style body min height 300px style div style position fixed important left 0px important top 0px important border 1px solid green width 100vw important height 100vh background image linear gradient 90deg black black 50 rgba 0 0 0 0 url https notebook xbdev net var images test512 png background size 100 100 z index 2000 important div
height 100vh background image linear gradient 90deg black black 50 rgba 0 0 0 0 url https notebook xbdev net var images test512 png background size 100 100 z index 2000 important div