diff --git a/scss/components/_mainWindow.scss b/scss/components/_mainWindow.scss
index a32cade680..1f6603e07b 100644
--- a/scss/components/_mainWindow.scss
+++ b/scss/components/_mainWindow.scss
@@ -140,3 +140,8 @@
 :is(panel)::part(content) {
 	--panel-background: var(--material-toolbar);
 }
+
+#zotero-pane-stack > hbox {
+	// Let window chrome, tabs, and toolbar shrink even when sidebars overflow
+	min-width: 0;
+}