diff --git a/src/OberleisteApp.jsx b/src/OberleisteApp.jsx
index 867da81..5202e4c 100644
--- a/src/OberleisteApp.jsx
+++ b/src/OberleisteApp.jsx
@@ -102,6 +102,7 @@ function BarSelect({ icon, value, onChange, title, disabled, width, children })
               style={{ color: 'var(--text-muted)', flexShrink: 0 }} />
       )}
       <select
+        className="native-control"
         value={value || ''}
         disabled={disabled}
         onChange={(e) => onChange(e.target.value)}
@@ -400,6 +401,7 @@ export default function OberleisteApp() {
       {customMode ? (
         <input
           ref={customInputRef}
+          className="native-control"
           disabled={isPerspective}
           type="text" placeholder="1:N"
           value={draft}
@@ -423,7 +425,7 @@ export default function OberleisteApp() {
           value={dropdownValue}
           onChange={(v) => applyDropdown(v)}
           disabled={isPerspective}
-          width={120}
+          width={140}
           title="Gesetzter Massstab"
         >
           <option value="__none__">—</option>
diff --git a/src/index.css b/src/index.css
index e022e42..37d365b 100644
--- a/src/index.css
+++ b/src/index.css
@@ -196,6 +196,33 @@ select:hover {
   border-color: var(--text-muted);
 }
 
+/* Opt-out: System-native Chrome (Oberleiste). Setzt die globalen
+   pill/appearance:none Overrides zurueck und ueberlaesst WebKit das
+   Rendering — Standard-macOS-Combobox + Native-Popup-Menue. */
+select.native-control,
+input.native-control {
+  appearance: auto;
+  -webkit-appearance: auto;
+  background: revert;
+  background-image: none;
+  border: revert;
+  border-radius: revert;
+  padding: revert;
+  font: revert;
+  letter-spacing: revert;
+  box-shadow: none;
+}
+select.native-control:hover,
+input.native-control:hover {
+  background: revert;
+  border-color: revert;
+}
+select.native-control:focus,
+input.native-control:focus {
+  box-shadow: revert;
+  border-color: revert;
+}
+
 /* Utility */
 .label-xs {
   font-size: 10px;