I have done most of the job but I'm not sure how to make the left block and right block stitch together as if the left block is on top of the right block to cover the border radius. I tried z-index and position set to absolute for the right block but couldn't make them align perfectly in the middle of the screen and equal size for the two blocks.
In mobile mode, basically the same issue, and not sure why there is a white space at the top of the screen in mobile mode, I made sure to have the margin set to zero.
Much appreciated if anyone can provide some comments. thanks!