Playing with css and bubble responsiveness

Hi there,
I have existential questions about how bubble handle responsiveness and layout, especially vertically…
I wanted to use a little script dynamically setting the height of an element (so that a section or an image takes up the entire page until the user scrolls ( I cannot find an exemple, but I definitely saw that a few times), but it always ends up messing with the layout and creating big white holes in my design…

Is there a way to change the height of a group in a maneer that other elements adapt as they do when a multiline input grows or shrinks ?
Thanks