Mobile logo & menu Storefront Paper

Hi,

I am setting up a new site with woocommerce and the storefront Paper theme. I have made a few banners for the homepage and on a pc it looks quite good. Unfortunately when using a mobile device such as a smartphone the logo and site title and mobile menu are at about half of the total width on the homepage. Also in the cart page the logo is too small. On the shop page is it a normal (full) width.

Can someone help me with this issue. I thought to change the width to 100 % for the body in css, but that didn’t work.

The site isn’t available online for the moment.

Best regards,
Nick