.btn {
    display: inline-block;
    border-radius: 6px;
    font-weight: 600;
    text-decoration: none;
    color: #fff!important;
    transition: 0.2s;
    text-shadow: 0 0px 10px var(--wp--preset--color--primary);
    -webkit-text-stroke: 2px transparent;

    background-image: url("../../assets/images/text-border.png");
    /* your texture */
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: #fff;
    text-shadow: 0px 0px 0px var(--wp--preset--color--primary);
}