* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { width: 100%; height: 100%; background: #050505; overflow: hidden; touch-action: manipulation; }
#stage { position: relative; width: 100vw; height: 100vh; }
#canvas { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }