* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: #050505;
  font-family: Arial, Helvetica, sans-serif;
}

a-scene {
  position: fixed;
  inset: 0;
}

.hud {
  position: fixed;
  top: max(12px, env(safe-area-inset-top));
  left: 50%;
  z-index: 20;
  min-width: 34px;
  height: 28px;
  padding: 0 10px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.34);
  color: rgba(255, 255, 255, 0.78);
  font-size: 13px;
  font-weight: 700;
  line-height: 1;
  transform: translateX(-50%);
  pointer-events: none;
}

.start-panel {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: grid;
  place-items: center;
  background: rgba(0, 0, 0, 0.52);
}

.start-panel.hidden {
  display: none;
}

button {
  height: 46px;
  padding: 0 22px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  color: #101010;
  font: 700 15px/1 Arial, Helvetica, sans-serif;
}

.a-enter-vr {
  right: max(12px, env(safe-area-inset-right));
  bottom: max(12px, env(safe-area-inset-bottom));
}

body.is-vr .hud {
  display: none;
}