diff --git a/i18n/default_de.json b/i18n/default_de.json
index 391624d..b358daf 100644
--- a/i18n/default_de.json
+++ b/i18n/default_de.json
@@ -977,6 +977,11 @@
   "All API tokens will be revoked immediately.": "Alle API-Tokens werden sofort widerrufen.",
   "API token default lifetime is invalid": "Standardlaufzeit für API-Tokens ist ungültig",
   "API token max lifetime is invalid": "Maximale Laufzeit für API-Tokens ist ungültig",
+  "nav.logs.mail": "E-Mail",
+  "nav.audit.api": "API",
+  "nav.audit.system": "System",
+  "nav.audit.imports": "Importe",
+  "nav.audit.user_lifecycle": "Benutzer-Lifecycle",
   "API audit": "API-Protokolle",
   "API audit logs": "API-Protokolle",
   "Request ID": "Request-ID",
diff --git a/i18n/default_en.json b/i18n/default_en.json
index 732ddd5..2881ffd 100644
--- a/i18n/default_en.json
+++ b/i18n/default_en.json
@@ -977,6 +977,11 @@
   "All API tokens will be revoked immediately.": "All API tokens will be revoked immediately.",
   "API token default lifetime is invalid": "API token default lifetime is invalid",
   "API token max lifetime is invalid": "API token max lifetime is invalid",
+  "nav.logs.mail": "E-mail",
+  "nav.audit.api": "API",
+  "nav.audit.system": "System",
+  "nav.audit.imports": "Imports",
+  "nav.audit.user_lifecycle": "User lifecycle",
   "API audit": "API logs",
   "API audit logs": "API logs",
   "Request ID": "Request ID",
diff --git a/modules/audit/module.php b/modules/audit/module.php
index d852116..61d9fa6 100644
--- a/modules/audit/module.php
+++ b/modules/audit/module.php
@@ -50,7 +50,7 @@ return [
             [
                 'key' => 'audit-api-audit',
                 'group' => 'admin-logs',
-                'label' => 'API audit',
+                'label' => 'nav.audit.api',
                 'path' => 'audit/api-audit',
                 'permission' => 'audit.api.view',
                 'order' => 200,
@@ -58,7 +58,7 @@ return [
             [
                 'key' => 'audit-system-audit',
                 'group' => 'admin-logs',
-                'label' => 'System audit logs',
+                'label' => 'nav.audit.system',
                 'path' => 'audit/system-audit',
                 'permission' => 'audit.system.view',
                 'order' => 210,
@@ -66,7 +66,7 @@ return [
             [
                 'key' => 'audit-import-audit',
                 'group' => 'admin-logs',
-                'label' => 'Import logs',
+                'label' => 'nav.audit.imports',
                 'path' => 'audit/import-audit',
                 'permission' => 'audit.imports.view',
                 'order' => 220,
@@ -74,7 +74,7 @@ return [
             [
                 'key' => 'audit-user-lifecycle-audit',
                 'group' => 'admin-logs',
-                'label' => 'User lifecycle logs',
+                'label' => 'nav.audit.user_lifecycle',
                 'path' => 'audit/user-lifecycle-audit',
                 'permission' => 'audit.user_lifecycle.view',
                 'order' => 230,
diff --git a/web/css/layout/app-shell.css b/web/css/layout/app-shell.css
index 56ecdfb..76c36b5 100644
--- a/web/css/layout/app-shell.css
+++ b/web/css/layout/app-shell.css
@@ -2141,10 +2141,11 @@
   }
 
   details summary {
-    line-height: var(--leading-none);
+    line-height: var(--leading-tight);
     list-style-type: none;
     cursor: pointer;
     transition: color var(--app-transition);
+    vertical-align: middle;
   }
 
   details summary:not([role]) {
diff --git a/web/css/layout/app-sidebar.css b/web/css/layout/app-sidebar.css
index 5bc5e97..5bfa0d5 100644
--- a/web/css/layout/app-sidebar.css
+++ b/web/css/layout/app-sidebar.css
@@ -37,10 +37,42 @@
   }
 
   .app-sidebar-group.app-sidebar-admin-group details summary i {
-    font-size: 10px; /* icon-font metric — intentional px */
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    font-size: 10px;
+    width: 1.45rem;
+    height: 1.45rem;
+    border-radius: 6px;
+    background: color-mix(
+      in srgb,
+      var(--app-nav-icon-color, var(--app-primary)) 15%,
+      transparent
+    );
+    color: var(--app-nav-icon-color, var(--app-primary));
+    margin-right: 0.1rem;
     position: relative;
-    top: -2px;
-    margin-right: 3px;
+    top: -1px;
+  }
+
+  /* Per-group icon colors */
+  .app-sidebar-admin-group [data-details-key="admin-organization"] {
+    --app-nav-icon-color: #2563eb;
+  }
+  .app-sidebar-admin-group [data-details-key="admin-roles-permissions"] {
+    --app-nav-icon-color: #7c3aed;
+  }
+  .app-sidebar-admin-group [data-details-key="admin-automation"] {
+    --app-nav-icon-color: #0891b2;
+  }
+  .app-sidebar-admin-group [data-details-key="admin-monitoring"] {
+    --app-nav-icon-color: #059669;
+  }
+  .app-sidebar-admin-group [data-details-key="admin-logs"] {
+    --app-nav-icon-color: #d97706;
+  }
+  .app-sidebar-admin-group [data-details-key="admin-system"] {
+    --app-nav-icon-color: #6b7280;
   }
 
   aside.app-sidebar li:has(> .app-empty-state) {
@@ -191,9 +223,9 @@
   .app-sidebar a:hover,
   .app-sidebar a.active,
   .app-sidebar .active > a {
-    color: var(--app-primary);
+    color: var(--app-nav-icon-color, var(--app-primary));
     background: var(--app-sidebar-hover-bg);
-    border-left: var(--app-sidebar-border-width) solid var(--app-primary);
+    border-left: var(--app-sidebar-border-width) solid var(--app-nav-icon-color, var(--app-primary));
   }
 
   aside.app-sidebar ul,
@@ -230,10 +262,7 @@
     margin: 0;
   }
 
-  .app-sidebar
-    .app-sidebar-group
-    details[open]
-    > summary:not([role]) {
+  .app-sidebar .app-sidebar-group details[open] > summary:not([role]) {
     margin-bottom: 7px;
   }
 
@@ -256,6 +285,10 @@
     max-width: var(--app-sidebar-summary-max-width);
     overflow: hidden;
     white-space: nowrap;
+    font-size: var(--text-base);
+    font-weight: var(--font-normal);
+    position: relative;
+    top: 2px;
   }
 
   .app-sidebar #aside-panel-admin > ul {
@@ -265,10 +298,13 @@
   }
 
   .app-sidebar #aside-panel-admin .app-sidebar-admin-group {
-    margin-bottom: 10px;
     width: 100%;
   }
 
+  .app-sidebar #aside-panel-admin .app-sidebar-admin-group:last-child {
+    margin-bottom: 0;
+  }
+
   .app-sidebar
     #aside-panel-admin
     .app-sidebar-admin-group