Datafeedr Random Ads plugin – Can't click links?

Setting up a WordPress site, I’ve figured out how to get rotating ad banners into the header using the “Datafeedr Random Ads plugin” but they are not clickable. I have the “<a href…” code for each banner. It’s almost as if the ad banners are underneath some other layer.

I’ve tried altering the template’s style.css file to mixed results:

Right now I used “position: absolute” to position the ad banners on the right half of the header. Alignment is correct, I just can’t click the ad banner to follow the URL attached to the ad banner.

I tried “position: relative” and I did manage to get the ad banners clickable and working – but now they were positioned dead center in the header, covering part of the site logo, and the main body of the webpage moved down 100-200 pixels, making the whole webpage look weird.

I’m guessing there’s one small piece of code that will fix this, but I’m learning .php and .css as I come across it, so I’m kind of stuck. Any suggestions?