Hi,
If you look at that area with the grey line with your browser's inspector tool, you can see that it comes from some CSS in the red style file of HikaShop:
monosnap.com/file/YzEWes6280oFRxUSNl12NzTla8pUdw
So you can remove it from that CSS via the CSS area of the HikaShop configuration.
Regarding the title, if you check the code, you can see the classes that you can use in your CSS:
monosnap.com/file/fi2zY0c9pIWNnjFgdN40Pk8DmCrJGB
So for example, such CSS:
.hikashop_product_name_main, .hikashop_product_code_main {
font-size: 2em !important;
}.hikashop_product_code_main {
color: red !important;
}
It's just basic CSS. Please understand that our support is to help you with the use of HikaShop, not to customize it for you. I was nice to give you the solution here but we can't help you for every bit of CSS you'll need. So I would recommend to get used to your browser inspector and CSS. It can be learned rapidely and will help you a lot customize your website, not only HikaShop. So it's a great investment for the future of your website.