article{
    background-image: url(img/sea.jpg);
    background-position: center;
    background-repeat: no-repeat;
    z-index: 1;
}

article::after{
    content: "";
    width: 100%;
    height: 100%;
    inset: 0;
    position: absolute;
    background: inherit;
    /* filter: blur(40px) saturate(400%); */
    z-index: -1;
}

article::before{
    content: "";
    width: 100%;
    height: 100%;
    inset: 0;
    position: absolute;
    background: inherit;
    filter: blur(40px) saturate(400%);
    z-index: -1;
}