body {
  margin: 0;
  position: absolute;
  inset: 0 !important;
}
#app {
  position: absolute;
  inset: 0 !important;
  background: url(https://i.imgur.com/GsWuLO8.png);

  background-clip: padding-box;
  background-size: cover;
  background-repeat: no-repeat;
  display: flex;
  justify-content: center;
  align-items: center;
}
#app::before {
  content: "";
  background-color: rgba(0, 0, 0, 0.85);
  position: absolute;
  inset: 0 !important;
}
#hello {
  position: relative;
  font-size: 10vh;
  text-align: center;
  color: white;
}