body {
  background: black;
}
div{
    margin-top:50px;
}
.sexy_line{
    display:block;
    border:none;
    color:white;
    height:1px;
    background:black;
    background: -webkit-gradient(radial, 50% 50%, 0, 50% 50%, 350, from(#fff), to(#000));
}