react/fixtures/fiber-debugger/src/index.css

html, body {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
  height: 100vh;
  cursor: -webkit-grab; cursor: -moz-grab;
}

#root {
  height: 100vh;
}

* {
  box-sizing: border-box;
}