* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; overflow: hidden; }
body { background: #000; display: flex; align-items: center; justify-content: center; }
.app { width: 100%; height: 100vh; height: 100dvh; display: flex; }
.game-wrap { flex: 1; display: flex; }
#gameCanvas { background: #0a0a2e; display: block; width: 100%; height: 100%; image-rendering: -webkit-optimize-contrast; image-rendering: crisp-edges; }