/**
 * FoZ SoundPro — Studio Design System & Visual Styles
 * ====================================================
 * Estética profesional de estación de producción musical digital (DAW).
 * Tema oscuro de alto contraste con acentos de neón (Cian, Magenta, Ámbar),
 * efectos de cristal (glassmorphism) y controles táctiles responsivos.
 */

:root {
  --bg-deep: #07090e;
  --bg-surface: #0f121a;
  --bg-card: #151a24;
  --bg-card-hover: #1c2230;
  --bg-card-active: #222a3b;

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(0, 242, 254, 0.5);

  --text-main: #f0f4fc;
  --text-muted: #8b9bb4;
  --text-dim: #5a667a;

  --neon-cyan: #00f2fe;
  --neon-cyan-glow: rgba(0, 242, 254, 0.35);
  --neon-magenta: #fe0369;          /* tono de marca del logo (logo.svg) */
  --neon-pink: #fe007a;
  --neon-pink-glow: rgba(254, 0, 122, 0.35);
  --neon-amber: #ffb800;
  --neon-green: #00e676;
  --neon-red: #ff334b;

  --step-inactive: #1a202c;
  --step-inactive-alt: #161c27;
  --step-active: #00f2fe;
  --step-cursor: rgba(255, 255, 255, 0.85);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-pill: 9999px;

  --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 16px var(--neon-cyan-glow);

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

/* Reset y caja base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body.studio-app {
  background-color: var(--bg-deep);
  color: var(--text-main);
  font-family: var(--font-family);
  font-size: 14px;
  line-height: 1.5;
  height: 100vh;
  height: 100dvh; /* móvil/tablet: respeta la barra dinámica del navegador */
  display: flex;
  flex-direction: column;
  overflow: hidden;
  user-select: none;
  -webkit-font-smoothing: antialiased;
}

/* ========================================================================= */
/* BARRA DE TRANSPORTE SUPERIOR (GLOBAL)                                     */
/* ========================================================================= */
.transport-bar {
  height: 64px;
  background: linear-gradient(180deg, #121622 0%, #0d1017 100%);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 100;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.transport-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 200px;
}

.brand-logo-img {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  display: block;
  box-shadow: 0 0 12px rgba(0, 242, 254, 0.28), 0 1px 4px rgba(0, 0, 0, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.07);
}

.brand-title {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.5px;
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-magenta));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-subtitle {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-magenta));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Grupo Central de Transporte */
.transport-controls {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-transport {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
}

.btn-transport.btn-primary {
  background: linear-gradient(135deg, #00f2fe, #4facfe);
  color: #07090e;
  box-shadow: 0 0 12px var(--neon-cyan-glow);
}

.btn-transport.btn-primary:hover {
  filter: brightness(1.15);
  transform: translateY(-1px);
}

.btn-transport.btn-primary.playing {
  background: linear-gradient(135deg, #00e676, #00b0ff);
  box-shadow: 0 0 18px rgba(0, 230, 118, 0.6);
  animation: pulse-glow 1.5s infinite;
}

.btn-transport.btn-secondary {
  background: var(--bg-card);
  color: var(--text-main);
  border-color: var(--border-subtle);
}

.btn-transport.btn-secondary:hover {
  background: var(--bg-card-hover);
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 12px rgba(0, 230, 118, 0.4); }
  50% { box-shadow: 0 0 20px rgba(0, 230, 118, 0.7); }
}

/* Control de BPM y Tempo */
.tempo-control-group,
.swing-control-group,
.volume-control-group {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.control-label {
  font-size: 10px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tempo-stepper {
  display: flex;
  align-items: center;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.tempo-stepper input {
  width: 50px;
  background: transparent;
  border: none;
  color: var(--neon-cyan);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  text-align: center;
  padding: 4px 0;
  outline: none;
}

.btn-step {
  background: transparent;
  border: none;
  color: var(--text-muted);
  width: 24px;
  font-weight: 800;
  cursor: pointer;
  transition: background 0.1s;
}

.btn-step:hover {
  background: var(--bg-card-hover);
  color: var(--text-main);
}

/* Sliders personalizados */
input[type="range"] {
  -webkit-appearance: none;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  height: 6px;
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--neon-cyan);
  box-shadow: 0 0 6px var(--neon-cyan);
  cursor: pointer;
}

/* Visualizador Master y Botones Rápidos */
.transport-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

#master-visualizer {
  background: #090c12;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
}

.export-quick-buttons {
  display: flex;
  gap: 8px;
}

.btn-action {
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 11px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.btn-accent-blue {
  background: rgba(0, 242, 254, 0.12);
  color: var(--neon-cyan);
  border-color: rgba(0, 242, 254, 0.3);
}

.btn-accent-blue:hover {
  background: rgba(0, 242, 254, 0.25);
  box-shadow: 0 0 8px var(--neon-cyan-glow);
}

.btn-accent-pink {
  background: rgba(254, 0, 122, 0.12);
  color: var(--neon-pink);
  border-color: rgba(254, 0, 122, 0.3);
}

.btn-accent-pink:hover {
  background: rgba(254, 0, 122, 0.25);
  box-shadow: 0 0 8px var(--neon-pink-glow);
}

/* ========================================================================= */
/* LAYOUT: SIDEBAR + MAIN WORKSPACE                                          */
/* ========================================================================= */
.studio-layout {
  display: flex;
  flex: 1;
  height: calc(100vh - 64px);
  overflow: hidden;
}

/* Sidebar */
.studio-sidebar {
  width: 220px;
  background: #0a0d14;
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 16px 10px;
}

.nav-menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.nav-button {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  position: relative;
}

.nav-button:hover {
  background: var(--bg-card);
  color: var(--text-main);
}

.nav-button.active {
  background: rgba(0, 242, 254, 0.1);
  color: var(--neon-cyan);
  border-color: rgba(0, 242, 254, 0.25);
}

.nav-icon {
  font-size: 16px;
}

.ai-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-left: auto;
}

.ai-status-dot.online {
  background: var(--neon-green);
  box-shadow: 0 0 6px var(--neon-green);
}

.ai-status-dot.offline {
  background: var(--text-dim);
}

/* Sidebar Footer Card */
.sidebar-status-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 11px;
}

.status-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.status-label {
  color: var(--text-muted);
}

.status-badge {
  padding: 2px 6px;
  border-radius: var(--radius-pill);
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
}

.badge-green { background: rgba(0, 230, 118, 0.15); color: var(--neon-green); }
.badge-gray { background: rgba(255, 255, 255, 0.1); color: var(--text-muted); }

/* ========================================================================= */
/* MAIN WORKSPACE                                                            */
/* ========================================================================= */
.studio-workspace {
  flex: 1;
  background: var(--bg-deep);
  overflow-y: auto;
  padding: 20px;
}

.studio-tab-panel {
  display: none;
}

.studio-tab-panel.active {
  display: block;
  animation: fadeIn 0.2s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(3px); }
  to { opacity: 1; transform: translateY(0); }
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.panel-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-main);
}

.panel-description {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ========================================================================= */
/* TAB 1: SECUENCIADOR GRID                                                  */
/* ========================================================================= */
.preset-quick-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.preset-bar-label {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 700;
  text-transform: uppercase;
}

.btn-preset-chip {
  padding: 5px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  color: var(--text-main);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-preset-chip:hover {
  background: var(--bg-card-hover);
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
}

.btn-preset-chip.btn-danger {
  color: var(--neon-red);
  border-color: rgba(255, 51, 75, 0.25);
}

.btn-preset-chip.btn-danger:hover {
  background: rgba(255, 51, 75, 0.15);
}

/* Regla superior de compases */
.sequencer-timeline-header {
  display: flex;
  align-items: center;
  margin-bottom: 6px;
  padding: 0 4px;
}

.track-header-spacer {
  width: 220px;
  font-size: 10px;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.steps-timeline {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(16, 1fr);
  gap: 4px;
}

.timeline-marker {
  font-size: 9px;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--text-dim);
  text-align: center;
}

.timeline-marker.beat-head {
  color: var(--neon-cyan);
}

/* Cuadrícula de pistas */
.sequencer-grid {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 12px;
  box-shadow: var(--shadow-card);
}

.track-row {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.015);
  border-radius: var(--radius-md);
  padding: 6px 8px;
  transition: background 0.1s;
}

.track-row:hover {
  background: rgba(255, 255, 255, 0.035);
}

/* Control de pista a la izquierda */
.track-controls {
  width: 260px;
  min-width: 240px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.track-name-btn {
  flex: 1;
  text-align: left;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  overflow: visible;
  text-overflow: clip;
  padding: 2px 4px;
  border-radius: var(--radius-sm);
}

.track-name-btn:hover {
  background: var(--bg-card);
  color: var(--neon-cyan);
}

.btn-mute,
.btn-solo {
  width: 22px;
  height: 22px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-dim);
  font-size: 10px;
  font-weight: 800;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.1s;
}

.btn-mute.active {
  background: var(--neon-red);
  color: #fff;
  border-color: var(--neon-red);
  box-shadow: 0 0 6px var(--neon-red);
}

.btn-solo.active {
  background: var(--neon-amber);
  color: #07090e;
  border-color: var(--neon-amber);
  box-shadow: 0 0 6px var(--neon-amber);
}

.track-vol-slider {
  width: 50px;
}

/* Botones de Pasos (16) */
.track-steps {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(16, 1fr);
  gap: 4px;
}

.step-btn {
  aspect-ratio: 1 / 1;
  min-height: 38px;
  background: var(--step-inactive);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: transform 0.05s ease, background 0.1s ease;
  position: relative;
}

/* Agrupación visual por compases (4 beats de 4 pasos) */
.step-btn.group-alt {
  background: var(--step-inactive-alt);
}

.step-btn:hover {
  filter: brightness(1.3);
  transform: scale(1.05);
}

.step-btn.active {
  background: linear-gradient(135deg, var(--neon-cyan), #00b0ff);
  border-color: #00f2fe;
  box-shadow: 0 0 10px var(--neon-cyan-glow);
}

.step-btn.cursor {
  outline: 2px solid var(--step-cursor);
  outline-offset: -1px;
}

.step-btn.active.cursor {
  filter: brightness(1.4);
  box-shadow: 0 0 16px rgba(0, 242, 254, 0.9);
}

/* Footer del Secuenciador */
.sequencer-footer-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 16px;
  padding: 10px 16px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  font-size: 11px;
  color: var(--text-muted);
}

.footer-separator {
  margin: 0 6px;
  color: var(--border-subtle);
}

.footer-actions {
  display: flex;
  gap: 10px;
}

/* ========================================================================= */
/* TAB 2: GRABADOR VOCAL                                                     */
/* ========================================================================= */
.vocal-studio-container {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 800px;
}

.vocal-visualizer-card {
  background: #090c12;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: var(--shadow-card);
}

#vocal-canvas {
  width: 100%;
  height: 180px;
  border-radius: var(--radius-md);
}

.recording-timer {
  position: absolute;
  top: 16px;
  right: 20px;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--neon-pink);
  text-shadow: 0 0 10px var(--neon-pink-glow);
}

.vocal-controls-card {
  display: flex;
  justify-content: center;
  gap: 16px;
}

.btn-record-main {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 28px;
  background: linear-gradient(135deg, #ff1744, #d50000);
  border: none;
  border-radius: var(--radius-pill);
  color: #fff;
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 0 16px rgba(255, 23, 68, 0.4);
  transition: all 0.2s ease;
}

.btn-record-main:hover {
  transform: scale(1.03);
  box-shadow: 0 0 24px rgba(255, 23, 68, 0.7);
}

.btn-record-main.recording {
  animation: pulse-red 1s infinite;
}

@keyframes pulse-red {
  0%, 100% { box-shadow: 0 0 14px rgba(255, 23, 68, 0.5); }
  50% { box-shadow: 0 0 30px rgba(255, 23, 68, 0.9); }
}

.record-dot {
  width: 12px;
  height: 12px;
  background: #fff;
  border-radius: 50%;
}

.vocal-take-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.take-info {
  display: flex;
  justify-content: space-between;
  font-weight: 700;
}

.take-audio-player {
  width: 100%;
}

.vocal-notes-card {
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-md);
  padding: 16px;
  color: var(--text-muted);
  font-size: 12px;
}

.vocal-notes-card h3 {
  color: var(--text-main);
  margin-bottom: 6px;
}

.vocal-notes-card ul {
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

/* ========================================================================= */
/* TAB 3: ASISTENTE IA                                                       */
/* ========================================================================= */
.ai-connection-indicator-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  font-size: 11px;
  color: var(--text-muted);
}

.ai-assistant-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.ai-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.card-heading {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
}

.form-select,
.form-input,
.form-textarea {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  color: var(--text-main);
  font-family: inherit;
  font-size: 13px;
  outline: none;
  transition: border-color 0.15s;
}

.form-select:focus,
.form-input:focus,
.form-textarea:focus {
  border-color: var(--neon-cyan);
}

.prompt-chips-container {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.chips-label {
  font-size: 10px;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
}

.btn-prompt-chip {
  padding: 4px 10px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  color: var(--text-muted);
  font-size: 11px;
  cursor: pointer;
  transition: all 0.1s;
}

.btn-prompt-chip:hover {
  background: var(--bg-card-hover);
  color: var(--neon-cyan);
  border-color: var(--neon-cyan);
}

.btn-primary.btn-large {
  width: 100%;
  padding: 12px;
  background: linear-gradient(135deg, var(--neon-cyan), #00b0ff);
  border: none;
  border-radius: var(--radius-md);
  color: #07090e;
  font-weight: 800;
  font-size: 14px;
  cursor: pointer;
  box-shadow: 0 0 14px var(--neon-cyan-glow);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  transition: all 0.15s;
}

.btn-primary.btn-large:hover {
  filter: brightness(1.15);
  transform: translateY(-1px);
}

/* Salida del Asistente */
.ai-empty-placeholder {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
}

.placeholder-icon {
  font-size: 36px;
  display: block;
  margin-bottom: 10px;
}

.placeholder-subtext {
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 4px;
}

.ai-result-meta {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.meta-tag {
  padding: 3px 8px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 10px;
  font-weight: 700;
  color: var(--neon-cyan);
  text-transform: uppercase;
}

.ai-explanation-box {
  background: rgba(0, 242, 254, 0.05);
  border-left: 3px solid var(--neon-cyan);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  line-height: 1.6;
}

.ai-mini-grid {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: var(--bg-surface);
  padding: 8px;
  border-radius: var(--radius-sm);
}

.mini-grid-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

.mini-row-label {
  width: 60px;
  font-size: 9px;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mini-steps-box {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(16, 1fr);
  gap: 2px;
}

.mini-step-dot {
  height: 10px;
  background: var(--step-inactive);
  border-radius: 2px;
}

.mini-step-dot.active {
  background: var(--neon-cyan);
}

.ai-apply-actions {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}

/* ========================================================================= */
/* TAB 4: PROYECTOS                                                          */
/* ========================================================================= */
.projects-layout-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.project-actions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.btn-secondary {
  padding: 10px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-weight: 600;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.1s;
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-focus);
}

.btn-danger {
  padding: 10px;
  background: rgba(255, 51, 75, 0.1);
  border: 1px solid rgba(255, 51, 75, 0.3);
  border-radius: var(--radius-md);
  color: var(--neon-red);
  font-weight: 600;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.1s;
}

.btn-danger:hover {
  background: rgba(255, 51, 75, 0.2);
}

.presets-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.preset-card-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: border-color 0.1s;
}

.preset-card-item:hover {
  border-color: var(--neon-cyan);
}

.preset-item-title {
  font-weight: 700;
  font-size: 13px;
  color: var(--text-main);
}

.preset-item-desc {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ========================================================================= */
/* TAB 5: DIAGNÓSTICO                                                        */
/* ========================================================================= */
.diagnostics-cards-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.diag-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.diag-card.full-width {
  grid-column: 1 / -1;
}

.diag-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
  font-size: 12px;
}

.diag-table td {
  padding: 8px 4px;
  border-bottom: 1px solid var(--border-subtle);
}

.diag-table td:first-child {
  color: var(--text-muted);
  width: 45%;
}

.diag-table td:last-child {
  font-family: var(--font-mono);
  color: var(--neon-cyan);
}

.diag-actions {
  margin-top: 14px;
}

.diag-guide-content {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-muted);
}

.diag-guide-content strong {
  color: var(--text-main);
}

.diag-guide-content ol,
.diag-guide-content ul {
  padding-left: 20px;
  margin: 6px 0 12px 0;
}

/* ========================================================================= */
/* TOAST NOTIFICATION                                                        */
/* ========================================================================= */
.toast-notification {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 12px 20px;
  background: #182030;
  border: 1px solid var(--neon-cyan);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-weight: 600;
  font-size: 13px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.6);
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.25s ease;
  pointer-events: none;
  z-index: 1000;
}

.toast-notification.show {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================================================= */
/* RESPONSIVE DESIGN                                                         */
/* ========================================================================= */
@media (max-width: 1024px) {
  .ai-assistant-grid,
  .projects-layout-grid,
  .diagnostics-cards-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .studio-layout {
    flex-direction: column;
  }

  .studio-sidebar {
    width: 100%;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
    padding: 8px 12px;
  }

  .nav-menu {
    flex-direction: row;
    overflow-x: auto;
  }

  .sidebar-status-card {
    display: none;
  }

  .transport-bar {
    padding: 0 10px;
    height: auto;
    flex-wrap: wrap;
    gap: 10px;
    padding-bottom: 8px;
  }

  .track-controls {
    width: 140px;
  }

  .track-vol-slider {
    display: none;
  }
}

/* ========================================================================= */
/* v1.1 EXPANSION — 16 VOCES · TRACKPAD FX · RECORD STUDIO · BASES · SAMPLES  */
/* ========================================================================= */

/* --- Resolución dinámica del patrón (16/32/64 pasos) --- */
.steps-timeline,
.track-steps {
  grid-template-columns: repeat(var(--steps-count, 16), 1fr);
}

.steps-control-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.steps-control-group .control-label {
  font-size: 10px;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.select-compact {
  width: 70px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  border-radius: var(--radius-sm);
  padding: 6px 4px;
  font-weight: 700;
  cursor: pointer;
}

/* --- Color por instrumento en las filas y pasos activos --- */
.track-color-pill {
  width: 10px;
  height: 24px;
  border-radius: 3px;
  flex-shrink: 0;
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.15);
}

.track-row .track-name-btn:hover {
  color: var(--track-accent, var(--neon-cyan));
}

.track-row .step-btn.active {
  background: linear-gradient(135deg, var(--track-accent, var(--step-active)) 0%, rgba(7, 9, 14, 0.3) 170%);
  border-color: var(--track-accent, var(--step-active));
  box-shadow: 0 0 10px var(--neon-cyan-glow);
}

.step-btn.active.vel-soft {
  filter: brightness(0.6) saturate(0.85);
}

.step-btn.active.vel-hard {
  box-shadow: 0 0 14px var(--neon-cyan-glow), 0 0 4px rgba(255, 255, 255, 0.5);
}

/* --- Botones de muestra local (Sample Studio por pista) --- */
.btn-sample {
  width: 26px;
  height: 22px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-dim);
  font-size: 11px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.1s;
  flex-shrink: 0;
}

.btn-sample:hover {
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
}

.btn-sample.loaded {
  border-color: var(--neon-green);
  color: var(--neon-green);
}

.btn-sample-clear {
  width: 20px;
  height: 22px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-dim);
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.btn-sample-clear:hover {
  color: var(--neon-red);
}

/* --- Toggle genérico activo (latch, monitor, gate, wx-export) --- */
.btn-secondary.active {
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
  box-shadow: 0 0 10px var(--neon-cyan-glow);
}

/* ========================================================================= */
/* TAB TRACKPAD FX                                                           */
/* ========================================================================= */
.trackpad-layout-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 20px;
}

.trackpad-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: var(--shadow-card);
}

.trackpad-canvas {
  width: 100%;
  height: auto;
  aspect-ratio: 800 / 480;
  display: block;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: #0b0f18;
  touch-action: none;      /* multitáctil: el pad captura los gestos */
  cursor: crosshair;
  box-shadow: inset 0 0 50px rgba(0, 0, 0, 0.55);
}

.trackpad-axes-hint {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.trackpad-toggles {
  display: flex;
  gap: 10px;
  margin-top: 14px;
  flex-wrap: wrap;
}

.trackpad-preset-bar {
  margin-top: 16px;
}

.btn-pad-preset {
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.12s;
}

.btn-pad-preset:hover {
  border-color: var(--neon-purple, #a855f7);
  color: var(--neon-purple, #a855f7);
}

.trackpad-notes ul {
  padding-left: 18px;
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-muted);
}

.trackpad-notes .card-heading {
  margin-top: 18px;
}

/* ========================================================================= */
/* TAB RECORD STUDIO                                                         */
/* ========================================================================= */
.rec-studio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.rec-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: var(--shadow-card);
}

.rec-open-btn {
  width: 100%;
  margin-top: 10px;
}

.rec-meter-group {
  margin-top: 12px;
}

.rec-meter-track {
  height: 8px;
  background: #0a0e16;
  border-radius: 6px;
  border: 1px solid var(--border-subtle);
  overflow: hidden;
}

.rec-meter-fill {
  height: 100%;
  width: 0%;
  background: var(--neon-cyan);
  transition: width 0.08s linear, background 0.15s;
}

.mic-canvas {
  width: 100%;
  height: 90px;
  display: block;
  margin-top: 8px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: #090c12;
}

.rec-mode-row {
  display: flex;
  gap: 12px;
}

.rec-mode-row .form-group {
  flex: 1;
}

.rec-countdown {
  margin-top: 14px;
  padding: 12px 8px;
  text-align: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--neon-amber);
  border: 1px dashed var(--border-subtle);
  border-radius: var(--radius-md);
  min-height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.rec-buttons {
  display: flex;
  gap: 10px;
  margin-top: 14px;
}

.rec-buttons .btn-record-main {
  flex: 1;
}

.rec-buttons .btn-secondary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.rec-takes-card {
  margin-top: 20px;
}

.takes-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 10px;
}

.takes-empty,
.base-empty {
  padding: 16px;
  text-align: center;
  font-size: 12px;
  color: var(--text-dim);
  border: 1px dashed var(--border-subtle);
  border-radius: var(--radius-md);
}

.take-card-v2 {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: var(--bg-card-hover);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.take-info {
  flex: 1;
  min-width: 200px;
}

.take-name {
  font-weight: 700;
  font-size: 13px;
  color: var(--text-main);
}

.take-meta {
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
}

.take-player {
  flex: 0 0 260px;
  height: 32px;
}

.take-actions-v2 {
  display: flex;
  gap: 8px;
}

/* ========================================================================= */
/* TAB BASES IMPORTADAS                                                      */
/* ========================================================================= */
.base-layout-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.base-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: var(--shadow-card);
}

.base-import-buttons {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.base-info {
  margin-top: 10px;
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.6;
}

.base-note {
  margin-top: 10px;
  padding: 10px 12px;
  font-size: 11px;
  line-height: 1.6;
  color: #ffd88a;
  background: rgba(255, 184, 0, 0.06);
  border: 1px solid rgba(255, 184, 0, 0.25);
  border-radius: var(--radius-md);
}

.base-loop-group label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-main);
  cursor: pointer;
}

.base-item input[type="radio"],
.form-group input[type="checkbox"] {
  accent-color: var(--neon-cyan);
}

.base-list-card {
  margin-top: 20px;
}

.base-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 10px;
  max-height: 420px;
  overflow-y: auto;
}

.base-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  background: var(--bg-card-hover);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.base-item.active {
  border-color: var(--neon-cyan);
  background: var(--bg-card-active);
  box-shadow: 0 0 8px var(--neon-cyan-glow);
}

.base-name {
  flex: 1;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.base-dur {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
}

.btn-base-remove {
  width: 26px;
  height: 26px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-dim);
  font-size: 13px;
  cursor: pointer;
  flex-shrink: 0;
}

.btn-base-remove:hover {
  color: var(--neon-red);
  border-color: var(--neon-red);
}

/* --- Modificación responsive de los módulos nuevos --- */
@media (max-width: 1024px) {
  .trackpad-layout-grid,
  .base-layout-grid,
  .rec-studio-grid {
    grid-template-columns: 1fr;
  }

  .take-player {
    flex-basis: 100%;
  }
}

/* ========================================================================= */
/* v1.1.1 — PROVEEDORES DE IA (Tarjeta de Diagnóstico)                        */
/* ========================================================================= */
.diag-note {
  font-size: 11px;
  line-height: 1.6;
  color: var(--text-muted);
  margin: 8px 0;
}

.diag-note code {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--neon-cyan);
}

.ai-provider-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 12px 0;
}

.ai-provider-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 10px 12px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.02);
}

.ai-provider-row.active {
  border-color: var(--neon-cyan);
  box-shadow: 0 0 10px rgba(0, 242, 254, 0.15);
}

.prov-main {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.prov-state {
  font-size: 14px;
  flex-shrink: 0;
}

.prov-name {
  font-weight: 700;
  font-size: 13px;
  color: var(--text-main);
}

.prov-kind {
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-dim);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 2px 8px;
}

.prov-url {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  user-select: text;
}

.prov-detail {
  font-size: 11px;
  line-height: 1.5;
  color: var(--text-muted);
}

.prov-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.prov-model {
  width: 200px;
  max-width: 48vw;
}

.btn-xs {
  padding: 4px 10px;
  font-size: 11px;
}

.field-disabled {
  opacity: 0.45;
}

.prov-subheading {
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
  margin: 14px 0 8px 0;
}

.ai-prov-form-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.ai-prov-form-row .form-input,
.ai-prov-form-row .form-select {
  flex: 1;
  min-width: 160px;
}

.ai-prov-form-row .form-input::placeholder {
  color: var(--text-dim);
}

.api-key-note {
  border-left: 3px solid var(--neon-cyan);
  padding-left: 8px;
}

/* ========================================================================= */
/* v1.1.1 — RESPONSIVE MÓVIL / TABLET (Android · iOS · iPad)                  */
/* ====================================================================== */
/* El estudio está pensado para escritorio, pero se usa perfectamente en      */
/* móvil: barra lateral en fila, secuenciador con scroll horizontal sincronizado,*/
/* transport bar deslizable y objetivos táctiles de 40px+.                    */
/* ========================================================================= */

@media (max-width: 768px) {
  /* Secuenciador: la fila de instrumentos y la regla comparten un scroller */
  .sequencer-scroll-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: var(--radius-lg);
  }

  .sequencer-scroll-wrap .sequencer-grid,
  .sequencer-scroll-wrap .sequencer-timeline-header {
    min-width: 780px;
  }

  /* Alineación fina de la regla con el inicio de los pasos de las filas */
  .sequencer-scroll-wrap .track-header-spacer {
    width: 234px;
  }

  /* Transport bar: en móvil se desliza horizontalmente para no aplastar controles */
  .transport-controls {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 2px;
  }

  .transport-time-display {
    display: none; /* el compás sigue en el secuenciador; gana espacio táctil */
  }

  .studio-workspace {
    padding: 12px;
  }
}

@media (max-width: 480px) {
  .transport-bar {
    padding: 6px 8px 8px 8px;
  }

  .transport-brand {
    min-width: 0;
  }

  .brand-subtitle {
    display: none;
  }

  #master-visualizer {
    display: none;
  }

  .btn-transport {
    padding: 10px 14px; /* objetivo táctil ≥40px */
  }

  .panel-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .prompt-chips-container {
    flex-wrap: wrap;
  }

  .ai-prov-form-row .form-input,
  .ai-prov-form-row .form-select {
    min-width: 100%;
  }

  .prov-model {
    width: 100%;
    max-width: none;
  }
}

/* ========================================================================= */
/* v1.2 — PADS: CAJA DE RITMOS 4X4                                           */
/* ========================================================================= */
.pads-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.pads-controls {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

#btn-pads-rec.rec-armed {
  color: var(--neon-red);
  border-color: rgba(255, 51, 75, 0.45);
  box-shadow: 0 0 10px rgba(255, 51, 75, 0.25);
  font-weight: 800;
}

.pads-vel-group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 220px;
}

.pads-vel-group input[type="range"] {
  flex: 1;
  accent-color: var(--neon-cyan);
  cursor: pointer;
}

.pads-vel-val {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--neon-cyan);
  min-width: 38px;
  text-align: right;
}

.pads-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  touch-action: manipulation;
}

.pad {
  position: relative;
  aspect-ratio: 1 / 1;
  min-height: 64px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  background-color: var(--pad-bg, rgba(255, 255, 255, 0.03));
  background-image: radial-gradient(circle at 50% 30%, rgba(255, 255, 255, 0.04), transparent 70%);
  cursor: pointer;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 10px 6px;
  overflow: hidden;
  transition: transform 0.06s ease, box-shadow 0.1s ease, border-color 0.1s ease;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.pad:hover {
  border-color: var(--pad-accent);
}

.pad:active,
.pad.pressed {
  transform: scale(0.94);
  box-shadow: 0 0 18px var(--pad-accent);
}

.pad.flash {
  box-shadow: 0 0 22px var(--pad-accent), inset 0 0 26px color-mix(in srgb, var(--pad-accent) 45%, transparent);
  border-color: var(--pad-accent);
}

.pad-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-main);
  text-align: center;
  line-height: 1.2;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.6);
}

.pad-key {
  position: absolute;
  top: 6px;
  right: 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 800;
  color: var(--text-dim);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: 1px 5px;
  background: rgba(0, 0, 0, 0.25);
}

@media (max-width: 480px) {
  .pads-grid {
    gap: 8px;
  }

  .pad {
    min-height: 72px; /* target táctil amplio en móvil */
  }

  .pad-label {
    font-size: 9px;
  }
}