Adds a grid background gradient pattern to a container

grid-background.css

 .grid-background {
    background-image: linear-gradient(90deg, #f1f2f4 1px, transparent 0), linear-gradient(180deg, #f1f2f4 1px, transparent 0);
    background-position: 50% calc(100% - 1px);
    background-size: 3rem 3rem;
    margin: -80px 0 4em;
    padding: 180px 0;
    position: relative;
}