/**
 * Fijate Tools - Separador de Pistas y Creador de Karaoke
 * Estilos canónicos y DAW Studio Theme (Midnight Slate)
 */

:root {
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Paleta Dark Theme (Predeterminado) */
  --bg-page: #0b0f17;
  --bg-card: #111827;
  --bg-card-subtle: #1e293b;
  --border-color: #1f2937;
  --border-subtle: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  /* Acentos de estudio de sonido */
  --color-vocal: #06b6d4;
  --color-inst: #d946ef;
  --color-bass: #10b981;
  --color-drums: #f59e0b;
  --color-accent: #3b82f6;
  --color-danger: #ef4444;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -2px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 15px rgba(6, 182, 212, 0.35);
}

[data-theme="light"] {
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-subtle: #f1f5f9;
  --border-color: #e2e8f0;
  --border-subtle: #cbd5e1;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
}

/* Base */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-page);
  color: var(--text-primary);
  margin: 0;
  padding: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: clip;
  width: 100%;
  max-width: 100%;
}

.tool-layout h1,
.tool-layout h2,
.tool-layout h3,
.tool-layout h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.25;
}

/* Layout Canónico */
.tool-layout {
  max-width: 1200px;
  width: 100%;
  margin: 1.5rem auto 3rem;
  padding: 0 1rem;
  flex: 1;
}

.tool-with-sidebar {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 1536px) {
  .tool-with-sidebar {
    grid-template-columns: 1fr 300px;
  }
}

.tool-main-content {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Sidebar AdSense */
.tool-ad-sidebar {
  display: none;
}

@media (min-width: 1536px) {
  .tool-ad-sidebar {
    display: block;
    position: sticky;
    top: 5rem;
    height: fit-content;
  }
}

/* Tarjeta interactiva principal canónica */
.card-main {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

@media (max-width: 640px) {
  .card-main {
    padding: 1rem;
    border-radius: 12px;
    gap: 1rem;
  }
}

/* Hero Section */
.tool-hero {
  text-align: center;
  padding: 0.5rem 0.5rem 0;
}

.tool-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.3);
  color: var(--color-vocal);
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.tool-hero h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.3rem);
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.tool-hero p {
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto;
  font-size: 1rem;
  line-height: 1.55;
}

/* Zona de Carga / Drop Zone */
.drop-zone-card {
  background: var(--bg-card);
  border: 2px dashed var(--border-color);
  border-radius: 16px;
  padding: 3rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.25s ease;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.drop-zone-card:hover, .drop-zone-card.drag-active {
  border-color: var(--color-vocal);
  background: rgba(6, 182, 212, 0.04);
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.15);
}

.upload-icon-box {
  width: 68px;
  height: 68px;
  border-radius: 16px;
  background: rgba(6, 182, 212, 0.12);
  color: var(--color-vocal);
  display: flex;
  align-items: center;
  justify-content: center;
}

.drop-zone-card h3 {
  font-size: 1.3rem;
}

.drop-zone-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  max-width: 480px;
}

.upload-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 0.5rem;
}

.btn-primary-action {
  background: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  color: #ffffff;
  border: none;
  border-radius: 10px;
  padding: 0.75rem 1.4rem;
  font-size: 0.95rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  min-height: 44px;
  transition: transform 0.15s ease, box-shadow 0.2s ease;
}

.btn-primary-action:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(6, 182, 212, 0.4);
}

.btn-secondary-action {
  background: var(--bg-card-subtle);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 0.75rem 1.4rem;
  font-size: 0.95rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  min-height: 44px;
  transition: all 0.2s ease;
}

.btn-secondary-action:hover {
  background: var(--border-color);
  border-color: var(--border-subtle);
}

/* Espacio de trabajo DAW */
.daw-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.25rem;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* Barra superior de transporte */
.daw-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.transport-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.btn-transport {
  background: var(--bg-card-subtle);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.5rem 0.9rem;
  font-size: 0.88rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  min-height: 40px;
  transition: all 0.15s ease;
}

.btn-transport:hover {
  background: var(--border-color);
}

.btn-transport.btn-play-main {
  background: var(--color-vocal);
  color: #0b0f17;
  border-color: var(--color-vocal);
  padding: 0.5rem 1.2rem;
  font-weight: 700;
}

.btn-transport.btn-play-main.active {
  background: #f59e0b;
  border-color: #f59e0b;
}

.btn-transport.active {
  background: rgba(6, 182, 212, 0.2);
  border-color: var(--color-vocal);
  color: var(--color-vocal);
}

.time-display {
  font-family: var(--font-mono);
  background: #060911;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.45rem 0.75rem;
  font-size: 0.95rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  min-height: 40px;
}

.time-current {
  color: #22d3ee;
}

.time-divider {
  color: var(--text-muted);
}

.time-total {
  color: var(--text-secondary);
}

/* Modificadores de Tono y Tempo */
.pitch-tempo-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.pitch-box {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  background: var(--bg-card-subtle);
  padding: 0.25rem 0.5rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  min-height: 40px;
}

.pitch-label-title {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 700;
  margin-right: 0.2rem;
}

.pitch-val {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-vocal);
  min-width: 44px;
  text-align: center;
  font-size: 0.88rem;
}

.btn-mini-step {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.9rem;
}

.btn-mini-step:hover {
  background: var(--border-color);
}

.tempo-select {
  background: var(--bg-card-subtle);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.45rem 0.75rem;
  font-size: 0.88rem;
  font-family: var(--font-mono);
  font-weight: 600;
  height: 40px;
  cursor: pointer;
}

/* Módulo especial de Karaoke Rápido y Micrófono */
.karaoke-quick-bar {
  background: linear-gradient(135deg, rgba(217, 70, 239, 0.08) 0%, rgba(6, 182, 212, 0.08) 100%);
  border: 1px solid rgba(217, 70, 239, 0.25);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.karaoke-quick-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.karaoke-badge {
  background: var(--color-inst);
  color: #ffffff;
  padding: 0.25rem 0.65rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.karaoke-slider-box {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 1;
  min-width: 240px;
}

.karaoke-slider {
  flex: 1 1 0%;
  width: 0;
  min-width: 0;
  accent-color: var(--color-inst);
  cursor: pointer;
  height: 6px;
}

.karaoke-val {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-inst);
  min-width: 45px;
  text-align: right;
  font-size: 0.95rem;
}

.btn-mic-karaoke {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.5rem 1rem;
  font-size: 0.88rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  min-height: 40px;
  transition: all 0.2s ease;
}

.btn-mic-karaoke.active {
  background: rgba(239, 68, 68, 0.15);
  border-color: #ef4444;
  color: #ef4444;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #64748b;
}

.status-dot.active {
  background: #ef4444;
  box-shadow: 0 0 8px #ef4444;
  animation: pulseMic 1.5s infinite;
}

@keyframes pulseMic {
  0% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.6; }
  100% { transform: scale(1); opacity: 1; }
}

/* Timeline Canvas */
.timeline-canvas-wrap {
  width: 100%;
  height: 36px;
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  background: #0f172a;
}

.timeline-canvas-wrap canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* Mesa de Mezcla Multicanal (Tracks) */
.daw-tracks-container {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.channel-strip {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 0.75rem 1rem;
  display: grid;
  grid-template-columns: 220px 1fr 14px;
  align-items: center;
  gap: 1rem;
  transition: border-color 0.2s ease;
}

@media (max-width: 860px) {
  .channel-strip {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }
}

.channel-strip:hover {
  border-color: var(--border-subtle);
}

/* Pista 1: Voz */
.channel-strip[data-channel="vocal"] {
  border-left: 4px solid var(--color-vocal);
}
/* Pista 2: Instrumental */
.channel-strip[data-channel="instrumental"] {
  border-left: 4px solid var(--color-inst);
}
/* Pista 3: Bajo */
.channel-strip[data-channel="bass"] {
  border-left: 4px solid var(--color-bass);
}
/* Pista 4: Batería */
.channel-strip[data-channel="drums"] {
  border-left: 4px solid var(--color-drums);
}

/* Controles de cabecera de pista */
.channel-header {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

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

.channel-title {
  font-size: 0.95rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.channel-strip[data-channel="vocal"] .channel-title { color: var(--color-vocal); }
.channel-strip[data-channel="instrumental"] .channel-title { color: var(--color-inst); }
.channel-strip[data-channel="bass"] .channel-title { color: var(--color-bass); }
.channel-strip[data-channel="drums"] .channel-title { color: var(--color-drums); }

.channel-buttons {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.btn-solo, .btn-mute, .btn-dl-track {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-mute.active {
  background: #ef4444;
  border-color: #ef4444;
  color: #ffffff;
}

.btn-solo.active {
  background: #f59e0b;
  border-color: #f59e0b;
  color: #0b0f17;
}

.btn-dl-track:hover {
  background: var(--border-color);
  color: var(--text-primary);
}

/* Faders de volumen y paneo */
.faders-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.fader-box {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex: 1;
}

.fader-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 700;
  width: 24px;
}

.channel-slider {
  flex: 1 1 0%;
  width: 0;
  min-width: 0;
  height: 5px;
  cursor: pointer;
}

.channel-strip[data-channel="vocal"] .channel-slider { accent-color: var(--color-vocal); }
.channel-strip[data-channel="instrumental"] .channel-slider { accent-color: var(--color-inst); }
.channel-strip[data-channel="bass"] .channel-slider { accent-color: var(--color-bass); }
.channel-strip[data-channel="drums"] .channel-slider { accent-color: var(--color-drums); }

.fader-val {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-secondary);
  width: 38px;
  text-align: right;
}

/* Contenedor de la Onda de Audio */
.channel-wave-container {
  height: 54px;
  background: #090d16;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.channel-wave-container canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* Vúmetro vertical */
.vu-meter-box {
  width: 14px;
  height: 54px;
  background: #090d16;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.vu-meter-box canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* Barra inferior del DAW */
.daw-bottom-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.master-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.master-fader-box {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-card-subtle);
  padding: 0.4rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.master-fader-box span {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
}

.master-vu {
  width: 14px;
  height: 32px;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.master-vu canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* Modales */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 9999;
}

.modal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.75rem;
  max-width: 520px;
  width: 100%;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

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

.modal-header h3 {
  font-size: 1.25rem;
}

.btn-close-modal {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.25rem;
}

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

.export-options-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.export-option-card {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.export-opt-info h4 {
  font-size: 0.95rem;
  margin-bottom: 0.2rem;
}

.export-opt-info p {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.progress-bar-bg {
  width: 100%;
  height: 8px;
  background: var(--bg-card-subtle);
  border-radius: 9999px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #06b6d4, #d946ef);
  transition: width 0.2s ease;
}

/* Guía SEO y FAQ */
.seo-guide-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2rem 1.5rem;
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.seo-guide-section h2 {
  font-size: 1.4rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.seo-guide-section h3 {
  font-size: 1.15rem;
  margin-top: 0.5rem;
}

.seo-guide-section p {
  color: var(--text-secondary);
  line-height: 1.65;
  font-size: 0.95rem;
}

.faq-accordion details {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  margin-bottom: 0.75rem;
  overflow: hidden;
}

.faq-accordion summary {
  padding: 1rem 1.25rem;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.faq-accordion summary::-webkit-details-marker {
  display: none;
}

.faq-accordion summary::after {
  content: '+';
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-vocal);
  transition: transform 0.2s ease;
}

.faq-accordion details[open] summary::after {
  content: '−';
}

.faq-content {
  padding: 0 1.25rem 1.25rem;
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
}