/* ===== Interaction prompt ===== */
#interact-prompt {
  position: absolute;
  bottom: 18%;
  left: 50%; transform: translateX(-50%);
  background: rgba(0,30,20,0.8);
  border: 1px solid #44ffaa;
  color: #44ffaa;
  padding: 8px 18px;
  font-family: 'Orbitron', sans-serif;
  font-size: 11px;
  letter-spacing: 0.3em;
  z-index: 40;
  display: none;
  box-shadow: 0 0 16px rgba(68,255,170,0.3);
  text-shadow: 0 0 6px currentColor;
  animation: float 1.6s ease-in-out infinite;
}
@keyframes float {
  0%,100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(-6px); }
}

/* ===== Mobile controls ===== */
#mobile-controls {
  position: absolute;
  bottom: 24px; left: 0; right: 0;
  display: none;
  justify-content: space-between;
  padding: 0 28px;
  z-index: 45;
  pointer-events: none;
}
.touch-pad {
  pointer-events: auto;
  width: 130px; height: 130px;
  border-radius: 50%;
  background: rgba(0,30,20,0.4);
  border: 1px solid rgba(68,255,170,0.3);
  position: relative;
  backdrop-filter: blur(3px);
  touch-action: none;
}
.touch-stick {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%,-50%);
  width: 50px; height: 50px;
  border-radius: 50%;
  background: rgba(68,255,170,0.4);
  border: 1px solid #44ffaa;
  pointer-events: none;
  transition: background 0.1s;
}
.touch-action {
  pointer-events: auto;
  width: 90px; height: 90px;
  border-radius: 50%;
  background: rgba(255,170,68,0.2);
  border: 1px solid #ffaa44;
  color: #ffaa44;
  font-family: 'Orbitron', sans-serif;
  font-size: 11px;
  letter-spacing: 0.15em;
  align-self: flex-end;
  display: flex; align-items: center; justify-content: center;
}