/* ════════════════════════════════════════════════════════════════
   PANEL DE FAVORITOS - Dark Premium Design
   ════════════════════════════════════════════════════════════════ */

.favorites-btn {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.6rem 0.9rem;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s;
  font-size: 0.85rem;
}

.favorites-btn:hover {
  background: var(--panel2);
  border-color: var(--teal);
  transform: translateY(-1px);
}

.favorites-btn svg {
  flex-shrink: 0;
}

.fav-count {
  background: var(--teal);
  color: #0a0a0a;
  padding: 0.15rem 0.5rem;
  border-radius: 12px;
  font-size: 0.7rem;
  font-weight: 700;
  font-family: 'DM Mono', monospace;
  letter-spacing: 0.5px;
}

/* Panel lateral */
.favorites-panel {
  position: fixed;
  top: 0;
  right: -420px;
  width: 100%;
  max-width: 420px;
  height: 100vh;
  background: var(--bg);
  border-left: 1px solid var(--border);
  z-index: 10000;
  display: flex;
  flex-direction: column;
  transition: right 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: -8px 0 40px rgba(0, 0, 0, 0.5);
}

.favorites-panel.open {
  right: 0;
}

/* Overlay oscuro */
.favorites-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.favorites-overlay.active {
  opacity: 1;
  pointer-events: all;
}

/* Header del panel */
.fav-panel-header {
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.fav-panel-title {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.fav-panel-title h2 {
  font-family: 'Syne', sans-serif;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
  margin: 0;
}

.fav-panel-title svg {
  color: var(--gold);
  flex-shrink: 0;
}

.fav-panel-close {
  background: var(--panel2);
  border: 1px solid var(--border);
  color: var(--muted);
  width: 36px;
  height: 36px;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: all 0.2s;
}

.fav-panel-close:hover {
  background: rgba(255, 71, 87, 0.1);
  border-color: var(--accent);
  color: var(--accent);
}

/* Body con scroll */
.fav-panel-body {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
}

/* Secciones de favoritos */
.fav-section {
  margin-bottom: 2rem;
}

.fav-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--border);
}

.fav-section-title {
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 2px;
  color: var(--teal);
  font-weight: 700;
}

.fav-section-count {
  font-family: 'DM Mono', monospace;
  font-size: 0.65rem;
  color: var(--muted);
  background: var(--panel2);
  padding: 0.2rem 0.6rem;
  border-radius: 10px;
}

/* Empty state */
.fav-empty {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.6;
}

.fav-empty-icon {
  font-size: 2.5rem;
  opacity: 0.3;
  margin-bottom: 0.8rem;
}

/* Cards de acordes */
.fav-chord-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 0.8rem;
}

.fav-chord-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.8rem;
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
}

.fav-chord-card:hover {
  background: var(--panel2);
  border-color: var(--teal);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 229, 204, 0.2);
}

.fav-chord-name {
  font-family: 'Syne', sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  text-align: center;
  margin-bottom: 0.5rem;
}

.fav-chord-svg {
  width: 100%;
  height: auto;
  opacity: 0.8;
}

.fav-chord-remove {
  position: absolute;
  top: 0.3rem;
  right: 0.3rem;
  background: rgba(0, 0, 0, 0.7);
  border: none;
  color: var(--accent);
  width: 22px;
  height: 22px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.7rem;
  opacity: 0;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.fav-chord-card:hover .fav-chord-remove {
  opacity: 1;
}

.fav-chord-remove:hover {
  background: var(--accent);
  color: #fff;
}

/* Lista de escalas/progresiones */
.fav-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.fav-list-item {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.9rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  transition: all 0.2s;
}

.fav-list-item:hover {
  background: var(--panel2);
  border-color: var(--teal);
}

.fav-item-icon {
  font-size: 1.2rem;
  flex-shrink: 0;
}

.fav-item-content {
  flex: 1;
  min-width: 0;
}

.fav-item-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.2rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.fav-item-meta {
  font-size: 0.7rem;
  color: var(--muted);
  font-family: 'DM Mono', monospace;
}

.fav-item-actions {
  display: flex;
  gap: 0.4rem;
  flex-shrink: 0;
}

.fav-item-btn {
  background: var(--teal);
  color: #0a0a0a;
  border: none;
  padding: 0.4rem 0.8rem;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}

.fav-item-btn:hover {
  background: var(--gold);
  transform: translateY(-1px);
}

.fav-item-btn-remove {
  background: transparent;
  border: 1px solid rgba(255, 71, 87, 0.3);
  color: var(--accent);
  padding: 0.4rem 0.6rem;
}

.fav-item-btn-remove:hover {
  background: rgba(255, 71, 87, 0.1);
  border-color: var(--accent);
}

/* Mobile responsive */
@media (max-width: 768px) {
  .favorites-panel {
    max-width: 100%;
    right: -100%;
  }
  
  .fav-panel-header {
    padding: 1.2rem 1rem;
  }
  
  .fav-panel-title h2 {
    font-size: 1.2rem;
  }
  
  .fav-panel-body {
    padding: 1rem;
  }
  
  .fav-chord-grid {
    grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
  }
}

/* Animación de entrada */
@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.fav-chord-card,
.fav-list-item {
  animation: fadeInScale 0.3s ease-out;
}