*{box-sizing:border-box}html,body{margin:0;height:100%;overflow:hidden;background:#0b0e1a}#game-container{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center}#game-container canvas{max-width:100%;max-height:100dvh}.back-link{position:fixed;top:12px;left:12px;z-index:10;color:#9aa3c7;font-family:monospace;font-size:13px;text-decoration:none;padding:8px 12px;background:#0b0e1a99;border-radius:8px}.back-link:active{color:#e8ecff}