/* ============================================================
   MAMA TAVA · Background music floating control
   ============================================================ */
.bg-music-toggle {
  position: fixed;
  left: 22px;
  bottom: 22px;
  z-index: 998;            /* below preloader (9999), above page */
  width: 54px;
  height: 54px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #344262 0%, #4a5d7d 100%);
  color: #ffffff;
  box-shadow:
    0 8px 24px rgba(8, 15, 26, 0.28),
    0 0 0 2px rgba(131, 193, 198, 0.0);
  transition:
    transform 0.28s cubic-bezier(.22, 1, .36, 1),
    box-shadow 0.28s ease,
    background 0.28s ease;
  -webkit-tap-highlight-color: transparent;
}

.bg-music-toggle:hover {
  transform: translateY(-3px) scale(1.04);
  background: linear-gradient(135deg, #344262 0%, #83C1C6 100%);
  box-shadow:
    0 12px 32px rgba(8, 15, 26, 0.36),
    0 0 0 2px rgba(131, 193, 198, 0.4);
}

.bg-music-toggle:active {
  transform: translateY(0) scale(0.98);
}

.bg-music-toggle__icon {
  width: 22px;
  height: 22px;
  display: block;
  transition: opacity 0.18s ease, transform 0.18s ease;
}

/* Show play icon by default; pause icon when playing */
.bg-music-toggle__icon--pause { display: none; }
.bg-music-toggle.is-playing .bg-music-toggle__icon--play { display: none; }
.bg-music-toggle.is-playing .bg-music-toggle__icon--pause { display: block; }

/* Pulsing ring when playing */
.bg-music-toggle__pulse {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  pointer-events: none;
  border: 2px solid rgba(131, 193, 198, 0.6);
  opacity: 0;
}
.bg-music-toggle.is-playing .bg-music-toggle__pulse {
  animation: bgMusicPulse 1.8s ease-out infinite;
}
@keyframes bgMusicPulse {
  0%   { transform: scale(1);    opacity: 0.7; }
  100% { transform: scale(1.6);  opacity: 0;   }
}

/* "Activar música" hint bubble — shown until user activates */
.bg-music-toggle__hint {
  position: absolute;
  left: calc(100% + 12px);
  top: 50%;
  transform: translateY(-50%) translateX(-6px);
  background: #344262;
  color: #fff;
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 8px 14px;
  border-radius: 999px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  box-shadow: 0 6px 18px rgba(8, 15, 26, 0.22);
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.bg-music-toggle__hint::before {
  content: '';
  position: absolute;
  left: -5px;
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
  width: 10px;
  height: 10px;
  background: #344262;
}
.bg-music-toggle.needs-activation .bg-music-toggle__hint {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
  animation: bgMusicHintBob 2.4s ease-in-out infinite;
}
@keyframes bgMusicHintBob {
  0%, 100% { transform: translateY(-50%) translateX(0); }
  50%      { transform: translateY(-50%) translateX(4px); }
}

/* Once activated, hide the hint */
.bg-music-toggle.is-playing .bg-music-toggle__hint,
.bg-music-toggle:not(.needs-activation) .bg-music-toggle__hint {
  opacity: 0;
}

/* Mobile: keep clear of bottom thumb area & smaller */
@media (max-width: 640px) {
  .bg-music-toggle {
    left: 14px;
    bottom: 14px;
    width: 46px;
    height: 46px;
  }
  .bg-music-toggle__icon { width: 18px; height: 18px; }
  .bg-music-toggle__hint { font-size: 0.72rem; padding: 6px 11px; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .bg-music-toggle,
  .bg-music-toggle__hint,
  .bg-music-toggle__pulse {
    animation: none !important;
    transition: none !important;
  }
}