:root{--grain:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='220'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/></filter><rect width='220' height='220' filter='url(%23n)' opacity='0.6'/></svg>")}