diff --git a/src/AppProviders.tsx b/src/AppProviders.tsx
index ea1f5fc9..6b81bd27 100644
--- a/src/AppProviders.tsx
+++ b/src/AppProviders.tsx
@@ -26,6 +26,7 @@ import {
 import { resources } from '@/resources'
 import { PostHogPageview } from '@/components/analytics/PostHogPageview'
 import { PostHogIdentify } from '@/components/analytics/PostHogIdentify'
+import { CopyPasteTracking } from '@/components/analytics/CopyPasteTracking'
 import { ErrorBoundary } from '@/components/analytics/ErrorBoundary'
 import { SearchProvider } from '@/providers/search-provider'
 
@@ -99,6 +100,7 @@ export const AppProviders = ({ children }: { children: ReactNode }) => (
           <UnsavedChangesNotifier />
           <PostHogPageview />
           <PostHogIdentify />
+          <CopyPasteTracking />
           <DocumentTitleHandler handler={customTitleHandler} />
           <LocalizationProvider dateAdapter={AdapterDayjs}>
             <SearchProvider>
diff --git a/src/analytics/posthog.ts b/src/analytics/posthog.ts
index 4dd2c96a..84c67485 100644
--- a/src/analytics/posthog.ts
+++ b/src/analytics/posthog.ts
@@ -25,9 +25,11 @@ export const initPostHog = () => {
         if (el?.type === 'password') {
           return '*'.repeat(text.length)
         }
+        // ph-no-mask is PostHog's standard class for opting inputs out of masking.
+        // Check the element and its ancestors so the class can be set on a wrapper.
         if (
-          el?.hasAttribute?.('data-posthog-unmask-search') ||
-          el?.closest?.('[data-posthog-unmask-search]')
+          el?.classList?.contains('ph-no-mask') ||
+          el?.closest?.('.ph-no-mask')
         ) {
           return text
         }
@@ -109,3 +111,26 @@ export const resetUser = () => {
   posthog.reset()
 }
 
+export const setPersonProperties = (
+  properties: Record<string, unknown>
+) => {
+  if (!isEnabled || !initialized) return
+  posthog.setPersonProperties(properties)
+}
+
+/**
+ * Reads browser-level accessibility and display preferences once per
+ * session and returns them as PostHog person properties. Called after
+ * the user is identified so the values are attached to the person record.
+ */
+export const getAccessibilityProps = (): Record<string, unknown> => {
+  const rootFontSize = parseFloat(getComputedStyle(document.documentElement).fontSize)
+  return {
+    browser_font_size_px: rootFontSize,
+    font_size_increased: rootFontSize > 16,
+    device_pixel_ratio: window.devicePixelRatio ?? 1,
+    prefers_reduced_motion: window.matchMedia('(prefers-reduced-motion: reduce)').matches,
+    prefers_high_contrast: window.matchMedia('(prefers-contrast: more)').matches,
+  }
+}
+
diff --git a/src/components/SearchModal.tsx b/src/components/SearchModal.tsx
index 52e01b21..32d8bb7c 100644
--- a/src/components/SearchModal.tsx
+++ b/src/components/SearchModal.tsx
@@ -86,7 +86,7 @@ export const SearchModal = ({ open, onClose }: SearchModalProps) => {
             sx={{ fontSize: 15 }}
             inputProps={{
               'aria-label': 'Search',
-              'data-posthog-unmask-search': true,
+              className: 'ph-no-mask',
             }}
             endAdornment={
               state.query ? (
diff --git a/src/components/analytics/CopyPasteTracking.tsx b/src/components/analytics/CopyPasteTracking.tsx
new file mode 100644
index 00000000..6399d36a
--- /dev/null
+++ b/src/components/analytics/CopyPasteTracking.tsx
@@ -0,0 +1,10 @@
+import { useCopyPasteTracking } from '@/hooks/useCopyPasteTracking'
+
+/**
+ * Renderless component that wires up copy/cut/paste event tracking for the
+ * entire app. Mount once inside AppProviders.
+ */
+export const CopyPasteTracking = () => {
+  useCopyPasteTracking()
+  return null
+}
diff --git a/src/components/analytics/PostHogIdentify.tsx b/src/components/analytics/PostHogIdentify.tsx
index 0837d4b0..e442d5c0 100644
--- a/src/components/analytics/PostHogIdentify.tsx
+++ b/src/components/analytics/PostHogIdentify.tsx
@@ -1,7 +1,7 @@
 import { useEffect } from 'react'
 import { useGetIdentity } from '@refinedev/core'
 import { AuthentikIdentity } from '@/providers/authentik-provider'
-import { identifyUser, resetUser } from '@/analytics/posthog'
+import { identifyUser, resetUser, getAccessibilityProps, setPersonProperties } from '@/analytics/posthog'
 
 export const PostHogIdentify = () => {
   const { data: identity } = useGetIdentity<AuthentikIdentity>()
@@ -9,6 +9,7 @@ export const PostHogIdentify = () => {
   useEffect(() => {
     if (identity?.id) {
       identifyUser(identity.id, { name: identity.name, email: identity.email })
+      setPersonProperties(getAccessibilityProps())
     } else {
       resetUser()
     }
diff --git a/src/hooks/useCopyPasteTracking.ts b/src/hooks/useCopyPasteTracking.ts
new file mode 100644
index 00000000..a228d84c
--- /dev/null
+++ b/src/hooks/useCopyPasteTracking.ts
@@ -0,0 +1,42 @@
+import { useEffect } from 'react'
+import { captureEvent } from '@/analytics/posthog'
+
+/**
+ * Attaches document-level listeners for copy, cut, and paste events and
+ * fires PostHog events for each. The actual copied or pasted text is never
+ * captured — only the page path and, for copy/cut, the selection length.
+ * Cut is tracked as text_cut, separate from text_copied.
+ */
+export const useCopyPasteTracking = () => {
+  useEffect(() => {
+    const handleCopy = () => {
+      captureEvent('text_copied', {
+        path: window.location.pathname,
+        selection_length: window.getSelection()?.toString().length ?? 0,
+      })
+    }
+
+    const handleCut = () => {
+      captureEvent('text_cut', {
+        path: window.location.pathname,
+        selection_length: window.getSelection()?.toString().length ?? 0,
+      })
+    }
+
+    const handlePaste = () => {
+      captureEvent('text_pasted', {
+        path: window.location.pathname,
+      })
+    }
+
+    document.addEventListener('copy', handleCopy)
+    document.addEventListener('cut', handleCut)
+    document.addEventListener('paste', handlePaste)
+
+    return () => {
+      document.removeEventListener('copy', handleCopy)
+      document.removeEventListener('cut', handleCut)
+      document.removeEventListener('paste', handlePaste)
+    }
+  }, [])
+}