* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #000;
}

#gl {
  display: block;
  width: 100vw;
  height: 100vh;
  cursor: grab;
  touch-action: none;
}

#gl:active {
  cursor: grabbing;
}

#fallback {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  color: #9aa;
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 14px;
  line-height: 1.6;
  text-align: center;
}

#hint {
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.35);
  color: rgba(255, 255, 255, 0.6);
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 12px;
  letter-spacing: 0.02em;
  white-space: nowrap;
  pointer-events: none;
  transition: opacity 0.6s ease;
}

#hint.hidden {
  opacity: 0;
}