white bg still appearing on mobile

You are using UberMenu WordPress plugin which is producing navigation for you. We do not provide support about third party plugins if you want us to provide you help to get overlay of navigation you need to get our theme back without help of third party plugins which can interfere with our work thanks.

hi Support,

I have removed the UberMenu from my website, can you please check now. If you can remove the white bg on top on the website for MOBILE version.

thanks

@media only screen and (max-width: 40em) {
	.header.sticky .row .columns.small-12 {
		width:50%;
	}
}

Add this CSS into your wp-admin >> Appearance >> Customize >> Additional CSS

Once this code is added then i will see more configurations required to suggest you.