How to make this shadow?

Question

css

update. if I write it this way, it will
not work
https://jsfiddle.net/za6nLxsw/1/

in the layout for some reason it is shown as a gradient

background-image: linear-gradient(270deg, rgba(0, 0, 0, 0) 0%, #000000 100%);
opacity: 0.04