*,:before,:after{box-sizing:border-box}html,body{background-color:var(--background);-webkit-user-select:none;user-select:none;height:100%;margin:0;padding:0;overflow:hidden}#stage{width:100%;height:100%;display:block;position:fixed;inset:0}.sound{cursor:pointer;background:0 0;border:0;margin:0;padding:8px;font-size:24px;line-height:1;transition:opacity .6s;position:fixed;top:12px;right:12px}.sound:focus{outline:none}.sound.on{opacity:0}.sound.on:hover,.sound.on:focus-visible{opacity:1}.idle .sound.on{opacity:0}.idle,.idle *{cursor:none!important}