Slider behaviour mobile

Hello everyone,

I noticed that the slider is not showing efficiently the title, description and the button if I reduce its height below 400-300.

My desired effect is to have a wide but narrow image on desktop and a a similar one on mobile. However, when I insert for instance 250px in the “customize slider height” it shows ok on desktop but it can’t show properly the title, description and the most important element: the button.
How can I optimize it better? Because now I am forced to use a much higher height value to make it usable on mobile. But in this way on desktop is just too huge for me.

The page I need help with: [log in to see the link]