Im not sure if you meant to do this, but you've got your content on position: fixed
and the background scrollable.
You'll need to remove the position: fixed
on the content container and add it to the background instead.
EDIT:
If you want to have your text over the image as you have currently, either change the picture of the woman to a background-image
on the inner-cover
or cover-container
divs or add position: absolute
to your content and add top: Ypx
, Y being the distance from the top of the page.