:root{color-scheme:light}*{box-sizing:border-box}body{margin:0;font-family:Trebuchet MS,Segoe UI,sans-serif;background:radial-gradient(circle at top,#112241,#0a1326 55%,#060a16);color:#eaf1ff}#app{min-height:100vh}.app-shell{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:12px}.game-frame{width:min(100%,560px);aspect-ratio:9 / 16;border-radius:16px;overflow:hidden;border:2px solid #2b426e;box-shadow:0 20px 48px #00000073;background:#120c26}.game-frame canvas{display:block;width:100%;height:100%}