/* Shared genre BGM mute control */
#sap-bgm-toggle {
  position: fixed;
  right: 12px;
  bottom: 12px;
  z-index: 9998;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(8, 8, 10, 0.72);
  color: #f0e8d0;
  font: 600 11px/1 "Segoe UI", system-ui, sans-serif;
  letter-spacing: 0.04em;
  cursor: pointer;
  backdrop-filter: blur(6px);
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.35);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  user-select: none;
}

#sap-bgm-toggle:hover {
  border-color: rgba(240, 216, 128, 0.55);
  color: #fff8d0;
}

#sap-bgm-toggle.is-muted {
  opacity: 0.55;
  font-size: 9px;
  letter-spacing: 0.02em;
}

#sap-bgm-toggle:focus-visible {
  outline: 2px solid #e8c547;
  outline-offset: 2px;
}

@media (max-width: 520px) {
  #sap-bgm-toggle {
    right: 8px;
    bottom: 8px;
    width: 40px;
    height: 40px;
    font-size: 10px;
  }
}