Hello Jamie,
Thanks for asking.
I am not quite sure what you meant by on it’s own. However, do make the necessary changes please add following CSS under X/Pro > Theme Options > CSS:
.x-nav-tabs>.active>a, .x-nav-tabs>.active>a:hover {
background-color: #ddd;
border: 0;
}
.x-tab-content>.active {
background-color: #ededed;
}
.x-nav-tabs.two-up>li {
border: 0;
}
.x-tab-content {
border: 0;
}
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.