/**
 * kaelon-music-btn.css — Botón flotante de música ambiental
 * Creado: 18 junio 2026
 *
 * Posición: esquina inferior izquierda, espejo del botón WA.
 * Paleta: línea visual Final v2 (cálido / dorado / crema).
 * Sin tocar ningún diseño aprobado.
 */

/* ── Botón base ── */
.kaelon-music-btn {
  position: fixed;
  bottom: 1.5rem;
  left:   1.5rem;
  z-index: 999;
  width:  52px;
  height: 52px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid rgba(195, 155, 80, 0.42);
  background: rgba(52, 38, 22, 0.82);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  color: #e8d8b0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.25s, background-color 0.25s, transform 0.15s;
  box-shadow: 0 2px 14px rgba(0, 0, 0, 0.34);
  outline: none;
  -webkit-tap-highlight-color: transparent;
}

.kaelon-music-btn:hover {
  border-color: rgba(195, 155, 80, 0.82);
  background:   rgba(68, 50, 30, 0.92);
  transform: scale(1.07);
}

.kaelon-music-btn:focus-visible {
  outline: 2px solid rgba(195, 155, 80, 0.70);
  outline-offset: 3px;
}

/* ── Estado: preferencia guardada pero no sonando ── */
.kaelon-music-btn.pref-on {
  border-color: rgba(195, 155, 80, 0.60);
}

/* ── Estado: sonando ── */
.kaelon-music-btn.is-playing {
  border-color: rgba(195, 155, 80, 0.90);
  animation: kaelon-music-glow 2.8s ease-in-out infinite;
}

@keyframes kaelon-music-glow {
  0%,  100% { box-shadow: 0 2px 14px rgba(0, 0, 0, 0.34), 0 0 0 0   rgba(195, 155, 80, 0.00); }
  50%        { box-shadow: 0 2px 14px rgba(0, 0, 0, 0.34), 0 0 0 5px rgba(195, 155, 80, 0.14); }
}

/* ── Contenedor de iconos ── */
.kaelon-music-btn__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

/* Icono nota musical — visible cuando está parado */
.kaelon-music-btn__icon-note {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Ecualizador — visible cuando está sonando */
.kaelon-music-btn__icon-eq {
  display: none;
  align-items: flex-end;
  gap: 3px;
  height: 20px;
}

.kaelon-music-btn.is-playing .kaelon-music-btn__icon-note { display: none; }
.kaelon-music-btn.is-playing .kaelon-music-btn__icon-eq   { display: flex; }

/* ── Barras del ecualizador ── */
.kaelon-music-btn__bar {
  width: 3px;
  background: #e8d8b0;
  border-radius: 2px;
  transform-origin: bottom center;
  animation: kaelon-eq 1s ease-in-out infinite;
}

.kaelon-music-btn__bar:nth-child(1) { height: 8px;  animation-delay: 0.00s; }
.kaelon-music-btn__bar:nth-child(2) { height: 14px; animation-delay: 0.22s; }
.kaelon-music-btn__bar:nth-child(3) { height: 10px; animation-delay: 0.11s; }
.kaelon-music-btn__bar:nth-child(4) { height: 16px; animation-delay: 0.33s; }

@keyframes kaelon-eq {
  0%,  100% { transform: scaleY(0.35); opacity: 0.70; }
  50%        { transform: scaleY(1.00); opacity: 1.00; }
}

/* ── Reducción de movimiento ── */
@media (prefers-reduced-motion: reduce) {
  .kaelon-music-btn,
  .kaelon-music-btn.is-playing,
  .kaelon-music-btn__bar {
    animation: none;
  }
  .kaelon-music-btn__bar {
    transform: scaleY(0.75);
  }
}