diff --git a/scripts/instance_navigation.py b/scripts/instance_navigation.py
index 0099ef7..6cf937c 100644
--- a/scripts/instance_navigation.py
+++ b/scripts/instance_navigation.py
@@ -88,10 +88,7 @@ def render(instance):
 .cockpit-idle{border:1px solid var(--shell-line);border-radius:8px;background:var(--shell-alt);color:var(--shell-soft);min-height:44px;padding:.35rem .65rem;font-family:inherit;font-size:.78rem;font-weight:700;letter-spacing:.04em;white-space:nowrap;opacity:.7}
 .cockpit-idle span{color:var(--shell-grey);margin-right:.35em}
 .instance-nav{background:var(--shell-alt);border-bottom:1px solid var(--shell-line)}
-.instance-nav .nav-scroll{max-width:1160px;margin:auto;overflow-x:scroll;overscroll-behavior-x:contain;scrollbar-width:thin;scrollbar-color:var(--shell-grey) var(--shell-alt);padding:.45rem .5rem;box-sizing:border-box}
-.instance-nav .nav-scroll::-webkit-scrollbar{height:8px}
-.instance-nav .nav-scroll::-webkit-scrollbar-track{background:var(--shell-alt)}
-.instance-nav .nav-scroll::-webkit-scrollbar-thumb{background:var(--shell-grey);border-radius:4px}
+.instance-nav .nav-scroll{overflow-x:auto;overscroll-behavior-x:contain;scrollbar-width:thin;padding:.45rem .5rem;box-sizing:border-box}
 .instance-nav ul{display:flex;gap:.3rem;list-style:none;width:max-content;margin:0 auto;padding:0}
 .instance-nav .board-link{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.15rem;min-width:76px;min-height:64px;padding:.4rem .65rem;border:1px solid transparent;border-radius:12px;color:var(--shell-soft);font-size:.8rem;font-weight:650;text-decoration:none;box-sizing:border-box}
 .instance-nav .board-link:hover{background:var(--shell-bg);color:var(--shell-text)}
diff --git a/tests/navigation_browser.cjs b/tests/navigation_browser.cjs
index 0bbd2ad..d8c308b 100644
--- a/tests/navigation_browser.cjs
+++ b/tests/navigation_browser.cjs
@@ -30,9 +30,10 @@ const assert = require('node:assert/strict');
     assert.equal((await page.locator('.cockpit-home').innerText()).replace(/\s+/g,' '),'MyScientist / Cockpit');
     assert.equal(await page.locator('.cockpit-idle').isDisabled(),true);
     assert.equal(await page.locator('#cockpit-heading').textContent(),'Scientist');
-    assert(await page.locator('.nav-scroll').evaluate(el=>el.scrollWidth>el.clientWidth));
-    assert.equal(await page.locator('.nav-hint').isVisible(),true);
-    assert.equal(await page.locator('.nav-scroll').evaluate(el=>getComputedStyle(el).overflowX),'scroll');
+    const overflows=await page.locator('.nav-scroll').evaluate(el=>el.scrollWidth>el.clientWidth);
+    assert.equal(overflows,width<1440);
+    assert.equal(await page.locator('.nav-hint').isVisible(),overflows);
+    assert.equal(await page.locator('.nav-scroll').evaluate(el=>getComputedStyle(el).overflowX),'auto');
     const initialToolbar=await page.locator('.cockpit-toolbar').boundingBox();
     await page.locator('#scientist').evaluate(el=>el.scrollTop=500);
     assert.equal((await page.locator('.cockpit-toolbar').boundingBox()).y,initialToolbar.y);