diff --git a/apps/api/src/cert-manager/cert-manager.service.ts b/apps/api/src/cert-manager/cert-manager.service.ts
index c9f8430..e69972c 100644
--- a/apps/api/src/cert-manager/cert-manager.service.ts
+++ b/apps/api/src/cert-manager/cert-manager.service.ts
@@ -22,6 +22,8 @@ export interface CertDetails {
 // SplitResponse — the structured result returned by splitCerts
 // ---------------------------------------------------------------------------
 
+export type CertRole = 'root' | 'intermediate' | 'end-entity';
+
 export interface SplitEntry {
   index: number;
   filename: string;
@@ -29,6 +31,7 @@ export interface SplitEntry {
   content: string;
   subject: { cn: string };
   validity: { notAfter: string };
+  certRole: CertRole;
 }
 
 export interface SplitResponse {
@@ -140,6 +143,13 @@ export class CertManagerService {
     return blocks.map((b) => forge.pki.certificateFromPem(b));
   }
 
+  private detectCertRole(cert: forge.pki.Certificate): CertRole {
+    const bc = cert.getExtension('basicConstraints') as { cA?: boolean } | null;
+    if (!bc?.cA) return 'end-entity';
+    // Self-signed = subject hash matches issuer hash → Root CA
+    return cert.subject.hash === cert.issuer.hash ? 'root' : 'intermediate';
+  }
+
   // ---------------------------------------------------------------------------
   // parseCert — CERT-01 + CERT-05 (read half)
   // ---------------------------------------------------------------------------
@@ -364,19 +374,34 @@ export class CertManagerService {
       throw new BadRequestException('Failed to split certificates: invalid format or corrupted file');
     }
 
+    // ── Determine cert roles ───────────────────────────────────────────────
+    const roles: CertRole[] = certs.map((cert) => this.detectCertRole(cert));
+
+    // Build counters for filename disambiguation
+    const roleCounters: Record<CertRole, number> = { root: 0, intermediate: 0, 'end-entity': 0 };
+    const roleFilename = (role: CertRole): string => {
+      roleCounters[role]++;
+      const n = roleCounters[role];
+      if (role === 'root') return n === 1 ? 'root-ca.pem' : `root-ca-${n}.pem`;
+      if (role === 'intermediate') return `intermediate-${n}.pem`;
+      return n === 1 ? 'cert.pem' : `cert-${n}.pem`;
+    };
+
     // ── Build SplitResponse ────────────────────────────────────────────────
     const certEntries: SplitEntry[] = certs.map((cert, index) => {
       const pemStr = forge.pki.certificateToPem(cert);
       const content = Buffer.from(pemStr, 'utf-8').toString('base64');
       const cn: string = cert.subject.getField('CN')?.value ?? '';
       const notAfter: string = cert.validity.notAfter.toISOString();
+      const certRole = roles[index];
 
       return {
         index,
-        filename: `cert-${index + 1}.pem`,
+        filename: roleFilename(certRole),
         content,
         subject: { cn },
         validity: { notAfter },
+        certRole,
       };
     });
 
diff --git a/apps/web/package.json b/apps/web/package.json
index 01fabff..d3ef571 100644
--- a/apps/web/package.json
+++ b/apps/web/package.json
@@ -11,6 +11,7 @@
   },
   "dependencies": {
     "@uiw/react-md-editor": "4.1.1",
+    "fflate": "^0.8.3",
     "jose": "^6.2.3",
     "next": "^15.3.0",
     "next-intl": "^4.13.0",
diff --git a/apps/web/src/app/(portal)/modules/cert-manager/actions.ts b/apps/web/src/app/(portal)/modules/cert-manager/actions.ts
index 36cdd2f..68195ba 100644
--- a/apps/web/src/app/(portal)/modules/cert-manager/actions.ts
+++ b/apps/web/src/app/(portal)/modules/cert-manager/actions.ts
@@ -5,6 +5,8 @@ export const API_URL =
 // SplitResponse — mirrors CertManagerService.SplitResponse
 // ---------------------------------------------------------------------------
 
+export type CertRole = 'root' | 'intermediate' | 'end-entity';
+
 export interface SplitEntry {
   index: number;
   filename: string;
@@ -12,6 +14,7 @@ export interface SplitEntry {
   content: string;
   subject: { cn: string };
   validity: { notAfter: string };
+  certRole: CertRole;
 }
 
 export interface SplitResponse {
diff --git a/apps/web/src/app/(portal)/modules/cert-manager/components/SplitTab.tsx b/apps/web/src/app/(portal)/modules/cert-manager/components/SplitTab.tsx
index 58a5117..cc581bc 100644
--- a/apps/web/src/app/(portal)/modules/cert-manager/components/SplitTab.tsx
+++ b/apps/web/src/app/(portal)/modules/cert-manager/components/SplitTab.tsx
@@ -2,7 +2,8 @@
 
 import { useState } from 'react';
 import { useTranslations } from 'next-intl';
-import { type SplitResponse, splitCertsAction, downloadBase64 } from '../actions';
+import { zipSync } from 'fflate';
+import { type SplitResponse, type CertRole, splitCertsAction, downloadBase64 } from '../actions';
 
 interface SplitTabProps {
   file: File | null;
@@ -10,6 +11,35 @@ interface SplitTabProps {
   password: string;
 }
 
+const ROLE_STYLES: Record<CertRole, string> = {
+  'root':          'bg-red-100 text-red-800 dark:bg-red-900/40 dark:text-red-300',
+  'intermediate':  'bg-amber-100 text-amber-800 dark:bg-amber-900/40 dark:text-amber-300',
+  'end-entity':    'bg-blue-100 text-blue-800 dark:bg-blue-900/40 dark:text-blue-300',
+};
+
+function downloadAllAsZip(certs: SplitResponse['certs'], t: (k: string) => string) {
+  const files: Record<string, Uint8Array> = {};
+  for (const cert of certs) {
+    const bytes = Uint8Array.from(atob(cert.content), (c) => c.charCodeAt(0));
+    // Deduplicate filenames (fflate overwrites silently otherwise)
+    let name = cert.filename;
+    let n = 1;
+    while (name in files) {
+      const base = cert.filename.replace(/\.pem$/, '');
+      name = `${base}-${++n}.pem`;
+    }
+    files[name] = bytes;
+  }
+  const zipped = zipSync(files);
+  const blob = new Blob([zipped], { type: 'application/zip' });
+  const url = URL.createObjectURL(blob);
+  const a = document.createElement('a');
+  a.href = url;
+  a.download = 'certificates.zip';
+  a.click();
+  URL.revokeObjectURL(url);
+}
+
 export function SplitTab({ file, pemText: _pemText, password: _password }: SplitTabProps) {
   const t = useTranslations('certManager');
   const [loading, setLoading] = useState(false);
@@ -36,25 +66,29 @@ export function SplitTab({ file, pemText: _pemText, password: _password }: Split
     }
   }
 
-  const canSplit = Boolean(file);
-
   return (
     <div className="space-y-4">
-      {/* Primary action button */}
-      <button
-        onClick={handleSplit}
-        disabled={loading || !canSplit}
-        className="bg-primary text-primary-foreground px-4 py-2 rounded text-sm font-medium disabled:opacity-50 hover:opacity-90 transition-opacity"
-      >
-        {loading ? t('actions.processing') : t('actions.split')}
-      </button>
+      <div className="flex items-center gap-3">
+        <button
+          onClick={handleSplit}
+          disabled={loading || !file}
+          className="bg-primary text-primary-foreground px-4 py-2 rounded text-sm font-medium disabled:opacity-50 hover:opacity-90 transition-opacity"
+        >
+          {loading ? t('actions.processing') : t('actions.split')}
+        </button>
 
-      {/* Error state */}
-      {error && (
-        <p className="text-sm text-destructive">{error}</p>
-      )}
+        {result && result.certs.length > 1 && (
+          <button
+            onClick={() => downloadAllAsZip(result.certs, t)}
+            className="border border-border px-4 py-2 rounded text-sm font-medium hover:bg-secondary transition-colors"
+          >
+            {t('actions.downloadZip')}
+          </button>
+        )}
+      </div>
+
+      {error && <p className="text-sm text-destructive">{error}</p>}
 
-      {/* Empty state — shown when no result and no error */}
       {!result && !error && (
         <div className="text-center py-8 space-y-1">
           <p className="text-sm font-medium text-foreground">{t('emptyState.split')}</p>
@@ -62,19 +96,23 @@ export function SplitTab({ file, pemText: _pemText, password: _password }: Split
         </div>
       )}
 
-      {/* Per-cert download list */}
       {result && (
         <ul className="space-y-2">
           {result.certs.map((cert) => (
             <li
               key={cert.index}
-              className="flex items-center justify-between rounded bg-secondary px-3 py-2 text-sm"
+              className="flex items-center justify-between rounded bg-secondary px-3 py-2 text-sm gap-3"
             >
-              <div className="min-w-0 flex-1">
-                <span className="font-medium break-all">
+              <div className="min-w-0 flex-1 flex items-center gap-2">
+                <span
+                  className={`shrink-0 inline-block rounded px-2 py-0.5 text-xs font-semibold ${ROLE_STYLES[cert.certRole ?? 'end-entity']}`}
+                >
+                  {t(`certRole.${cert.certRole ?? 'end-entity'}`)}
+                </span>
+                <span className="font-medium truncate">
                   {cert.subject.cn || cert.filename}
                 </span>
-                <span className="ml-2 text-muted-foreground text-xs">
+                <span className="text-muted-foreground text-xs shrink-0">
                   {cert.validity.notAfter}
                 </span>
               </div>
@@ -82,7 +120,7 @@ export function SplitTab({ file, pemText: _pemText, password: _password }: Split
                 onClick={() =>
                   downloadBase64(cert.filename, cert.content, 'application/x-pem-file')
                 }
-                className="ml-3 shrink-0 bg-secondary text-secondary-foreground border border-border px-3 py-1 rounded text-xs font-medium hover:opacity-80 transition-opacity"
+                className="shrink-0 border border-border px-3 py-1 rounded text-xs font-medium hover:bg-background transition-colors"
               >
                 {t('actions.download')}
               </button>
diff --git a/apps/web/src/messages/de.json b/apps/web/src/messages/de.json
index 48894c5..81dc538 100644
--- a/apps/web/src/messages/de.json
+++ b/apps/web/src/messages/de.json
@@ -125,7 +125,16 @@
       "uploadSuccess": "Profilbild wurde erfolgreich aktualisiert.",
       "uploadError": "Hochladen fehlgeschlagen. Bitte pruefen Sie das Dateiformat und die Dateigröße.",
       "ldapManagedNotice": "Ihr Passwort wird ueber das Verzeichnis (LDAP) verwaltet. Eine Aenderung ist hier nicht moeglich.",
-      "passwordSectionTitle": "Passwort aendern"
+      "passwordSectionTitle": "Passwort aendern",
+      "accentColorLabel": "Akzentfarbe",
+      "accentColorHelp": "Passt die Hauptfarbe der Oberflaeche an.",
+      "accentColorReset": "Zuruecksetzen",
+      "accentColorSave": "Farbe speichern",
+      "accentColorSuccess": "Akzentfarbe erfolgreich gespeichert.",
+      "accentColorError": "Speichern fehlgeschlagen.",
+      "deleteAvatarCta": "Bild loeschen",
+      "deleteAvatarSuccess": "Profilbild erfolgreich geloescht.",
+      "deleteAvatarError": "Loeschen fehlgeschlagen."
     },
     "sourceDeleteConfirm": "Moechten Sie diese Kalenderquelle wirklich loeschen?",
     "sourceDeleteCta": "Quelle loeschen",
@@ -463,8 +472,14 @@
       "merge": "Zusammenfuehren",
       "convert": "Konvertieren",
       "download": "Herunterladen",
+      "downloadZip": "Alle als ZIP herunterladen",
       "processing": "Wird verarbeitet..."
     },
+    "certRole": {
+      "root": "Root-CA",
+      "intermediate": "Zwischen-CA",
+      "end-entity": "Zertifikat"
+    },
     "emptyState": {
       "inspect": "Kein Zertifikat geladen.",
       "inspectBody": "Lade eine Datei hoch oder fuege PEM-Text ein.",
diff --git a/apps/web/src/messages/en.json b/apps/web/src/messages/en.json
index ae6fa75..dd33f4e 100644
--- a/apps/web/src/messages/en.json
+++ b/apps/web/src/messages/en.json
@@ -125,7 +125,16 @@
       "uploadSuccess": "Profile picture updated successfully.",
       "uploadError": "Upload failed. Please check the file format and size.",
       "ldapManagedNotice": "Your password is managed via the directory (LDAP) and cannot be changed here.",
-      "passwordSectionTitle": "Change Password"
+      "passwordSectionTitle": "Change Password",
+      "accentColorLabel": "Accent Color",
+      "accentColorHelp": "Customizes the primary color of the interface.",
+      "accentColorReset": "Reset",
+      "accentColorSave": "Save color",
+      "accentColorSuccess": "Accent color saved successfully.",
+      "accentColorError": "Failed to save color.",
+      "deleteAvatarCta": "Delete picture",
+      "deleteAvatarSuccess": "Profile picture deleted successfully.",
+      "deleteAvatarError": "Failed to delete picture."
     },
     "sourceDeleteConfirm": "Are you sure you want to delete this calendar source?",
     "sourceDeleteCta": "Delete source",
@@ -463,8 +472,14 @@
       "merge": "Merge",
       "convert": "Convert",
       "download": "Download",
+      "downloadZip": "Download all as ZIP",
       "processing": "Processing..."
     },
+    "certRole": {
+      "root": "Root CA",
+      "intermediate": "Intermediate CA",
+      "end-entity": "Certificate"
+    },
     "emptyState": {
       "inspect": "No certificate loaded.",
       "inspectBody": "Upload a file or paste PEM text.",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index a00c66d..cdab648 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -169,6 +169,9 @@ importers:
       '@uiw/react-md-editor':
         specifier: 4.1.1
         version: 4.1.1(@types/react@19.2.17)(react-dom@19.2.7(react@19.2.7))(react@19.2.7)
+      fflate:
+        specifier: ^0.8.3
+        version: 0.8.3
       jose:
         specifier: ^6.2.3
         version: 6.2.3
@@ -3163,6 +3166,9 @@ packages:
       picomatch:
         optional: true
 
+  fflate@0.8.3:
+    resolution: {integrity: sha512-tbZNuJrLwGUp3zshBtdy4W+ORxZuIh8a5ilyIEQDC5rY1f3U20JMry0Ll3WBzU58EZKsEuJFXhb5gwv8CsPvgA==}
+
   file-type@21.3.4:
     resolution: {integrity: sha512-Ievi/yy8DS3ygGvT47PjSfdFoX+2isQueoYP1cntFW1JLYAuS4GD7NUPGg4zv2iZfV52uDyk5w5Z0TdpRS6Q1g==}
     engines: {node: '>=20'}
@@ -8525,6 +8531,8 @@ snapshots:
     optionalDependencies:
       picomatch: 4.0.4
 
+  fflate@0.8.3: {}
+
   file-type@21.3.4:
     dependencies:
       '@tokenizer/inflate': 0.4.1