/*
 * Loaded after Aura.STYLESHEET — SideNav expand chevron: drop border only.
 * Aura names this part toggle-button (not toggle).
 * Firefox keeps native button chrome unless appearance is reset.
 */
vaadin-side-nav-item::part(toggle-button),
vaadin-side-nav::part(toggle-button) {
	appearance: none;
	-moz-appearance: none;
	--vaadin-button-border-width: 0 !important;
	border: none !important;
	border-width: 0 !important;
	border-color: transparent !important;
	outline: none !important;
	box-shadow: none !important;
	background: transparent !important;
}