html,
body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: #000;
}
#scene {
  position: relative;
  width: 100vw;
  height: 100vh;
}
#bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  animation: zoom 20s alternate infinite linear;
}
@keyframes zoom {
  from {
    transform: scale(1);
  }
  to {
    transform: scale(1.08);
  }
}
#lyrics {
  position: absolute;
  left: 50%;
  top: 55%;
  transform: translate(-50%, -50%);
  width: 90%;
  text-align: center;
  color: #fff;
  font: bold clamp(28px, 5vw, 64px) Arial;
  text-shadow:
    0 0 10px #000,
    0 0 20px gold;
}
#langBtn {
  position: absolute;
  top: 20px;
  right: 20px;
  z-index: 5;
}
#ending {
  position: absolute;
  inset: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #000;
  opacity: 0;
  transition: 2s;
}
#logo {
  max-width: 70%;
}
audio {
  position: absolute;
  bottom: 10px;
  left: 10px;
  z-index: 5;
}

/* ===== STAGE NAVIGATION ===== */

.extra-buttons {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 15px;
  z-index: 9999;
}

.extra-btn {
  padding: 12px 24px;
  border-radius: 30px;
  text-decoration: none;
  font-weight: bold;
  color: #000;
  background: linear-gradient(90deg, #00bfff, #00ff99);
  box-shadow: 0 0 12px rgba(0, 255, 255, 0.5);
}

.extra-btn.stage2 {
  background: linear-gradient(90deg, #ffd700, #ff9f1a);
}