/* ==========================================================================
   Estilos de Visualizadores Multi-Instrumento (Piano & Drum Kit)
   ========================================================================== */
#piano-container, #drums-container {
  display: none;
  background-color: rgba(14, 14, 18, 0.95);
  border-top: 1px solid var(--border-subtle);
  backdrop-filter: var(--glass-blur);
}

#piano-container.visualizer-open,
#drums-container.visualizer-open {
  display: block;
}

/* Visualizador de Piano */
.piano-visualizer-wrapper {
  display: flex;
  flex-direction: column;
  padding: 10px 16px;
  gap: 8px;
}

.piano-header, .drum-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.piano-title, .drum-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
}

.btn-close-visualizer {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.9rem;
}

.btn-close-visualizer:hover {
  color: var(--text-primary);
}

.piano-keyboard-scroll {
  overflow-x: auto;
  padding-bottom: 4px;
}

.piano-keyboard-track {
  display: flex;
  position: relative;
  height: 110px;
  user-select: none;
}

.piano-key {
  cursor: pointer;
  position: relative;
  transition: background-color 0.08s, box-shadow 0.08s;
  box-sizing: border-box;
}

.white-key {
  width: 28px;
  height: 100%;
  background: #ffffff;
  border: 1px solid #222;
  border-bottom-left-radius: 4px;
  border-bottom-right-radius: 4px;
  z-index: 1;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 4px;
}

.white-key .piano-note-label {
  font-size: 0.65rem;
  font-weight: 700;
  color: #555;
}

.white-key.key-active {
  background: var(--accent-primary) !important;
  box-shadow: 0 0 14px var(--accent-primary-glow);
}

.white-key.key-active .piano-note-label {
  color: var(--text-primary);
}

.black-key {
  width: 18px;
  height: 62%;
  background: #181820;
  border: 1px solid #000;
  border-bottom-left-radius: 3px;
  border-bottom-right-radius: 3px;
  margin-left: -9px;
  margin-right: -9px;
  z-index: 2;
}

.black-key.key-active {
  background: #00e5ff !important;
  box-shadow: 0 0 14px rgba(0, 229, 255, 0.8);
}

/* Visualizador de Batería (Drum Kit) */
.drum-visualizer-wrapper {
  display: flex;
  flex-direction: column;
  padding: 10px 16px;
  gap: 10px;
}

.drum-kit-layout {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.drum-cymbals-row, .drum-toms-row, .drum-kick-row {
  display: flex;
  justify-content: center;
  gap: 12px;
}

.drum-pad {
  background: rgba(25, 25, 35, 0.85);
  border: 1px solid var(--border-strong);
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.08s ease-out;
  user-select: none;
}

.cymbal-pad {
  width: 70px;
  height: 45px;
  border-radius: 50%;
  border-color: #ffd54f;
  background: radial-gradient(circle, rgba(255, 213, 79, 0.2) 0%, rgba(20, 20, 28, 0.8) 80%);
}

.tom-pad {
  width: 65px;
  height: 65px;
  border-radius: 50%;
  border-color: #42a5f5;
  background: radial-gradient(circle, rgba(66, 165, 245, 0.2) 0%, rgba(20, 20, 28, 0.8) 80%);
}

.snare-pad {
  width: 75px;
  height: 75px;
  border-radius: 50%;
  border-color: #ef5350;
  background: radial-gradient(circle, rgba(239, 83, 80, 0.25) 0%, rgba(20, 20, 28, 0.8) 80%);
}

.kick-pad {
  width: 120px;
  height: 60px;
  border-radius: 12px;
  border-color: var(--accent-primary);
  background: radial-gradient(circle, rgba(255, 87, 34, 0.3) 0%, rgba(20, 20, 28, 0.8) 80%);
}

.drum-pad.pad-hit {
  transform: scale(1.12);
  background: #ffffff !important;
  color: #000 !important;
  box-shadow: 0 0 20px #ffffff;
}