*{margin:0;padding:0;box-sizing:border-box;font-family:sans-serif}
body{background:#000;touch-action:none;-webkit-user-select:none;user-select:none;overflow:hidden}
canvas{display:block;margin:0 auto;background:url('assets/hintergrund.jpg') no-repeat center/cover}

.overlay{
  position:fixed;inset:0;display:flex;flex-direction:column;
  justify-content:center;align-items:center;color:#fff;
  background:rgba(0,0,0,.8);text-align:center;z-index:10
}
.hidden{display:none}
button{
  padding:.8rem 2.2rem;font-size:1.2rem;border:none;border-radius:4px;
  background:#38f;color:#fff;cursor:pointer
}
button:active{transform:scale(.95)}