#radio-bg{

position:fixed;
top:0;
left:0;

width:100%;
height:100%;

background-size:cover;
background-position:center;

transform:scale(1.05);

z-index:-1;

transition:opacity 1s ease;

}

#radio-bg::after{

content:"";

position:absolute;
top:0;
left:0;

width:100%;
height:100%;

background:rgba(0,0,0,0.55);

}