* { box-sizing: border-box; }
html, body { width: 100%; height: 100%; margin: 0; overflow: hidden; background: #05060b; }
body { display: grid; place-items: center; color: #fff; font-family: "Courier New", monospace; }
main { width: 100vw; height: 100vh; display: grid; place-items: center; }
canvas { display: block; background: #05060b; }