#musicToggle {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 100;

  padding: 8px 14px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 6px;

  background: rgba(0, 0, 0, 0.7);
  color: white;

  font-size: 14px;
  font-family: inherit;

  cursor: pointer;
  transition:
    background 0.2s,
    transform 0.1s;
}

#musicToggle:hover {
  background: rgba(0, 0, 0, 0.85);
}

#musicToggle:active {
  transform: scale(0.95);
}