I am trying to make a flexbox design work. I am not an HTML/css expert. :(
I have a flexbox design with fixed header and footer and content that occupies the rest of
It sounds like what you want are multiple elements in the content section that basically take up the entire page in size, but that you can scroll through.
Let's call these elements in the content section "slide"s.
The easiest way to achieve this would be to set the minimum dimensions of these elements, something like -
.content .slide {
min-width:100vw;
min-height:100vh;
}
This will make sure, even if the content within the slide's doesn't take up the entire space, it will remain at full size.