.blur-edges {
    position: relative;
    overflow: hidden;
}

.blur-edges img {
    display: block;
    width: 100%;
}

.blur-edges:after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    background: radial-gradient(circle, rgba(0,0,0,0) 60%, rgba(0,0,0,1) 100%);
    filter: blur(40px);
}