* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { width: 100%; height: 100%; }
body {
  background: #0a0a0f;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
}
#app {
  width: 100vmin;
  height: 100vmin;
  position: relative;
  overflow: hidden;
}
canvas {
  width: 100%;
  height: 100%;
  display: block;
}