/* ==========================================================================
   Entrenador CBIT de inversión de hábito y control de tics - Estilos canónicos
   ========================================================================== */

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

  /* Tema oscuro por defecto */
  --bg-page: #0b0f19;
  --bg-card: #111827;
  --bg-card-secondary: #1a2234;
  --bg-card-hover: #1f2a40;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-color-focus: #3b82f6;

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;

  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --primary-glow: rgba(59, 130, 246, 0.25);
  --success: #10b981;
  --success-glow: rgba(16, 185, 129, 0.25);
  --warning: #f59e0b;
  --danger: #ef4444;
  --purple: #8b5cf6;
  --teal: #14b8a6;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  --shadow-card: 0 4px 20px -2px rgba(0, 0, 0, 0.5);
  --shadow-modal: 0 20px 40px -4px rgba(0, 0, 0, 0.7);
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

[data-theme="light"] {
  --bg-page: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-secondary: #f8fafc;
  --bg-card-hover: #f1f5f9;
  --border-color: #e2e8f0;
  --border-color-focus: #2563eb;

  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;

  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-glow: rgba(37, 99, 235, 0.2);
  --success: #059669;
  --success-glow: rgba(5, 150, 105, 0.2);
  --warning: #d97706;
  --danger: #dc2626;

  --shadow-card: 0 4px 16px -2px rgba(0, 0, 0, 0.08);
  --shadow-modal: 0 20px 35px -5px rgba(0, 0, 0, 0.2);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: clip;
  width: 100%;
  max-width: 100%;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Layout principal */
.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: minmax(0, 1fr);
  gap: 1.5rem;
}

@media (min-width: 1536px) {
  .tool-with-sidebar {
    grid-template-columns: minmax(0, 1fr) 300px;
  }
}

.tool-main-content {
  min-width: 0;
  width: 100%;
}

/* Tarjeta principal */
.card-main {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  padding: 1.5rem;
  margin-bottom: 2rem;
}

@media (min-width: 768px) {
  .card-main {
    padding: 2.25rem;
  }
}

/* Hero & Cabecera de herramienta */
.tool-header-intro {
  margin-bottom: 1.75rem;
  text-align: center;
}

.badge-clinical {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(59, 130, 246, 0.12);
  color: var(--primary);
  border: 1px solid rgba(59, 130, 246, 0.25);
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.tool-hero-title {
  font-family: var(--font-heading);
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.tool-hero-subtitle {
  color: var(--text-secondary);
  font-size: 0.98rem;
  max-width: 760px;
  margin: 0 auto;
}

/* Stepper de flujo CBIT */
.cbit-stepper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  margin: 2rem 0;
  padding: 0 0.5rem;
}

.cbit-stepper::before {
  content: '';
  position: absolute;
  top: 18px;
  left: 30px;
  right: 30px;
  height: 2px;
  background: var(--border-color);
  z-index: 1;
}

.step-item {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 600;
  transition: var(--transition-normal);
}

.step-circle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-card-secondary);
  border: 2px solid var(--border-color);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  transition: var(--transition-normal);
}

.step-item.active .step-circle {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 0 16px var(--primary-glow);
}

.step-item.active {
  color: var(--primary);
}

.step-item.completed .step-circle {
  background: var(--success);
  border-color: var(--success);
  color: #ffffff;
}

.step-item.completed {
  color: var(--success);
}

.step-label {
  display: none;
  font-size: 0.78rem;
}

@media (min-width: 640px) {
  .step-label {
    display: block;
    white-space: nowrap;
  }
}

/* Paneles de pasos */
.step-panel {
  display: none;
  animation: fadeIn 0.25s ease-out;
}

.step-panel.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Form controls & select */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.select-wrapper {
  position: relative;
  width: 100%;
}

.cbit-select {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  height: 48px;
  padding: 0 44px 0 1rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--text-primary);
  background-color: var(--bg-card-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  appearance: none;
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition-fast);
}

.cbit-select:focus {
  outline: none;
  border-color: var(--border-color-focus);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.cbit-select option,
.cbit-select optgroup {
  background-color: var(--bg-card);
  color: var(--text-primary);
  padding: 0.5rem;
}

.select-arrow-icon {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--text-muted);
}

/* Tarjetas informativas de tic y respuesta competidora */
.tic-info-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 1.25rem;
}

@media (min-width: 768px) {
  .tic-info-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.info-card {
  background: var(--bg-card-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
}

.info-card-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.85rem;
}

.info-card-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}

.info-card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: rgba(59, 130, 246, 0.15);
  color: var(--primary);
}

.info-card.competing .info-card-icon {
  background: rgba(16, 185, 129, 0.15);
  color: var(--success);
}

.info-card-body {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
}

.instructions-list {
  list-style: none;
  margin-top: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.instructions-list li {
  position: relative;
  padding-left: 1.4rem;
  color: var(--text-secondary);
  font-size: 0.88rem;
}

.instructions-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--success);
  font-weight: 700;
}

/* Termómetro de impulso premonitorio (VAS 0-10) */
.urge-thermometer-box {
  background: var(--bg-card-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  text-align: center;
  margin: 1.5rem 0;
}

.urge-display {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.35rem;
  margin-bottom: 0.75rem;
}

.urge-value {
  font-family: var(--font-mono);
  font-size: 3.2rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}

.urge-max {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  color: var(--text-muted);
}

.urge-label-desc {
  font-weight: 600;
  font-size: 1.05rem;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
}

.range-slider-wrapper {
  position: relative;
  margin-bottom: 1rem;
}

.cbit-range {
  width: 100%;
  height: 10px;
  border-radius: 5px;
  background: linear-gradient(to right, #10b981 0%, #f59e0b 50%, #ef4444 100%);
  outline: none;
  cursor: pointer;
  -webkit-appearance: none;
}

.cbit-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #ffffff;
  border: 3px solid var(--primary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
  cursor: grab;
  transition: transform 0.1s ease;
}

.cbit-range::-webkit-slider-thumb:active {
  cursor: grabbing;
  transform: scale(1.15);
}

.range-ticks {
  display: flex;
  justify-content: space-between;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 0 4px;
}

/* Temporizador circular Canvas a 60 FPS */
.timer-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.5rem 0;
}

.timer-canvas-box {
  position: relative;
  width: 280px;
  height: 280px;
  margin: 0 auto 1.5rem;
}

@media (min-width: 480px) {
  .timer-canvas-box {
    width: 320px;
    height: 320px;
  }
}

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

.timer-center-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  pointer-events: none;
  width: 80%;
}

.timer-seconds-big {
  font-family: var(--font-mono);
  font-size: 3.8rem;
  font-weight: 800;
  line-height: 1;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

.timer-phase-badge {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  background: var(--bg-card-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

.breathing-pacer-text {
  font-size: 0.95rem;
  color: var(--primary);
  font-weight: 600;
  margin-top: 0.35rem;
  min-height: 1.4rem;
}

/* Botones de acción */
.btn-cbit-primary,
.btn-cbit-secondary,
.btn-cbit-outline {
  width: 100%;
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-fast);
  text-decoration: none;
  padding: 0.75rem 1.25rem;
  border: 1px solid transparent;
}

.btn-cbit-primary {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-cbit-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

.btn-cbit-secondary {
  background: var(--bg-card-secondary);
  color: var(--text-primary);
  border-color: var(--border-color);
}

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

.btn-cbit-outline {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border-color);
}

.btn-cbit-outline:hover {
  border-color: var(--text-primary);
  color: var(--text-primary);
}

.actions-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

@media (min-width: 640px) {
  .actions-row.dual {
    grid-template-columns: 1fr 1fr;
  }
  .actions-row.trio {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Comparativa pre vs post */
.comparison-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin: 1.5rem 0;
}

@media (min-width: 640px) {
  .comparison-container {
    grid-template-columns: 1fr 1fr;
  }
}

.comparison-card {
  background: var(--bg-card-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  text-align: center;
}

.comparison-label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.comparison-score {
  font-family: var(--font-mono);
  font-size: 2.8rem;
  font-weight: 800;
}

.comparison-score.pre {
  color: var(--warning);
}

.comparison-score.post {
  color: var(--success);
}

.reduction-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
  background: rgba(16, 185, 129, 0.15);
  color: var(--success);
  font-weight: 700;
  font-size: 0.95rem;
  margin-top: 0.5rem;
}

/* Panel de estadísticas e historial */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat-card {
  background: var(--bg-card-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  text-align: center;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}

.history-table-wrapper {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-card-secondary);
  margin-bottom: 1rem;
}

.history-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  text-align: left;
}

.history-table th,
.history-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
}

.history-table th {
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.history-table td {
  color: var(--text-secondary);
}

.history-empty-state {
  text-align: center;
  padding: 2.5rem 1rem;
  color: var(--text-muted);
}

/* Modales accesibles */
.cbit-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.cbit-modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.cbit-modal-dialog {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-modal);
  width: 100%;
  max-width: 520px;
  padding: 1.75rem;
  transform: scale(0.96);
  transition: transform 0.2s ease;
  max-height: 90vh;
  overflow-y: auto;
}

.cbit-modal-backdrop.open .cbit-modal-dialog {
  transform: scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.modal-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
}

.btn-close-modal {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.cbit-input,
.cbit-textarea {
  width: 100%;
  max-width: 100%;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--text-primary);
  background-color: var(--bg-card-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  outline: none;
  transition: var(--transition-fast);
}

.cbit-input:focus,
.cbit-textarea:focus {
  border-color: var(--border-color-focus);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.cbit-textarea {
  resize: vertical;
  min-height: 80px;
}