body{
background:black;
}

#paper {
position:absolute;
z-index:0;
display:block;
height:100%;
width: 100%;  
margin: 0 ;
}

svg{
background: radial-gradient(
rgba(70, 176, 183,.3) 0%,rgba(0, 0, 0,.2) 42vh ,black);
width:86vh;
height:86vh;
position:absolute;
top:50%;
left:50%;
border-radius:100%;
transform:translate(-50%,-50%);
}