woocommerce/plugins/woocommerce-admin/client/navigation/components/container/style.scss

.woocommerce-navigation {
	h2 {
		color: inherit; // This should be handled at component level.
	}

	.components-navigation {
		height: 100%;
		box-sizing: border-box;
	}

	.components-navigation__menu {
		display: flex;
		flex-direction: column;
		height: 100%;
	}

	.components-navigation__group + .components-navigation__group {
		margin-top: 24px;
	}

	.components-navigation__item {
		margin-bottom: 0;
	}

	.woocommerce-navigation__back-to-dashboard {
		margin-top: 24px;
	}
}