/* ==========================================================================
   Calculadora de Carta de Smith - Fijate Tools
   Hoja de estilos canónicos responsive y temas claro / oscuro
   ========================================================================== */

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

  /* Tema oscuro por defecto */
  --color-bg: #070d1e;
  --color-surface: #0f172a;
  --color-surface-card: #131d36;
  --color-surface-hover: #1e293b;
  --color-border: #1e293b;
  --color-border-subtle: #1a233d;
  --color-border-focus: #38bdf8;

  --color-text-main: #f8fafc;
  --color-text-secondary: #94a3b8;
  --color-text-muted: #64748b;

  --color-primary: #38bdf8;
  --color-primary-hover: #0ea5e9;
  --color-primary-glow: rgba(56, 189, 248, 0.25);

  --color-accent-amber: #f59e0b;
  --color-accent-amber-bg: rgba(245, 158, 11, 0.12);
  --color-accent-emerald: #10b981;
  --color-accent-emerald-bg: rgba(16, 185, 129, 0.12);
  --color-accent-rose: #f43f5e;
  --color-accent-rose-bg: rgba(244, 63, 94, 0.12);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.25);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.3);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

[data-theme="light"] {
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-card: #f1f5f9;
  --color-surface-hover: #e2e8f0;
  --color-border: #cbd5e1;
  --color-border-subtle: #e2e8f0;
  --color-border-focus: #0284c7;

  --color-text-main: #0f172a;
  --color-text-secondary: #475569;
  --color-text-muted: #64748b;

  --color-primary: #0284c7;
  --color-primary-hover: #0369a1;
  --color-primary-glow: rgba(2, 132, 199, 0.18);

  --color-accent-amber: #d97706;
  --color-accent-amber-bg: rgba(217, 119, 6, 0.12);
  --color-accent-emerald: #059669;
  --color-accent-emerald-bg: rgba(5, 150, 105, 0.12);
  --color-accent-rose: #e11d48;
  --color-accent-rose-bg: rgba(225, 29, 72, 0.12);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.06);
}

/* ==========================================================================
   Estructura Global
   ========================================================================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

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

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

.tool-with-sidebar {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  width: 100%;
}

.tool-main-content {
  flex: 1 1 0%;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

/* ==========================================================================
   Banner de Introducción y Badges
   ========================================================================== */

.card-intro {
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.intro-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-primary-glow);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-full);
  padding: 0.3rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 600;
  width: fit-content;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--color-primary);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--color-primary);
  animation: pulseAnimation 2s infinite ease-in-out;
}

@keyframes pulseAnimation {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.6; }
}

.intro-text {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.intro-text strong {
  color: var(--color-text-main);
}

/* ==========================================================================
   Estudio de la Carta de Smith (Workspace 2 Columnas)
   ========================================================================== */

.smith-workspace-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 980px) {
  .smith-workspace-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }
}

/* Tarjeta del Visor Canvas */
.card-canvas-studio {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.canvas-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border-subtle);
}

.canvas-title-group {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.canvas-icon-box {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-md);
  background: var(--color-primary-glow);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.canvas-title {
  font-family: var(--font-title);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-main);
}

/* Barra de toggles visuales sobre el canvas */
.canvas-layer-toggles {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.toggle-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-surface-hover);
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  user-select: none;
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.toggle-chip:hover {
  color: var(--color-text-main);
  border-color: var(--color-border-focus);
}

.toggle-chip input[type="checkbox"] {
  accent-color: var(--color-primary);
  cursor: pointer;
}

/* Contenedor del Canvas */
.smith-canvas-wrapper {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  padding: 0.5rem;
  overflow: hidden;
}

#smithCanvas {
  display: block;
  max-width: 100%;
  height: auto;
  cursor: crosshair;
  touch-action: none;
}

/* HUD de coordenadas flotante en el pie del canvas */
.canvas-hud-footer {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.hud-pill {
  background: var(--color-surface-card);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-subtle);
  color: var(--color-text-secondary);
}

/* ==========================================================================
   Panel de Controles e Inputs
   ========================================================================== */

.card-controls-studio {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.controls-heading {
  font-family: var(--font-title);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-main);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--color-border-subtle);
}

.form-group-block {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.form-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-main);
}

.form-label-hint {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--color-primary);
}

/* Wrappers de inputs con unidades */
.input-suffix-wrapper {
  display: flex;
  align-items: center;
  background: var(--color-surface-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
  min-height: 42px;
}

.input-suffix-wrapper:focus-within {
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 2px var(--color-primary-glow);
}

.input-suffix-wrapper input[type="number"],
.input-suffix-wrapper input[type="text"] {
  flex: 1 1 0%;
  width: 0;
  min-width: 0;
  height: 40px;
  background: transparent;
  border: none;
  outline: none;
  padding: 0 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--color-text-main);
}

.input-suffix-unit {
  padding: 0 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-surface-hover);
  height: 100%;
  display: flex;
  align-items: center;
  border-left: 1px solid var(--color-border-subtle);
}

/* Sliders tácticiles modernos */
.range-slider-row {
  width: 100%;
  margin-top: -0.25rem;
}

.range-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--color-surface-hover);
  outline: none;
  transition: background var(--transition-fast);
  cursor: pointer;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  box-shadow: 0 0 6px var(--color-primary-glow);
  transition: transform var(--transition-fast);
}

.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.range-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  border: none;
  box-shadow: 0 0 6px var(--color-primary-glow);
}

/* Fila de frecuencia con selector de unidad */
.freq-input-row {
  display: flex;
  gap: 0.5rem;
}

.freq-input-row .input-suffix-wrapper {
  flex: 2 1 0%;
}

.select-unit-wrapper {
  flex: 1 1 0%;
  position: relative;
  min-height: 42px;
}

.select-unit-wrapper select {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  height: 42px;
  padding: 0 34px 0 0.85rem;
  background-color: var(--color-surface-card);
  color: var(--color-text-main);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  outline: none;
  appearance: none;
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
}

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

/* Opciones de los selects para evitar fondos transparentes */
.select-unit-wrapper select option {
  background-color: var(--color-surface);
  color: var(--color-text-main);
  padding: 8px;
}

/* Botones rápidos de frecuencias */
.freq-presets-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.btn-freq-preset {
  background: var(--color-surface-hover);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.3rem 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-freq-preset:hover,
.btn-freq-preset.is-active {
  background: var(--color-primary-glow);
  color: var(--color-primary);
  border-color: var(--color-primary);
}

/* Barra de acciones de controles */
.controls-actions-bar {
  display: flex;
  gap: 0.75rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--color-border-subtle);
}

.btn-control-action {
  flex: 1 1 0%;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.btn-control-reset {
  background: var(--color-surface-hover);
  color: var(--color-text-secondary);
  border-color: var(--color-border);
}

.btn-control-reset:hover {
  background: var(--color-border);
  color: var(--color-text-main);
}

.btn-control-share {
  background: var(--color-primary);
  color: #ffffff;
}

.btn-control-share:hover {
  background: var(--color-primary-hover);
  box-shadow: 0 0 10px var(--color-primary-glow);
}

/* ==========================================================================
   Presets de Cargas de Antenas y Telecomunicaciones
   ========================================================================== */

.card-presets-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.presets-title {
  font-family: var(--font-title);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-main);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.presets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.6rem;
}

.btn-preset {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.2rem;
  background: var(--color-surface-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: 0.6rem 0.75rem;
  cursor: pointer;
  text-align: left;
  transition: all var(--transition-fast);
  min-height: 40px;
}

.btn-preset:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-border-focus);
}

.btn-preset.is-active {
  background: var(--color-primary-glow);
  border-color: var(--color-primary);
}

.btn-preset-name {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-main);
}

.btn-preset-val {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-primary);
}

/* ==========================================================================
   Rejilla de Métricas Principales (KPI Cards)
   ========================================================================== */

.metrics-kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.kpi-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.2rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  position: relative;
  overflow: hidden;
}

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

.kpi-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.kpi-value {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text-main);
  line-height: 1.2;
}

.kpi-caption {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

/* Badges de calidad según ROE */
.metric-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  width: fit-content;
}

.badge-excellent {
  background: var(--color-accent-emerald-bg);
  color: var(--color-accent-emerald);
  border: 1px solid var(--color-accent-emerald);
}

.badge-good {
  background: var(--color-primary-glow);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.badge-acceptable {
  background: var(--color-accent-amber-bg);
  color: var(--color-accent-amber);
  border: 1px solid var(--color-accent-amber);
}

.badge-warning,
.badge-poor {
  background: var(--color-accent-rose-bg);
  color: var(--color-accent-rose);
  border: 1px solid var(--color-accent-rose);
}

/* ==========================================================================
   Diseñador de Redes de Adaptación en L (L-Match Solver)
   ========================================================================== */

.card-lmatch-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.lmatch-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border-subtle);
}

.lmatch-title-group {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.lmatch-icon-box {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--color-accent-emerald-bg);
  color: var(--color-accent-emerald);
  display: flex;
  align-items: center;
  justify-content: center;
}

.lmatch-heading {
  font-family: var(--font-title);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text-main);
}

.lmatch-desc {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
}

.lmatch-solutions-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 768px) {
  .lmatch-solutions-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.lmatch-card {
  background: var(--color-surface-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  transition: border-color var(--transition-fast);
}

.lmatch-card:hover {
  border-color: var(--color-border-focus);
}

.lmatch-card-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.lmatch-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  background: var(--color-primary-glow);
  color: var(--color-primary);
  border-radius: var(--radius-sm);
}

.lmatch-title {
  font-family: var(--font-title);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text-main);
}

.lmatch-elements-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
}

.element-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.element-type-tag {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
}

.element-symbol-val {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
}

.element-symbol {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
}

.element-val {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-main);
}

.lmatch-footer-meta {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  padding-top: 0.5rem;
  border-top: 1px dashed var(--color-border-subtle);
}

.lmatch-footer-meta strong {
  color: var(--color-text-secondary);
}

.lmatch-matched-banner {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 1rem;
  background: var(--color-accent-emerald-bg);
  border: 1px solid var(--color-accent-emerald);
  border-radius: var(--radius-md);
  color: var(--color-accent-emerald);
  font-size: 0.9rem;
  font-weight: 600;
}

/* ==========================================================================
   Guía Técnica y Educativa Canónica
   ========================================================================== */

.card-guide-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.guide-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border-subtle);
}

.guide-icon-box {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--color-primary-glow);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.guide-title {
  font-family: var(--font-title);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-text-main);
}

.guide-grid-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 768px) {
  .guide-grid-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.guide-card {
  background: var(--color-surface-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.guide-card-title {
  font-family: var(--font-title);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text-main);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.guide-card-text {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.formula-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-primary);
  margin-top: 0.3rem;
  overflow-x: auto;
}

/* Preguntas Frecuentes (FAQ Accordion) */
.faq-section {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.faq-title {
  font-family: var(--font-title);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-main);
}

.faq-item {
  background: var(--color-surface-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item[open] {
  border-color: var(--color-border-focus);
}

.faq-question {
  width: 100%;
  padding: 1rem;
  background: transparent;
  border: none;
  text-align: left;
  font-family: var(--font-title);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  list-style: none;
  user-select: none;
}

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

.faq-question::after {
  content: '';
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
  transform: rotate(45deg);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
  margin-right: 4px;
}

.faq-item[open] .faq-question::after {
  transform: rotate(-135deg);
}

.faq-answer {
  padding: 0 1rem 1rem;
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   Modales Canónicos (Cero window.alert)
   ========================================================================== */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal-backdrop.is-open {
  display: flex;
}

.modal-dialog {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  width: 100%;
  max-width: 540px;
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  animation: modalFadeIn 0.2s ease-out;
}

@keyframes modalFadeIn {
  from { opacity: 0; transform: translateY(12px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

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

.modal-title {
  font-family: var(--font-title);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-main);
}

.btn-modal-close {
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 0.4rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition-fast);
}

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

.modal-body {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.share-url-box {
  display: flex;
  gap: 0.5rem;
}

.share-url-input {
  flex: 1 1 0%;
  width: 0;
  min-width: 0;
  height: 42px;
  background: var(--color-surface-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-text-main);
}

.btn-modal-primary {
  min-height: 42px;
  padding: 0 1.25rem;
  background: var(--color-primary);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  transition: background var(--transition-fast);
}

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

.btn-modal-primary.btn-success {
  background: var(--color-accent-emerald);
}

/* ==========================================================================
   Adaptación Móvil y Responsive
   ========================================================================== */

@media (max-width: 640px) {
  .tool-layout {
    margin-top: 1rem;
    padding: 0 0.75rem;
  }

  .canvas-header-bar {
    flex-direction: column;
    align-items: flex-start;
  }

  .canvas-layer-toggles {
    width: 100%;
    justify-content: flex-start;
  }

  .metrics-kpi-grid {
    grid-template-columns: 1fr;
  }

  .lmatch-elements-grid {
    grid-template-columns: 1fr;
  }

  .share-url-box {
    flex-direction: column;
  }

  .btn-modal-primary {
    width: 100%;
  }
}