On smaller screens the text in the slider is shown up on top of each other or only partially shown. As you can see in the attached screenshot the Read more is not visible anymore. This is an example on your demo page I made the browser windows smaller.
It would be great if the fonts would be made smaller or some parts of the text might be dropped completely.
I have edited the Custom CSS somewhat similar to what you wrote. I added some additional rules since I’m using a different font and the needed values for my solution are a bit different.