html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background-color: #f5f0e8;
  overflow: hidden;
  overscroll-behavior: none;
  touch-action: none;
  -webkit-tap-highlight-color: transparent;
}
#game { width: 100%; height: 100%; }
#boot-preloader {
  position: fixed; inset: 0; z-index: 9999;
  display: flex; align-items: center; justify-content: center;
  background: #f5f0e8;
  transition: opacity .35s ease;
}
#boot-preloader.hide { opacity: 0; pointer-events: none; }
#boot-preloader .boot-spinner {
  width: 48px; height: 48px; border-radius: 50%;
  border: 4px solid rgba(0,0,0,.12); border-top-color: #333;
  animation: boot-spin .9s linear infinite;
}
@keyframes boot-spin { to { transform: rotate(360deg); } }