:root{--bg: #0b0b10;--fg: #eaeaf0}html,body{margin:0;height:100%;background:var(--bg);color:var(--fg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;overflow:hidden}#app{position:relative;width:100vw;height:100vh}.game-canvas{display:block;width:100%;height:100%;touch-action:none;cursor:crosshair;user-select:none}