html, body {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}


spline-viewer{
    position:fixed;
    z-index:-1;
}

#bg-audio{
    z-index:3;
    pointer-events: auto;
    display : none;
}

.btns{
    position: fixed;   
    top: 25px;         
    right: 3%;         
    z-index: 33;
    pointer-events: auto !important;
    touch-action: manipulation;
}

.mute-btn{
position: relative; 
    width: 66px;  
    height: 66px;
    opacity: 0.5;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    transition: opacity 0.2s ease;
}

.mute-btn:hover{
    opacity:0.9;
    cursor:pointer;
    transition: opacity 0.5s ease-in-out;
    
}

.mute-btn img {
    width: 24px;
    height: 24px;
    display: block;
    pointer-events: none;
}