Can I use Clean Journal Pro for inspiration?

Hello, Currently, I use the Clean Journal Pro theme for my website. With several design changes, that's why my web developer made a child theme. I'm planning more design changes, based on my current website, and thus inspired by Clean Journal Pro. I also want to focus more on web accessibility, that's why I'm rebuilding my website with custom code. This means that the Clean Journal Pro design remains the basis/inspiration for my website, but I won't be using the theme code anymore. (I still want to mention Clean Journal Pro in the credits-list on my website though.) I don't know if or how the theme's license applies to this situation. That's why I want to check this from a copyright/license perspective. I would love to here from Catch Themes. :) Regards, Jeroen