Hi @core365,
Thanks . for writing in and the URL!
Can you please try this CSS and let us know if that works.
.x-navbar-fixed-top-active .masthead {
position: fixed;
width: 100%;
z-index: 9999;
}
Hope that helps!
This is something related to a custom CSS code and further customization is out of our theme support scope.
If you would like to learn CSS, I am sharing few resources that you take a look to get started with CSS and an interesting tool that you can use to speed up the development process.
I recommend you to watch following video that will help you to get started with CSS.
https://www.youtube.com/watch?v=MFR4WXiLzpc
Sometimes it can get a bit difficult to find out the right selector to be able to write the required CSS codes. A handy tool that can help you in this is Google Chrome dev tools. I am sharing the resource that you can refer to get started with dev tools.
https://developers.google.com/web/tools/chrome-devtools/css/
https://developers.google.com/web/tools/chrome-devtools/
https://www.youtube.com/watch?v=tP_kXBJWPhQ&t=200s
Thanks.