Hi Jay,
Thank you for reaching out to us. To achieve this in X, you can add the following code in the Theme Options > CSS:
@media screen and (min-width: 989px) {
.home header.masthead {
position: absolute;
width: 100%;
}
.home .x-navbar {
background: rgba(255,255,255,0.4) !important;
}
}
You can also refer to the following code snippet for future reference https://theme.co/apex/forum/t/code-snippet-stack-the-navbar-over-the-masthead-slider/275
Feel free to make adjustments to the code provided above as per your need. 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
Hope this helps!