.grainy:before {
    content: "";
    background-color: transparent;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 600 600'%3E%3Cfilter id='a'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23a)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 182px;
    opacity: 0.12;
    top: 0;
    left: 0;
    position: absolute;
    width: 100%;
    height: 100%;
}