You are free to modify the visual appearance of the related blocks on your web pages. There are two ways to change the visual styling of blocks.
Directly edit the style files of the Automatic Related Products module. In this way, it is possible to modify the default and "bulletproof" templates. Remember to back up your modified files before updating the extension to a new upgraded version.
Add any additional styles to the extension via the Magento backend admin panel without file modifications. Navigate to backend > Stores > Configuration > Mirasvit Extensions tab > Developer > CSS Settings > Additional CSS Styles. With this option, it is not possible to specify an individual style for each block of related products. All CSS changes will be applied for each block identically.
Please note: after each adjustment, the Magento cache should be flushed.