html, body {
  height: 100%;
  margin: 0;
}
#app {
  position: fixed;
  inset: 0;
  background: #0e0e10;
}
#hud {
  position: fixed;
  top: 12px;
  left: 12px;
  color: #e8e8ea;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  font-size: 13px;
  line-height: 1.35;
  background: rgba(0,0,0,0.35);
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 8px;
  padding: 10px 12px;
  pointer-events: none;
}
#hud #hint {
  margin-top: 6px;
  opacity: 0.8;
}

#loading {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  padding: 10px 14px;
  background: rgba(0,0,0,0.6);
  border: 1px solid rgba(255,255,255,0.15);
  color: #e8e8ea;
  border-radius: 8px;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  font-size: 13px;
  display: none;
}