How to change the dimensions of the slideshow

[CreatorTim]

Hi, I want to add iPhone footage to my slideshow, so I need to change the dimensions. I’ve already made some adjustments using this code:

.slideshow__media img {
  max-height: 600px;
  width: auto;
  height: auto;
  display: block;
  margin: 0 auto;
}
.slideshow__slide {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  height: auto;
  min-height: auto;
}
.slideshow {
  max-height: 600px;
  overflow: hidden;
}

And this is how it looks:

Now, I want to align the image to the center and remove the entire gray rectangle background. So basically, I just want the image to be centered without the background or wtf is that.

Here’s my store: https://creationwithtim.com/products/cinematiq-lut-collection-copy

Thanks a lot,
Tim