/* ===== MUSICA DE FUNDO (botao flutuante) ===== */
.music-fab {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 1040;
  display: flex;
  align-items: center;
  gap: 8px;
  pointer-events: none;
}
.music-fab > * { pointer-events: auto; }

.music-fab-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: none;
  background: var(--color-primary);
  color: #fff;
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 20px rgba(0, 0, 0, .18);
  cursor: pointer;
  transition: transform .15s, background .15s;
}
.music-fab-btn:hover { background: var(--color-accent); transform: scale(1.06); }
.music-fab-btn:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 3px; }

.music-fab.is-inviting .music-fab-btn { animation: music-pulse 1.8s ease-in-out infinite; }
@keyframes music-pulse {
  0%, 100% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--color-primary) 55%, transparent), 0 6px 20px rgba(0, 0, 0, .18); }
  50% { box-shadow: 0 0 0 12px color-mix(in srgb, var(--color-primary) 0%, transparent), 0 6px 20px rgba(0, 0, 0, .18); }
}

.music-fab-next,
.music-fab-label { display: none; }

.music-fab.is-playing .music-fab-next {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: #fff;
  color: var(--color-accent);
  box-shadow: 0 4px 14px rgba(0, 0, 0, .14);
  cursor: pointer;
}

.music-fab.is-playing .music-fab-label {
  display: block;
  max-width: min(260px, 52vw);
  padding: 7px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .95);
  color: #444;
  font-size: .78rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  box-shadow: 0 4px 14px rgba(0, 0, 0, .12);
}

@media (prefers-reduced-motion: reduce) {
  .music-fab.is-inviting .music-fab-btn { animation: none; }
}