React fill all space as much as possible but #root fixed height and width

I am using React for my project and I want my container div fill all space as much as possible

So my container div has a className called stories but it has a parent div has id called root with a fixed height is 640 and width is 360 and this is my css of div stories:

.stories {
  height: 100vh;
  background-image: linear-gradient(black, #1a1a1a);
  padding: 0;
  margin: 0;
  display: flex;
}

how can I get rid of that, thank you so much and have a good day