There are two site templates, the desktop (which is already ok) and the mobile.
On mobile, I want it to display a black background with ONLY an image occupying the center of the screen. EVERY extension (height and width) of the screen has to be just this content. After I press a button, the page scrolls down and the content is displayed.
ThisisanexampleImadeonFiddle: link
But, I'm not sure how I can center the image and leave it as the only content occupying the entire height / height of the page.
How to do this?