Single-page developer portfolio (HTML + CSS)

For this challenge, I used just HTML and CSS. The most challenging piece BY FAR were the overlaid rings/circle background images. I spent so much time figuring out how to prevent horizontal scrolling after adding the two images on the right.

My main question - is there a better way to go about placing these background images? I used px with absolute positioning, so I'm not sure how much of an issue this is in terms of responsiveness. I also couldn't figure out how to properly place the rings image (in the skills section) when on desktop.

Any and all feedback welcome - thank you!