.btn:after{background:linear-gradient(130deg,#3d3d3d00 45%,#9a98de4d 50%,#3d3d3d00 60%);background-position-x:100%;background-size:500%;border-radius:100px;content:"";filter:blur(8px);inset:-10px 0 0;mix-blend-mode:color-dodge;position:absolute;z-index:5}