How to stretch background-image?

Question

css

Hello! How to stretch background-image joxi.ru/bmoYnPRHMZbeNA ?
background-size - does not help, in fact - the gradient is drawn only in the visible area, and below it does not draw for some reason (

Answer 1

background-attachment: fixed; for Body

Answer 2

You do not need to stretch the gradient, but the block in which this gradient is stretched to the size of the content.
Perhaps it's easier to add two gradients to the inner block with text?