How to adjust last section in flex-column to shrink its content?

Hi, I couldn't answer on google and I am out of options. The problem basically is that I have page works as a presentations (I am using FullPageJs for this) and all content should adjust its height to fint into whole screen. I got one section when I have toolbar, categories and products as images. To achieve this I am using of course display: flex; with column. Is there any way that last section with images shrink according to space left and won't exceed 100vh?