/* Background music toggle — shared across pages */
.bgm-toggle{
  position:fixed;bottom:24px;right:24px;z-index:9999;
  width:48px;height:48px;border-radius:50%;
  background:rgba(20,15,10,.78);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  border:1px solid rgba(255,255,255,.12);
  color:#f5e9c8;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  transition:transform .25s ease,background .25s ease,opacity .25s ease;
  opacity:0;pointer-events:none;
}
.bgm-toggle.ready{opacity:1;pointer-events:auto}
.bgm-toggle:hover{transform:scale(1.08);background:rgba(40,25,12,.88)}
.bgm-toggle:focus-visible{outline:2px solid #f5e9c8;outline-offset:3px}
.bgm-toggle svg{width:22px;height:22px}
.bgm-toggle .icon-off{display:none}
.bgm-toggle[data-playing="false"] .icon-on{display:none}
.bgm-toggle[data-playing="false"] .icon-off{display:block}
@media (max-width:600px){
  .bgm-toggle{bottom:16px;right:16px;width:44px;height:44px}
}