I'm looking to add a new div within the header of my WordPress site. I want this div to be a percentage of the parent div's size, specifically occupying only the right side of the header. Right now, the header contains my logo on the left side, and I want to fill the right side with text. I've tried adjusting padding and font sizes using "em" and "vw", but it doesn't seem to work well because it's based on the entire header size, making alignment challenging.
Current layout:
Desired outcome: