index.css

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #000010;
  color: white;
}

#root {
  width: 100%;
  height: 100%;
}

/* Remove default focus outlines during gameplay */
*:focus {
  outline: none;
}