Sibling/Child Hover Interactions Directly In Designer (No Need To Toggle Preview)

Usually, when you want to preview your hover animations/interactions that involve siblings or children, you have to either go into preview mode or publish the site. Well, what if I told you with a little bit of CSS, you can view some of your hover animations directly in designer without having to toggle into preview mode. Walkthrough: https://www.youtube.com/watch?v=YCsu9W2VwxU