/* Music control — available from the first screen. */
.music-toggle {
  position: fixed;
  z-index: 500;
  top: max(1rem, env(safe-area-inset-top));
  right: max(1rem, env(safe-area-inset-right));
  left: auto;
  display: grid;
  grid-template-columns: auto auto;
  align-items: center;
  justify-content: center;
  gap: 3px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid rgba(201,169,110,.72);
  border-radius: 50%;
  background: rgba(250,247,242,.9);
  color: var(--c-sage-dark);
  box-shadow: 0 5px 18px rgba(45,52,44,.16), inset 0 0 0 3px rgba(255,255,255,.45);
  cursor: pointer;
  opacity: 1;
  transform: none;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: opacity .45s ease, transform .45s ease, background .25s ease;
  -webkit-tap-highlight-color: transparent;
}

.music-toggle[hidden] { display: none; }

.music-toggle.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.music-toggle:focus-visible {
  outline: 2px solid var(--c-gold);
  outline-offset: 3px;
}

.music-toggle:active { transform: scale(.94); }

.music-note {
  font-family: Georgia, serif;
  font-size: 1.08rem;
  line-height: 1;
  transform: translateY(-1px);
}

.music-levels {
  display: flex;
  align-items: flex-end;
  gap: 1.5px;
  width: 9px;
  height: 14px;
}

.music-levels i {
  display: block;
  width: 2px;
  height: 35%;
  border-radius: 2px;
  background: var(--c-gold);
  transform-origin: bottom;
}

.music-toggle.is-playing .music-levels i {
  animation: music-level 1s ease-in-out infinite alternate;
}

.music-toggle.is-playing .music-levels i:nth-child(2) { animation-delay: -.45s; }
.music-toggle.is-playing .music-levels i:nth-child(3) { animation-delay: -.72s; }

.music-toggle:not(.is-playing) {
  background: rgba(240,237,230,.88);
}

.music-toggle:not(.is-playing) .music-levels i {
  height: 2px;
  opacity: .65;
}

@keyframes music-level {
  from { height: 24%; }
  to { height: 100%; }
}

@media (max-height: 620px) {
  .music-toggle {
    top: max(.65rem, env(safe-area-inset-top));
    right: max(.65rem, env(safe-area-inset-right));
    left: auto;
    width: 39px;
    height: 39px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .music-toggle,
  .music-levels i { transition: none; animation: none !important; }
}