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

.woocommerce-navigation-header {
	display: flex;
	align-items: center;
	border: none;
	border-radius: 0;
	height: auto;

	.woocommerce-navigation-header__site-icon.components-button {
		padding: 12px;
		height: 60px;
		color: #fff;

		&:hover,
		&:focus,
		&:not([aria-disabled='true']):active {
			color: #fff;
		}
	}

	.woocommerce-navigation-header__site-title.components-button {
		padding-left: 0;
		color: $gray-400;
		font-weight: 600;

		&:hover,
		&:focus,
		&:active {
			color: $gray-200;
		}
	}

	.woocommerce-navigation-header__site-title {
		padding-top: 0;
		display: -webkit-box;
		-webkit-line-clamp: 2;
		-webkit-box-orient: vertical;
		overflow: hidden;
	}
}