body::before{

    content:'';

    position:fixed;

    top:-300px;
    left:-300px;

    width:700px;
    height:700px;

    background:rgba(0,217,255,.08);

    border-radius:50%;

    filter:blur(180px);

    z-index:-2;

}

body::after{

    content:'';

    position:fixed;

    bottom:-300px;
    right:-300px;

    width:700px;
    height:700px;

    background:rgba(0,217,255,.06);

    border-radius:50%;

    filter:blur(180px);

    z-index:-2;

}