Hello @Lobsterass,
You can target it by using the Header bar scroll class, you can use the scroll class and add custom style according to that CSS class.
On scroll CSS selector for the styling .x-bar.x-bar-is-sticky.x-bar-fixed
Let’s take an example of the Image element for the logo that you have used. Using the scroll CSS selector you can add a custom element style, you need to go to Image Element —>Customize—>Element CSS.
.x-bar.x-bar-is-sticky.x-bar-fixed $el.x-image {
width: 10vw;
}
You can follow the same process for the elements as well. Please feel free to change the width as per your design. The purpose of providing custom CSS is to show you how to add CSS code to your site. Writing custom CSS is outside the scope of our theme support. If you need more customization, you need to learn CSS and learn how to use the browser’s element inspector or you subscribe to One where customization questions are answered.
Hope it helps.
Thanks