main::before {
    content: "";

    background-image: linear-gradient(319deg, var(--bg-secondary) 16px, transparent 17px), linear-gradient(39deg, black 16px, transparent 17px);
    background-size: 54px 23px;
    background-repeat: repeat-x;
    display: block;
    width: 100%;
    height: 100px;
    position: absolute;
    top: -23px;
}