.music-toggle-btn {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: #fff9f1;
  border: 1px solid #a9822f;
  color: #a9822f;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 500;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.12);
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.music-toggle-btn:hover {
  transform: scale(1.06);
}

.music-toggle-btn svg {
  width: 22px;
  height: 22px;
}

.music-toggle-btn .icon-muted {
  display: none;
}

.music-toggle-btn.paused .icon-playing {
  display: none;
}

.music-toggle-btn.paused .icon-muted {
  display: block;
}

/* Sutil pulso mientras suena, para que se note que está activo */
.music-toggle-btn:not(.paused) svg.icon-playing {
  animation: musicPulse 1.8s ease-in-out infinite;
}

@keyframes musicPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}