/* ==========================================================================
   Afinador de Instrumentos - Estilos Principales
   Fijate Tools 2026
   ========================================================================== */

:root {
  --bg-main: #0f172a;
  --bg-card: #1e293b;
  --bg-card-hover: #334155;
  --bg-input: #0f172a;
  --border-color: #334155;
  --border-focus: #38bdf8;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --color-primary: #38bdf8;
  --color-primary-rgb: 56, 189, 248;
  --color-success: #10b981;
  --color-success-rgb: 16, 185, 129;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-card: 0 10px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --bg-input: #f8fafc;
  --border-color: #e2e8f0;
  --border-focus: #0284c7;
  
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #94a3b8;
  
  --shadow-card: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.03);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Cabecera */
.app-header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn-back-tools {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.85rem;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: var(--transition);
}

.btn-back-tools:hover {
  background: var(--bg-card-hover);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.brand-area {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-logo-box {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.2), rgba(16, 185, 129, 0.2));
  border: 1px solid rgba(56, 189, 248, 0.4);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.brand-info {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.2;
}

.brand-subtitle {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: none !important;
}

.btn-icon {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

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

/* Layout Principal con Sidebar */
.main-wrapper {
  flex: 1;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  padding: 1.5rem;
}

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

/* Hero */
.tool-hero {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
}

.tool-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.75rem;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: var(--radius-full);
  color: var(--color-primary);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.tool-hero h2 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.tool-hero p {
  color: var(--text-muted);
  font-size: 0.975rem;
  max-width: 780px;
}

/* Tarjeta de controles */
.tuner-controls-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.75rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  box-shadow: var(--shadow-card);
}

.control-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.control-group label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
}

.form-select {
  background: var(--bg-input);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.6rem 1rem;
  font-size: 0.95rem;
  font-family: inherit;
  cursor: pointer;
  outline: none;
  transition: var(--transition);
}

.form-select:focus {
  border-color: var(--border-focus);
}

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

.btn-step {
  background: transparent;
  border: none;
  color: var(--text-main);
  padding: 0.5rem 0.85rem;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}

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

#a4-value {
  padding: 0 0.75rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.95rem;
  font-weight: 600;
}

/* Selector de cuerdas */
.strings-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  justify-content: center;
}

.btn-string {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.6rem 1.1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
  cursor: pointer;
  transition: var(--transition);
  min-width: 68px;
}

.btn-string:hover {
  background: var(--bg-card-hover);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.btn-string.active {
  background: rgba(56, 189, 248, 0.15);
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.3);
}

.string-name {
  font-family: 'Outfit', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
}

.string-freq {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Bloque Principal del Afinador */
.tuner-display-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.25rem 1.75rem;
  box-shadow: var(--shadow-card);
  text-align: center;
}

.tuner-action-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  padding: 2.5rem 1rem;
}

.btn-start-tuner {
  background: linear-gradient(135deg, #0284c7, #06b6d4);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-full);
  padding: 1.1rem 2.25rem;
  font-size: 1.15rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  box-shadow: 0 10px 25px rgba(2, 132, 199, 0.4);
  transition: var(--transition);
}

.btn-start-tuner:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 15px 30px rgba(2, 132, 199, 0.5);
}

.tuner-hint {
  color: var(--text-muted);
  font-size: 0.875rem;
  max-width: 500px;
}

/* Área del Dial */
.tuner-gauge-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

/* LEDs de afinación */
.tuning-leds {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  width: 100%;
  max-width: 460px;
}

.led {
  flex: 1;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-dim);
  transition: var(--transition);
}

.led.active-flat {
  background: rgba(245, 158, 11, 0.2);
  border-color: var(--color-warning);
  color: var(--color-warning);
  box-shadow: 0 0 15px rgba(245, 158, 11, 0.4);
}

.led.active-tune {
  background: rgba(16, 185, 129, 0.25);
  border-color: var(--color-success);
  color: var(--color-success);
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.6);
  animation: pulse-tune 1.5s infinite;
}

.led.active-sharp {
  background: rgba(239, 68, 68, 0.2);
  border-color: var(--color-danger);
  color: var(--color-danger);
  box-shadow: 0 0 15px rgba(239, 68, 68, 0.4);
}

@keyframes pulse-tune {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.03); }
}

/* Nota Detectada */
.note-box {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.25rem;
}

.detected-note {
  font-family: 'Outfit', sans-serif;
  font-size: 4.5rem;
  font-weight: 800;
  line-height: 1;
  color: var(--text-main);
  transition: var(--transition);
}

.detected-note.in-tune {
  color: var(--color-success);
  text-shadow: 0 0 30px rgba(16, 185, 129, 0.5);
}

.detected-octave {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-muted);
}

/* Dial de Aguja */
.gauge-dial {
  width: 100%;
  max-width: 520px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem 1.75rem;
  position: relative;
}

.gauge-scale {
  display: flex;
  justify-content: space-between;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 0.75rem;
}

.scale-mark.mark-0 {
  color: var(--color-success);
  font-weight: 700;
}

.gauge-needle-track {
  height: 16px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-full);
  position: relative;
  overflow: visible;
  border: 1px solid var(--border-color);
}

.gauge-needle-track::before {
  content: '';
  position: absolute;
  left: 50%;
  top: -6px;
  bottom: -6px;
  width: 2px;
  background: var(--color-success);
  transform: translateX(-50%);
  z-index: 1;
}

.gauge-needle {
  position: absolute;
  top: -10px;
  bottom: -10px;
  width: 14px;
  height: 36px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  left: 50%;
  transform: translateX(-50%);
  transition: left 0.1s cubic-bezier(0.1, 0.9, 0.2, 1), background-color 0.2s;
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.6);
  z-index: 2;
}

.gauge-needle.in-tune {
  background: var(--color-success);
  box-shadow: 0 0 15px rgba(16, 185, 129, 0.8);
}

.gauge-needle.flat {
  background: var(--color-warning);
  box-shadow: 0 0 12px rgba(245, 158, 11, 0.6);
}

.gauge-needle.sharp {
  background: var(--color-danger);
  box-shadow: 0 0 12px rgba(239, 68, 68, 0.6);
}

/* Métricas Digitales */
.digital-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  width: 100%;
  max-width: 520px;
}

.metric-card {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.metric-label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.metric-val {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
}

/* Osciloscopio */
.visualizer-box {
  width: 100%;
  max-width: 520px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.5rem;
  overflow: hidden;
}

#canvas-oscilloscope {
  width: 100%;
  height: 60px;
  display: block;
}

/* Sub-acciones */
.tuner-sub-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.btn-sub {
  background: var(--bg-input);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.65rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: var(--transition);
}

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

.btn-sub-danger:hover {
  border-color: var(--color-danger);
  color: var(--color-danger);
}

/* Guía de afinación */
.info-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
}

.info-card h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.35rem;
  margin-bottom: 1.25rem;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.info-item {
  display: flex;
  gap: 0.85rem;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.info-icon {
  font-size: 1.5rem;
  line-height: 1;
}

.info-item h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.info-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Modales */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1rem;
}

.modal-dialog {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  max-width: 480px;
  width: 100%;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  animation: modal-pop 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes modal-pop {
  from { transform: scale(0.92); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.2rem;
}

.btn-modal-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
}

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

.modal-body {
  padding: 1.5rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
}

.btn-primary {
  background: var(--color-primary);
  color: #0f172a;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.6rem 1.25rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary:hover {
  filter: brightness(1.1);
}

/* Responsivo */
@media (max-width: 1024px) {
}

@media (max-width: 640px) {
  .header-container {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    gap: 0.75rem;
  }
  
  .header-left {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  
  .info-grid {
    grid-template-columns: 1fr;
  }
  
  .digital-metrics {
    grid-template-columns: 1fr;
  }
  
  .detected-note {
    font-size: 3.5rem;
  }
}