#bmp-toggle-button {
  position: fixed;
  cursor: pointer;
  z-index: 9999;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
}

.equalizer {
  display: flex;
  gap: 3px;
  align-items: flex-end;
}

.equalizer span {
  width: 3px;
  height: 100%;
  background: var(--eq-color, #000);
  transform-origin: bottom;
}

.equalizer.playing span {
  animation: equalize 1s infinite ease-in-out;
}

.equalizer.playing span:nth-child(2) {
  animation-delay: 0.2s;
}
.equalizer.playing span:nth-child(3) {
  animation-delay: 0.4s;
}

.equalizer.muted span {
  animation: none !important;
  height: 50% !important;
  opacity: 0.8;
}

@keyframes equalize {
  0%, 100% { transform: scaleY(1); }
  50% { transform: scaleY(2.5); }
}