*{box-sizing:border-box}html,body{color:#f4f7fb;background:#10151d;width:100%;height:100%;margin:0;font-family:Segoe UI,Yu Gothic UI,Meiryo,sans-serif;overflow:hidden}#app{background:linear-gradient(#ffffff0a,#0000 42%),#10151d;place-items:center;width:100vw;height:100vh;display:grid}#game{background:#f7f5ed;width:min(100vw,177.778vh);height:min(100vh,56.25vw);display:block}