Category List Layout Question ...

Hi All,
With respect to the blog category list layout page currently under development (link below).

My client doesn't like the movement when hovering over a category item, but does like the background colour transition. I have been trying to find where that is called, so I can 'turn it off'?.

Unfortunately, so far I have been unable to tweak the only CSS class I have found to have any effect on the movement transition (see below), so wondered if you can point me in the right direction please?.

Best wishes.
Ian
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Category List Link: https://www.helenthomas.uk/performance-diary

Transition CSS?:
/* Transition on category blog posts */
.ba-blog-post {
transition: background-color 0.5s cubic-bezier(0.42, 0, 0.58, 1), padding 0.5s cubic-bezier(0.42, 0, 0.58, 1);
}