/* ═══════════════════════════════════════════════════════════
   Cancionero de Aula — Estilos Específicos Premium
   ══════════════════════════════════════════════════════════ */

.cancionero-hub {
  padding: 4rem 5%;
  max-width: 1200px;
  margin: 0 auto;
}

.cancionero-hub .hub-header h1 {
  font-size: 3rem;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
  text-align: center;
}

.cancionero-hub .hub-header > p {
  color: var(--color-text-light);
  font-size: 1.15rem;
  max-width: 720px;
  margin: 0 auto 3rem;
  text-align: center;
  line-height: 1.7;
}

/* Panel de Controles (Buscador y Categorías) */
.cancionero-controls {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  background: var(--color-surface);
  padding: 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  margin-bottom: 3rem;
  border: 1px solid rgba(226, 232, 240, 0.8);
}

/* Buscador Estilizado */
.search-box {
  position: relative;
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
}

.search-box input {
  width: 100%;
  padding: 1rem 3rem 1rem 1.5rem;
  border: 2px solid #e2e8f0;
  border-radius: var(--radius-pill);
  font-family: inherit;
  font-size: 1.05rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
  background-color: var(--color-background);
}

.search-box input:focus {
  outline: none;
  border-color: var(--color-primary);
  background-color: var(--color-surface);
  box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.15), var(--shadow-sm);
}

.clear-btn {
  position: absolute;
  right: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-text-light);
  cursor: pointer;
  padding: 0.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s;
}

.clear-btn:hover {
  color: var(--color-primary);
}

/* Pestañas de Categoría (Pills) */
.category-filters {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.filter-tab {
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-pill);
  border: 1px solid #cbd5e1;
  background: var(--color-surface);
  color: var(--color-text-light);
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.filter-tab:hover {
  background-color: var(--color-background);
  color: var(--color-primary);
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

.filter-tab.active {
  background-color: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
  box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
}

/* Meta información de resultados */
.canciones-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding: 0 0.5rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.canciones-count {
  font-weight: 800;
  color: var(--color-text);
  font-size: 1.05rem;
}

.canciones-hint {
  font-size: 0.85rem;
  color: var(--color-text-light);
  font-weight: 500;
}

/* Grilla de Canciones */
.canciones-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
}

/* Tarjeta de Canción (Premium) */
.cancion-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  border-left: 5px solid var(--color-primary);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
  position: relative;
  border: 1px solid rgba(226, 232, 240, 0.5);
  border-left-width: 5px;
}

.cancion-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

/* Bordes de color dinámicos según categoría */
.cancion-card.cat-infantil { border-left-color: #7c3aed; } /* Violeta */
.cancion-card.cat-folclore { border-left-color: #b45309; } /* Bronce/Naranja cálido */
.cancion-card.cat-rock { border-left-color: #e11d48; }     /* Rojo Rock */
.cancion-card.cat-patria { border-left-color: #0ea5e9; }   /* Celeste */

.cancion-card-header {
  padding: 1.5rem 1.5rem 1rem;
}

.cancion-title-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.cancion-titulo {
  font-size: 1.35rem;
  color: var(--color-text);
  font-weight: 800;
  line-height: 1.25;
}

.cancion-artista {
  font-size: 0.95rem;
  color: var(--color-text-light);
  font-weight: 600;
  margin-bottom: 0.75rem;
}

/* Badges */
.cancion-badges {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.badge {
  font-size: 0.72rem;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-pill);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-cat-infantil { background-color: #f5f3ff; color: #7c3aed; }
.badge-cat-folclore { background-color: #fffbeb; color: #b45309; }
.badge-cat-rock { background-color: #fff1f2; color: #e11d48; }
.badge-cat-patria { background-color: #f0f9ff; color: #0ea5e9; }

.badge-status {
  background-color: #f1f5f9;
  color: #64748b;
  border: 1px dashed #cbd5e1;
}

/* Cuerpo de la Tarjeta */
.cancion-card-body {
  padding: 0 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  flex: 1;
}

.cancion-resena {
  color: var(--color-text-light);
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 0;
  padding: 0.75rem 1rem;
  background: var(--color-background);
  border-radius: var(--radius-md);
  border-left: 2px solid #e2e8f0;
}

/* Contenedor del reproductor de Spotify */
.spotify-embed-container {
  border-radius: 12px;
  overflow: hidden;
  background-color: #000;
  height: 80px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s;
}

.spotify-embed-container:focus-within {
  box-shadow: 0 0 0 3px rgba(30, 215, 96, 0.3); /* Brillo verde Spotify */
}

/* Botones de Descarga en el Footer de la Tarjeta */
.cancion-card-footer {
  padding: 1.25rem 1.5rem 1.5rem;
  border-top: 1px solid #f1f5f9;
  background: #fafafa;
  display: flex;
  gap: 0.75rem;
}

/* Botón de Descarga Estilo Ficha */
.download-action-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem;
  border-radius: var(--radius-md);
  background: white;
  border: 1px solid #e2e8f0;
  color: var(--color-text);
  font-weight: 600;
  font-size: 0.85rem;
  text-decoration: none;
  transition: all 0.25s ease;
  box-shadow: 0 2px 4px rgba(0,0,0,0.02);
}

.download-action-btn:hover {
  border-color: var(--color-primary);
  background: #fdfdfd;
  color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.download-action-btn svg {
  width: 16px;
  height: 16px;
  transition: transform 0.2s ease;
}

.download-action-btn:hover svg {
  transform: translateY(1px);
}

/* Botón de MP3 Especial para Patrias */
.download-action-btn.btn-mp3 {
  background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
  color: white;
  border: none;
  box-shadow: 0 3px 6px rgba(14, 165, 233, 0.3);
}

.download-action-btn.btn-mp3:hover {
  background: linear-gradient(135deg, #38bdf8 0%, #0ea5e9 100%);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 5px 12px rgba(14, 165, 233, 0.4);
}

.download-action-btn.disabled {
  opacity: 0.65;
  background: #f1f5f9;
  color: #94a3b8;
  border-color: #e2e8f0;
  cursor: not-allowed;
  pointer-events: none;
}

/* Estado Vacío de Búsqueda */
.canciones-empty {
  text-align: center;
  padding: 4rem 2rem;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(226, 232, 240, 0.6);
  max-width: 600px;
  margin: 2rem auto;
}

.canciones-empty-icon {
  font-size: 4.5rem;
  margin-bottom: 1rem;
  animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
  0% { transform: scale(1); opacity: 0.8; }
  50% { transform: scale(1.05); opacity: 1; }
  100% { transform: scale(1); opacity: 0.8; }
}

.canciones-empty h2 {
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.canciones-empty p {
  color: var(--color-text-light);
}

/* Adaptabilidad (Responsive) */
@media (max-width: 768px) {
  .cancionero-hub .hub-header h1 {
    font-size: 2.25rem;
  }

  .cancionero-controls {
    padding: 1.5rem;
    gap: 1.5rem;
  }

  .filter-tab {
    padding: 0.6rem 1.2rem;
    font-size: 0.88rem;
  }
}

@media (max-width: 480px) {
  .cancion-card-footer {
    flex-direction: column;
    gap: 0.5rem;
  }

  .download-action-btn {
    width: 100%;
  }
}