canvas 
{ 
    display: block;  
}

#main-canvas
{
    position:fixed; inset:0; 
    z-index:1000;
    background:transparent !important;
    pointer-events:none; 
    display:block;
}

#sound-toggle 
{
    position: fixed;
    right: 35px;
    bottom: 5px;
    z-index: 1001;
    padding: 0px 5px;
    border-radius: 10px;
    border: 0;
    background: rgba(30,30,30,.75);
    color: #fff;
    font-size: 10px;
    cursor: pointer;
    backdrop-filter: blur(6px);
}

#sound-toggle.muted { opacity: .6 }