/* Mute toggle button — round, floats in the top-right of the stage, just left of the
   fullscreen button (which sits at right:12px). Pairs with sound.js / GameSound.mount. */
.snd-btn{position:absolute;top:12px;right:56px;z-index:4;pointer-events:auto;cursor:pointer;border:none;width:38px;height:38px;border-radius:50%;font-size:17px;line-height:38px;text-align:center;color:#6a5a7a;background:rgba(255,255,255,.92);box-shadow:0 3px 10px rgba(0,0,0,.16)}
.snd-btn:active{transform:translateY(1px);box-shadow:0 1px 6px rgba(0,0,0,.16)}