.check{background-image:linear-gradient(45deg,#f3f4f6 25%,transparent 0,transparent 75%,#f3f4f6 0,#f3f4f6),linear-gradient(45deg,#f3f4f6 25%,transparent 0,transparent 75%,#f3f4f6 0,#f3f4f6);background-position:0 0,16px 16px;background-size:32px 32px}