Please help solve the problem.
We have a header which is a picture with the logo and the vertical menu. the header is set to: position:
fixed; left: 0; top: 0; width: 100%; z-index: 10;
next we have a main which has a slider made swiper. each slide has the content ( left block h1 + p + button ) with the right picture.
Since we have the header has a fixed position - the slider goes under the header and all becomes as it should, but the problem in fact that you need to center the content inside the slider ( the left text block, and right image ) in the center ( using Flex ), the problem is that the centering occurs from the top of the screen, and you need that from the bottom of the header which is our logo+ menu.