:root {
  --paper: #ffffff;
}

* {
  box-sizing: border-box;
}

html,
body,
main {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
}

body {
  background: var(--paper);
}

canvas {
  position: fixed;
  inset: 0;
  display: block;
  cursor: default;
}