h-[36px] md:min-w-0 md:min-h-0 rounded hover:bg-gray-200 text-gray-400 hover:text-gray-700 transition-colors flex items-center justify-center">
+                class="p-1.5 md:p-1.5 min-w-[36px] min-h-[36px] md:min-w-0 md:min-h-0 rounded hover:bg-gray-200 active:bg-gray-300 text-gray-400 hover:text-gray-700 transition-colors flex items-center justify-center focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1">
                 <AppIcon name="pencil" class="w-3.5 h-3.5" />
               </button>
               <button @click.stop="$emit('folder-delete', folder)" title="Delete folder"
-                class="p-1.5 md:p-1.5 min-w-[36px] min-h-[36px] md:min-w-0 md:min-h-0 rounded hover:bg-red-50 text-gray-400 hover:text-red-500 transition-colors flex items-center justify-center">
+                class="p-1.5 md:p-1.5 min-w-[36px] min-h-[36px] md:min-w-0 md:min-h-0 rounded hover:bg-red-50 active:bg-red-100 text-gray-400 hover:text-red-500 transition-colors flex items-center justify-center focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-red-500 focus-visible:ring-offset-1">
                 <AppIcon name="trash" class="w-3.5 h-3.5" />
               </button>
             </template>
@@ -147,20 +147,20 @@
           <div class="flex justify-end gap-0.5 opacity-0 group-hover:opacity-100 transition-opacity" @click.stop>
             <template v-if="mode === 'local'">
               <button @click.stop="$emit('file-share', file)" title="Share"
-                class="p-1.5 min-w-[36px] min-h-[36px] md:min-w-0 md:min-h-0 rounded hover:bg-gray-200 text-gray-400 hover:text-gray-700 transition-colors flex items-center justify-center">
+                class="p-1.5 min-w-[36px] min-h-[36px] md:min-w-0 md:min-h-0 rounded hover:bg-gray-200 active:bg-gray-300 text-gray-400 hover:text-gray-700 transition-colors flex items-center justify-center focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1">
                 <AppIcon name="share" class="w-3.5 h-3.5" />
               </button>
               <div class="relative">
                 <button
                   @click.stop="openFolderPicker(file.id, $event)"
                   title="Move to folder"
-                  class="p-1.5 min-w-[36px] min-h-[36px] md:min-w-0 md:min-h-0 rounded hover:bg-gray-200 text-gray-400 hover:text-gray-700 transition-colors flex items-center justify-center"
+                  class="p-1.5 min-w-[36px] min-h-[36px] md:min-w-0 md:min-h-0 rounded hover:bg-gray-200 active:bg-gray-300 text-gray-400 hover:text-gray-700 transition-colors flex items-center justify-center focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
                 >
                   <AppIcon name="folderMove" class="w-3.5 h-3.5" />
                 </button>
               </div>
               <button @click.stop="$emit('file-delete', file.id)" title="Delete"
-                class="p-1.5 min-w-[36px] min-h-[36px] md:min-w-0 md:min-h-0 rounded hover:bg-red-50 text-gray-400 hover:text-red-500 transition-colors flex items-center justify-center">
+                class="p-1.5 min-w-[36px] min-h-[36px] md:min-w-0 md:min-h-0 rounded hover:bg-red-50 active:bg-red-100 text-gray-400 hover:text-red-500 transition-colors flex items-center justify-center focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-red-500 focus-visible:ring-offset-1">
                 <AppIcon name="trash" class="w-3.5 h-3.5" />
               </button>
             </template>
@@ -221,7 +221,7 @@
       @click.stop
     >
       <button
-        class="w-full text-left px-3 py-2 text-sm text-gray-600 hover:bg-gray-50"
+        class="w-full text-left px-3 py-2 text-sm text-gray-600 hover:bg-gray-50 active:bg-gray-100 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-inset focus-visible:ring-indigo-500"
         @click.stop="$emit('file-move', { fileId: folderPickerFileId, folderId: null }); folderPickerFileId = null"
       >
         Root (no folder)
@@ -229,7 +229,7 @@
       <button
         v-for="f in rootFolders"
         :key="f.id"
-        class="w-full text-left px-3 py-2 text-sm text-gray-700 hover:bg-indigo-50 hover:text-indigo-700 truncate"
+        class="w-full text-left px-3 py-2 text-sm text-gray-700 hover:bg-indigo-50 hover:text-indigo-700 active:bg-indigo-100 truncate focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-inset focus-visible:ring-indigo-500"
         @click.stop="$emit('file-move', { fileId: folderPickerFileId, folderId: f.id }); folderPickerFileId = null"
       >{{ f.name }}</button>
       <p v-if="!rootFolders.length" class="px-3 py-2 text-xs text-gray-400">No folders yet</p>
diff --git a/frontend/src/components/topics/TopicManager.vue b/frontend/src/components/topics/TopicManager.vue
index 4a0cd56..c4c352f 100644
--- a/frontend/src/components/topics/TopicManager.vue
+++ b/frontend/src/components/topics/TopicManager.vue
@@ -17,7 +17,7 @@
       />
       <button
         type="submit"
-        class="px-4 py-2 bg-indigo-600 text-white rounded-lg text-sm font-medium hover:bg-indigo-700 transition-colors"
+        class="px-4 py-2 bg-indigo-600 text-white rounded-lg text-sm font-medium hover:bg-indigo-700 active:bg-indigo-800 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
         :disabled="saving"
       >
         {{ saving ? 'Adding…' : 'Add' }}
@@ -50,8 +50,8 @@
             placeholder="Description"
             class="flex-1 border border-gray-300 rounded px-2 py-1 text-sm focus:outline-none focus:ring-2 focus:ring-indigo-400"
           />
-          <button @click="saveEdit(topic.id)" class="text-xs text-indigo-600 font-medium">Save</button>
-          <button @click="editing = null" class="text-xs text-gray-400">Cancel</button>
+          <button @click="saveEdit(topic.id)" class="text-xs text-indigo-600 font-medium hover:text-indigo-700 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1 rounded">Save</button>
+          <button @click="editing = null" class="text-xs text-gray-400 hover:text-gray-600 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1 rounded">Cancel</button>
         </div>
 
         <div v-else class="flex-1 min-w-0">
@@ -63,8 +63,8 @@
         </div>
 
         <div class="flex gap-2 shrink-0">
-          <button @click="startEdit(topic)" class="text-xs text-gray-500 hover:text-indigo-600">Edit</button>
-          <button @click="remove(topic)" class="text-xs text-gray-500 hover:text-red-500">Delete</button>
+          <button @click="startEdit(topic)" class="text-xs text-gray-500 hover:text-indigo-600 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1 rounded">Edit</button>
+          <button @click="remove(topic)" class="text-xs text-gray-500 hover:text-red-500 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-red-500 focus-visible:ring-offset-1 rounded">Delete</button>
         </div>
       </div>
 
diff --git a/frontend/src/views/DocumentView.vue b/frontend/src/views/DocumentView.vue
index 84fe3e0..a7f9454 100644
--- a/frontend/src/views/DocumentView.vue
+++ b/frontend/src/views/DocumentView.vue
@@ -1,7 +1,7 @@
 <template>
   <div class="p-8 max-w-4xl mx-auto">
     <!-- Back -->
-    <button @click="$router.back()" class="text-sm text-indigo-600 hover:underline mb-6 flex items-center gap-1">
+    <button @click="$router.back()" class="text-sm text-indigo-600 hover:underline mb-6 flex items-center gap-1 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1 rounded">
       ← Back
     </button>
 
@@ -12,7 +12,7 @@
       <!-- Header -->
       <div class="flex items-start justify-between gap-4 mb-6">
         <div>
-          <h2 class="text-2xl font-bold text-gray-900 break-all">{{ doc.original_name }}</h2>
+          <h2 class="text-2xl font-semibold text-gray-900 break-all">{{ doc.original_name }}</h2>
           <p class="text-sm text-gray-400 mt-1">
             Uploaded {{ formatDate(doc.created_at) }} · {{ formatSize(doc.size_bytes) }} · {{ doc.mime_type }}
           </p>
@@ -22,13 +22,13 @@
           <button
             v-if="isPdf"
             @click="openPdf"
-            class="text-sm px-3 py-1.5 bg-indigo-600 text-white rounded-lg hover:bg-indigo-700 transition-colors"
+            class="text-sm px-3 py-1.5 bg-indigo-600 text-white rounded-lg hover:bg-indigo-700 active:bg-indigo-800 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
           >
             {{ pdfOpenMode === 'in_app' ? 'Preview' : 'Open' }}
           </button>
           <button
             @click="confirmDelete"
-            class="text-sm text-red-500 hover:text-red-700"
+            class="text-sm text-red-500 hover:text-red-700 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-red-500 focus-visible:ring-offset-1 rounded"
           >Delete</button>
         </div>
       </div>
@@ -36,19 +36,19 @@
       <!-- Topics -->
       <div class="bg-white border border-gray-200 rounded-xl p-5 mb-5">
         <div class="flex items-center justify-between mb-3">
-          <h3 class="font-semibold text-gray-800">Topics</h3>
+          <h3 class="text-sm font-semibold text-gray-800">Topics</h3>
           <div class="flex gap-2">
             <button
               @click="reclassify"
               :disabled="classifying"
-              class="text-xs px-3 py-1.5 bg-indigo-600 text-white rounded-lg hover:bg-indigo-700 transition-colors disabled:opacity-50"
+              class="text-xs px-3 py-1.5 bg-indigo-600 text-white rounded-lg hover:bg-indigo-700 active:bg-indigo-800 transition-colors disabled:opacity-50 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
             >
               {{ classifying ? 'Classifying…' : 'Re-classify' }}
             </button>
             <button
               @click="suggestTopics"
               :disabled="suggesting"
-              class="text-xs px-3 py-1.5 border border-gray-300 text-gray-700 rounded-lg hover:bg-gray-50 transition-colors disabled:opacity-50"
+              class="text-xs px-3 py-1.5 border border-gray-300 text-gray-700 rounded-lg hover:bg-gray-50 active:bg-gray-100 transition-colors disabled:opacity-50 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
             >
               {{ suggesting ? 'Suggesting…' : 'Suggest Topics' }}
             </button>
@@ -97,7 +97,7 @@
 
       <!-- Extracted text -->
       <div class="bg-white border border-gray-200 rounded-xl p-5">
-        <h3 class="font-semibold text-gray-800 mb-3">Extracted Text</h3>
+        <h3 class="text-sm font-semibold text-gray-800 mb-3">Extracted Text</h3>
         <pre class="text-xs text-gray-600 whitespace-pre-wrap font-mono bg-gray-50 rounded-lg p-4 max-h-96 overflow-y-auto">{{ doc.extracted_text || '(no text extracted)' }}</pre>
       </div>
     </template>
@@ -132,11 +132,11 @@
         <div class="flex gap-2 justify-end">
           <button
             @click="cancelCloudDeleteWarning"
-            class="border border-gray-300 text-gray-700 text-sm px-4 py-2 rounded-lg hover:bg-gray-50 transition-colors"
+            class="border border-gray-300 text-gray-700 text-sm px-4 py-2 rounded-lg hover:bg-gray-50 active:bg-gray-100 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
           >Cancel</button>
           <button
             @click="confirmRemoveOnly"
-            class="bg-red-600 hover:bg-red-700 text-white text-sm px-4 py-2 rounded-lg transition-colors"
+            class="bg-red-600 hover:bg-red-700 active:bg-red-800 text-white text-sm px-4 py-2 rounded-lg transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-red-500 focus-visible:ring-offset-1"
           >Remove from app</button>
         </div>
       </div>
diff --git a/frontend/src/views/SettingsView.vue b/frontend/src/views/SettingsView.vue
index 46bc61a..7e830b3 100644
--- a/frontend/src/views/SettingsView.vue
+++ b/frontend/src/views/SettingsView.vue
@@ -18,7 +18,7 @@
       <button
         @click="oauthSuccessProvider = null"
         aria-label="Dismiss notification"
-        class="text-gray-400 hover:text-gray-600 shrink-0"
+        class="text-gray-400 hover:text-gray-600 shrink-0 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1 rounded"
       >
         <AppIcon name="x" class="w-4 h-4" />
       </button>
@@ -30,7 +30,7 @@
         v-for="tab in tabs"
         :key="tab.id"
         @click="activeTab = tab.id"
-        class="px-4 py-2 text-sm font-semibold border-b-2 transition-colors"
+        class="px-4 py-2 text-sm font-semibold border-b-2 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1 rounded-t"
         :class="activeTab === tab.id
           ? 'text-indigo-600 border-indigo-600'
           : 'text-gray-500 hover:text-gray-700 border-transparent'"
@@ -64,7 +64,7 @@
         <button
           @click="oauthError = null"
           aria-label="Dismiss error"
-          class="text-red-400 hover:text-red-600 shrink-0"
+          class="text-red-400 hover:text-red-600 shrink-0 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-red-500 focus-visible:ring-offset-1 rounded"
         >
           <AppIcon name="x" class="w-4 h-4" />
         </button>
diff --git a/frontend/src/views/SharedView.vue b/frontend/src/views/SharedView.vue
index 2f9ee0f..f5e66c6 100644
--- a/frontend/src/views/SharedView.vue
+++ b/frontend/src/views/SharedView.vue
@@ -2,7 +2,7 @@
   <div class="p-8 max-w-4xl mx-auto">
     <BreadcrumbBar :segments="[{ label: 'Shared with me' }]" :show-root="false" class="mb-4" />
 
-    <h2 class="text-2xl font-bold text-gray-900 mb-1">Shared with me</h2>
+    <h2 class="text-2xl font-semibold text-gray-900 mb-1">Shared with me</h2>
     <p class="text-gray-500 text-sm mb-6">Documents other users have shared with you.</p>
 
     <div v-if="loading" class="text-sm text-gray-400">Loading…</div>
diff --git a/frontend/src/views/TopicsView.vue b/frontend/src/views/TopicsView.vue
index faa4734..07b662b 100644
--- a/frontend/src/views/TopicsView.vue
+++ b/frontend/src/views/TopicsView.vue
@@ -3,7 +3,7 @@
     <!-- Header -->
     <div class="flex items-center justify-between mb-6">
       <div>
-        <h2 class="text-2xl font-bold text-gray-900">
+        <h2 class="text-2xl font-semibold text-gray-900">
           {{ activeTopic ? activeTopic : 'All Topics' }}
         </h2>
         <p class="text-gray-500 text-sm mt-0.5">
@@ -13,7 +13,7 @@
       <button
         v-if="activeTopic"
         @click="$router.push('/topics')"
-        class="text-sm text-indigo-600 hover:underline"
+        class="text-sm text-indigo-600 hover:underline focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1 rounded"
       >
         ← All Topics
       </button>
@@ -31,7 +31,7 @@
             v-for="topic in topicsStore.topics"
             :key="topic.id"
             :to="`/topics/${encodeURIComponent(topic.name)}`"
-            class="bg-white border border-gray-200 rounded-xl p-4 hover:border-indigo-300 hover:shadow-sm transition-all"
+            class="bg-white border border-gray-200 rounded-xl p-4 hover:border-indigo-300 hover:shadow-sm transition-all focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
           >
             <div class="flex items-center gap-2 mb-2">
               <span class="w-3 h-3 rounded-full" :style="{ backgroundColor: topic.color }"></span>
diff --git a/frontend/src/views/__tests__/typography.visual.test.js b/frontend/src/views/__tests__/typography.visual.test.js
new file mode 100644
index 0000000..c894e82
--- /dev/null
+++ b/frontend/src/views/__tests__/typography.visual.test.js
@@ -0,0 +1,171 @@
+/**
+ * VISUAL-01 / VISUAL-03: Typography normalization invariants
+ *
+ * Tests that page-level h2 headings use text-2xl font-semibold (not font-bold),
+ * and section-level h3 headings inside cards use text-sm or text-lg font-semibold (not text-xl).
+ */
+import { describe, it, expect, beforeEach, vi } from 'vitest'
+import { mount, flushPromises } from '@vue/test-utils'
+import { setActivePinia, createPinia } from 'pinia'
+import { createRouter, createMemoryHistory } from 'vue-router'
+
+vi.mock('../../api/client.js', () => ({
+  getSharedWithMe: vi.fn().mockResolvedValue([]),
+  listFolders: vi.fn().mockResolvedValue({ items: [] }),
+  getDocument: vi.fn().mockResolvedValue(null),
+  getMyPreferences: vi.fn().mockResolvedValue({ pdf_open_mode: 'new_tab' }),
+  listTopics: vi.fn().mockResolvedValue({ topics: [] }),
+  getMyQuota: vi.fn().mockResolvedValue({ used_bytes: 0, limit_bytes: 104857600 }),
+}))
+
+function makeRouter(extraRoutes = []) {
+  return createRouter({
+    history: createMemoryHistory(),
+    routes: [
+      { path: '/', component: { template: '<div/>' } },
+      { path: '/topics', component: { template: '<div/>' } },
+      { path: '/shared', component: { template: '<div/>' } },
+      { path: '/settings', component: { template: '<div/>' } },
+      ...extraRoutes,
+    ],
+  })
+}
+
+describe('VISUAL-03: SharedView page title uses font-semibold (not font-bold)', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    vi.resetModules()
+  })
+
+  it('h2 has text-2xl font-semibold and not font-bold', async () => {
+    vi.doMock('../../api/client.js', () => ({
+      getSharedWithMe: vi.fn().mockResolvedValue([]),
+      listFolders: vi.fn().mockResolvedValue({ items: [] }),
+      getDocument: vi.fn().mockResolvedValue(null),
+      getMyPreferences: vi.fn().mockResolvedValue({ pdf_open_mode: 'new_tab' }),
+      listTopics: vi.fn().mockResolvedValue({ topics: [] }),
+      getMyQuota: vi.fn().mockResolvedValue({ used_bytes: 0, limit_bytes: 104857600 }),
+    }))
+
+    setActivePinia(createPinia())
+    const router = makeRouter()
+    await router.push('/shared')
+    await router.isReady()
+
+    const SharedView = (await import('../SharedView.vue')).default
+    const wrapper = mount(SharedView, {
+      global: {
+        plugins: [router],
+        stubs: { BreadcrumbBar: true, EmptyState: true, AppIcon: true },
+      },
+    })
+    await flushPromises()
+
+    const h2 = wrapper.find('h2')
+    expect(h2.exists()).toBe(true)
+    const cls = h2.attributes('class') || ''
+    expect(cls).toContain('font-semibold')
+    expect(cls).not.toContain('font-bold')
+    expect(cls).toContain('text-2xl')
+
+    wrapper.unmount()
+  })
+})
+
+describe('VISUAL-03: TopicsView page title uses font-semibold (not font-bold)', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    vi.resetModules()
+  })
+
+  it('h2 has text-2xl font-semibold and not font-bold', async () => {
+    vi.doMock('../../api/client.js', () => ({
+      getSharedWithMe: vi.fn().mockResolvedValue([]),
+      listFolders: vi.fn().mockResolvedValue({ items: [] }),
+      getDocument: vi.fn().mockResolvedValue(null),
+      getMyPreferences: vi.fn().mockResolvedValue({ pdf_open_mode: 'new_tab' }),
+      listTopics: vi.fn().mockResolvedValue({ topics: [] }),
+      getMyQuota: vi.fn().mockResolvedValue({ used_bytes: 0, limit_bytes: 104857600 }),
+    }))
+
+    setActivePinia(createPinia())
+    const router = makeRouter([
+      { path: '/topics/:name?', component: { template: '<div/>' } },
+    ])
+    await router.push('/topics')
+    await router.isReady()
+
+    const TopicsView = (await import('../TopicsView.vue')).default
+    const wrapper = mount(TopicsView, {
+      global: {
+        plugins: [router],
+        stubs: { TopicManager: true, DocumentCard: true, BreadcrumbBar: true },
+      },
+    })
+    await flushPromises()
+
+    const h2 = wrapper.find('h2')
+    expect(h2.exists()).toBe(true)
+    const cls = h2.attributes('class') || ''
+    expect(cls).toContain('font-semibold')
+    expect(cls).not.toContain('font-bold')
+    expect(cls).toContain('text-2xl')
+
+    wrapper.unmount()
+  })
+})
+
+describe('VISUAL-03: SettingsAccountTab section headings use text-sm font-semibold', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    vi.resetModules()
+  })
+
+  it('h3 inside bg-white panel does not use text-xl or font-bold', async () => {
+    vi.doMock('../../api/client.js', () => ({
+      getSharedWithMe: vi.fn().mockResolvedValue([]),
+      listFolders: vi.fn().mockResolvedValue({ items: [] }),
+      getDocument: vi.fn().mockResolvedValue(null),
+      getMyPreferences: vi.fn().mockResolvedValue({ pdf_open_mode: 'new_tab' }),
+      listTopics: vi.fn().mockResolvedValue({ topics: [] }),
+      getMyQuota: vi.fn().mockResolvedValue({ used_bytes: 0, limit_bytes: 104857600 }),
+    }))
+
+    setActivePinia(createPinia())
+
+    const { useAuthStore } = await import('../../stores/auth.js')
+    const authStore = useAuthStore()
+    authStore.user = { email: 'test@example.com', role: 'user', totp_enabled: false, handle: 'test' }
+
+    const router = makeRouter()
+    await router.push('/settings')
+    await router.isReady()
+
+    const SettingsAccountTab = (await import('../../components/settings/SettingsAccountTab.vue')).default
+    const wrapper = mount(SettingsAccountTab, {
+      global: {
+        plugins: [router],
+        stubs: {
+          TotpEnrollment: true,
+          ConfirmBlock: true,
+          PasswordStrengthBar: true,
+          AppIcon: true,
+          AppSpinner: true,
+        },
+      },
+    })
+    await flushPromises()
+
+    const headings = wrapper.findAll('h3')
+    expect(headings.length).toBeGreaterThan(0)
+
+    for (const h of headings) {
+      const cls = h.attributes('class') || ''
+      expect(cls).not.toContain('text-xl')
+      expect(cls).not.toContain('font-bold')
+      expect(cls).toContain('font-semibold')
+    }
+
+    wrapper.unmount()
+  })
+})
diff --git a/frontend/src/views/admin/AdminAiView.vue b/frontend/src/views/admin/AdminAiView.vue
index 3a87c16..31ceaf3 100644
--- a/frontend/src/views/admin/AdminAiView.vue
+++ b/frontend/src/views/admin/AdminAiView.vue
@@ -28,7 +28,7 @@
           :class="['transition-colors', prov.is_active ? 'border-l-4 border-l-green-500' : '']"
         >
           <button
-            class="w-full flex items-center justify-between px-6 py-3 text-left hover:bg-gray-50 transition-colors"
+            class="w-full flex items-center justify-between px-6 py-3 text-left hover:bg-gray-50 active:bg-gray-100 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-inset focus-visible:ring-indigo-500"
             @click="toggleProvider(prov.provider_id)"
           >
             <div class="flex items-center gap-3">
@@ -91,7 +91,7 @@
               <button
                 @click="saveSystemProvider(prov.provider_id, { activate: true })"
                 :disabled="savingProvider === prov.provider_id || prov.is_active"
-                class="text-xs bg-green-600 text-white font-semibold px-3 py-1.5 rounded-lg hover:bg-green-700 disabled:opacity-50 transition-colors"
+                class="text-xs bg-green-600 text-white font-semibold px-3 py-1.5 rounded-lg hover:bg-green-700 active:bg-green-800 disabled:opacity-50 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-green-500 focus-visible:ring-offset-1"
               >
                 Set Active
               </button>
@@ -99,7 +99,7 @@
               <button
                 @click="saveSystemProvider(prov.provider_id)"
                 :disabled="savingProvider === prov.provider_id"
-                class="text-xs bg-indigo-600 text-white font-semibold px-3 py-1.5 rounded-lg hover:bg-indigo-700 disabled:opacity-50 flex items-center gap-1 transition-colors"
+                class="text-xs bg-indigo-600 text-white font-semibold px-3 py-1.5 rounded-lg hover:bg-indigo-700 active:bg-indigo-800 disabled:opacity-50 flex items-center gap-1 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
               >
                 <span v-if="savingProvider === prov.provider_id" class="animate-spin rounded-full border-2 border-current border-t-transparent w-3 h-3"></span>
                 {{ savingProvider === prov.provider_id ? 'Saving…' : 'Save' }}
@@ -108,7 +108,7 @@
               <button
                 @click="runTestConnection(prov.provider_id)"
                 :disabled="testingProvider === prov.provider_id || savingProvider === prov.provider_id"
-                class="text-xs border border-gray-300 text-gray-700 font-semibold px-3 py-1.5 rounded-lg hover:bg-gray-100 disabled:opacity-50 flex items-center gap-1.5 transition-colors"
+                class="text-xs border border-gray-300 text-gray-700 font-semibold px-3 py-1.5 rounded-lg hover:bg-gray-100 active:bg-gray-200 disabled:opacity-50 flex items-center gap-1.5 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
               >
                 <span
                   v-if="testingProvider === prov.provider_id"
@@ -178,7 +178,7 @@
                 <button
                   @click="saveConfig(user.id)"
                   :disabled="savingId === user.id"
-                  class="text-sm text-indigo-600 hover:text-indigo-700 font-semibold disabled:opacity-50 flex items-center gap-1"
+                  class="text-sm text-indigo-600 hover:text-indigo-700 font-semibold disabled:opacity-50 flex items-center gap-1 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1 rounded"
                 >
                   <span v-if="savingId === user.id" class="animate-spin rounded-full border-2 border-current border-t-transparent w-3 h-3"></span>
                   {{ savingId === user.id ? 'Saving…' : 'Save' }}
diff --git a/frontend/src/views/admin/AdminAuditView.vue b/frontend/src/views/admin/AdminAuditView.vue
index 2271f9c..4d0dfec 100644
--- a/frontend/src/views/admin/AdminAuditView.vue
+++ b/frontend/src/views/admin/AdminAuditView.vue
@@ -44,14 +44,14 @@
       </div>
       <button
         @click="applyFilters"
-        class="bg-indigo-600 text-white text-sm px-4 py-2 rounded-lg hover:bg-indigo-700 transition-colors"
+        class="bg-indigo-600 text-white text-sm px-4 py-2 rounded-lg hover:bg-indigo-700 active:bg-indigo-800 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
       >
         Apply filters
       </button>
       <button
         v-if="activeFilterCount > 0"
         @click="clearFilters"
-        class="border border-gray-300 text-gray-500 text-sm px-4 py-2 rounded-lg hover:bg-gray-50 transition-colors"
+        class="border border-gray-300 text-gray-500 text-sm px-4 py-2 rounded-lg hover:bg-gray-50 active:bg-gray-100 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
       >
         Clear filters
       </button>
@@ -59,7 +59,7 @@
         <button
           @click="exportCsv"
           :disabled="exportingCsv"
-          class="border border-gray-300 text-gray-700 text-sm px-4 py-2 rounded-lg hover:bg-gray-50 transition-colors disabled:opacity-50"
+          class="border border-gray-300 text-gray-700 text-sm px-4 py-2 rounded-lg hover:bg-gray-50 active:bg-gray-100 transition-colors disabled:opacity-50 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
         >
           <span v-if="exportingCsv" class="flex items-center gap-1">
             <span class="animate-spin rounded-full border-2 border-current border-t-transparent w-3 h-3"></span>
@@ -141,7 +141,7 @@
       <button
         @click="prevPage"
         :disabled="page <= 1"
-        class="text-sm text-gray-600 hover:text-gray-900 disabled:opacity-40 disabled:cursor-not-allowed px-3 py-1.5 border border-gray-200 rounded-lg hover:bg-gray-50 transition-colors"
+        class="text-sm text-gray-600 hover:text-gray-900 disabled:opacity-40 disabled:cursor-not-allowed px-3 py-1.5 border border-gray-200 rounded-lg hover:bg-gray-50 active:bg-gray-100 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
       >
         Previous
       </button>
@@ -149,7 +149,7 @@
       <button
         @click="nextPage"
         :disabled="page * perPage >= total"
-        class="text-sm text-gray-600 hover:text-gray-900 disabled:opacity-40 disabled:cursor-not-allowed px-3 py-1.5 border border-gray-200 rounded-lg hover:bg-gray-50 transition-colors"
+        class="text-sm text-gray-600 hover:text-gray-900 disabled:opacity-40 disabled:cursor-not-allowed px-3 py-1.5 border border-gray-200 rounded-lg hover:bg-gray-50 active:bg-gray-100 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
       >
         Next
       </button>
@@ -183,7 +183,7 @@
         <button
           @click="downloadDailyExport"
           :disabled="!selectedExportDate || downloadingExport"
-          class="bg-indigo-600 hover:bg-indigo-700 text-white text-sm px-4 py-2 rounded-lg disabled:opacity-50 transition-colors flex items-center gap-1"
+          class="bg-indigo-600 hover:bg-indigo-700 active:bg-indigo-800 text-white text-sm px-4 py-2 rounded-lg disabled:opacity-50 transition-colors flex items-center gap-1 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
         >
           <span v-if="downloadingExport" class="animate-spin rounded-full border-2 border-current border-t-transparent w-3 h-3"></span>
           Download
diff --git a/frontend/src/views/admin/AdminOverviewView.vue b/frontend/src/views/admin/AdminOverviewView.vue
index 00eb9c7..4c236e0 100644
--- a/frontend/src/views/admin/AdminOverviewView.vue
+++ b/frontend/src/views/admin/AdminOverviewView.vue
@@ -2,7 +2,7 @@
   <div>
     <BreadcrumbBar :segments="[]" :show-root="false" class="mb-4" />
 
-    <h2 class="text-xl font-semibold text-gray-900 mb-6">Overview</h2>
+    <h2 class="text-2xl font-semibold text-gray-900 mb-6">Overview</h2>
 
     <div v-if="loading" class="text-gray-500">Loading overview…</div>
 
diff --git a/frontend/src/views/admin/AdminUsersView.vue b/frontend/src/views/admin/AdminUsersView.vue
index 020d9f9..de7595a 100644
--- a/frontend/src/views/admin/AdminUsersView.vue
+++ b/frontend/src/views/admin/AdminUsersView.vue
@@ -55,7 +55,7 @@
           <button
             @click="submitCreate"
             :disabled="creating"
-            class="bg-indigo-600 hover:bg-indigo-700 text-white text-sm font-semibold px-4 py-2 rounded-lg disabled:opacity-50 transition-colors"
+            class="bg-indigo-600 hover:bg-indigo-700 active:bg-indigo-800 text-white text-sm font-semibold px-4 py-2 rounded-lg disabled:opacity-50 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
           >
             <span v-if="creating" class="flex items-center gap-1.5">
               <span class="animate-spin rounded-full border-2 border-current border-t-transparent w-4 h-4"></span>
@@ -65,7 +65,7 @@
           </button>
           <button
             @click="cancelCreate"
-            class="text-sm px-4 py-2 border border-gray-300 rounded-lg hover:bg-gray-50 transition-colors"
+            class="text-sm px-4 py-2 border border-gray-300 rounded-lg hover:bg-gray-50 active:bg-gray-100 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
           >
             Cancel
           </button>
@@ -78,7 +78,7 @@
       <button
         v-if="!showCreateForm"
         @click="openCreateForm"
-        class="bg-indigo-600 hover:bg-indigo-700 text-white text-sm font-semibold px-4 py-2 rounded-lg transition-colors"
+        class="bg-indigo-600 hover:bg-indigo-700 active:bg-indigo-800 text-white text-sm font-semibold px-4 py-2 rounded-lg transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-1"
       >
         Create user
       </button>