#music-sync-control {
  position: fixed;
  z-index: 50;
  top: 1rem;
  right: 1rem;
}

#music-sync-control button {
  border: 0;
  border-radius: 0.65rem;
  background: #16a34a;
  color: white;
  cursor: pointer;
  font-weight: 700;
  padding: 0.6rem 0.9rem;
  box-shadow: 0 8px 22px rgb(0 0 0 / 24%);
}

#music-sync-control button:hover { background: #15803d; }
#music-sync-control button:disabled { cursor: wait; opacity: 0.75; }