On the page there is a block that climbs under the top block.
Those. red fits under black.
How it was done: in the red block position: relative , top: -50px and z-index: -1 . Now it is necessary to place buttons and links on the red block. But since in the red block z-index: -1 , the buttons are not pressed.
PS Red must be a background, not a picture. And the buttons must be located inside this block.
