html,body{margin:0;height:100%;background:#0e0e0e;}
#stage{position:fixed;inset:0;overflow:hidden;background:#f5efe3;}
.spa-frame{position:absolute;inset:0;width:100%;height:100%;border:0;background:#fff;opacity:0;
  transition:opacity .3s ease;z-index:1;pointer-events:none;}
.spa-frame.active{opacity:1;z-index:2;pointer-events:auto;}
#spa-boot{position:fixed;left:0;right:0;top:0;bottom:0;display:none;align-items:center;justify-content:center;
  background:#12100c;color:#c8a56a;font:15px/1.5 system-ui,-apple-system,"PingFang SC",sans-serif;z-index:9;}
#spa-boot.hidden{opacity:0;pointer-events:none;transition:opacity .4s ease;}