yuno/html/styles.css

body,
html {
  height: 100%;
}

body {
  background-color: lightgray;
  margin: 0;
  display: flex;
  justify-content: center;
  align-items: center;
}

.game-container {
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.lds-dual-ring {
  display: inline-block;
  position: absolute;
  left: 0;
  right: 0;
  margin: auto;
  width: 80px;
  height: 80px;
}

.lds-dual-ring:after {
  content: " ";
  display: block;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  border: 6px solid #fff;
  border-color: #fff transparent #fff transparent;
  animation: lds-dual-ring 1.2s linear infinite;
}

@keyframes lds-dual-ring {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

#bevy {
  z-index: 2;
}