html,
body {
  margin: 0;
  padding: 0;
}

body {
  height: 100vh;
}

#ui {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100vw;
  height: 100vh;
  position: fixed;
  top: 0;
  left: 0;
  p {
    font-size: 20pt;
    color: white;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    font-style: italic;
  }
}

#app,
#ui {
  position: fixed;
  top: 0;
  left: 0;
}