:root {
  color-scheme: dark;
}

* {
  margin: 0;
  padding: 0;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  background: darkslategrey;
  height: 100vh;
  overflow: hidden;
}

canvas {
  background: #0d1b2a;
}