html, body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  background: #000;
  font-family: Arial, Helvetica, sans-serif;
}

a-scene {
  width: 100vw;
  height: 100vh;
}

#ui {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 360px;
}

button {
  padding: 12px 14px;
  border: 0;
  border-radius: 10px;
  background: white;
  color: #111;
  font-weight: bold;
  font-size: 15px;
}

button:disabled {
  opacity: 0.45;
}

#status, #targetStatus, #gestureStatus {
  padding: 8px 10px;
  border-radius: 8px;
  background: rgba(0,0,0,0.72);
  color: white;
  font-size: 13px;
  line-height: 1.35;
}

#handCanvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 40;
  pointer-events: none;
}

#splitCanvas {
  display: none;
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 8000;
  background: #000;
}

body.split-mode #splitCanvas {
  display: block;
}

body.split-mode #handCanvas {
  display: none;
}

body.split-mode #ui {
  display: none;
}