From 0b86ece1d5970a26a7eb5129d8ff07b998876e90 Mon Sep 17 00:00:00 2001
From: Lucas Smith <me@lucasjamessmith.me>
Date: Mon, 11 May 2026 13:03:02 +1000
Subject: [PATCH] feat: add custom branding for signing pages (#2785)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Platform-plan organisations and teams can now customise non-embed
signing pages with six brand colour tokens, a border-radius, and
a free-text custom CSS block (up to 256 KB).

- Stored on OrganisationGlobalSettings / TeamGlobalSettings;
  teams inherit from the org via brandingEnabled === null.
- CSS is sanitised on save (PostCSS) so we can inline it at SSR
  with no per-render parsing.
- Rendered via a nonce'd <style> scoped under .documenso-branded,
  using native CSS nesting so user selectors don't need scoping.
- Gated on the existing embedSigningWhiteLabel claim (or
  self-hosted) — reuses the embed white-label decision.
---
 ...eal-tree-platform-signing-page-branding.md | 138 ++++++
 .../forms/branding-preferences-form.tsx       | 238 +++++++++-
 .../components/general/recipient-branding.tsx |  90 ++++
 apps/remix/app/root.tsx                       |  10 +-
 .../_authenticated+/admin+/site-settings.tsx  |   8 +-
 .../o.$orgUrl.settings.branding.tsx           |  71 ++-
 .../t.$teamUrl+/settings.branding.tsx         |  83 +++-
 .../routes/_recipient+/d.$token+/_index.tsx   |  22 +-
 .../_recipient+/sign.$token+/_index.tsx       |  22 +-
 .../_recipient+/sign.$token+/complete.tsx     | 284 ++++++------
 .../_recipient+/sign.$token+/expired.tsx      |  72 +--
 .../_recipient+/sign.$token+/rejected.tsx     |  88 ++--
 .../_recipient+/sign.$token+/waiting.tsx      |  71 +--
 apps/remix/app/utils/css-vars.ts              |  37 +-
 apps/remix/app/utils/nonce.ts                 |  17 +
 package-lock.json                             |  29 +-
 .../envelope-editor-embedded.spec.ts          |  10 +-
 .../lib/utils/handle-oauth-callback-url.ts    |   5 +-
 packages/lib/constants/auth.ts                |   4 +-
 packages/lib/constants/branding.ts            |  11 +
 packages/lib/constants/theme.ts               |  58 +++
 packages/lib/package.json                     |   2 +
 .../branding/load-recipient-branding.ts       |  55 +++
 .../lib/server-only/team/get-team-settings.ts |   2 +
 packages/lib/types/css-vars.ts                |  14 +-
 .../lib/utils/normalize-branding-colors.ts    |  46 ++
 packages/lib/utils/organisations.ts           |   2 +
 .../lib/utils/sanitize-branding-css.test.ts   | 436 ++++++++++++++++++
 packages/lib/utils/sanitize-branding-css.ts   | 323 +++++++++++++
 packages/lib/utils/teams.ts                   |   2 +
 .../migration.sql                             |   7 +
 packages/prisma/schema.prisma                 |   8 +-
 .../update-organisation-settings.ts           |  28 ++
 .../update-organisation-settings.types.ts     |   9 +-
 .../team-router/update-team-settings.ts       |  31 ++
 .../team-router/update-team-settings.types.ts |   9 +-
 packages/ui/primitives/color-picker.tsx       |  14 +-
 37 files changed, 2055 insertions(+), 301 deletions(-)
 create mode 100644 .agents/plans/happy-teal-tree-platform-signing-page-branding.md
 create mode 100644 apps/remix/app/components/general/recipient-branding.tsx
 create mode 100644 packages/lib/constants/branding.ts
 create mode 100644 packages/lib/constants/theme.ts
 create mode 100644 packages/lib/server-only/branding/load-recipient-branding.ts
 create mode 100644 packages/lib/utils/normalize-branding-colors.ts
 create mode 100644 packages/lib/utils/sanitize-branding-css.test.ts
 create mode 100644 packages/lib/utils/sanitize-branding-css.ts
 create mode 100644 packages/prisma/migrations/20260507043737_add_custom_css_branding/migration.sql

diff --git a/.agents/plans/happy-teal-tree-platform-signing-page-branding.md b/.agents/plans/happy-teal-tree-platform-signing-page-branding.md
new file mode 100644
index 000000000..efe3c75b7
--- /dev/null
+++ b/.agents/plans/happy-teal-tree-platform-signing-page-branding.md
@@ -0,0 +1,138 @@
+---
+date: 2026-05-06
+title: Platform Signing Page Branding
+---
+
+## What
+
+Platform-plan organisations (and their teams) can customise the **non-embed
+signing pages** (`/sign/:token`, `/d/:token`, and the sibling
+complete/expired/rejected/waiting pages) with:
+
+- Six brand colour tokens (background, foreground, primary, primary-foreground,
+  border, ring) plus a border-radius length.
+- A free-text custom CSS block (up to 256 KB).
+
+Settings live on `OrganisationGlobalSettings` and `TeamGlobalSettings`. Teams
+inherit from the org via the existing `brandingEnabled === null` mechanism.
+
+## Why
+
+- Embed customers already have white-label CSS; Platform customers want the
+  same coverage on direct signing URLs that they iframe or link to.
+- Persisting on org/team (not per envelope) means it's set-and-forget.
+- Sanitising **on save** lets us inline the verbatim string at SSR — no
+  per-render parsing cost, no `<style>.innerHTML` injection on the client.
+- Reusing the existing `embedSigningWhiteLabel` claim flag keeps "if you can
+  white-label an embed, you can white-label this" as one decision.
+
+## How
+
+### Storage (`packages/prisma/schema.prisma`)
+
+Two new fields on each settings model. No new tables.
+
+| Field            | Org type           | Team type          |
+| ---------------- | ------------------ | ------------------ |
+| `brandingColors` | `Json?` (nullable) | `Json?` (nullable) |
+| `brandingCss`    | `String @default("")` | `String?`       |
+
+Colours are validated against `ZCssVarsSchema`. The team's `null` means
+"inherit"; an empty colour object is collapsed to `null` server-side so a
+team toggling `brandingEnabled = true` without filling in colours doesn't
+silently override the org's defaults with nothing.
+
+### Sanitiser (`packages/lib/utils/sanitize-branding-css.ts`)
+
+PostCSS + `postcss-selector-parser`. Runs on save only.
+
+- Drops selectors containing `::before`/`::after`/`::backdrop`/`::marker` or
+  the universal `*`.
+- Drops integrity-breaking properties (`display`, `position`, `transform`,
+  layout-affecting dimensions, text-hiding properties).
+- Drops declaration values containing `url(`, `expression(`, `@import`,
+  `javascript:`.
+- Strips `!important`.
+- Allows `@media` only; drops other at-rules.
+- **Does not** rewrite selectors. Scoping happens at render time via native
+  CSS nesting under `.documenso-branded { ... }`.
+- Final-pass tripwire: if a literal `</style` somehow survives serialization,
+  reject the entire output. PostCSS already escapes `<` to `\3c` whenever it
+  would form `</...`; the explicit check is belt-and-braces in case a future
+  serializer regresses.
+- Returns `{ css, warnings[] }`. Warnings are surfaced in the UI.
+
+Border-radius is the only token interpolated raw into a `<style>` block; it
+is regex-validated (`CSS_LENGTH_REGEX`) at both the Zod schema and the
+runtime `toNativeCssVars` call. Belt-and-braces against schema drift.
+
+### Render (`apps/remix/app/components/general/recipient-branding.tsx`)
+
+Each recipient loader calls `loadRecipientBrandingByTeamId` and threads the
+payload through to `<RecipientBranding>`, which emits a single
+nonce-attributed `<style>`:
+
+```
+.documenso-branded {
+  --background: ...; ...
+  <user css>
+}
+```
+
+Native CSS nesting expands user rules under the wrapper. The body class is
+applied unconditionally to recipient routes in `root.tsx` via `useMatches()`
+so portaled Radix content (dialogs, popovers, tooltips, dropdowns) inherits
+the scope.
+
+CSP for recipient routes already supports `<style nonce>`; no policy
+changes needed.
+
+### Plan gate
+
+`organisationClaim.flags.embedSigningWhiteLabel || !IS_BILLING_ENABLED()`.
+Self-hosted instances always allow. The outer paywall for logo/URL/details
+stays on `allowCustomBranding` (Team plan and up); only the new
+colour/CSS section is Platform-only.
+
+### UI (`apps/remix/app/components/forms/branding-preferences-form.tsx`)
+
+Extends the existing branding form. Six `<ColorPicker showHex>` (rewritten
+to use the native `<input type="color">` instead of `react-colorful`, which
+was removed) in a 2-col grid, plus a free-text radius input and an
+`<Accordion>` revealing a mono `<Textarea>`. Defaults come from
+`packages/lib/constants/theme.ts` (light-mode hex mirror of `theme.css`).
+
+Warnings from the sanitiser are surfaced in an `<Alert variant="warning">`
+after save, and the `brandingCss` textarea is re-synced from the persisted
+value so the user sees exactly what was stored. Other fields are
+deliberately NOT reset on settings refetch — that would clobber in-flight
+edits.
+
+### TRPC
+
+`update-organisation-settings` and `update-team-settings` accept the new
+fields, run them through `sanitizeBrandingCss` + `normalizeBrandingColors`,
+and return any sanitiser warnings to the client. The team route treats
+`null` as "inherit"; an empty post-sanitisation string is collapsed to
+`null` (team) so an empty override doesn't mask the org's CSS.
+
+## Known accepted limitations
+
+- The sanitiser does not prevent hostile-but-syntactically-valid CSS
+  (`color: transparent`, low-contrast values, etc.). The customer is
+  branding **their own** signing pages — we focus on integrity (no
+  overlay/hide/exfiltrate), not aesthetic policing.
+- User rules targeting `body`/`html`/`:root` no-op once nested under the
+  wrapper class. Documented for users.
+- CSS nesting baseline is Chrome 120+ / Firefox 117+ / Safari 16.5+.
+  Acceptable for the Platform-tier audience.
+- No automated `theme.css` ↔ `theme.ts` sync check; fat comment in
+  `theme.ts` reminds devs to update both.
+- Per-section team inherit is coarse — `brandingEnabled = null` inherits
+  everything from the org. Per-field inherit toggles are deferred.
+
+## Out of scope
+
+Live preview, embed-route sanitiser unification, email/PDF certificate
+branding, custom font upload, the full ~30 colour tokens in the picker UI,
+wiring `hidePoweredBy` through to the actual footer.
diff --git a/apps/remix/app/components/forms/branding-preferences-form.tsx b/apps/remix/app/components/forms/branding-preferences-form.tsx
index a6d320f07..fa83eb20c 100644
--- a/apps/remix/app/components/forms/branding-preferences-form.tsx
+++ b/apps/remix/app/components/forms/branding-preferences-form.tsx
@@ -1,7 +1,11 @@
 import { useCurrentOrganisation } from '@documenso/lib/client-only/providers/organisation';
 import { NEXT_PUBLIC_WEBAPP_URL } from '@documenso/lib/constants/app';
+import { DEFAULT_BRAND_COLORS, DEFAULT_BRAND_RADIUS } from '@documenso/lib/constants/theme';
+import { ZCssVarsSchema } from '@documenso/lib/types/css-vars';
 import { cn } from '@documenso/ui/lib/utils';
+import { Accordion, AccordionContent, AccordionItem, AccordionTrigger } from '@documenso/ui/primitives/accordion';
 import { Button } from '@documenso/ui/primitives/button';
+import { ColorPicker } from '@documenso/ui/primitives/color-picker';
 import { Form, FormControl, FormDescription, FormField, FormItem, FormLabel } from '@documenso/ui/primitives/form/form';
 import { Input } from '@documenso/ui/primitives/input';
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@documenso/ui/primitives/select';
@@ -15,6 +19,7 @@ import { useForm } from 'react-hook-form';
 import { z } from 'zod';
 
 import { useOptionalCurrentTeam } from '~/providers/team';
+import { useCspNonce } from '~/utils/nonce';
 
 const MAX_FILE_SIZE = 5 * 1024 * 1024; // 5MB
 const ACCEPTED_FILE_TYPES = ['image/jpeg', 'image/png', 'image/webp'];
@@ -28,17 +33,20 @@ const ZBrandingPreferencesFormSchema = z.object({
     .nullish(),
   brandingUrl: z.string().url().optional().or(z.literal('')),
   brandingCompanyDetails: z.string().max(500).optional(),
+  brandingColors: ZCssVarsSchema.default({}),
+  brandingCss: z.string().max(10_000).default(''),
 });
 
 export type TBrandingPreferencesFormSchema = z.infer<typeof ZBrandingPreferencesFormSchema>;
 
 type SettingsSubset = Pick<
   TeamGlobalSettings,
-  'brandingEnabled' | 'brandingLogo' | 'brandingUrl' | 'brandingCompanyDetails'
+  'brandingEnabled' | 'brandingLogo' | 'brandingUrl' | 'brandingCompanyDetails' | 'brandingColors' | 'brandingCss'
 >;
 
 export type BrandingPreferencesFormProps = {
   canInherit?: boolean;
+  hasAdvancedBranding: boolean;
   settings: SettingsSubset;
   onFormSubmit: (data: TBrandingPreferencesFormSchema) => Promise<void>;
   context: 'Team' | 'Organisation';
@@ -46,11 +54,13 @@ export type BrandingPreferencesFormProps = {
 
 export function BrandingPreferencesForm({
   canInherit = false,
+  hasAdvancedBranding,
   settings,
   onFormSubmit,
   context,
 }: BrandingPreferencesFormProps) {
   const { t } = useLingui();
+  const nonce = useCspNonce();
 
   const team = useOptionalCurrentTeam();
   const organisation = useCurrentOrganisation();
@@ -58,12 +68,17 @@ export function BrandingPreferencesForm({
   const [previewUrl, setPreviewUrl] = useState<string>('');
   const [hasLoadedPreview, setHasLoadedPreview] = useState(false);
 
+  const parsedColors = ZCssVarsSchema.safeParse(settings.brandingColors);
+  const initialColors = parsedColors.success ? parsedColors.data : {};
+
   const form = useForm<TBrandingPreferencesFormSchema>({
-    defaultValues: {
+    values: {
       brandingEnabled: settings.brandingEnabled ?? null,
       brandingUrl: settings.brandingUrl ?? '',
       brandingLogo: undefined,
       brandingCompanyDetails: settings.brandingCompanyDetails ?? '',
+      brandingColors: initialColors,
+      brandingCss: settings.brandingCss ?? '',
     },
     resolver: zodResolver(ZBrandingPreferencesFormSchema),
   });
@@ -304,6 +319,225 @@ export function BrandingPreferencesForm({
             />
           </div>
 
+          {hasAdvancedBranding && (
+            <div className="relative flex w-full flex-col gap-y-6">
+              {!isBrandingEnabled && <div className="absolute inset-0 z-[9998] bg-background/60" />}
+
+              <div>
+                <FormLabel>
+                  <Trans>Brand Colours</Trans>
+                </FormLabel>
+
+                <FormDescription className="mt-1 mb-4">
+                  <Trans>Customise the colours used on your signing pages.</Trans>
+                </FormDescription>
+
+                <div className="grid grid-cols-2 gap-4">
+                  <FormField
+                    control={form.control}
+                    name="brandingColors.background"
+                    render={({ field }) => (
+                      <FormItem>
+                        <FormLabel>
+                          <Trans>Background</Trans>
+                        </FormLabel>
+                        <FormDescription>
+                          <Trans>Base background colour.</Trans>
+                        </FormDescription>
+                        <FormControl>
+                          <ColorPicker
+                            nonce={nonce}
+                            value={field.value ?? ''}
+                            defaultValue={DEFAULT_BRAND_COLORS.background}
+                            onChange={(color) => field.onChange(color)}
+                          />
+                        </FormControl>
+                      </FormItem>
+                    )}
+                  />
+
+                  <FormField
+                    control={form.control}
+                    name="brandingColors.foreground"
+                    render={({ field }) => (
+                      <FormItem>
+                        <FormLabel>
+                          <Trans>Foreground</Trans>
+                        </FormLabel>
+                        <FormDescription>
+                          <Trans>Base text colour.</Trans>
+                        </FormDescription>
+                        <FormControl>
+                          <ColorPicker
+                            nonce={nonce}
+                            value={field.value ?? ''}
+                            defaultValue={DEFAULT_BRAND_COLORS.foreground}
+                            onChange={(color) => field.onChange(color)}
+                          />
+                        </FormControl>
+                      </FormItem>
+                    )}
+                  />
+
+                  <FormField
+                    control={form.control}
+                    name="brandingColors.primary"
+                    render={({ field }) => (
+                      <FormItem>
+                        <FormLabel>
+                          <Trans>Primary</Trans>
+                        </FormLabel>
+                        <FormDescription>
+                          <Trans>Primary action colour.</Trans>
+                        </FormDescription>
+                        <FormControl>
+                          <ColorPicker
+                            nonce={nonce}
+                            value={field.value ?? ''}
+                            defaultValue={DEFAULT_BRAND_COLORS.primary}
+                            onChange={(color) => field.onChange(color)}
+                          />
+                        </FormControl>
+                      </FormItem>
+                    )}
+                  />
+
+                  <FormField
+                    control={form.control}
+                    name="brandingColors.primaryForeground"
+                    render={({ field }) => (
+                      <FormItem>
+                        <FormLabel>
+                          <Trans>Primary Foreground</Trans>
+                        </FormLabel>
+                        <FormDescription>
+                          <Trans>Text colour on primary buttons.</Trans>
+                        </FormDescription>
+                        <FormControl>
+                          <ColorPicker
+                            nonce={nonce}
+                            value={field.value ?? ''}
+                            defaultValue={DEFAULT_BRAND_COLORS.primaryForeground}
+                            onChange={(color) => field.onChange(color)}
+                          />
+                        </FormControl>
+                      </FormItem>
+                    )}
+                  />
+
+                  <FormField
+                    control={form.control}
+                    name="brandingColors.border"
+                    render={({ field }) => (
+                      <FormItem>
+                        <FormLabel>
+                          <Trans>Border</Trans>
+                        </FormLabel>
+                        <FormDescription>
+                          <Trans>Default border colour.</Trans>
+                        </FormDescription>
+                        <FormControl>
+                          <ColorPicker
+                            nonce={nonce}
+                            value={field.value ?? ''}
+                            defaultValue={DEFAULT_BRAND_COLORS.border}
+                            onChange={(color) => field.onChange(color)}
+                          />
+                        </FormControl>
+                      </FormItem>
+                    )}
+                  />
+
+                  <FormField
+                    control={form.control}
+                    name="brandingColors.ring"
+                    render={({ field }) => (
+                      <FormItem>
+                        <FormLabel>
+                          <Trans>Ring</Trans>
+                        </FormLabel>
+                        <FormDescription>
+                          <Trans>Focus ring colour.</Trans>
+                        </FormDescription>
+                        <FormControl>
+                          <ColorPicker
+                            nonce={nonce}
+                            value={field.value ?? ''}
+                            defaultValue={DEFAULT_BRAND_COLORS.ring}
+                            onChange={(color) => field.onChange(color)}
+                          />
+                        </FormControl>
+                      </FormItem>
+                    )}
+                  />
+                </div>
+
+                <div className="mt-4">
+                  <FormField
+                    control={form.control}
+                    name="brandingColors.radius"
+                    render={({ field }) => (
+                      <FormItem>
+                        <FormLabel>
+                          <Trans>Border Radius</Trans>
+                        </FormLabel>
+                        <FormControl>
+                          <Input
+                            type="text"
+                            placeholder={DEFAULT_BRAND_RADIUS}
+                            value={field.value ?? ''}
+                            onChange={(e) => field.onChange(e.target.value)}
+                          />
+                        </FormControl>
+                        <FormDescription>
+                          <Trans>Border radius size in REM units (e.g. 0.5rem).</Trans>
+                        </FormDescription>
+                      </FormItem>
+                    )}
+                  />
+                </div>
+              </div>
+
+              <Accordion type="single" collapsible>
+                <AccordionItem value="custom-css" className="border-none">
+                  <AccordionTrigger className="rounded border px-3 py-2 text-left text-foreground hover:bg-muted/40 hover:no-underline">
+                    <Trans>Advanced — Custom CSS</Trans>
+                  </AccordionTrigger>
+
+                  <AccordionContent className="-mx-1 px-1 pt-4 text-muted-foreground text-sm leading-relaxed">
+                    <FormField
+                      control={form.control}
+                      name="brandingCss"
+                      render={({ field }) => (
+                        <FormItem className="flex-1">
+                          <FormControl>
+                            <Textarea
+                              placeholder={t`/* Write CSS targeting your signing pages. Selectors are scoped automatically. */
+.my-button {
+  background: red;
+}`}
+                              className="min-h-[200px] font-mono text-xs"
+                              {...field}
+                              value={field.value ?? ''}
+                            />
+                          </FormControl>
+
+                          <FormDescription>
+                            <Trans>
+                              Custom CSS is sanitised on save. Layout-breaking properties, remote URLs, and
+                              pseudo-elements are stripped automatically. Any rules dropped during sanitisation will be
+                              shown after you save.
+                            </Trans>
+                          </FormDescription>
+                        </FormItem>
+                      )}
+                    />
+                  </AccordionContent>
+                </AccordionItem>
+              </Accordion>
+            </div>
+          )}
+
           <div className="flex flex-row justify-end space-x-4">
             <Button type="submit" loading={form.formState.isSubmitting}>
               <Trans>Update</Trans>
diff --git a/apps/remix/app/components/general/recipient-branding.tsx b/apps/remix/app/components/general/recipient-branding.tsx
new file mode 100644
index 000000000..f1349b929
--- /dev/null
+++ b/apps/remix/app/components/general/recipient-branding.tsx
@@ -0,0 +1,90 @@
+import type { TCssVarsSchema } from '@documenso/lib/types/css-vars';
+import { useEffect } from 'react';
+
+import { toNativeCssVarsString } from '~/utils/css-vars';
+
+export type RecipientBrandingPayload = {
+  allowCustomBranding: boolean;
+  colors?: TCssVarsSchema | null;
+  css?: string | null;
+};
+
+export type RecipientBrandingProps = {
+  branding: RecipientBrandingPayload | null | undefined;
+  cspNonce: string | undefined;
+};
+
+/**
+ * Renders a `<style nonce>` block for a recipient route, scoped to the
+ * `.documenso-branded` wrapper rendered in `_recipient+/_layout.tsx`.
+ *
+ * Both the CSS variables (from `branding.colors`) and the user's custom CSS
+ * (from `branding.css`) are emitted inside a single nested rule so the user
+ * doesn't need to scope their own selectors — native CSS nesting handles it:
+ *
+ *   .documenso-branded {
+ *     --background: ...;
+ *     .my-class { color: red; }
+ *   }
+ *
+ * Equivalent to `.documenso-branded .my-class { color: red; }` after expansion.
+ *
+ * The user's CSS is sanitised at write time (`sanitizeBrandingCss`) and stored
+ * in the DB as-is — no per-render parsing.
+ *
+ * Why both SSR `<style>` and a `useEffect` injection?
+ *
+ * The rendered `<style>` covers the initial server render so the first paint
+ * already has the branding applied — without it, the page would flash the
+ * default theme before hydration.
+ *
+ * The `useEffect` covers in-app client-side navigations. When the user
+ * navigates between recipient routes via the router, the server render
+ * doesn't run again, so React reconciles the existing DOM. If the loader
+ * data changes (e.g. a different recipient with different branding), the
+ * SSR'd `<style>` from the previous page may persist or be reused, leading
+ * to stale or inconsistent branding. Appending a fresh `<style>` to
+ * `document.head` and removing it on cleanup guarantees the active branding
+ * matches the current route on both initial load and subsequent navigations.
+ */
+export const RecipientBranding = ({ branding, cspNonce }: RecipientBrandingProps) => {
+  const varsString = toNativeCssVarsString(branding?.colors ?? {});
+
+  const userCss = branding?.css ?? '';
+
+  const hasVars = varsString.trim().length > 0;
+  const hasUserCss = userCss.trim().length > 0;
+
+  const innerBody = `${hasVars ? `${varsString}\n` : ''}${hasUserCss ? userCss : ''}`.trim();
+  const css = `.documenso-branded { ${innerBody} }`;
+
+  useEffect(() => {
+    if (!branding?.allowCustomBranding) {
+      return;
+    }
+
+    if (!hasVars && !hasUserCss) {
+      return;
+    }
+
+    const style = document.createElement('style');
+    style.setAttribute('nonce', cspNonce ?? '');
+    style.textContent = css;
+
+    document.head.appendChild(style);
+
+    return () => {
+      document.head.removeChild(style);
+    };
+  }, [branding, cspNonce, css, hasUserCss, hasVars]);
+
+  if (!branding?.allowCustomBranding) {
+    return null;
+  }
+
+  if (!hasVars && !hasUserCss) {
+    return null;
+  }
+
+  return <style nonce={cspNonce}>{css}</style>;
+};
diff --git a/apps/remix/app/root.tsx b/apps/remix/app/root.tsx
index 0c6341cad..096b1504e 100644
--- a/apps/remix/app/root.tsx
+++ b/apps/remix/app/root.tsx
@@ -17,6 +17,7 @@ import {
   Scripts,
   ScrollRestoration,
   useLoaderData,
+  useMatches,
 } from 'react-router';
 import { PreventFlashOnWrongTheme, ThemeProvider, useTheme } from 'remix-themes';
 
@@ -110,6 +111,13 @@ export function LayoutContent({ children }: { children: React.ReactNode }) {
 
   const [theme] = useTheme();
 
+  // Recipient routes (signing pages) put `documenso-branded` on <body> so the
+  // <style> block from `RecipientBranding` applies to BOTH the main tree and
+  // any portaled content (Radix dialogs/popovers/dropdowns mount outside the
+  // route tree, attached directly to document.body).
+  const matches = useMatches();
+  const isRecipientRoute = matches.some((m) => m.id?.startsWith('routes/_recipient+'));
+
   return (
     <html translate="no" lang={lang} data-theme={theme} className={theme ?? ''}>
       <head>
@@ -137,7 +145,7 @@ export function LayoutContent({ children }: { children: React.ReactNode }) {
         {/* Fix: https://stackoverflow.com/questions/21147149/flash-of-unstyled-content-fouc-in-firefox-only-is-ff-slow-renderer */}
         <script nonce={nonce(cspNonce)}>0</script>
       </head>
-      <body>
+      <body className={isRecipientRoute ? 'documenso-branded' : undefined}>
         {/* Global license banner currently disabled. Need to wait until after a few releases. */}
         {/* {licenseStatus === '?' && (
           <div className="bg-destructive text-destructive-foreground">
diff --git a/apps/remix/app/routes/_authenticated+/admin+/site-settings.tsx b/apps/remix/app/routes/_authenticated+/admin+/site-settings.tsx
index a42109cde..142cba6fc 100644
--- a/apps/remix/app/routes/_authenticated+/admin+/site-settings.tsx
+++ b/apps/remix/app/routes/_authenticated+/admin+/site-settings.tsx
@@ -27,7 +27,7 @@ import { useRevalidator } from 'react-router';
 import type { z } from 'zod';
 
 import { SettingsHeader } from '~/components/general/settings-header';
-
+import { useCspNonce } from '~/utils/nonce';
 import type { Route } from './+types/site-settings';
 
 const ZBannerFormSchema = ZSiteSettingsBannerSchema;
@@ -45,6 +45,8 @@ export async function loader() {
 export default function AdminBannerPage({ loaderData }: Route.ComponentProps) {
   const { banner } = loaderData;
 
+  const nonce = useCspNonce();
+
   const { toast } = useToast();
   const { _ } = useLingui();
   const { revalidate } = useRevalidator();
@@ -142,7 +144,7 @@ export default function AdminBannerPage({ loaderData }: Route.ComponentProps) {
 
                         <FormControl>
                           <div>
-                            <ColorPicker {...field} />
+                            <ColorPicker {...field} nonce={nonce} />
                           </div>
                         </FormControl>
 
@@ -162,7 +164,7 @@ export default function AdminBannerPage({ loaderData }: Route.ComponentProps) {
 
                         <FormControl>
                           <div>
-                            <ColorPicker {...field} />
+                            <ColorPicker {...field} nonce={nonce} />
                           </div>
                         </FormControl>
 
diff --git a/apps/remix/app/routes/_authenticated+/o.$orgUrl.settings.branding.tsx b/apps/remix/app/routes/_authenticated+/o.$orgUrl.settings.branding.tsx
index 4aafa73ba..9243b9d4c 100644
--- a/apps/remix/app/routes/_authenticated+/o.$orgUrl.settings.branding.tsx
+++ b/apps/remix/app/routes/_authenticated+/o.$orgUrl.settings.branding.tsx
@@ -3,13 +3,15 @@ import { useSession } from '@documenso/lib/client-only/providers/session';
 import { IS_BILLING_ENABLED } from '@documenso/lib/constants/app';
 import { putFile } from '@documenso/lib/universal/upload/put-file';
 import { canExecuteOrganisationAction, isPersonalLayout } from '@documenso/lib/utils/organisations';
+import type { SanitizeBrandingCssWarning } from '@documenso/lib/utils/sanitize-branding-css';
 import { trpc } from '@documenso/trpc/react';
 import { Alert, AlertDescription, AlertTitle } from '@documenso/ui/primitives/alert';
 import { Button } from '@documenso/ui/primitives/button';
 import { useToast } from '@documenso/ui/primitives/use-toast';
-import { msg } from '@lingui/core/macro';
+import { msg, plural } from '@lingui/core/macro';
 import { Trans, useLingui } from '@lingui/react/macro';
 import { Loader } from 'lucide-react';
+import { useState } from 'react';
 import { Link } from 'react-router';
 
 import {
@@ -35,7 +37,13 @@ export default function OrganisationSettingsBrandingPage() {
 
   const isPersonalLayoutMode = isPersonalLayout(organisations);
 
-  const { data: organisationWithSettings, isLoading: isLoadingOrganisation } = trpc.organisation.get.useQuery({
+  const [cssWarnings, setCssWarnings] = useState<SanitizeBrandingCssWarning[]>([]);
+
+  const {
+    data: organisationWithSettings,
+    isLoading: isLoadingOrganisation,
+    refetch: refetchOrganisation,
+  } = trpc.organisation.get.useQuery({
     organisationReference: organisation.url,
   });
 
@@ -43,7 +51,7 @@ export default function OrganisationSettingsBrandingPage() {
 
   const onBrandingPreferencesFormSubmit = async (data: TBrandingPreferencesFormSchema) => {
     try {
-      const { brandingEnabled, brandingLogo, brandingUrl, brandingCompanyDetails } = data;
+      const { brandingEnabled, brandingLogo, brandingUrl, brandingCompanyDetails, brandingColors, brandingCss } = data;
 
       let uploadedBrandingLogo: string | undefined;
 
@@ -56,20 +64,40 @@ export default function OrganisationSettingsBrandingPage() {
         uploadedBrandingLogo = '';
       }
 
-      await updateOrganisationSettings({
+      const result = await updateOrganisationSettings({
         organisationId: organisation.id,
         data: {
           brandingEnabled: brandingEnabled ?? undefined,
           brandingLogo: uploadedBrandingLogo,
           brandingUrl,
           brandingCompanyDetails,
+          brandingColors,
+          brandingCss,
         },
       });
 
-      toast({
-        title: t`Branding preferences updated`,
-        description: t`Your branding preferences have been updated`,
-      });
+      // Refetch so the form re-syncs with the sanitised CSS that was
+      // actually persisted (sanitiser may have dropped rules).
+      await refetchOrganisation();
+
+      const warnings = result?.cssWarnings ?? [];
+      setCssWarnings(warnings);
+
+      if (warnings.length > 0) {
+        toast({
+          title: t`Branding preferences updated with warnings`,
+          description: plural(warnings.length, {
+            one: '# CSS rule was dropped during sanitisation.',
+            other: '# CSS rules were dropped during sanitisation.',
+          }),
+          duration: 8000,
+        });
+      } else {
+        toast({
+          title: t`Branding preferences updated`,
+          description: t`Your branding preferences have been updated`,
+        });
+      }
     } catch (err) {
       toast({
         title: t`Something went wrong`,
@@ -103,9 +131,36 @@ export default function OrganisationSettingsBrandingPage() {
         <section>
           <BrandingPreferencesForm
             context="Organisation"
+            hasAdvancedBranding={
+              organisationWithSettings.organisationClaim.flags.embedSigningWhiteLabel === true || !IS_BILLING_ENABLED()
+            }
             settings={organisationWithSettings.organisationGlobalSettings}
             onFormSubmit={onBrandingPreferencesFormSubmit}
           />
+
+          {cssWarnings.length > 0 && (
+            <Alert variant="warning" className="mt-6">
+              <AlertTitle>
+                <Trans>CSS rules were dropped during sanitisation</Trans>
+              </AlertTitle>
+
+              <AlertDescription>
+                <ul className="list-disc pl-5">
+                  {cssWarnings.map((warning, index) => (
+                    <li key={index}>
+                      {warning.detail}
+                      {warning.line !== undefined && (
+                        <span className="text-muted-foreground">
+                          {' '}
+                          <Trans>(line {warning.line})</Trans>
+                        </span>
+                      )}
+                    </li>
+                  ))}
+                </ul>
+              </AlertDescription>
+            </Alert>
+          )}
         </section>
       ) : (
         <Alert className="mt-8 flex flex-col justify-between p-6 sm:flex-row sm:items-center" variant="neutral">
diff --git a/apps/remix/app/routes/_authenticated+/t.$teamUrl+/settings.branding.tsx b/apps/remix/app/routes/_authenticated+/t.$teamUrl+/settings.branding.tsx
index 40bd7c3ba..287a91b8b 100644
--- a/apps/remix/app/routes/_authenticated+/t.$teamUrl+/settings.branding.tsx
+++ b/apps/remix/app/routes/_authenticated+/t.$teamUrl+/settings.branding.tsx
@@ -1,9 +1,14 @@
+import { useCurrentOrganisation } from '@documenso/lib/client-only/providers/organisation';
+import { IS_BILLING_ENABLED } from '@documenso/lib/constants/app';
 import { putFile } from '@documenso/lib/universal/upload/put-file';
+import type { SanitizeBrandingCssWarning } from '@documenso/lib/utils/sanitize-branding-css';
 import { trpc } from '@documenso/trpc/react';
+import { Alert, AlertDescription, AlertTitle } from '@documenso/ui/primitives/alert';
 import { useToast } from '@documenso/ui/primitives/use-toast';
-import { msg } from '@lingui/core/macro';
-import { useLingui } from '@lingui/react/macro';
+import { plural } from '@lingui/core/macro';
+import { Trans, useLingui } from '@lingui/react/macro';
 import { Loader } from 'lucide-react';
+import { useState } from 'react';
 
 import {
   BrandingPreferencesForm,
@@ -11,27 +16,32 @@ import {
 } from '~/components/forms/branding-preferences-form';
 import { SettingsHeader } from '~/components/general/settings-header';
 import { useCurrentTeam } from '~/providers/team';
-import { appMetaTags } from '~/utils/meta';
-
-export function meta() {
-  return appMetaTags(msg`Branding Preferences`);
-}
 
 export default function TeamsSettingsPage() {
   const team = useCurrentTeam();
+  const organisation = useCurrentOrganisation();
 
   const { t } = useLingui();
   const { toast } = useToast();
 
-  const { data: teamWithSettings, isLoading: isLoadingTeam } = trpc.team.get.useQuery({
+  const [cssWarnings, setCssWarnings] = useState<SanitizeBrandingCssWarning[]>([]);
+
+  const {
+    data: teamWithSettings,
+    isLoading: isLoadingTeam,
+    refetch: refetchTeam,
+  } = trpc.team.get.useQuery({
     teamReference: team.id,
   });
 
   const { mutateAsync: updateTeamSettings } = trpc.team.settings.update.useMutation();
 
+  const canCustomBranding =
+    organisation.organisationClaim.flags.embedSigningWhiteLabel === true || !IS_BILLING_ENABLED();
+
   const onBrandingPreferencesFormSubmit = async (data: TBrandingPreferencesFormSchema) => {
     try {
-      const { brandingEnabled, brandingLogo, brandingUrl, brandingCompanyDetails } = data;
+      const { brandingEnabled, brandingLogo, brandingUrl, brandingCompanyDetails, brandingColors, brandingCss } = data;
 
       let uploadedBrandingLogo: string | undefined;
 
@@ -44,20 +54,40 @@ export default function TeamsSettingsPage() {
         uploadedBrandingLogo = '';
       }
 
-      await updateTeamSettings({
+      const result = await updateTeamSettings({
         teamId: team.id,
         data: {
           brandingEnabled,
           brandingLogo: uploadedBrandingLogo,
           brandingUrl: brandingUrl || null,
           brandingCompanyDetails: brandingCompanyDetails || null,
+          brandingColors,
+          brandingCss,
         },
       });
 
-      toast({
-        title: t`Branding preferences updated`,
-        description: t`Your branding preferences have been updated`,
-      });
+      // Refetch so the form re-syncs with the sanitised CSS that was
+      // actually persisted (sanitiser may have dropped rules).
+      await refetchTeam();
+
+      const warnings = result?.cssWarnings ?? [];
+      setCssWarnings(warnings);
+
+      if (warnings.length > 0) {
+        toast({
+          title: t`Branding preferences updated with warnings`,
+          description: plural(warnings.length, {
+            one: '# CSS rule was dropped during sanitisation.',
+            other: '# CSS rules were dropped during sanitisation.',
+          }),
+          duration: 8000,
+        });
+      } else {
+        toast({
+          title: t`Branding preferences updated`,
+          description: t`Your branding preferences have been updated`,
+        });
+      }
     } catch (err) {
       toast({
         title: t`Something went wrong`,
@@ -85,10 +115,35 @@ export default function TeamsSettingsPage() {
       <section>
         <BrandingPreferencesForm
           canInherit={true}
+          hasAdvancedBranding={canCustomBranding}
           context="Team"
           settings={teamWithSettings.teamSettings}
           onFormSubmit={onBrandingPreferencesFormSubmit}
         />
+
+        {cssWarnings.length > 0 && (
+          <Alert variant="warning" className="mt-6">
+            <AlertTitle>
+              <Trans>CSS rules were dropped during sanitisation</Trans>
+            </AlertTitle>
+
+            <AlertDescription>
+              <ul className="list-disc pl-5">
+                {cssWarnings.map((warning, index) => (
+                  <li key={index}>
+                    {warning.detail}
+                    {warning.line !== undefined && (
+                      <span className="text-muted-foreground">
+                        {' '}
+                        <Trans>(line {warning.line})</Trans>
+                      </span>
+                    )}
+                  </li>
+                ))}
+              </ul>
+            </AlertDescription>
+          </Alert>
+        )}
       </section>
     </div>
   );
diff --git a/apps/remix/app/routes/_recipient+/d.$token+/_index.tsx b/apps/remix/app/routes/_recipient+/d.$token+/_index.tsx
index 824983053..bd7b34383 100644
--- a/apps/remix/app/routes/_recipient+/d.$token+/_index.tsx
+++ b/apps/remix/app/routes/_recipient+/d.$token+/_index.tsx
@@ -2,6 +2,7 @@ import { getOptionalSession } from '@documenso/auth/server/lib/utils/get-session
 import { EnvelopeRenderProvider } from '@documenso/lib/client-only/providers/envelope-render-provider';
 import { useOptionalSession } from '@documenso/lib/client-only/providers/session';
 import { AppError, AppErrorCode } from '@documenso/lib/errors/app-error';
+import { loadRecipientBrandingByTeamId } from '@documenso/lib/server-only/branding/load-recipient-branding';
 import { getEnvelopeForDirectTemplateSigning } from '@documenso/lib/server-only/envelope/get-envelope-for-direct-template-signing';
 import { getTemplateByDirectLinkToken } from '@documenso/lib/server-only/template/get-template-by-direct-link-token';
 import { DocumentAccessAuth } from '@documenso/lib/types/document-auth';
@@ -20,6 +21,8 @@ import { DocumentSigningAuthProvider } from '~/components/general/document-signi
 import { DocumentSigningPageViewV2 } from '~/components/general/document-signing/document-signing-page-view-v2';
 import { DocumentSigningProvider } from '~/components/general/document-signing/document-signing-provider';
 import { EnvelopeSigningProvider } from '~/components/general/document-signing/envelope-signing-provider';
+import { RecipientBranding } from '~/components/general/recipient-branding';
+import { useCspNonce } from '~/utils/nonce';
 import { superLoaderJson, useSuperLoaderData } from '~/utils/super-json-loader';
 
 import type { Route } from './+types/_index';
@@ -125,6 +128,7 @@ export async function loader(loaderArgs: Route.LoaderArgs) {
     },
     select: {
       internalVersion: true,
+      teamId: true,
     },
   });
 
@@ -132,12 +136,17 @@ export async function loader(loaderArgs: Route.LoaderArgs) {
     throw new Response('Not Found', { status: 404 });
   }
 
+  const branding = await loadRecipientBrandingByTeamId({
+    teamId: directEnvelope.teamId,
+  });
+
   if (directEnvelope.internalVersion === 2) {
     const payloadV2 = await handleV2Loader(loaderArgs);
 
     return superLoaderJson({
       version: 2,
       payload: payloadV2,
+      branding,
     } as const);
   }
 
@@ -146,17 +155,20 @@ export async function loader(loaderArgs: Route.LoaderArgs) {
   return superLoaderJson({
     version: 1,
     payload: payloadV1,
+    branding,
   } as const);
 }
 
 export default function DirectTemplatePage() {
   const data = useSuperLoaderData<typeof loader>();
+  const cspNonce = useCspNonce();
 
-  if (data.version === 2) {
-    return <DirectSigningPageV2 data={data.payload} />;
-  }
-
-  return <DirectSigningPageV1 data={data.payload} />;
+  return (
+    <>
+      <RecipientBranding branding={data.branding} cspNonce={cspNonce} />
+      {data.version === 2 ? <DirectSigningPageV2 data={data.payload} /> : <DirectSigningPageV1 data={data.payload} />}
+    </>
+  );
 }
 
 const DirectSigningPageV1 = ({ data }: { data: Awaited<ReturnType<typeof handleV1Loader>> }) => {
diff --git a/apps/remix/app/routes/_recipient+/sign.$token+/_index.tsx b/apps/remix/app/routes/_recipient+/sign.$token+/_index.tsx
index 2cc697ea4..0d3459a1f 100644
--- a/apps/remix/app/routes/_recipient+/sign.$token+/_index.tsx
+++ b/apps/remix/app/routes/_recipient+/sign.$token+/_index.tsx
@@ -3,6 +3,7 @@ import { getOptionalSession } from '@documenso/auth/server/lib/utils/get-session
 import { EnvelopeRenderProvider } from '@documenso/lib/client-only/providers/envelope-render-provider';
 import { useOptionalSession } from '@documenso/lib/client-only/providers/session';
 import { AppError, AppErrorCode } from '@documenso/lib/errors/app-error';
+import { loadRecipientBrandingByTeamId } from '@documenso/lib/server-only/branding/load-recipient-branding';
 import { getDocumentAndSenderByToken } from '@documenso/lib/server-only/document/get-document-by-token';
 import { viewedDocument } from '@documenso/lib/server-only/document/viewed-document';
 import { getEnvelopeForRecipientSigning } from '@documenso/lib/server-only/envelope/get-envelope-for-recipient-signing';
@@ -35,6 +36,8 @@ import { DocumentSigningPageViewV1 } from '~/components/general/document-signing
 import { DocumentSigningPageViewV2 } from '~/components/general/document-signing/document-signing-page-view-v2';
 import { DocumentSigningProvider } from '~/components/general/document-signing/document-signing-provider';
 import { EnvelopeSigningProvider } from '~/components/general/document-signing/envelope-signing-provider';
+import { RecipientBranding } from '~/components/general/recipient-branding';
+import { useCspNonce } from '~/utils/nonce';
 import { superLoaderJson, useSuperLoaderData } from '~/utils/super-json-loader';
 
 import type { Route } from './+types/_index';
@@ -272,6 +275,7 @@ export async function loader(loaderArgs: Route.LoaderArgs) {
       envelope: {
         select: {
           internalVersion: true,
+          teamId: true,
         },
       },
     },
@@ -281,12 +285,17 @@ export async function loader(loaderArgs: Route.LoaderArgs) {
     throw new Response('Not Found', { status: 404 });
   }
 
+  const branding = await loadRecipientBrandingByTeamId({
+    teamId: foundRecipient.envelope.teamId,
+  });
+
   if (foundRecipient.envelope.internalVersion === 2) {
     const payloadV2 = await handleV2Loader(loaderArgs);
 
     return superLoaderJson({
       version: 2,
       payload: payloadV2,
+      branding,
     } as const);
   }
 
@@ -295,17 +304,20 @@ export async function loader(loaderArgs: Route.LoaderArgs) {
   return superLoaderJson({
     version: 1,
     payload: payloadV1,
+    branding,
   } as const);
 }
 
 export default function SigningPage() {
   const data = useSuperLoaderData<typeof loader>();
+  const cspNonce = useCspNonce();
 
-  if (data.version === 2) {
-    return <SigningPageV2 data={data.payload} />;
-  }
-
-  return <SigningPageV1 data={data.payload} />;
+  return (
+    <>
+      <RecipientBranding branding={data.branding} cspNonce={cspNonce} />
+      {data.version === 2 ? <SigningPageV2 data={data.payload} /> : <SigningPageV1 data={data.payload} />}
+    </>
+  );
 }
 
 const SigningPageV1 = ({ data }: { data: Awaited<ReturnType<typeof handleV1Loader>> }) => {
diff --git a/apps/remix/app/routes/_recipient+/sign.$token+/complete.tsx b/apps/remix/app/routes/_recipient+/sign.$token+/complete.tsx
index ed57ba9b7..881d75238 100644
--- a/apps/remix/app/routes/_recipient+/sign.$token+/complete.tsx
+++ b/apps/remix/app/routes/_recipient+/sign.$token+/complete.tsx
@@ -2,6 +2,7 @@ import signingCelebration from '@documenso/assets/images/signing-celebration.png
 import { getOptionalSession } from '@documenso/auth/server/lib/utils/get-session';
 import { useOptionalSession } from '@documenso/lib/client-only/providers/session';
 import { isSignupEnabledForProvider } from '@documenso/lib/constants/auth';
+import { loadRecipientBrandingByTeamId } from '@documenso/lib/server-only/branding/load-recipient-branding';
 import { getDocumentAndSenderByToken } from '@documenso/lib/server-only/document/get-document-by-token';
 import { isRecipientAuthorized } from '@documenso/lib/server-only/document/is-recipient-authorized';
 import { getFieldsForToken } from '@documenso/lib/server-only/field/get-fields-for-token';
@@ -25,6 +26,8 @@ import { match } from 'ts-pattern';
 import { EnvelopeDownloadDialog } from '~/components/dialogs/envelope-download-dialog';
 import { ClaimAccount } from '~/components/general/claim-account';
 import { DocumentSigningAuthPageView } from '~/components/general/document-signing/document-signing-auth-page';
+import { RecipientBranding } from '~/components/general/recipient-branding';
+import { useCspNonce } from '~/utils/nonce';
 
 import type { Route } from './+types/complete';
 
@@ -46,6 +49,8 @@ export async function loader({ params, request }: Route.LoaderArgs) {
     throw new Response('Not Found', { status: 404 });
   }
 
+  const branding = await loadRecipientBrandingByTeamId({ teamId: document.teamId });
+
   const [fields, recipient] = await Promise.all([
     getFieldsForToken({ token }),
     getRecipientByToken({ token }).catch(() => null),
@@ -66,6 +71,7 @@ export async function loader({ params, request }: Route.LoaderArgs) {
     return {
       isDocumentAccessValid: false,
       recipientEmail: recipient.email,
+      branding,
     } as const;
   }
 
@@ -92,6 +98,7 @@ export async function loader({ params, request }: Route.LoaderArgs) {
     document,
     recipient,
     returnToHomePath,
+    branding,
   };
 }
 
@@ -100,6 +107,7 @@ export default function CompletedSigningPage({ loaderData }: Route.ComponentProp
 
   const { sessionData } = useOptionalSession();
   const user = sessionData?.user;
+  const cspNonce = useCspNonce();
 
   const {
     isDocumentAccessValid,
@@ -110,6 +118,7 @@ export default function CompletedSigningPage({ loaderData }: Route.ComponentProp
     recipient,
     recipientEmail,
     returnToHomePath,
+    branding,
   } = loaderData;
 
   // Poll signing status every few seconds
@@ -131,154 +140,163 @@ export default function CompletedSigningPage({ loaderData }: Route.ComponentProp
   const signingStatus = signingStatusData?.status ?? 'PENDING';
 
   if (!isDocumentAccessValid) {
-    return <DocumentSigningAuthPageView email={recipientEmail} />;
+    return (
+      <>
+        <RecipientBranding branding={branding} cspNonce={cspNonce} />
+        <DocumentSigningAuthPageView email={recipientEmail} />
+      </>
+    );
   }
 
   return (
-    <div
-      className={cn('-mx-4 flex flex-col items-center overflow-hidden px-4 pt-16 md:-mx-8 md:px-8 lg:pt-20 xl:pt-28', {
-        'pt-0 lg:pt-0 xl:pt-0': canSignUp,
-      })}
-    >
+    <>
+      <RecipientBranding branding={branding} cspNonce={cspNonce} />
       <div
-        className={cn('relative mt-6 flex w-full flex-col items-center justify-center', {
-          'mt-0 flex-col divide-y overflow-hidden pt-6 md:pt-16 lg:flex-row lg:divide-x lg:divide-y-0 lg:pt-20 xl:pt-24':
-            canSignUp,
-        })}
+        className={cn(
+          '-mx-4 flex flex-col items-center overflow-hidden px-4 pt-16 md:-mx-8 md:px-8 lg:pt-20 xl:pt-28',
+          { 'pt-0 lg:pt-0 xl:pt-0': canSignUp },
+        )}
       >
         <div
-          className={cn('flex flex-col items-center', {
-            'mb-8 p-4 md:mb-0 md:p-12': canSignUp,
+          className={cn('relative mt-6 flex w-full flex-col items-center justify-center', {
+            'mt-0 flex-col divide-y overflow-hidden pt-6 md:pt-16 lg:flex-row lg:divide-x lg:divide-y-0 lg:pt-20 xl:pt-24':
+              canSignUp,
           })}
         >
-          <Badge variant="neutral" size="default" className="mb-6 rounded-xl border bg-transparent">
-            <span className="block max-w-[10rem] truncate font-medium hover:underline md:max-w-[20rem]">
-              {document.title}
-            </span>
-          </Badge>
+          <div
+            className={cn('flex flex-col items-center', {
+              'mb-8 p-4 md:mb-0 md:p-12': canSignUp,
+            })}
+          >
+            <Badge variant="neutral" size="default" className="mb-6 rounded-xl border bg-transparent">
+              <span className="block max-w-[10rem] truncate font-medium hover:underline md:max-w-[20rem]">
+                {document.title}
+              </span>
+            </Badge>
 
-          {/* Card with recipient */}
-          <SigningCard3D
-            name={recipientName}
-            signature={signatures.at(0)}
-            signingCelebrationImage={signingCelebration}
-          />
-
-          <h2 className="mt-6 max-w-[35ch] text-center font-semibold text-2xl leading-normal md:text-3xl lg:text-4xl">
-            {recipient.role === RecipientRole.SIGNER && <Trans>Document Signed</Trans>}
-            {recipient.role === RecipientRole.VIEWER && <Trans>Document Viewed</Trans>}
-            {recipient.role === RecipientRole.APPROVER && <Trans>Document Approved</Trans>}
-          </h2>
-
-          {match({ status: signingStatus, deletedAt: document.deletedAt })
-            .with({ status: 'COMPLETED' }, () => (
-              <div className="mt-4 flex items-center text-center text-documenso-700">
-                <CheckCircle2 className="mr-2 h-5 w-5" />
-                <span className="text-sm">
-                  <Trans>Everyone has signed</Trans>
-                </span>
-              </div>
-            ))
-            .with({ status: 'PROCESSING' }, () => (
-              <div className="mt-4 flex items-center text-center text-orange-600">
-                <Loader2 className="mr-2 h-5 w-5 animate-spin" />
-                <span className="text-sm">
-                  <Trans>Processing document</Trans>
-                </span>
-              </div>
-            ))
-            .with({ deletedAt: null }, () => (
-              <div className="mt-4 flex items-center text-center text-blue-600">
-                <Clock8 className="mr-2 h-5 w-5" />
-                <span className="text-sm">
-                  <Trans>Waiting for others to sign</Trans>
-                </span>
-              </div>
-            ))
-            .otherwise(() => (
-              <div className="flex items-center text-center text-red-600">
-                <Clock8 className="mr-2 h-5 w-5" />
-                <span className="text-sm">
-                  <Trans>Document no longer available to sign</Trans>
-                </span>
-              </div>
-            ))}
-
-          {match({ status: signingStatus, deletedAt: document.deletedAt })
-            .with({ status: 'COMPLETED' }, () => (
-              <p className="mt-2.5 max-w-[60ch] text-center font-medium text-muted-foreground/60 text-sm md:text-base">
-                <Trans>Everyone has signed! You will receive an email copy of the signed document.</Trans>
-              </p>
-            ))
-            .with({ status: 'PROCESSING' }, () => (
-              <p className="mt-2.5 max-w-[60ch] text-center font-medium text-muted-foreground/60 text-sm md:text-base">
-                <Trans>
-                  All recipients have signed. The document is being processed and you will receive an email copy
-                  shortly.
-                </Trans>
-              </p>
-            ))
-            .with({ deletedAt: null }, () => (
-              <p className="mt-2.5 max-w-[60ch] text-center font-medium text-muted-foreground/60 text-sm md:text-base">
-                <Trans>You will receive an email copy of the signed document once everyone has signed.</Trans>
-              </p>
-            ))
-            .otherwise(() => (
-              <p className="mt-2.5 max-w-[60ch] text-center font-medium text-muted-foreground/60 text-sm md:text-base">
-                <Trans>
-                  This document has been cancelled by the owner and is no longer available for others to sign.
-                </Trans>
-              </p>
-            ))}
-
-          <div className="mt-8 flex w-full max-w-xs flex-col items-stretch gap-4 md:w-auto md:max-w-none md:flex-row md:items-center">
-            <DocumentShareButton
-              documentId={document.id}
-              token={recipient.token}
-              className="w-full max-w-none md:flex-1"
+            {/* Card with recipient */}
+            <SigningCard3D
+              name={recipientName}
+              signature={signatures.at(0)}
+              signingCelebrationImage={signingCelebration}
             />
 
-            {isDocumentCompleted(document) && (
-              <EnvelopeDownloadDialog
-                envelopeId={document.envelopeId}
-                envelopeStatus={document.status}
-                envelopeItems={document.envelopeItems}
-                token={recipient?.token}
-                trigger={
-                  <Button type="button" variant="outline" className="flex-1 md:flex-initial">
-                    <DownloadIcon className="mr-2 h-5 w-5" />
-                    <Trans>Download</Trans>
-                  </Button>
-                }
-              />
-            )}
+            <h2 className="mt-6 max-w-[35ch] text-center font-semibold text-2xl leading-normal md:text-3xl lg:text-4xl">
+              {recipient.role === RecipientRole.SIGNER && <Trans>Document Signed</Trans>}
+              {recipient.role === RecipientRole.VIEWER && <Trans>Document Viewed</Trans>}
+              {recipient.role === RecipientRole.APPROVER && <Trans>Document Approved</Trans>}
+            </h2>
 
-            {user && (
-              <Button asChild>
-                <Link to={returnToHomePath}>
-                  <Trans>Go Back Home</Trans>
-                </Link>
-              </Button>
+            {match({ status: signingStatus, deletedAt: document.deletedAt })
+              .with({ status: 'COMPLETED' }, () => (
+                <div className="mt-4 flex items-center text-center text-documenso-700">
+                  <CheckCircle2 className="mr-2 h-5 w-5" />
+                  <span className="text-sm">
+                    <Trans>Everyone has signed</Trans>
+                  </span>
+                </div>
+              ))
+              .with({ status: 'PROCESSING' }, () => (
+                <div className="mt-4 flex items-center text-center text-orange-600">
+                  <Loader2 className="mr-2 h-5 w-5 animate-spin" />
+                  <span className="text-sm">
+                    <Trans>Processing document</Trans>
+                  </span>
+                </div>
+              ))
+              .with({ deletedAt: null }, () => (
+                <div className="mt-4 flex items-center text-center text-blue-600">
+                  <Clock8 className="mr-2 h-5 w-5" />
+                  <span className="text-sm">
+                    <Trans>Waiting for others to sign</Trans>
+                  </span>
+                </div>
+              ))
+              .otherwise(() => (
+                <div className="flex items-center text-center text-red-600">
+                  <Clock8 className="mr-2 h-5 w-5" />
+                  <span className="text-sm">
+                    <Trans>Document no longer available to sign</Trans>
+                  </span>
+                </div>
+              ))}
+
+            {match({ status: signingStatus, deletedAt: document.deletedAt })
+              .with({ status: 'COMPLETED' }, () => (
+                <p className="mt-2.5 max-w-[60ch] text-center font-medium text-muted-foreground/60 text-sm md:text-base">
+                  <Trans>Everyone has signed! You will receive an email copy of the signed document.</Trans>
+                </p>
+              ))
+              .with({ status: 'PROCESSING' }, () => (
+                <p className="mt-2.5 max-w-[60ch] text-center font-medium text-muted-foreground/60 text-sm md:text-base">
+                  <Trans>
+                    All recipients have signed. The document is being processed and you will receive an email copy
+                    shortly.
+                  </Trans>
+                </p>
+              ))
+              .with({ deletedAt: null }, () => (
+                <p className="mt-2.5 max-w-[60ch] text-center font-medium text-muted-foreground/60 text-sm md:text-base">
+                  <Trans>You will receive an email copy of the signed document once everyone has signed.</Trans>
+                </p>
+              ))
+              .otherwise(() => (
+                <p className="mt-2.5 max-w-[60ch] text-center font-medium text-muted-foreground/60 text-sm md:text-base">
+                  <Trans>
+                    This document has been cancelled by the owner and is no longer available for others to sign.
+                  </Trans>
+                </p>
+              ))}
+
+            <div className="mt-8 flex w-full max-w-xs flex-col items-stretch gap-4 md:w-auto md:max-w-none md:flex-row md:items-center">
+              <DocumentShareButton
+                documentId={document.id}
+                token={recipient.token}
+                className="w-full max-w-none md:flex-1"
+              />
+
+              {isDocumentCompleted(document) && (
+                <EnvelopeDownloadDialog
+                  envelopeId={document.envelopeId}
+                  envelopeStatus={document.status}
+                  envelopeItems={document.envelopeItems}
+                  token={recipient?.token}
+                  trigger={
+                    <Button type="button" variant="outline" className="flex-1 md:flex-initial">
+                      <DownloadIcon className="mr-2 h-5 w-5" />
+                      <Trans>Download</Trans>
+                    </Button>
+                  }
+                />
+              )}
+
+              {user && (
+                <Button asChild>
+                  <Link to={returnToHomePath}>
+                    <Trans>Go Back Home</Trans>
+                  </Link>
+                </Button>
+              )}
+            </div>
+          </div>
+
+          <div className="flex flex-col items-center">
+            {canSignUp && (
+              <div className="flex max-w-xl flex-col items-center justify-center p-4 md:p-12">
+                <h2 className="mt-8 text-center font-semibold text-xl md:mt-0">
+                  <Trans>Need to sign documents?</Trans>
+                </h2>
+
+                <p className="mt-4 max-w-[55ch] text-center text-muted-foreground/60 leading-normal">
+                  <Trans>Create your account and start using state-of-the-art document signing.</Trans>
+                </p>
+
+                <ClaimAccount defaultName={recipientName} defaultEmail={recipient.email} />
+              </div>
             )}
           </div>
         </div>
-
-        <div className="flex flex-col items-center">
-          {canSignUp && (
-            <div className="flex max-w-xl flex-col items-center justify-center p-4 md:p-12">
-              <h2 className="mt-8 text-center font-semibold text-xl md:mt-0">
-                <Trans>Need to sign documents?</Trans>
-              </h2>
-
-              <p className="mt-4 max-w-[55ch] text-center text-muted-foreground/60 leading-normal">
-                <Trans>Create your account and start using state-of-the-art document signing.</Trans>
-              </p>
-
-              <ClaimAccount defaultName={recipientName} defaultEmail={recipient.email} />
-            </div>
-          )}
-        </div>
       </div>
-    </div>
+    </>
   );
 }
diff --git a/apps/remix/app/routes/_recipient+/sign.$token+/expired.tsx b/apps/remix/app/routes/_recipient+/sign.$token+/expired.tsx
index ed1030443..90f9dc27d 100644
--- a/apps/remix/app/routes/_recipient+/sign.$token+/expired.tsx
+++ b/apps/remix/app/routes/_recipient+/sign.$token+/expired.tsx
@@ -1,5 +1,6 @@
 import { getOptionalSession } from '@documenso/auth/server/lib/utils/get-session';
 import { useOptionalSession } from '@documenso/lib/client-only/providers/session';
+import { loadRecipientBrandingByTeamId } from '@documenso/lib/server-only/branding/load-recipient-branding';
 import { getDocumentAndSenderByToken } from '@documenso/lib/server-only/document/get-document-by-token';
 import { isRecipientAuthorized } from '@documenso/lib/server-only/document/is-recipient-authorized';
 import { getRecipientByToken } from '@documenso/lib/server-only/recipient/get-recipient-by-token';
@@ -10,6 +11,8 @@ import { TimerOffIcon } from 'lucide-react';
 import { Link } from 'react-router';
 
 import { DocumentSigningAuthPageView } from '~/components/general/document-signing/document-signing-auth-page';
+import { RecipientBranding } from '~/components/general/recipient-branding';
+import { useCspNonce } from '~/utils/nonce';
 import { truncateTitle } from '~/utils/truncate-title';
 
 import type { Route } from './+types/expired';
@@ -32,6 +35,8 @@ export async function loader({ params, request }: Route.LoaderArgs) {
     throw new Response('Not Found', { status: 404 });
   }
 
+  const branding = await loadRecipientBrandingByTeamId({ teamId: document.teamId });
+
   const title = document.title;
 
   const recipient = await getRecipientByToken({ token }).catch(() => null);
@@ -54,55 +59,66 @@ export async function loader({ params, request }: Route.LoaderArgs) {
       isDocumentAccessValid: true,
       recipientEmail,
       title,
+      branding,
     };
   }
 
   return {
     isDocumentAccessValid: false,
     recipientEmail,
+    branding,
   };
 }
 
 export default function ExpiredSigningPage({ loaderData }: Route.ComponentProps) {
   const { sessionData } = useOptionalSession();
   const user = sessionData?.user;
+  const cspNonce = useCspNonce();
 
-  const { isDocumentAccessValid, recipientEmail, title } = loaderData;
+  const { isDocumentAccessValid, recipientEmail, title, branding } = loaderData;
 
   if (!isDocumentAccessValid) {
-    return <DocumentSigningAuthPageView email={recipientEmail} />;
+    return (
+      <>
+        <RecipientBranding branding={branding} cspNonce={cspNonce} />
+        <DocumentSigningAuthPageView email={recipientEmail} />
+      </>
+    );
   }
 
   return (
-    <div className="flex flex-col items-center pt-24 lg:pt-36 xl:pt-44">
-      <Badge variant="neutral" size="default" title={title} className="mb-6 rounded-xl border bg-transparent">
-        {truncateTitle(title ?? '')}
-      </Badge>
+    <>
+      <RecipientBranding branding={branding} cspNonce={cspNonce} />
+      <div className="flex flex-col items-center pt-24 lg:pt-36 xl:pt-44">
+        <Badge variant="neutral" size="default" title={title} className="mb-6 rounded-xl border bg-transparent">
+          {truncateTitle(title ?? '')}
+        </Badge>
 
-      <div className="flex flex-col items-center">
-        <div className="flex items-center gap-x-4">
-          <TimerOffIcon className="h-10 w-10 text-orange-500" />
+        <div className="flex flex-col items-center">
+          <div className="flex items-center gap-x-4">
+            <TimerOffIcon className="h-10 w-10 text-orange-500" />
 
-          <h2 className="max-w-[35ch] text-center font-semibold text-2xl leading-normal md:text-3xl lg:text-4xl">
-            <Trans>Signing Deadline Expired</Trans>
-          </h2>
+            <h2 className="max-w-[35ch] text-center font-semibold text-2xl leading-normal md:text-3xl lg:text-4xl">
+              <Trans>Signing Deadline Expired</Trans>
+            </h2>
+          </div>
+
+          <p className="mt-6 max-w-[60ch] text-center text-muted-foreground text-sm">
+            <Trans>
+              The signing deadline for this document has passed. Please contact the document owner if you need a new
+              copy to sign.
+            </Trans>
+          </p>
+
+          {user && (
+            <Button className="mt-6" asChild>
+              <Link to={`/`}>
+                <Trans>Return Home</Trans>
+              </Link>
+            </Button>
+          )}
         </div>
-
-        <p className="mt-6 max-w-[60ch] text-center text-muted-foreground text-sm">
-          <Trans>
-            The signing deadline for this document has passed. Please contact the document owner if you need a new copy
-            to sign.
-          </Trans>
-        </p>
-
-        {user && (
-          <Button className="mt-6" asChild>
-            <Link to={`/`}>
-              <Trans>Return Home</Trans>
-            </Link>
-          </Button>
-        )}
       </div>
-    </div>
+    </>
   );
 }
diff --git a/apps/remix/app/routes/_recipient+/sign.$token+/rejected.tsx b/apps/remix/app/routes/_recipient+/sign.$token+/rejected.tsx
index 83c430605..4fa6bf078 100644
--- a/apps/remix/app/routes/_recipient+/sign.$token+/rejected.tsx
+++ b/apps/remix/app/routes/_recipient+/sign.$token+/rejected.tsx
@@ -1,5 +1,6 @@
 import { getOptionalSession } from '@documenso/auth/server/lib/utils/get-session';
 import { useOptionalSession } from '@documenso/lib/client-only/providers/session';
+import { loadRecipientBrandingByTeamId } from '@documenso/lib/server-only/branding/load-recipient-branding';
 import { getDocumentAndSenderByToken } from '@documenso/lib/server-only/document/get-document-by-token';
 import { isRecipientAuthorized } from '@documenso/lib/server-only/document/is-recipient-authorized';
 import { getFieldsForToken } from '@documenso/lib/server-only/field/get-fields-for-token';
@@ -12,6 +13,8 @@ import { XCircle } from 'lucide-react';
 import { Link } from 'react-router';
 
 import { DocumentSigningAuthPageView } from '~/components/general/document-signing/document-signing-auth-page';
+import { RecipientBranding } from '~/components/general/recipient-branding';
+import { useCspNonce } from '~/utils/nonce';
 import { truncateTitle } from '~/utils/truncate-title';
 
 import type { Route } from './+types/rejected';
@@ -34,6 +37,8 @@ export async function loader({ params, request }: Route.LoaderArgs) {
     throw new Response('Not Found', { status: 404 });
   }
 
+  const branding = await loadRecipientBrandingByTeamId({ teamId: document.teamId });
+
   const truncatedTitle = truncateTitle(document.title);
 
   const [fields, recipient] = await Promise.all([
@@ -60,6 +65,7 @@ export async function loader({ params, request }: Route.LoaderArgs) {
       isDocumentAccessValid: true,
       recipientReference,
       truncatedTitle,
+      branding,
     };
   }
 
@@ -67,57 +73,67 @@ export async function loader({ params, request }: Route.LoaderArgs) {
   return {
     isDocumentAccessValid: false,
     recipientReference,
+    branding,
   };
 }
 
 export default function RejectedSigningPage({ loaderData }: Route.ComponentProps) {
   const { sessionData } = useOptionalSession();
   const user = sessionData?.user;
+  const cspNonce = useCspNonce();
 
-  const { isDocumentAccessValid, recipientReference, truncatedTitle } = loaderData;
+  const { isDocumentAccessValid, recipientReference, truncatedTitle, branding } = loaderData;
 
   if (!isDocumentAccessValid) {
-    return <DocumentSigningAuthPageView email={recipientReference} />;
+    return (
+      <>
+        <RecipientBranding branding={branding} cspNonce={cspNonce} />
+        <DocumentSigningAuthPageView email={recipientReference} />
+      </>
+    );
   }
 
   return (
-    <div className="flex flex-col items-center pt-24 lg:pt-36 xl:pt-44">
-      <Badge variant="neutral" size="default" className="mb-6 rounded-xl border bg-transparent">
-        {truncatedTitle}
-      </Badge>
+    <>
+      <RecipientBranding branding={branding} cspNonce={cspNonce} />
+      <div className="flex flex-col items-center pt-24 lg:pt-36 xl:pt-44">
+        <Badge variant="neutral" size="default" className="mb-6 rounded-xl border bg-transparent">
+          {truncatedTitle}
+        </Badge>
 
-      <div className="flex flex-col items-center">
-        <div className="flex items-center gap-x-4">
-          <XCircle className="h-10 w-10 text-destructive" />
+        <div className="flex flex-col items-center">
+          <div className="flex items-center gap-x-4">
+            <XCircle className="h-10 w-10 text-destructive" />
 
-          <h2 className="max-w-[35ch] text-center font-semibold text-2xl leading-normal md:text-3xl lg:text-4xl">
-            <Trans>Document Rejected</Trans>
-          </h2>
+            <h2 className="max-w-[35ch] text-center font-semibold text-2xl leading-normal md:text-3xl lg:text-4xl">
+              <Trans>Document Rejected</Trans>
+            </h2>
+          </div>
+
+          <div className="mt-4 flex items-center text-center text-destructive text-sm">
+            <Trans>You have rejected this document</Trans>
+          </div>
+
+          <p className="mt-6 max-w-[60ch] text-center text-muted-foreground text-sm">
+            <Trans>
+              The document owner has been notified of your decision. They may contact you with further instructions if
+              necessary.
+            </Trans>
+          </p>
+
+          <p className="mt-2 max-w-[60ch] text-center text-muted-foreground text-sm">
+            <Trans>No further action is required from you at this time.</Trans>
+          </p>
+
+          {user && (
+            <Button className="mt-6" asChild>
+              <Link to={`/`}>
+                <Trans>Return Home</Trans>
+              </Link>
+            </Button>
+          )}
         </div>
-
-        <div className="mt-4 flex items-center text-center text-destructive text-sm">
-          <Trans>You have rejected this document</Trans>
-        </div>
-
-        <p className="mt-6 max-w-[60ch] text-center text-muted-foreground text-sm">
-          <Trans>
-            The document owner has been notified of your decision. They may contact you with further instructions if
-            necessary.
-          </Trans>
-        </p>
-
-        <p className="mt-2 max-w-[60ch] text-center text-muted-foreground text-sm">
-          <Trans>No further action is required from you at this time.</Trans>
-        </p>
-
-        {user && (
-          <Button className="mt-6" asChild>
-            <Link to={`/`}>
-              <Trans>Return Home</Trans>
-            </Link>
-          </Button>
-        )}
       </div>
-    </div>
+    </>
   );
 }
diff --git a/apps/remix/app/routes/_recipient+/sign.$token+/waiting.tsx b/apps/remix/app/routes/_recipient+/sign.$token+/waiting.tsx
index ecb2da192..c669bc3f6 100644
--- a/apps/remix/app/routes/_recipient+/sign.$token+/waiting.tsx
+++ b/apps/remix/app/routes/_recipient+/sign.$token+/waiting.tsx
@@ -1,4 +1,5 @@
 import { getOptionalSession } from '@documenso/auth/server/lib/utils/get-session';
+import { loadRecipientBrandingByTeamId } from '@documenso/lib/server-only/branding/load-recipient-branding';
 import { getDocumentAndSenderByToken } from '@documenso/lib/server-only/document/get-document-by-token';
 import { getEnvelopeById } from '@documenso/lib/server-only/envelope/get-envelope-by-id';
 import { getRecipientByToken } from '@documenso/lib/server-only/recipient/get-recipient-by-token';
@@ -10,6 +11,9 @@ import type { Team } from '@prisma/client';
 import { DocumentStatus, EnvelopeType } from '@prisma/client';
 import { Link, redirect } from 'react-router';
 
+import { RecipientBranding } from '~/components/general/recipient-branding';
+import { useCspNonce } from '~/utils/nonce';
+
 import type { Route } from './+types/waiting';
 
 export async function loader({ params, request }: Route.LoaderArgs) {
@@ -61,48 +65,55 @@ export async function loader({ params, request }: Route.LoaderArgs) {
 
   const documentPathForEditing = isOwnerOrTeamMember && team ? formatDocumentsPath(team.url) + '/' + document.id : null;
 
+  const branding = await loadRecipientBrandingByTeamId({ teamId: document.teamId });
+
   return {
     documentPathForEditing,
+    branding,
   };
 }
 
 export default function WaitingForTurnToSignPage({ loaderData }: Route.ComponentProps) {
-  const { documentPathForEditing } = loaderData;
+  const { documentPathForEditing, branding } = loaderData;
+  const cspNonce = useCspNonce();
 
   return (
-    <div className="relative flex flex-col items-center justify-center px-4 py-12 sm:px-6 lg:px-8">
-      <div className="w-full max-w-md text-center">
-        <h2 className="font-bold text-3xl tracking-tigh">
-          <Trans>Waiting for Your Turn</Trans>
-        </h2>
+    <>
+      <RecipientBranding branding={branding} cspNonce={cspNonce} />
+      <div className="relative flex flex-col items-center justify-center px-4 py-12 sm:px-6 lg:px-8">
+        <div className="w-full max-w-md text-center">
+          <h2 className="font-bold text-3xl tracking-tigh">
+            <Trans>Waiting for Your Turn</Trans>
+          </h2>
 
-        <p className="mt-2 text-muted-foreground text-sm">
-          <Trans>
-            It's currently not your turn to sign. You will receive an email with instructions once it's your turn to
-            sign the document.
-          </Trans>
-        </p>
+          <p className="mt-2 text-muted-foreground text-sm">
+            <Trans>
+              It's currently not your turn to sign. You will receive an email with instructions once it's your turn to
+              sign the document.
+            </Trans>
+          </p>
 
-        <p className="mt-4 text-muted-foreground text-sm">
-          <Trans>Please check your email for updates.</Trans>
-        </p>
+          <p className="mt-4 text-muted-foreground text-sm">
+            <Trans>Please check your email for updates.</Trans>
+          </p>
 
-        <div className="mt-4">
-          {documentPathForEditing ? (
-            <Button variant="link" asChild>
-              <Link to={documentPathForEditing}>
-                <Trans>Were you trying to edit this document instead?</Trans>
-              </Link>
-            </Button>
-          ) : (
-            <Button variant="link" asChild>
-              <Link to="/">
-                <Trans>Return Home</Trans>
-              </Link>
-            </Button>
-          )}
+          <div className="mt-4">
+            {documentPathForEditing ? (
+              <Button variant="link" asChild>
+                <Link to={documentPathForEditing}>
+                  <Trans>Were you trying to edit this document instead?</Trans>
+                </Link>
+              </Button>
+            ) : (
+              <Button variant="link" asChild>
+                <Link to="/">
+                  <Trans>Return Home</Trans>
+                </Link>
+              </Button>
+            )}
+          </div>
         </div>
       </div>
-    </div>
+    </>
   );
 }
diff --git a/apps/remix/app/utils/css-vars.ts b/apps/remix/app/utils/css-vars.ts
index e7ae76eb9..009fa3f1a 100644
--- a/apps/remix/app/utils/css-vars.ts
+++ b/apps/remix/app/utils/css-vars.ts
@@ -1,4 +1,4 @@
-import type { TCssVarsSchema } from '@documenso/lib/types/css-vars';
+import { CSS_LENGTH_REGEX, type TCssVarsSchema } from '@documenso/lib/types/css-vars';
 import { colord } from 'colord';
 import { toKebabCase } from 'remeda';
 
@@ -12,23 +12,50 @@ export const toNativeCssVars = (vars: TCssVarsSchema) => {
       const color = colord(value);
       const { h, s, l } = color.toHsl();
 
-      cssVars[`--${toKebabCase(key)}`] = `${h} ${s} ${l}`;
+      // Tailwind's theme.css consumes these via `hsl(var(--token))`. CSS
+      // Color 4 space-separated `hsl()` requires `%` on saturation and
+      // lightness — without it, the function is invalid and the property
+      // falls back to its initial value (which is why bare numeric output
+      // here used to silently break customer colours).
+      cssVars[`--${toKebabCase(key)}`] = `${h} ${s}% ${l}%`;
     }
   }
 
-  if (radius) {
-    cssVars[`--radius`] = `${radius}`;
+  // Defence in depth: radius is interpolated raw into the rendered <style>
+  // block, so anything outside the length pattern is a CSS-injection vector.
+  // The Zod schema rejects bad values at the API boundary; this re-check
+  // protects against schema drift and any path that bypasses validation.
+  if (radius && CSS_LENGTH_REGEX.test(radius)) {
+    cssVars[`--radius`] = radius;
   }
 
   return cssVars;
 };
 
+/**
+ * Pure-string sibling of `toNativeCssVars` — returns the same set of CSS custom
+ * property declarations as a single string suitable for SSR inlining inside a
+ * rule block. Does not touch the DOM.
+ *
+ * Example: { background: '#111', radius: '0.5rem' }
+ *  -> "--background: 0 0% 6.7%; --radius: 0.5rem;"
+ *
+ * Saturation and lightness include the `%` suffix that
+ * `hsl(var(--token))` requires under CSS Color 4 space-separated syntax.
+ */
+export const toNativeCssVarsString = (vars: TCssVarsSchema): string => {
+  const map = toNativeCssVars(vars);
+  return Object.entries(map)
+    .map(([k, v]) => `${k}: ${v};`)
+    .join(' ');
+};
+
 export const injectCss = (options: { css?: string; cssVars?: TCssVarsSchema }) => {
   const { css, cssVars } = options;
 
   if (css) {
     const style = document.createElement('style');
-    style.innerHTML = css;
+    style.textContent = css;
 
     document.head.appendChild(style);
   }
diff --git a/apps/remix/app/utils/nonce.ts b/apps/remix/app/utils/nonce.ts
index dce5c04fb..51ed31e23 100644
--- a/apps/remix/app/utils/nonce.ts
+++ b/apps/remix/app/utils/nonce.ts
@@ -1,3 +1,5 @@
+import { useRouteLoaderData } from 'react-router';
+
 /**
  * Returns the supplied CSP nonce only when rendering on the server.
  *
@@ -19,3 +21,18 @@
  * scripts inherit trust via `'strict-dynamic'`.
  */
 export const nonce = (value: string | undefined): string | undefined => (typeof window === 'undefined' ? value : '');
+
+/**
+ * Reads the per-request CSP nonce surfaced by the root loader. Use this
+ * inside any non-root route component that needs to render a `<style>`,
+ * `<script>`, or other element that the CSP gates by nonce.
+ *
+ * Centralised here so the cast is in one place — if the root loader's
+ * `nonce` field is ever renamed/removed, only this function needs updating
+ * (and TypeScript will catch it at the cast site).
+ */
+export const useCspNonce = (): string | undefined => {
+  const rootData = useRouteLoaderData('root') as { nonce?: string } | undefined;
+
+  return rootData?.nonce;
+};
diff --git a/package-lock.json b/package-lock.json
index 07aabc067..319562864 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -349,20 +349,6 @@
       "dev": true,
       "license": "MIT"
     },
-    "apps/docs/node_modules/typescript": {
-      "version": "5.9.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
-      "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
-      "dev": true,
-      "license": "Apache-2.0",
-      "bin": {
-        "tsc": "bin/tsc",
-        "tsserver": "bin/tsserver"
-      },
-      "engines": {
-        "node": ">=14.17"
-      }
-    },
     "apps/docs/node_modules/undici-types": {
       "version": "7.19.2",
       "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.19.2.tgz",
@@ -30684,6 +30670,8 @@
         "pino": "^9.14.0",
         "pino-pretty": "^13.1.2",
         "playwright": "1.56.1",
+        "postcss": "^8.5.6",
+        "postcss-selector-parser": "^7.1.0",
         "posthog-js": "^1.297.2",
         "posthog-node": "4.18.0",
         "react": "^18",
@@ -30701,6 +30689,19 @@
         "vitest": "^4.0.18"
       }
     },
+    "packages/lib/node_modules/postcss-selector-parser": {
+      "version": "7.1.1",
+      "resolved": "https://registry.npmjs.org/postcss-selector-parser/-/postcss-selector-parser-7.1.1.tgz",
+      "integrity": "sha512-orRsuYpJVw8LdAwqqLykBj9ecS5/cRHlI5+nvTo8LcCKmzDmqVORXtOIYEEQuL9D4BxtA1lm5isAqzQZCoQ6Eg==",
+      "license": "MIT",
+      "dependencies": {
+        "cssesc": "^3.0.0",
+        "util-deprecate": "^1.0.2"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
     "packages/prettier-config": {
       "name": "@documenso/prettier-config",
       "version": "0.0.0",
diff --git a/packages/app-tests/e2e/envelope-editor-v2/envelope-editor-embedded.spec.ts b/packages/app-tests/e2e/envelope-editor-v2/envelope-editor-embedded.spec.ts
index a67a9842e..37b1a1e38 100644
--- a/packages/app-tests/e2e/envelope-editor-v2/envelope-editor-embedded.spec.ts
+++ b/packages/app-tests/e2e/envelope-editor-v2/envelope-editor-embedded.spec.ts
@@ -32,10 +32,14 @@ const TEST_RAW_CSS = '.e2e-css-test-marker { color: red; }';
  * Expected HSL values after conversion by `toNativeCssVars`:
  * - colord('#ff0000').toHsl() → { h: 0, s: 100, l: 50 }
  * - colord('#00ff00').toHsl() → { h: 120, s: 100, l: 50 }
+ *
+ * The `%` on saturation and lightness is required: theme.css consumes these
+ * via `hsl(var(--token))`, and CSS Color 4 space-separated `hsl()` rejects
+ * bare numbers there. See `apps/remix/app/utils/css-vars.ts`.
  */
 const EXPECTED_CSS_VARS = {
-  '--background': '0 100 50',
-  '--primary': '120 100 50',
+  '--background': '0 100% 50%',
+  '--primary': '120 100% 50%',
   '--radius': '1rem',
 };
 
@@ -64,7 +68,7 @@ const enableEmbedAuthoringWhiteLabel = async (userId: number) => {
 const DEFAULT_BODY_BG_COLOR = 'rgb(255, 255, 255)';
 
 /**
- * When `--background` is set to `0 100 50` (hsl(0, 100%, 50%)) the body background
+ * When `--background` is set to `0 100% 50%` (hsl(0, 100%, 50%)) the body background
  * resolves to pure red via the Tailwind `bg-background` → `hsl(var(--background))` chain.
  */
 const INJECTED_BODY_BG_COLOR = 'rgb(255, 0, 0)';
diff --git a/packages/auth/server/lib/utils/handle-oauth-callback-url.ts b/packages/auth/server/lib/utils/handle-oauth-callback-url.ts
index a8a9abe44..7f4ab0b70 100644
--- a/packages/auth/server/lib/utils/handle-oauth-callback-url.ts
+++ b/packages/auth/server/lib/utils/handle-oauth-callback-url.ts
@@ -1,8 +1,5 @@
 import { NEXT_PUBLIC_WEBAPP_URL } from '@documenso/lib/constants/app';
-import {
-  isEmailDomainAllowedForSignup,
-  isSignupEnabledForProvider,
-} from '@documenso/lib/constants/auth';
+import { isEmailDomainAllowedForSignup, isSignupEnabledForProvider } from '@documenso/lib/constants/auth';
 import { AppError, AppErrorCode } from '@documenso/lib/errors/app-error';
 import { onCreateUserHook } from '@documenso/lib/server-only/user/create-user';
 import { deletedServiceAccountEmail } from '@documenso/lib/server-only/user/service-accounts/deleted-account';
diff --git a/packages/lib/constants/auth.ts b/packages/lib/constants/auth.ts
index 850c74e73..91560505e 100644
--- a/packages/lib/constants/auth.ts
+++ b/packages/lib/constants/auth.ts
@@ -124,9 +124,7 @@ export const isEmailDomainAllowedForSignup = (email: string): boolean => {
  * Check if signup is enabled for the given provider.
  * The master switch takes precedence over the per-provider flags.
  */
-export const isSignupEnabledForProvider = (
-  provider: 'email' | 'google' | 'microsoft' | 'oidc',
-): boolean => {
+export const isSignupEnabledForProvider = (provider: 'email' | 'google' | 'microsoft' | 'oidc'): boolean => {
   if (env('NEXT_PUBLIC_DISABLE_SIGNUP') === 'true') {
     return false;
   }
diff --git a/packages/lib/constants/branding.ts b/packages/lib/constants/branding.ts
new file mode 100644
index 000000000..f50cc7098
--- /dev/null
+++ b/packages/lib/constants/branding.ts
@@ -0,0 +1,11 @@
+/**
+ * Maximum length (in characters) of the user-supplied custom CSS for branding.
+ * Bound enforced at the TRPC request boundary on both the organisation and
+ * team settings update routes. The sanitiser is run after this check; this
+ * limit is purely a request-size guard.
+ *
+ * 256 KB — generous enough for hand-written branding CSS and the occasional
+ * compiled-from-Tailwind-or-similar paste, while still keeping a request
+ * cap so a malicious or runaway payload can't exhaust PostCSS/server memory.
+ */
+export const BRANDING_CSS_MAX_LENGTH = 256 * 1024;
diff --git a/packages/lib/constants/theme.ts b/packages/lib/constants/theme.ts
new file mode 100644
index 000000000..ac813418b
--- /dev/null
+++ b/packages/lib/constants/theme.ts
@@ -0,0 +1,58 @@
+import type { TCssVarsSchema } from '../types/css-vars';
+
+/**
+ * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+ *
+ * KEEP THIS FILE IN SYNC WITH `packages/ui/styles/theme.css`.
+ *
+ * These are the light-mode default values for the CSS custom properties
+ * defined under `:root` in the theme stylesheet, exposed here as hex strings
+ * so they can be used as defaults for colour-picker UI components and other
+ * places that don't render through CSS variables.
+ *
+ * If you change a value in `theme.css`, update it here too. There is NO
+ * automated check linking the two files; they have drifted historically
+ * and will drift again unless you update both.
+ *
+ * Computed via `colord({ h, s, l }).toHex()` — see the inline HSL comments
+ * for the source-of-truth values from `theme.css`.
+ *
+ * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+ */
+export const DEFAULT_BRAND_COLORS = {
+  background: '#ffffff', //              0 0% 100%
+  foreground: '#0f172a', //              222.2 47.4% 11.2%
+  muted: '#f1f5f9', //                   210 40% 96.1%
+  mutedForeground: '#64748b', //         215.4 16.3% 46.9%
+  popover: '#ffffff', //                 0 0% 100%
+  popoverForeground: '#0f172a', //       222.2 47.4% 11.2%
+  card: '#ffffff', //                    0 0% 100%
+  cardBorder: '#e2e8f0', //              214.3 31.8% 91.4%
+  cardForeground: '#0f172a', //          222.2 47.4% 11.2%
+  fieldCard: '#e2f8d3', //               95 74% 90%
+  fieldCardBorder: '#a2e771', //         95.08 71.08% 67.45%
+  fieldCardForeground: '#0f172a', //     222.2 47.4% 11.2%
+  widget: '#f7f7f7', //                  0 0% 97%
+  widgetForeground: '#f2f2f2', //        0 0% 95%
+  border: '#e2e8f0', //                  214.3 31.8% 91.4%
+  input: '#e2e8f0', //                   214.3 31.8% 91.4%
+  primary: '#a2e771', //                 95.08 71.08% 67.45%
+  primaryForeground: '#162c07', //       95.08 71.08% 10%
+  secondary: '#f1f5f9', //               210 40% 96.1%
+  secondaryForeground: '#0f172a', //     222.2 47.4% 11.2%
+  accent: '#f1f5f9', //                  210 40% 96.1%
+  accentForeground: '#0f172a', //        222.2 47.4% 11.2%
+  destructive: '#ff0000', //             0 100% 50%
+  destructiveForeground: '#f8fafc', //   210 40% 98%
+  ring: '#a2e771', //                    95.08 71.08% 67.45%
+  warning: '#e1cb05', //                 54 96% 45%
+  envelopeEditorBackground: '#f8fafc', //210 40% 98.04%
+  // `cardBorderTint` is intentionally excluded from the colour-picker UI:
+  // unlike the rest of these tokens it is consumed via `rgb(var(--token))`
+  // (not `hsl(...)`) and stored as raw RGB triplets in `theme.css`. It does
+  // not flow through `toNativeCssVars` and is not user-customisable from the
+  // branding form. `radius` is a length, not a colour, so it lives in
+  // `DEFAULT_BRAND_RADIUS` below.
+} as const satisfies Record<keyof Omit<TCssVarsSchema, 'radius' | 'cardBorderTint'>, string>;
+
+export const DEFAULT_BRAND_RADIUS = '0.5rem';
diff --git a/packages/lib/package.json b/packages/lib/package.json
index 623aba144..ca52ef908 100644
--- a/packages/lib/package.json
+++ b/packages/lib/package.json
@@ -57,6 +57,8 @@
     "pino": "^9.14.0",
     "pino-pretty": "^13.1.2",
     "playwright": "1.56.1",
+    "postcss": "^8.5.6",
+    "postcss-selector-parser": "^7.1.0",
     "posthog-js": "^1.297.2",
     "posthog-node": "4.18.0",
     "react": "^18",
diff --git a/packages/lib/server-only/branding/load-recipient-branding.ts b/packages/lib/server-only/branding/load-recipient-branding.ts
new file mode 100644
index 000000000..b9a58b68c
--- /dev/null
+++ b/packages/lib/server-only/branding/load-recipient-branding.ts
@@ -0,0 +1,55 @@
+import { IS_BILLING_ENABLED } from '../../constants/app';
+import type { TCssVarsSchema } from '../../types/css-vars';
+import { ZCssVarsSchema } from '../../types/css-vars';
+import { getOrganisationClaimByTeamId } from '../organisation/get-organisation-claims';
+import { getTeamSettings } from '../team/get-team-settings';
+
+export type RecipientBrandingPayload = {
+  allowCustomBranding: boolean;
+  hidePoweredBy: boolean;
+  colors: TCssVarsSchema | null;
+  css: string | null;
+};
+
+/**
+ * Resolve the branding payload for a recipient-facing route, given the team
+ * the envelope/document belongs to. Reads inherited team-or-org branding settings,
+ * checks the org's claim flags, and returns a payload safe to send to the client.
+ *
+ * Returns a minimal disabled payload if the team is not on a plan that allows
+ * custom branding.
+ */
+export const loadRecipientBrandingByTeamId = async ({
+  teamId,
+}: {
+  teamId: number;
+}): Promise<RecipientBrandingPayload> => {
+  const billingEnabled = IS_BILLING_ENABLED();
+
+  const [settings, claim] = await Promise.all([
+    getTeamSettings({ teamId }),
+    billingEnabled ? getOrganisationClaimByTeamId({ teamId }).catch(() => null) : Promise.resolve(null),
+  ]);
+
+  const allowCustomBranding = !billingEnabled || claim?.flags?.embedSigningWhiteLabel === true;
+  const hidePoweredBy = !billingEnabled || claim?.flags?.hidePoweredBy === true;
+
+  if (!allowCustomBranding) {
+    return {
+      allowCustomBranding: false,
+      hidePoweredBy,
+      colors: null,
+      css: null,
+    };
+  }
+
+  // brandingColors is stored as JSON; parse defensively. Drop unknown keys via Zod.
+  const parsedColors = settings.brandingColors ? ZCssVarsSchema.safeParse(settings.brandingColors) : null;
+
+  return {
+    allowCustomBranding: true,
+    hidePoweredBy,
+    colors: parsedColors?.success ? parsedColors.data : null,
+    css: settings.brandingCss && settings.brandingCss.length > 0 ? settings.brandingCss : null,
+  };
+};
diff --git a/packages/lib/server-only/team/get-team-settings.ts b/packages/lib/server-only/team/get-team-settings.ts
index 0bdac9e69..e8cd53678 100644
--- a/packages/lib/server-only/team/get-team-settings.ts
+++ b/packages/lib/server-only/team/get-team-settings.ts
@@ -39,6 +39,8 @@ export const getTeamSettings = async ({ userId, teamId }: GetTeamSettingsOptions
     teamSettings.brandingLogo = organisationSettings.brandingLogo;
     teamSettings.brandingUrl = organisationSettings.brandingUrl;
     teamSettings.brandingCompanyDetails = organisationSettings.brandingCompanyDetails;
+    teamSettings.brandingColors = organisationSettings.brandingColors;
+    teamSettings.brandingCss = organisationSettings.brandingCss;
   }
 
   return extractDerivedTeamSettings(organisationSettings, teamSettings);
diff --git a/packages/lib/types/css-vars.ts b/packages/lib/types/css-vars.ts
index 6c8c85d76..64f5ae33a 100644
--- a/packages/lib/types/css-vars.ts
+++ b/packages/lib/types/css-vars.ts
@@ -1,5 +1,13 @@
 import { z } from 'zod';
 
+/**
+ * A CSS length value: `0`, or a positive number followed by a length unit.
+ * Used for the radius field, which is interpolated raw into a `<style>`
+ * block at render time. Anything outside this shape is a CSS-injection
+ * vector — DO NOT loosen without re-checking `toNativeCssVars`.
+ */
+export const CSS_LENGTH_REGEX = /^(0|\d+(\.\d+)?(rem|px|em|%|pt|))$/i;
+
 export const ZCssVarsSchema = z
   .object({
     background: z.string().optional().describe('Base background color'),
@@ -28,7 +36,11 @@ export const ZCssVarsSchema = z
     destructive: z.string().optional().describe('Destructive/danger action color'),
     destructiveForeground: z.string().optional().describe('Destructive/danger text color'),
     ring: z.string().optional().describe('Focus ring color'),
-    radius: z.string().optional().describe('Border radius size in REM units'),
+    radius: z
+      .string()
+      .regex(CSS_LENGTH_REGEX, 'Must be a CSS length such as 0.5rem, 8px, or 0')
+      .optional()
+      .describe('Border radius — must be a CSS length (rem/px/em/%/pt or 0)'),
     warning: z.string().optional().describe('Warning/alert color'),
     envelopeEditorBackground: z.string().optional().describe('Envelope editor background color'),
   })
diff --git a/packages/lib/utils/normalize-branding-colors.ts b/packages/lib/utils/normalize-branding-colors.ts
new file mode 100644
index 000000000..9e9c5af24
--- /dev/null
+++ b/packages/lib/utils/normalize-branding-colors.ts
@@ -0,0 +1,46 @@
+import type { TCssVarsSchema } from '../types/css-vars';
+
+/**
+ * Normalise a branding-colours payload coming from a settings form.
+ *
+ * The colour-pickers store empty strings for cleared fields, and
+ * `ZCssVarsSchema.default({})` produces `{}` when the form is submitted
+ * without any colour overrides. Persisting either as a non-null value would
+ * silently mask the org's defaults for a team, and produce noisy "this is
+ * an override of nothing" rows in the database.
+ *
+ * This helper:
+ *  - strips keys whose value is `undefined`, `null`, or an empty string
+ *  - returns `null` if the result has no remaining keys
+ *  - leaves all other keys verbatim (validation against ZCssVarsSchema is
+ *    expected to have happened at the request boundary)
+ *
+ * `undefined` input means "no change" — the caller should not pass it
+ * through to Prisma. We pass it through unchanged so handlers can keep their
+ * existing `=== undefined` branches.
+ */
+export const normalizeBrandingColors = (
+  input: TCssVarsSchema | null | undefined,
+): TCssVarsSchema | null | undefined => {
+  if (input === undefined) {
+    return undefined;
+  }
+
+  if (input === null) {
+    return null;
+  }
+
+  const cleaned: Record<string, string> = {};
+
+  for (const [key, value] of Object.entries(input)) {
+    if (typeof value === 'string' && value.trim() !== '') {
+      cleaned[key] = value;
+    }
+  }
+
+  if (Object.keys(cleaned).length === 0) {
+    return null;
+  }
+
+  return cleaned as TCssVarsSchema;
+};
diff --git a/packages/lib/utils/organisations.ts b/packages/lib/utils/organisations.ts
index cc5cb796a..b643ba6aa 100644
--- a/packages/lib/utils/organisations.ts
+++ b/packages/lib/utils/organisations.ts
@@ -124,6 +124,8 @@ export const generateDefaultOrganisationSettings = (): Omit<OrganisationGlobalSe
     brandingLogo: '',
     brandingUrl: '',
     brandingCompanyDetails: '',
+    brandingColors: null,
+    brandingCss: '',
 
     emailId: null,
     emailReplyTo: null,
diff --git a/packages/lib/utils/sanitize-branding-css.test.ts b/packages/lib/utils/sanitize-branding-css.test.ts
new file mode 100644
index 000000000..9b7cb771a
--- /dev/null
+++ b/packages/lib/utils/sanitize-branding-css.test.ts
@@ -0,0 +1,436 @@
+import { describe, expect, it } from 'vitest';
+
+import { sanitizeBrandingCss } from './sanitize-branding-css';
+
+const normalize = (css: string) => css.replace(/\s+/g, ' ').trim();
+
+/**
+ * The sanitiser does NOT scope selectors. Scoping is applied at render time
+ * by wrapping the entire sanitised output in `.documenso-branded { ... }` via
+ * native CSS nesting (see `RecipientBranding`). These tests assert that
+ * selectors are preserved verbatim and only validated.
+ */
+describe('sanitizeBrandingCss', () => {
+  describe('empty input', () => {
+    it('returns empty output for an empty string', () => {
+      const result = sanitizeBrandingCss('');
+
+      expect(result.css).toBe('');
+      expect(result.warnings).toEqual([]);
+    });
+
+    it('returns empty output for whitespace-only input', () => {
+      const result = sanitizeBrandingCss('   \n\t  \n');
+
+      expect(result.css).toBe('');
+      expect(result.warnings).toEqual([]);
+    });
+  });
+
+  describe('selector preservation', () => {
+    it('preserves a bare class selector', () => {
+      const result = sanitizeBrandingCss('.foo { color: red; }');
+
+      expect(normalize(result.css)).toBe('.foo { color: red; }');
+      expect(result.warnings).toEqual([]);
+    });
+
+    it('preserves a tag selector', () => {
+      const result = sanitizeBrandingCss('h1 { color: red; }');
+
+      expect(normalize(result.css)).toBe('h1 { color: red; }');
+      expect(result.warnings).toEqual([]);
+    });
+
+    it('preserves combinators', () => {
+      const result = sanitizeBrandingCss('.a > .b + .c ~ .d { color: red; }');
+
+      expect(normalize(result.css)).toBe('.a > .b + .c ~ .d { color: red; }');
+      expect(result.warnings).toEqual([]);
+    });
+
+    it('preserves comma-separated selectors', () => {
+      const result = sanitizeBrandingCss('.a, .b { color: red; }');
+
+      expect(normalize(result.css)).toBe('.a, .b { color: red; }');
+      expect(result.warnings).toEqual([]);
+    });
+
+    it('preserves body/html/:root verbatim (will no-op once nested at render)', () => {
+      const result = sanitizeBrandingCss('body { background: black; }');
+
+      // Selector is left as-is. At render time this becomes
+      // `.documenso-branded body { ... }`, which won't match anything since
+      // <body> is an ancestor of the wrapper. Documented tradeoff.
+      expect(normalize(result.css)).toBe('body { background: black; }');
+      expect(result.warnings).toEqual([]);
+    });
+  });
+
+  describe('pseudo-elements', () => {
+    it('drops a rule containing ::before', () => {
+      const result = sanitizeBrandingCss(".foo::before { content: 'x'; }");
+
+      expect(result.css.trim()).toBe('');
+      expect(result.warnings).toHaveLength(1);
+      expect(result.warnings[0].kind).toBe('selector');
+    });
+
+    it('drops a rule containing ::after', () => {
+      const result = sanitizeBrandingCss(".foo::after { content: 'x'; }");
+
+      expect(result.css.trim()).toBe('');
+      expect(result.warnings).toHaveLength(1);
+    });
+
+    it('drops a rule containing ::backdrop', () => {
+      const result = sanitizeBrandingCss('.foo::backdrop { color: red; }');
+
+      expect(result.css.trim()).toBe('');
+      expect(result.warnings).toHaveLength(1);
+    });
+
+    it('drops a rule containing ::marker', () => {
+      const result = sanitizeBrandingCss('li::marker { color: red; }');
+
+      expect(result.css.trim()).toBe('');
+      expect(result.warnings).toHaveLength(1);
+    });
+
+    it('drops a rule using legacy single-colon :before', () => {
+      const result = sanitizeBrandingCss(".foo:before { content: 'x'; }");
+
+      expect(result.css.trim()).toBe('');
+      expect(result.warnings).toHaveLength(1);
+      expect(result.warnings[0].kind).toBe('selector');
+    });
+
+    it('drops a rule using legacy single-colon :after', () => {
+      const result = sanitizeBrandingCss(".foo:after { content: 'x'; }");
+
+      expect(result.css.trim()).toBe('');
+      expect(result.warnings).toHaveLength(1);
+    });
+
+    it('keeps ::placeholder verbatim', () => {
+      const result = sanitizeBrandingCss('input::placeholder { color: gray; }');
+
+      expect(normalize(result.css)).toBe('input::placeholder { color: gray; }');
+      expect(result.warnings).toEqual([]);
+    });
+
+    it('keeps ::selection verbatim', () => {
+      const result = sanitizeBrandingCss('p::selection { background: yellow; }');
+
+      expect(normalize(result.css)).toBe('p::selection { background: yellow; }');
+      expect(result.warnings).toEqual([]);
+    });
+  });
+
+  describe('universal selector', () => {
+    it('drops a bare * selector rule', () => {
+      const result = sanitizeBrandingCss('* { color: red; }');
+
+      expect(result.css.trim()).toBe('');
+      expect(result.warnings).toHaveLength(1);
+      expect(result.warnings[0].kind).toBe('selector');
+    });
+
+    it('drops a rule with * combined with descendant', () => {
+      const result = sanitizeBrandingCss('* .x { color: red; }');
+
+      expect(result.css.trim()).toBe('');
+      expect(result.warnings).toHaveLength(1);
+    });
+
+    it('keeps attribute selectors that include * inside', () => {
+      const result = sanitizeBrandingCss('[class*="foo"] { color: red; }');
+
+      expect(normalize(result.css)).toBe('[class*="foo"] { color: red; }');
+      expect(result.warnings).toEqual([]);
+    });
+  });
+
+  describe('blocked properties', () => {
+    const blockedProperties = [
+      'display',
+      'visibility',
+      'opacity',
+      'pointer-events',
+      'position',
+      'inset',
+      'top',
+      'right',
+      'bottom',
+      'left',
+      'z-index',
+      'transform',
+      'clip',
+      'clip-path',
+      'mask',
+      'mask-image',
+      'content',
+      'width',
+      'height',
+      'min-width',
+      'min-height',
+      'max-width',
+      'max-height',
+      'overflow',
+      'overflow-x',
+      'overflow-y',
+      'font-size',
+      'letter-spacing',
+      'word-spacing',
+      'line-height',
+      'text-indent',
+    ];
+
+    for (const prop of blockedProperties) {
+      it(`strips the "${prop}" property`, () => {
+        const result = sanitizeBrandingCss(`.x { ${prop}: 10px; color: red; }`);
+
+        expect(result.css).not.toContain(`${prop}:`);
+        expect(result.css).toContain('color: red');
+        expect(result.warnings).toHaveLength(1);
+        expect(result.warnings[0].kind).toBe('property');
+        expect(result.warnings[0].detail).toContain(prop);
+      });
+    }
+
+    it('is case-insensitive on property names', () => {
+      const result = sanitizeBrandingCss('.x { DISPLAY: none; color: red; }');
+
+      expect(result.css).not.toMatch(/display/i);
+      expect(result.warnings).toHaveLength(1);
+      expect(result.warnings[0].kind).toBe('property');
+    });
+
+    const allowedProperties: Array<[string, string]> = [
+      ['color', 'red'],
+      ['background', '#fff'],
+      ['border', '1px solid black'],
+      ['border-radius', '4px'],
+      ['font-family', 'sans-serif'],
+      ['font-weight', '600'],
+    ];
+
+    for (const [prop, value] of allowedProperties) {
+      it(`keeps the "${prop}" property`, () => {
+        const result = sanitizeBrandingCss(`.x { ${prop}: ${value}; }`);
+
+        expect(result.css).toContain(`${prop}: ${value}`);
+        expect(result.warnings).toEqual([]);
+      });
+    }
+  });
+
+  describe('blocked values', () => {
+    it('drops a declaration containing url(', () => {
+      const result = sanitizeBrandingCss('.x { background: url(http://evil); }');
+
+      expect(result.css).not.toContain('url(');
+      expect(result.warnings).toHaveLength(1);
+      expect(result.warnings[0].kind).toBe('value');
+    });
+
+    it('drops a declaration containing expression(', () => {
+      const result = sanitizeBrandingCss('.x { background: expression(alert(1)); }');
+
+      expect(result.css).not.toContain('expression(');
+      expect(result.warnings).toHaveLength(1);
+      expect(result.warnings[0].kind).toBe('value');
+    });
+
+    it('drops a declaration containing javascript: in a quoted value', () => {
+      // PostCSS would throw on bare `javascript:alert(1)` (looks like a
+      // malformed selector inside a declaration). Use a quoted value to
+      // exercise the substring match cleanly.
+      const result = sanitizeBrandingCss('.x { font-family: "javascript:alert"; }');
+
+      expect(result.css).not.toContain('javascript:');
+      expect(result.warnings).toHaveLength(1);
+      expect(result.warnings[0].kind).toBe('value');
+    });
+  });
+
+  describe('!important stripping', () => {
+    it('strips !important from a retained declaration', () => {
+      const result = sanitizeBrandingCss('.x { color: red !important; }');
+
+      expect(result.css).not.toContain('!important');
+      expect(result.css).toContain('color: red');
+      expect(result.warnings).toEqual([]);
+    });
+  });
+
+  describe('at-rules', () => {
+    it('drops @import', () => {
+      const result = sanitizeBrandingCss('@import url("https://evil.example/x.css");');
+
+      expect(result.css.trim()).toBe('');
+      expect(result.warnings).toHaveLength(1);
+      expect(result.warnings[0].kind).toBe('at-rule');
+    });
+
+    it('drops @font-face', () => {
+      const result = sanitizeBrandingCss('@font-face { font-family: "X"; src: url("x.woff2"); }');
+
+      expect(result.css.trim()).toBe('');
+      expect(result.warnings).toHaveLength(1);
+      expect(result.warnings[0].kind).toBe('at-rule');
+    });
+
+    it('drops @keyframes', () => {
+      const result = sanitizeBrandingCss('@keyframes spin { to { transform: rotate(360deg); } }');
+
+      expect(result.css.trim()).toBe('');
+      expect(result.warnings).toHaveLength(1);
+      expect(result.warnings[0].kind).toBe('at-rule');
+    });
+
+    it('drops @supports', () => {
+      const result = sanitizeBrandingCss('@supports (display: grid) { .x { color: red; } }');
+
+      expect(result.css.trim()).toBe('');
+      expect(result.warnings).toHaveLength(1);
+      expect(result.warnings[0].kind).toBe('at-rule');
+    });
+
+    it('keeps @media with min-width and preserves inner selectors verbatim', () => {
+      const result = sanitizeBrandingCss('@media (min-width: 600px) { .x { color: red; } }');
+
+      expect(normalize(result.css)).toBe('@media (min-width: 600px) { .x { color: red; } }');
+      expect(result.warnings).toEqual([]);
+    });
+
+    it('keeps @media with prefers-color-scheme and preserves body inside', () => {
+      const result = sanitizeBrandingCss('@media (prefers-color-scheme: dark) { body { background: black; } }');
+
+      expect(normalize(result.css)).toBe('@media (prefers-color-scheme: dark) { body { background: black; } }');
+      expect(result.warnings).toEqual([]);
+    });
+
+    it('strips blocked properties inside @media', () => {
+      const result = sanitizeBrandingCss('@media (min-width: 600px) { .x { display: none; color: red; } }');
+
+      expect(result.css).not.toContain('display');
+      expect(result.css).toContain('color: red');
+      expect(result.warnings).toHaveLength(1);
+      expect(result.warnings[0].kind).toBe('property');
+    });
+  });
+
+  describe('combined input', () => {
+    it('keeps valid rules verbatim and reports each drop', () => {
+      const input = `
+        .ok { color: red !important; }
+        .bad-prop { display: none; background: blue; }
+        .bad-pseudo::before { content: 'x'; }
+        * { color: red; }
+        @import "evil.css";
+        body { background: black; }
+        @media (min-width: 600px) {
+          .responsive { color: green; }
+        }
+      `;
+
+      const result = sanitizeBrandingCss(input);
+
+      // Valid bits present, unchanged.
+      expect(result.css).toContain('.ok');
+      expect(result.css).toContain('color: red');
+      expect(result.css).toContain('.bad-prop');
+      expect(result.css).toContain('background: blue');
+      expect(result.css).toContain('body { background: black');
+      expect(result.css).toContain('@media (min-width: 600px)');
+      expect(result.css).toContain('.responsive');
+
+      // Invalid bits gone.
+      expect(result.css).not.toContain('!important');
+      expect(result.css).not.toContain('display');
+      expect(result.css).not.toContain('::before');
+      expect(result.css).not.toContain('@import');
+
+      // Warning kinds.
+      const kinds = result.warnings.map((w) => w.kind).sort();
+      expect(kinds).toEqual(['at-rule', 'property', 'selector', 'selector'].sort());
+    });
+  });
+
+  describe('style-close-tag defence', () => {
+    // The sanitised output is inlined into a `<style>` element via SSR. The
+    // browser's HTML parser terminates the element on a literal `</style`
+    // anywhere in the content. PostCSS's serializer normally escapes `<` to
+    // `\3c` whenever it would form `</...`, so the literal sequence should
+    // never reach the output for any of these inputs. These tests pin that
+    // invariant.
+
+    it('escapes </style> inside a string value', () => {
+      const result = sanitizeBrandingCss('.x { font-family: "</style><img src=x onerror=alert(1)>"; }');
+
+      expect(result.css.toLowerCase()).not.toContain('</style');
+      // Whatever else happens, the canonical close-tag bytes must not appear.
+    });
+
+    it('escapes </style> inside a CSS comment', () => {
+      const result = sanitizeBrandingCss('.x { color: red; /* </style><script>alert(1)</script> */ }');
+
+      expect(result.css.toLowerCase()).not.toContain('</style');
+    });
+
+    it('escapes </style> inside an at-rule params block', () => {
+      const result = sanitizeBrandingCss(
+        '@media screen and (foo: bar)</style><script>x()</script> { .x { color: red; } }',
+      );
+
+      expect(result.css.toLowerCase()).not.toContain('</style');
+    });
+
+    it('escapes mixed-case </StYlE> in a value', () => {
+      const result = sanitizeBrandingCss('.x { font-family: "</StYlE>foo"; }');
+
+      expect(result.css.toLowerCase()).not.toContain('</style');
+    });
+
+    it('escapes </style> in an attribute selector value', () => {
+      const result = sanitizeBrandingCss('[data-x="</style><script>alert(1)</script>"] { color: red; }');
+
+      expect(result.css.toLowerCase()).not.toContain('</style');
+    });
+
+    it('preserves benign < not followed by /', () => {
+      // `<script>` (no slash) is not a tag close; PostCSS leaves it as text
+      // and the HTML parser treats it as text inside <style> rawtext mode.
+      const result = sanitizeBrandingCss('.x { font-family: "<script>alert(1)</script>"; }');
+
+      // The output keeps the literal `<script>` (harmless) but escapes the
+      // `</script>` end tag's `<` for the same reason it'd escape `</style>`.
+      expect(result.css).toContain('<script>');
+      expect(result.css.toLowerCase()).not.toContain('</style');
+    });
+  });
+
+  describe('malformed CSS', () => {
+    // PostCSS is forgiving; an empty value parses without throwing.
+    it('handles a declaration with an empty value gracefully', () => {
+      const result = sanitizeBrandingCss('.x { color: }');
+
+      expect(result.warnings.filter((w) => w.kind === 'parse-error')).toEqual([]);
+      expect(result.css).toContain('.x');
+    });
+
+    it('reports a parse-error for clearly broken CSS', () => {
+      // Unclosed brace.
+      const result = sanitizeBrandingCss('.x { color: red');
+
+      // PostCSS may or may not throw on this; if it does, we get a
+      // parse-error warning. If it tolerates it, the rule is sanitized.
+      if (result.css === '') {
+        expect(result.warnings.some((w) => w.kind === 'parse-error')).toBe(true);
+      } else {
+        expect(result.css).toContain('.x');
+      }
+    });
+  });
+});
diff --git a/packages/lib/utils/sanitize-branding-css.ts b/packages/lib/utils/sanitize-branding-css.ts
new file mode 100644
index 000000000..620dfd624
--- /dev/null
+++ b/packages/lib/utils/sanitize-branding-css.ts
@@ -0,0 +1,323 @@
+import type { AtRule, Container, Declaration, Rule } from 'postcss';
+import postcss from 'postcss';
+import selectorParser from 'postcss-selector-parser';
+import { z } from 'zod';
+
+export const ZSanitizeBrandingCssWarningSchema = z.object({
+  kind: z.enum(['selector', 'property', 'value', 'at-rule', 'parse-error']),
+  detail: z.string(),
+  line: z.number().optional(),
+});
+
+export type SanitizeBrandingCssWarning = z.infer<typeof ZSanitizeBrandingCssWarningSchema>;
+
+export type SanitizeBrandingCssResult = {
+  css: string;
+  warnings: SanitizeBrandingCssWarning[];
+};
+
+/**
+ * The class name the sanitised CSS will be wrapped in at render time using
+ * CSS nesting (`.documenso-branded { <user css> }`). The sanitiser itself
+ * does NOT prefix selectors — the wrapper is applied by `RecipientBranding`
+ * on every render so we keep the user's original CSS intact in the database.
+ */
+export const SANITIZE_BRANDING_SCOPE_CLASS = 'documenso-branded';
+
+const BLOCKED_PROPERTIES = new Set([
+  'display',
+  'visibility',
+  'opacity',
+  'pointer-events',
+  'position',
+  'inset',
+  'top',
+  'right',
+  'bottom',
+  'left',
+  'z-index',
+  'transform',
+  'clip',
+  'clip-path',
+  'mask',
+  'mask-image',
+  'content',
+  'width',
+  'height',
+  'min-width',
+  'min-height',
+  'max-width',
+  'max-height',
+  'overflow',
+  'overflow-x',
+  'overflow-y',
+  'font-size',
+  'letter-spacing',
+  'word-spacing',
+  'line-height',
+  'text-indent',
+]);
+
+const BLOCKED_VALUE_SUBSTRINGS = ['url(', 'expression(', '@import', 'javascript:'];
+
+const BLOCKED_PSEUDO_ELEMENTS = new Set([
+  '::before',
+  '::after',
+  '::backdrop',
+  '::marker',
+  // Single-colon legacy forms.
+  ':before',
+  ':after',
+]);
+
+const BLOCKED_AT_RULES = new Set([
+  'import',
+  'font-face',
+  'keyframes',
+  'charset',
+  'namespace',
+  'supports',
+  'page',
+  'document',
+  'viewport',
+]);
+
+type SelectorValidationResult = { kind: 'ok' } | { kind: 'drop'; reason: string };
+
+/**
+ * Validate a selector for the rules we care about, but DO NOT rewrite it.
+ * The sanitised output is later wrapped in `.documenso-branded { ... }` via
+ * native CSS nesting by `RecipientBranding`, so scoping happens at render.
+ */
+const validateSelector = (rawSelector: string): SelectorValidationResult => {
+  let dropReason: string | null = null;
+
+  const transform = selectorParser((selectors) => {
+    selectors.each((selector) => {
+      selector.walk((node) => {
+        // Pseudo-element check (works at any depth — even nested pseudos like
+        // `:is(::before)` should be rejected).
+        if (node.type === 'pseudo') {
+          const value = node.value;
+
+          if (BLOCKED_PSEUDO_ELEMENTS.has(value)) {
+            dropReason = `pseudo-element "${value}" not allowed`;
+          }
+        }
+      });
+
+      if (dropReason !== null) {
+        return;
+      }
+
+      // Universal selector check — only when it is a direct child of the
+      // top-level compound (i.e. `* { ... }` or `* .foo { ... }`).
+      // Universal nodes nested inside attribute selectors (`[class*="x"]`)
+      // are a different node type and won't appear here.
+      selector.each((node) => {
+        if (node.type === 'universal') {
+          dropReason = 'universal "*" selector not allowed';
+        }
+      });
+    });
+  });
+
+  try {
+    // We don't keep the result — we only care about parsing and walking
+    // to populate dropReason.
+    transform.processSync(rawSelector);
+  } catch (error) {
+    return {
+      kind: 'drop',
+      reason: error instanceof Error ? error.message : 'failed to parse selector',
+    };
+  }
+
+  if (dropReason !== null) {
+    return { kind: 'drop', reason: dropReason };
+  }
+
+  return { kind: 'ok' };
+};
+
+const valueIsBlocked = (rawValue: string): boolean => {
+  const lowered = rawValue.toLowerCase();
+
+  return BLOCKED_VALUE_SUBSTRINGS.some((needle) => lowered.includes(needle));
+};
+
+const sanitizeDeclarations = (container: Container, warnings: SanitizeBrandingCssWarning[]): void => {
+  const toRemove: Declaration[] = [];
+
+  container.each((node) => {
+    if (node.type !== 'decl') {
+      return;
+    }
+
+    const decl = node;
+    const propLower = decl.prop.toLowerCase();
+
+    if (BLOCKED_PROPERTIES.has(propLower)) {
+      warnings.push({
+        kind: 'property',
+        detail: `property "${decl.prop}" is not allowed`,
+        line: decl.source?.start?.line,
+      });
+      toRemove.push(decl);
+
+      return;
+    }
+
+    if (valueIsBlocked(decl.value)) {
+      warnings.push({
+        kind: 'value',
+        detail: `value of "${decl.prop}" contains a disallowed token`,
+        line: decl.source?.start?.line,
+      });
+      toRemove.push(decl);
+
+      return;
+    }
+
+    if (decl.important) {
+      decl.important = false;
+    }
+  });
+
+  for (const decl of toRemove) {
+    decl.remove();
+  }
+};
+
+const sanitizeRule = (rule: Rule, warnings: SanitizeBrandingCssWarning[]): void => {
+  const line = rule.source?.start?.line;
+  const validation = validateSelector(rule.selector);
+
+  if (validation.kind === 'drop') {
+    warnings.push({ kind: 'selector', detail: validation.reason, line });
+    rule.remove();
+
+    return;
+  }
+
+  // Selector is left as-is. Scoping is applied at render time by wrapping
+  // the entire sanitised CSS in `.documenso-branded { ... }` (CSS nesting).
+
+  sanitizeDeclarations(rule, warnings);
+
+  // If the rule has no declarations left, leave the empty rule in place — the
+  // output is still valid CSS and the user can see what happened. (Removing
+  // it would also be acceptable; we keep it to make warnings easier to map.)
+};
+
+const sanitizeAtRule = (atRule: AtRule, warnings: SanitizeBrandingCssWarning[]): void => {
+  const name = atRule.name.toLowerCase();
+  const line = atRule.source?.start?.line;
+
+  if (BLOCKED_AT_RULES.has(name)) {
+    warnings.push({
+      kind: 'at-rule',
+      detail: `at-rule "@${atRule.name}" is not allowed`,
+      line,
+    });
+    atRule.remove();
+
+    return;
+  }
+
+  if (name !== 'media') {
+    warnings.push({
+      kind: 'at-rule',
+      detail: `at-rule "@${atRule.name}" is not allowed`,
+      line,
+    });
+    atRule.remove();
+
+    return;
+  }
+
+  // Recurse into @media children.
+  const children = atRule.nodes ? [...atRule.nodes] : [];
+
+  for (const child of children) {
+    if (child.type === 'rule') {
+      sanitizeRule(child, warnings);
+    } else if (child.type === 'atrule') {
+      sanitizeAtRule(child, warnings);
+    }
+    // Comments and stray declarations inside @media are left alone /
+    // declarations directly under @media are invalid CSS anyway.
+  }
+};
+
+/**
+ * Defence in depth against `<style>` element breakout.
+ *
+ * The sanitised CSS is inlined into a `<style>` element via SSR
+ * `dangerouslySetInnerHTML`. The browser's HTML parser (in RAWTEXT mode for
+ * `<style>` content) terminates the element on a literal `</style` —
+ * regardless of whether it appears inside a CSS string, comment, or at-rule
+ * params. PostCSS's serializer escapes `<` to `\3c` whenever it would form
+ * `</...`, which means a normal round-trip is already safe.
+ *
+ * That escape is implicit in PostCSS, not enforced by our own logic. If a
+ * future PostCSS version, plugin, or alternative serializer regresses, we
+ * still want the output to be safe to inline. This regex is the explicit
+ * tripwire — case-insensitive `</style` anywhere in the final output is a
+ * hard fail.
+ */
+const STYLE_CLOSE_TAG_REGEX = /<\s*\/\s*style/i;
+
+export const sanitizeBrandingCss = (input: string): SanitizeBrandingCssResult => {
+  const warnings: SanitizeBrandingCssWarning[] = [];
+
+  if (input.trim() === '') {
+    return { css: '', warnings };
+  }
+
+  let root;
+
+  try {
+    root = postcss.parse(input);
+  } catch (error) {
+    return {
+      css: '',
+      warnings: [
+        {
+          kind: 'parse-error',
+          detail: error instanceof Error ? error.message : 'failed to parse CSS',
+        },
+      ],
+    };
+  }
+
+  // Iterate over a snapshot of top-level children so removal during the loop
+  // is safe.
+  const topLevelChildren = root.nodes ? [...root.nodes] : [];
+
+  for (const node of topLevelChildren) {
+    if (node.type === 'rule') {
+      sanitizeRule(node, warnings);
+    } else if (node.type === 'atrule') {
+      sanitizeAtRule(node, warnings);
+    }
+    // Top-level decls / comments are left as-is.
+  }
+
+  const output = root.toString();
+
+  if (STYLE_CLOSE_TAG_REGEX.test(output)) {
+    return {
+      css: '',
+      warnings: [
+        ...warnings,
+        {
+          kind: 'parse-error',
+          detail: 'output contained a literal </style sequence and was rejected',
+        },
+      ],
+    };
+  }
+
+  return { css: output, warnings };
+};
diff --git a/packages/lib/utils/teams.ts b/packages/lib/utils/teams.ts
index 5fa37ad4f..ca81062f4 100644
--- a/packages/lib/utils/teams.ts
+++ b/packages/lib/utils/teams.ts
@@ -191,6 +191,8 @@ export const generateDefaultTeamSettings = (): Omit<TeamGlobalSettings, 'id' | '
     brandingLogo: null,
     brandingUrl: null,
     brandingCompanyDetails: null,
+    brandingColors: null,
+    brandingCss: null,
 
     emailDocumentSettings: null,
     emailId: null,
diff --git a/packages/prisma/migrations/20260507043737_add_custom_css_branding/migration.sql b/packages/prisma/migrations/20260507043737_add_custom_css_branding/migration.sql
new file mode 100644
index 000000000..7c6bdc1ab
--- /dev/null
+++ b/packages/prisma/migrations/20260507043737_add_custom_css_branding/migration.sql
@@ -0,0 +1,7 @@
+-- AlterTable
+ALTER TABLE "OrganisationGlobalSettings" ADD COLUMN     "brandingColors" JSONB,
+ADD COLUMN     "brandingCss" TEXT NOT NULL DEFAULT '';
+
+-- AlterTable
+ALTER TABLE "TeamGlobalSettings" ADD COLUMN     "brandingColors" JSONB,
+ADD COLUMN     "brandingCss" TEXT;
diff --git a/packages/prisma/schema.prisma b/packages/prisma/schema.prisma
index 6b546c59a..9af17faeb 100644
--- a/packages/prisma/schema.prisma
+++ b/packages/prisma/schema.prisma
@@ -831,7 +831,7 @@ enum OrganisationMemberInviteStatus {
   DECLINED
 }
 
-/// @zod.import(["import { ZDocumentEmailSettingsSchema } from '@documenso/lib/types/document-email';", "import { ZDefaultRecipientsSchema } from '@documenso/lib/types/default-recipients';", "import { ZEnvelopeExpirationPeriod as ZEnvelopeExpirationPeriodSchema } from '@documenso/lib/constants/envelope-expiration';", "import { ZEnvelopeReminderSettings as ZEnvelopeReminderSettingsSchema } from '@documenso/lib/constants/envelope-reminder';"])
+/// @zod.import(["import { ZDocumentEmailSettingsSchema } from '@documenso/lib/types/document-email';", "import { ZDefaultRecipientsSchema } from '@documenso/lib/types/default-recipients';", "import { ZEnvelopeExpirationPeriod as ZEnvelopeExpirationPeriodSchema } from '@documenso/lib/constants/envelope-expiration';", "import { ZEnvelopeReminderSettings as ZEnvelopeReminderSettingsSchema } from '@documenso/lib/constants/envelope-reminder';", "import { ZCssVarsSchema } from '@documenso/lib/types/css-vars';"])
 model OrganisationGlobalSettings {
   id           String        @id
   organisation Organisation?
@@ -862,6 +862,8 @@ model OrganisationGlobalSettings {
   brandingLogo           String  @default("")
   brandingUrl            String  @default("")
   brandingCompanyDetails String  @default("")
+  brandingColors         Json? /// [TCssVarsSchema] @zod.custom.use(ZCssVarsSchema)
+  brandingCss            String  @default("")
 
   envelopeExpirationPeriod Json? /// [EnvelopeExpirationPeriod] @zod.custom.use(ZEnvelopeExpirationPeriodSchema)
 
@@ -871,7 +873,7 @@ model OrganisationGlobalSettings {
   aiFeaturesEnabled Boolean @default(false)
 }
 
-/// @zod.import(["import { ZDocumentEmailSettingsSchema } from '@documenso/lib/types/document-email';", "import { ZDefaultRecipientsSchema } from '@documenso/lib/types/default-recipients';", "import { ZEnvelopeExpirationPeriod as ZEnvelopeExpirationPeriodSchema } from '@documenso/lib/constants/envelope-expiration';", "import { ZEnvelopeReminderSettings as ZEnvelopeReminderSettingsSchema } from '@documenso/lib/constants/envelope-reminder';"])
+/// @zod.import(["import { ZDocumentEmailSettingsSchema } from '@documenso/lib/types/document-email';", "import { ZDefaultRecipientsSchema } from '@documenso/lib/types/default-recipients';", "import { ZEnvelopeExpirationPeriod as ZEnvelopeExpirationPeriodSchema } from '@documenso/lib/constants/envelope-expiration';", "import { ZEnvelopeReminderSettings as ZEnvelopeReminderSettingsSchema } from '@documenso/lib/constants/envelope-reminder';", "import { ZCssVarsSchema } from '@documenso/lib/types/css-vars';"])
 model TeamGlobalSettings {
   id   String @id
   team Team?
@@ -903,6 +905,8 @@ model TeamGlobalSettings {
   brandingLogo           String?
   brandingUrl            String?
   brandingCompanyDetails String?
+  brandingColors         Json? /// [TCssVarsSchema] @zod.custom.use(ZCssVarsSchema)
+  brandingCss            String?
 
   envelopeExpirationPeriod Json? /// [EnvelopeExpirationPeriod] @zod.custom.use(ZEnvelopeExpirationPeriodSchema)
 
diff --git a/packages/trpc/server/organisation-router/update-organisation-settings.ts b/packages/trpc/server/organisation-router/update-organisation-settings.ts
index 511c8c7ea..625f79114 100644
--- a/packages/trpc/server/organisation-router/update-organisation-settings.ts
+++ b/packages/trpc/server/organisation-router/update-organisation-settings.ts
@@ -1,6 +1,8 @@
 import { ORGANISATION_MEMBER_ROLE_PERMISSIONS_MAP } from '@documenso/lib/constants/organisations';
 import { AppError, AppErrorCode } from '@documenso/lib/errors/app-error';
+import { normalizeBrandingColors } from '@documenso/lib/utils/normalize-branding-colors';
 import { buildOrganisationWhereQuery } from '@documenso/lib/utils/organisations';
+import { type SanitizeBrandingCssWarning, sanitizeBrandingCss } from '@documenso/lib/utils/sanitize-branding-css';
 import { prisma } from '@documenso/prisma';
 import { OrganisationType, Prisma } from '@prisma/client';
 
@@ -45,6 +47,8 @@ export const updateOrganisationSettingsRoute = authenticatedProcedure
       brandingLogo,
       brandingUrl,
       brandingCompanyDetails,
+      brandingColors,
+      brandingCss,
 
       // Email related settings.
       emailId,
@@ -127,6 +131,24 @@ export const updateOrganisationSettingsRoute = authenticatedProcedure
       });
     }
 
+    // Sanitize custom branding CSS at write time so we can store the safe
+    // result and skip per-render sanitisation. Warnings are returned to the
+    // UI so the user can see what was dropped.
+    let cssWarnings: SanitizeBrandingCssWarning[] | undefined;
+    let sanitizedBrandingCss: string | undefined;
+
+    if (brandingCss !== undefined) {
+      const result = sanitizeBrandingCss(brandingCss);
+      sanitizedBrandingCss = result.css;
+      cssWarnings = result.warnings;
+    }
+
+    // Strip empty-string colour values; collapse to `null` when the payload
+    // contains no overrides. Keeps the stored row clean and avoids storing
+    // `{}` as a real "override of nothing" (matters more for teams, but the
+    // org row stays tidy this way too).
+    const normalizedBrandingColors = normalizeBrandingColors(brandingColors);
+
     await prisma.organisation.update({
       where: {
         id: organisationId,
@@ -155,6 +177,8 @@ export const updateOrganisationSettingsRoute = authenticatedProcedure
             brandingLogo,
             brandingUrl,
             brandingCompanyDetails,
+            brandingColors: normalizedBrandingColors === null ? Prisma.DbNull : normalizedBrandingColors,
+            brandingCss: sanitizedBrandingCss,
 
             // Email related settings.
             emailId,
@@ -168,4 +192,8 @@ export const updateOrganisationSettingsRoute = authenticatedProcedure
         },
       },
     });
+
+    return {
+      cssWarnings: cssWarnings && cssWarnings.length > 0 ? cssWarnings : undefined,
+    };
   });
diff --git a/packages/trpc/server/organisation-router/update-organisation-settings.types.ts b/packages/trpc/server/organisation-router/update-organisation-settings.types.ts
index 9be28f5e4..d7b7d1c0d 100644
--- a/packages/trpc/server/organisation-router/update-organisation-settings.types.ts
+++ b/packages/trpc/server/organisation-router/update-organisation-settings.types.ts
@@ -1,10 +1,13 @@
+import { BRANDING_CSS_MAX_LENGTH } from '@documenso/lib/constants/branding';
 import { ZEnvelopeExpirationPeriod } from '@documenso/lib/constants/envelope-expiration';
 import { ZEnvelopeReminderSettings } from '@documenso/lib/constants/envelope-reminder';
 import { SUPPORTED_LANGUAGE_CODES } from '@documenso/lib/constants/i18n';
+import { ZCssVarsSchema } from '@documenso/lib/types/css-vars';
 import { ZDefaultRecipientsSchema } from '@documenso/lib/types/default-recipients';
 import { ZDocumentEmailSettingsSchema } from '@documenso/lib/types/document-email';
 import { ZDocumentMetaDateFormatSchema, ZDocumentMetaTimezoneSchema } from '@documenso/lib/types/document-meta';
 import { DocumentVisibility } from '@documenso/lib/types/document-visibility';
+import { ZSanitizeBrandingCssWarningSchema } from '@documenso/lib/utils/sanitize-branding-css';
 import { zEmail } from '@documenso/lib/utils/zod';
 import { z } from 'zod';
 
@@ -32,6 +35,8 @@ export const ZUpdateOrganisationSettingsRequestSchema = z.object({
     brandingLogo: z.string().optional(),
     brandingUrl: z.string().optional(),
     brandingCompanyDetails: z.string().optional(),
+    brandingColors: ZCssVarsSchema.nullish(),
+    brandingCss: z.string().max(BRANDING_CSS_MAX_LENGTH).optional(),
 
     // Email related settings.
     emailId: z.string().nullish(),
@@ -44,4 +49,6 @@ export const ZUpdateOrganisationSettingsRequestSchema = z.object({
   }),
 });
 
-export const ZUpdateOrganisationSettingsResponseSchema = z.void();
+export const ZUpdateOrganisationSettingsResponseSchema = z.object({
+  cssWarnings: z.array(ZSanitizeBrandingCssWarningSchema).optional(),
+});
diff --git a/packages/trpc/server/team-router/update-team-settings.ts b/packages/trpc/server/team-router/update-team-settings.ts
index 357fd133b..c5db1d12a 100644
--- a/packages/trpc/server/team-router/update-team-settings.ts
+++ b/packages/trpc/server/team-router/update-team-settings.ts
@@ -1,7 +1,9 @@
 import { ORGANISATION_MEMBER_ROLE_PERMISSIONS_MAP } from '@documenso/lib/constants/organisations';
 import { TEAM_MEMBER_ROLE_PERMISSIONS_MAP } from '@documenso/lib/constants/teams';
 import { AppError, AppErrorCode } from '@documenso/lib/errors/app-error';
+import { normalizeBrandingColors } from '@documenso/lib/utils/normalize-branding-colors';
 import { buildOrganisationWhereQuery } from '@documenso/lib/utils/organisations';
+import { type SanitizeBrandingCssWarning, sanitizeBrandingCss } from '@documenso/lib/utils/sanitize-branding-css';
 import { buildTeamWhereQuery } from '@documenso/lib/utils/teams';
 import { prisma } from '@documenso/prisma';
 import { OrganisationType, Prisma } from '@prisma/client';
@@ -43,6 +45,8 @@ export const updateTeamSettingsRoute = authenticatedProcedure
       brandingLogo,
       brandingUrl,
       brandingCompanyDetails,
+      brandingColors,
+      brandingCss,
 
       // Email related settings.
       emailId,
@@ -127,6 +131,27 @@ export const updateTeamSettingsRoute = authenticatedProcedure
       });
     }
 
+    // Sanitize custom branding CSS at write time. `null` means inherit-from-org
+    // for teams, so only run the sanitiser when an explicit string is provided.
+    // An empty string after sanitisation is collapsed to `null` so the team
+    // row inherits rather than persisting an empty override.
+    let cssWarnings: SanitizeBrandingCssWarning[] | undefined;
+    let sanitizedBrandingCss: string | null | undefined;
+
+    if (brandingCss === null) {
+      sanitizedBrandingCss = null;
+    } else if (typeof brandingCss === 'string') {
+      const result = sanitizeBrandingCss(brandingCss);
+      sanitizedBrandingCss = result.css.trim() === '' ? null : result.css;
+      cssWarnings = result.warnings;
+    }
+
+    // Strip empty-string colour values; collapse to `null` when the payload
+    // contains no overrides. For teams this matters because brandingEnabled
+    // = null inherits from the org — leaving `{}` here would persist a real
+    // override of nothing once a team toggles brandingEnabled = true.
+    const normalizedBrandingColors = normalizeBrandingColors(brandingColors);
+
     await prisma.team.update({
       where: {
         id: teamId,
@@ -154,6 +179,8 @@ export const updateTeamSettingsRoute = authenticatedProcedure
             brandingLogo,
             brandingUrl,
             brandingCompanyDetails,
+            brandingColors: normalizedBrandingColors === null ? Prisma.DbNull : normalizedBrandingColors,
+            brandingCss: sanitizedBrandingCss,
 
             // Email related settings.
             emailId,
@@ -168,4 +195,8 @@ export const updateTeamSettingsRoute = authenticatedProcedure
         },
       },
     });
+
+    return {
+      cssWarnings: cssWarnings && cssWarnings.length > 0 ? cssWarnings : undefined,
+    };
   });
diff --git a/packages/trpc/server/team-router/update-team-settings.types.ts b/packages/trpc/server/team-router/update-team-settings.types.ts
index 63cd9a8e6..31ec4c5b0 100644
--- a/packages/trpc/server/team-router/update-team-settings.types.ts
+++ b/packages/trpc/server/team-router/update-team-settings.types.ts
@@ -1,10 +1,13 @@
+import { BRANDING_CSS_MAX_LENGTH } from '@documenso/lib/constants/branding';
 import { ZEnvelopeExpirationPeriod } from '@documenso/lib/constants/envelope-expiration';
 import { ZEnvelopeReminderSettings } from '@documenso/lib/constants/envelope-reminder';
 import { SUPPORTED_LANGUAGE_CODES } from '@documenso/lib/constants/i18n';
+import { ZCssVarsSchema } from '@documenso/lib/types/css-vars';
 import { ZDefaultRecipientsSchema } from '@documenso/lib/types/default-recipients';
 import { ZDocumentEmailSettingsSchema } from '@documenso/lib/types/document-email';
 import { ZDocumentMetaDateFormatSchema, ZDocumentMetaTimezoneSchema } from '@documenso/lib/types/document-meta';
 import { DocumentVisibility } from '@documenso/lib/types/document-visibility';
+import { ZSanitizeBrandingCssWarningSchema } from '@documenso/lib/utils/sanitize-branding-css';
 import { zEmail } from '@documenso/lib/utils/zod';
 import { z } from 'zod';
 
@@ -35,6 +38,8 @@ export const ZUpdateTeamSettingsRequestSchema = z.object({
     brandingLogo: z.string().nullish(),
     brandingUrl: z.string().nullish(),
     brandingCompanyDetails: z.string().nullish(),
+    brandingColors: ZCssVarsSchema.nullish(),
+    brandingCss: z.string().max(BRANDING_CSS_MAX_LENGTH).nullish(),
 
     // Email related settings.
     emailId: z.string().nullish(),
@@ -49,4 +54,6 @@ export const ZUpdateTeamSettingsRequestSchema = z.object({
   }),
 });
 
-export const ZUpdateTeamSettingsResponseSchema = z.void();
+export const ZUpdateTeamSettingsResponseSchema = z.object({
+  cssWarnings: z.array(ZSanitizeBrandingCssWarningSchema).optional(),
+});
diff --git a/packages/ui/primitives/color-picker.tsx b/packages/ui/primitives/color-picker.tsx
index c12deb752..8d9e6fd30 100644
--- a/packages/ui/primitives/color-picker.tsx
+++ b/packages/ui/primitives/color-picker.tsx
@@ -1,7 +1,7 @@
 import type { HTMLAttributes } from 'react';
-import { useState } from 'react';
+import { useEffect, useState } from 'react';
 
-import { HexColorInput, HexColorPicker } from 'react-colorful';
+import { HexColorInput, HexColorPicker, setNonce } from 'react-colorful';
 
 import { cn } from '../lib/utils';
 import { Popover, PopoverContent, PopoverTrigger } from './popover';
@@ -11,6 +11,7 @@ export type ColorPickerProps = {
   value: string;
   defaultValue?: string;
   onChange: (color: string) => void;
+  nonce?: string;
 } & HTMLAttributes<HTMLDivElement>;
 
 export const ColorPicker = ({
@@ -19,6 +20,7 @@ export const ColorPicker = ({
   value,
   defaultValue = '#000000',
   onChange,
+  nonce,
   ...props
 }: ColorPickerProps) => {
   const [color, setColor] = useState(value || defaultValue);
@@ -39,6 +41,12 @@ export const ColorPicker = ({
     onChange(inputColor);
   };
 
+  useEffect(() => {
+    if (nonce) {
+      setNonce(nonce);
+    }
+  }, [nonce]);
+
   return (
     <Popover>
       <PopoverTrigger>
@@ -57,6 +65,7 @@ export const ColorPicker = ({
           color={color}
           onChange={onColorChange}
           aria-disabled={disabled}
+          nonce={nonce}
           {...props}
         />
 
@@ -72,6 +81,7 @@ export const ColorPicker = ({
             }
           }}
           disabled={disabled}
+          nonce={nonce}
         />
       </PopoverContent>
     </Popover>