/* ==========================================================================
   SUITE FISCAL Y LABORAL - DESIGN SYSTEM (VANILLA CSS)
   Optimizado para Core Web Vitals, Responsive Design y Accesibilidad (A11y)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=JetBrains+Mono:wght@500;600&display=swap');

:root {
  /* Paleta de Colores */
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-primary-light: #eff6ff;
  --color-accent: #10b981;
  --color-accent-hover: #059669;
  --color-accent-light: #ecfdf5;
  --color-danger: #ef4444;
  --color-danger-light: #fef2f2;
  --color-warning: #f59e0b;

  /* Neutros y Superficies (Modo Claro) */
  --bg-page: #f8fafc;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --bg-alt: #f1f5f9;
  --bg-card-hover: #f8fafc;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --border-subtle: #e2e8f0;
  --border-focus: #3b82f6;

  /* Sombras */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

  /* Radios */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 9999px;

  /* Dimensiones */
  --container-max: 1200px;
  --container-narrow: 860px;
  --header-height: 72px;
}

/* ==========================================================================
   TEMA OSCURO (DARK MODE)
   ========================================================================== */
[data-theme="dark"],
html[data-theme="dark"],
body[data-theme="dark"] {
  --bg-page: #0b0f19 !important;
  --bg-surface: #151d2e !important;
  --bg-card: #151d2e !important;
  --bg-alt: #1e293b !important;
  --bg-card-hover: #1c263c !important;
  --text-main: #f8fafc !important;
  --text-muted: #94a3b8 !important;
  --text-light: #64748b !important;
  --border-subtle: #243048 !important;
  --border-focus: #60a5fa !important;

  --color-primary-light: rgba(37, 99, 235, 0.18) !important;
  --color-accent-light: rgba(16, 185, 129, 0.18) !important;
  --color-danger-light: rgba(239, 68, 68, 0.18) !important;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.6), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] body {
  background-color: #0b0f19 !important;
  color: #f8fafc !important;
}

[data-theme="dark"] .site-header {
  background: rgba(15, 23, 42, 0.95) !important;
  border-bottom-color: #243048 !important;
}

[data-theme="dark"] .brand-logo {
  color: #ffffff !important;
}

[data-theme="dark"] .nav-link {
  color: #94a3b8 !important;
}

[data-theme="dark"] .nav-link:hover,
[data-theme="dark"] .nav-link.active {
  color: #60a5fa !important;
}

[data-theme="dark"] .dropdown-menu,
[data-theme="dark"] .mobile-nav-content {
  background: #151d2e !important;
  border-color: #243048 !important;
}

[data-theme="dark"] .dropdown-item:hover {
  background: #1e293b !important;
}

[data-theme="dark"] .dropdown-item-title {
  color: #f8fafc !important;
}

[data-theme="dark"] .dropdown-item-desc {
  color: #94a3b8 !important;
}

[data-theme="dark"] .hero-section {
  background: radial-gradient(circle at 50% 0%, rgba(37, 99, 235, 0.15) 0%, transparent 75%) !important;
  border-bottom-color: #243048 !important;
}

[data-theme="dark"] .hero-title {
  color: #f8fafc !important;
}

[data-theme="dark"] .hero-subtitle {
  color: #94a3b8 !important;
}

[data-theme="dark"] .calc-card,
[data-theme="dark"] .results-panel,
[data-theme="dark"] .tool-card,
[data-theme="dark"] .seo-article,
[data-theme="dark"] .faq-item {
  background: #151d2e !important;
  border-color: #243048 !important;
  color: #f8fafc !important;
}

[data-theme="dark"] .form-label {
  color: #e2e8f0 !important;
}

[data-theme="dark"] .form-help {
  color: #94a3b8 !important;
}

[data-theme="dark"] .form-input,
[data-theme="dark"] .form-select {
  background-color: #0b0f19 !important;
  color: #f8fafc !important;
  border-color: #2e3d5b !important;
}

[data-theme="dark"] .form-input:focus,
[data-theme="dark"] .form-select:focus {
  border-color: #3b82f6 !important;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25) !important;
}

[data-theme="dark"] .input-prefix,
[data-theme="dark"] .input-suffix {
  background-color: #1e293b !important;
  color: #94a3b8 !important;
  border-color: #2e3d5b !important;
}

[data-theme="dark"] .main-result-box {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.2) 0%, rgba(16, 185, 129, 0.2) 100%) !important;
  border-color: rgba(37, 99, 235, 0.4) !important;
}

[data-theme="dark"] .main-result-label {
  color: #94a3b8 !important;
}

[data-theme="dark"] .main-result-value {
  color: #ffffff !important;
}

[data-theme="dark"] .main-result-subtext {
  color: #94a3b8 !important;
}

[data-theme="dark"] .breakdown-item {
  border-bottom-color: #243048 !important;
}

[data-theme="dark"] .breakdown-name {
  color: #cbd5e1 !important;
}

[data-theme="dark"] .data-table {
  border-color: #243048 !important;
}

[data-theme="dark"] .data-table th {
  background-color: #1e293b !important;
  color: #f8fafc !important;
  border-color: #243048 !important;
}

[data-theme="dark"] .data-table td {
  border-color: #243048 !important;
  color: #cbd5e1 !important;
}

[data-theme="dark"] .data-table tr:hover {
  background-color: #1c263c !important;
}

[data-theme="dark"] .btn-outline {
  border-color: #3b82f6 !important;
  color: #60a5fa !important;
  background: transparent !important;
}

[data-theme="dark"] .btn-outline:hover {
  background-color: rgba(59, 130, 246, 0.15) !important;
}

[data-theme="dark"] .faq-question {
  color: #f8fafc !important;
}

[data-theme="dark"] .faq-answer {
  color: #94a3b8 !important;
}

[data-theme="dark"] .search-trigger-btn {
  background-color: #1e293b !important;
  border-color: #243048 !important;
  color: #94a3b8 !important;
}

[data-theme="dark"] .theme-toggle-btn {
  border-color: #243048 !important;
  color: #f8fafc !important;
}

[data-theme="dark"] .theme-toggle-btn:hover {
  background-color: #1e293b !important;
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.6;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-page);
  color: var(--text-main);
  transition: background-color 0.2s ease, color 0.2s ease;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-primary-hover);
}

/* Layout Containers */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* ==========================================================================
   HEADER & NAVEGACIÓN PROFESIONAL RESPONSIVA
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  height: var(--header-height);
  display: flex;
  align-items: center;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--color-primary);
  letter-spacing: -0.02em;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), #3b82f6);
  color: #ffffff;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  box-shadow: 0 4px 10px rgba(30, 58, 138, 0.2);
}

.brand-logo span span {
  color: var(--color-accent);
}

/* Navegación Desktop */
.main-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-muted);
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  text-decoration: none;
  white-space: nowrap;
}

.nav-link:hover, .nav-link.active {
  color: var(--color-primary);
  background-color: var(--color-primary-light);
}

/* Dropdown de Calculadoras */
.nav-dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-toggle {
  cursor: pointer;
  background: none;
  border: none;
  font-family: inherit;
}

.dropdown-arrow {
  font-size: 0.65rem;
  transition: transform 0.2s ease;
  margin-left: 0.2rem;
}

.nav-dropdown:hover .dropdown-arrow,
.nav-dropdown.open .dropdown-arrow {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 0.5rem;
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  width: 320px;
  padding: 0.75rem;
  display: none !important;
  flex-direction: column;
  gap: 0.25rem;
  z-index: 999;
}

.nav-dropdown:hover .dropdown-menu,
.nav-dropdown.open .dropdown-menu {
  display: flex !important;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.75rem;
  border-radius: var(--radius-md);
  color: var(--text-main);
  text-decoration: none;
  transition: all 0.15s ease;
}

.dropdown-item:hover {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

.dropdown-item-icon {
  font-size: 1.2rem;
  flex-shrink: 0;
}

.dropdown-item-info {
  display: flex;
  flex-direction: column;
}

.dropdown-item-title {
  font-weight: 700;
  font-size: 0.875rem;
  line-height: 1.2;
}

.dropdown-item-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

/* CTA Header */
.nav-cta {
  background-color: var(--color-primary);
  color: #ffffff !important;
  padding: 0.55rem 1.15rem;
  border-radius: var(--radius-pill);
  font-size: 0.875rem;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
  margin-left: 0.5rem;
  white-space: nowrap;
}

.nav-cta:hover {
  background-color: var(--color-primary-hover);
  transform: translateY(-1px);
}

/* Botón Hamburguesa Móvil */
.mobile-menu-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.5rem 0.65rem;
  cursor: pointer;
  color: var(--text-main);
  font-size: 1.25rem;
  line-height: 1;
  transition: all 0.2s ease;
}

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

/* Menú Drawer Móvil */
.mobile-nav-drawer {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 999;
  display: none !important;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.mobile-nav-drawer.open {
  display: block !important;
  opacity: 1;
}

.mobile-nav-content {
  background: #ffffff;
  border-bottom: 1px solid var(--border-subtle);
  padding: 1.25rem 1.5rem 2rem;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.mobile-nav-section-title {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-light);
  margin-top: 0.5rem;
  margin-bottom: 0.25rem;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  background-color: var(--bg-page);
  color: var(--text-main);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid var(--border-subtle);
  transition: all 0.15s ease;
}

.mobile-nav-link:hover, .mobile-nav-link.active {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Media Query: Móviles y Tablets (< 992px) */
@media (max-width: 992px) {
  .main-nav {
    display: none !important;
  }
  .mobile-menu-btn {
    display: flex !important;
    align-items: center;
    justify-content: center;
  }
}

/* ==========================================================================
   Botones de Compartir e Imprimir Resultados
   ========================================================================== */
.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px dashed var(--border-subtle);
}

.btn-share {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s ease;
  text-decoration: none;
  font-family: inherit;
}

.btn-share-wa {
  background-color: #25d366;
  color: #ffffff;
}

.btn-share-wa:hover {
  background-color: #128c7e;
  transform: translateY(-1px);
  color: #ffffff;
}

.btn-share-link {
  background-color: var(--bg-page);
  color: var(--text-main);
  border-color: var(--border-subtle);
}

.btn-share-link:hover {
  background-color: #e2e8f0;
  border-color: var(--text-light);
  transform: translateY(-1px);
}

.btn-share-print {
  background-color: var(--bg-page);
  color: var(--text-main);
  border-color: var(--border-subtle);
}

.btn-share-print:hover {
  background-color: #e2e8f0;
  border-color: var(--text-light);
  transform: translateY(-1px);
}

/* Toast de Enlace Copiado */
.toast-notice {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background-color: #0f172a;
  color: #ffffff;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  z-index: 10000;
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.toast-notice.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ==========================================================================
   Estilos de Impresión / PDF Limpio
   ========================================================================== */
@media print {
  body {
    background: #ffffff !important;
    color: #000000 !important;
    font-size: 12pt;
  }

  .site-header,
  .site-footer,
  .nav-dropdown,
  .mobile-menu-btn,
  .mobile-nav-drawer,
  .result-actions,
  .ad-slot,
  .seo-article,
  .faq-section,
  .hero-section {
    display: none !important;
  }

  .calc-layout {
    grid-template-columns: 1fr !important;
    gap: 1rem !important;
  }

  .calc-card, .calc-result-card {
    border: 1px solid #ccc !important;
    box-shadow: none !important;
    padding: 1.5rem !important;
    page-break-inside: avoid;
  }
}

/* ==========================================================================
   HERO SECTIONS
   ========================================================================== */
.hero-section {
  padding: 3.5rem 0 2.5rem;
  text-align: center;
  background: linear-gradient(180deg, #ffffff 0%, var(--bg-page) 100%);
  border-bottom: 1px solid var(--border-subtle);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--color-accent-light);
  color: var(--color-accent);
  font-size: 0.825rem;
  font-weight: 700;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-pill);
  margin-bottom: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 1px solid rgba(5, 150, 105, 0.2);
}

.hero-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-main);
  margin-bottom: 1rem;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--text-muted);
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

/* Breadcrumbs (SEO Clave) */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.breadcrumbs a {
  color: var(--text-light);
}

.breadcrumbs a:hover {
  color: var(--color-primary);
}

.breadcrumbs-separator {
  color: var(--border-subtle);
}

.breadcrumbs .current {
  color: var(--text-main);
  font-weight: 600;
}

/* ==========================================================================
   GRID DE HERRAMIENTAS (HOME HUB)
   ========================================================================== */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 3rem 0;
}

.tool-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.tool-card:hover {
  transform: translateY(-4px);
  border-color: #cbd5e1;
  box-shadow: var(--shadow-lg);
}

.tool-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
}

.icon-blue { background-color: var(--color-primary-light); color: var(--color-primary); }
.icon-emerald { background-color: var(--color-accent-light); color: var(--color-accent); }
.icon-amber { background-color: var(--color-warning-light); color: var(--color-warning); }
.icon-rose { background-color: var(--color-danger-light); color: var(--color-danger); }

.tool-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.tool-card-desc {
  font-size: 0.925rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.tool-card-badge {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  background-color: var(--bg-alt);
  color: var(--text-light);
}

.tool-card-action {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--color-primary);
}

.tool-card:hover .tool-card-action {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

/* ==========================================================================
   ESTRUCTURA DE HERRAMIENTAS / CALCULADORAS
   ========================================================================== */
.calculator-app {
  margin: 2rem 0 4rem;
}

.calculator-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2rem;
  align-items: start;
}

@media (max-width: 960px) {
  .calculator-layout {
    grid-template-columns: 1fr;
  }
}

.calc-panel {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
}

.calc-panel-header {
  margin-bottom: 1.75rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-subtle);
}

.calc-panel-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Form Controls */
.form-group {
  margin-bottom: 1.25rem;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.4rem;
}

.form-help {
  font-size: 0.775rem;
  color: var(--text-light);
  margin-top: 0.25rem;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-prefix, .input-suffix {
  position: absolute;
  color: var(--text-light);
  font-weight: 600;
  font-size: 0.9rem;
  pointer-events: none;
}

.input-prefix { left: 1rem; }
.input-suffix { right: 1rem; }

.form-input, .form-select, .form-textarea {
  width: 100%;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  padding: 0.75rem 1rem;
  color: var(--text-main);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
  outline: none;
}

.input-has-prefix { padding-left: 2.25rem; }
.input-has-suffix { padding-right: 2.25rem; }

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.radio-group-segmented {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
  gap: 0.5rem;
  background-color: var(--bg-alt);
  padding: 0.35rem;
  border-radius: var(--radius-md);
}

.radio-segmented-label {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

.radio-group-segmented input[type="radio"] {
  display: none;
}

.radio-group-segmented input[type="radio"]:checked + .radio-segmented-label {
  background-color: var(--bg-surface);
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

/* Botones */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s ease;
  text-align: center;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

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

.btn-accent {
  background-color: var(--color-accent);
  color: #ffffff;
}

.btn-accent:hover {
  background-color: var(--color-accent-hover);
  color: #ffffff;
}

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

.btn-outline:hover {
  background-color: var(--bg-alt);
  border-color: #cbd5e1;
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.85rem;
}

.btn-block {
  width: 100%;
}

/* Panel de Resultados */
.results-panel {
  background: linear-gradient(180deg, #ffffff 0%, var(--color-primary-light) 100%);
  border: 1px solid rgba(30, 58, 138, 0.15);
  border-radius: var(--radius-lg);
  padding: 2rem;
  position: sticky;
  top: calc(var(--header-height) + 1.5rem);
  box-shadow: var(--shadow-lg);
}

.main-result-box {
  background-color: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.main-result-label {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-light);
  margin-bottom: 0.25rem;
}

.main-result-value {
  font-family: var(--font-mono);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.2;
}

.main-result-subtext {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.breakdown-list {
  list-style: none;
  margin-bottom: 1.5rem;
}

.breakdown-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  font-size: 0.925rem;
}

.breakdown-item:last-child {
  border-bottom: none;
}

.breakdown-name {
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.breakdown-value {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text-main);
}

.breakdown-value.negative { color: var(--color-danger); }
.breakdown-value.positive { color: var(--color-accent); }

/* Barra visual de Desglose */
.bar-chart-visual {
  height: 14px;
  border-radius: var(--radius-pill);
  display: flex;
  overflow: hidden;
  background-color: var(--bg-alt);
  margin-bottom: 1.5rem;
}

.bar-segment-net { background-color: var(--color-accent); height: 100%; transition: width 0.3s ease; }
.bar-segment-tax { background-color: var(--color-danger); height: 100%; transition: width 0.3s ease; }
.bar-segment-ss  { background-color: var(--color-warning); height: 100%; transition: width 0.3s ease; }

.chart-legend {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-net { background-color: var(--color-accent); }
.dot-tax { background-color: var(--color-danger); }
.dot-ss { background-color: var(--color-warning); }

/* ==========================================================================
   ESPACIOS DE MONETIZACIÓN (PUBLICIDAD & AFILIACIÓN)
   ========================================================================== */
.ad-slot {
  background-color: #fafafa;
  border: 1px dashed var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
  margin: 2rem 0;
  text-align: center;
  position: relative;
  min-height: 90px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.ad-label {
  position: absolute;
  top: 4px;
  right: 8px;
  font-size: 0.65rem;
  color: #94a3b8;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.affiliate-card {
  background: linear-gradient(135deg, #1e3a8a 0%, #1e1b4b 100%);
  color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin: 2.5rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  box-shadow: var(--shadow-lg);
}

.affiliate-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.35rem;
  color: #ffffff;
}

.affiliate-card p {
  font-size: 0.9rem;
  color: #cbd5e1;
  max-width: 550px;
}

.affiliate-btn {
  background-color: var(--color-accent);
  color: #ffffff;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 0.9rem;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(5, 150, 105, 0.3);
}

.affiliate-btn:hover {
  background-color: var(--color-accent-hover);
  color: #ffffff;
  transform: scale(1.02);
}

@media (max-width: 768px) {
  .affiliate-card {
    flex-direction: column;
    text-align: center;
  }
}

/* ==========================================================================
   CONTENIDO EDUCATIVO & SEO ON-PAGE (Artículos + FAQs)
   ========================================================================== */
.seo-article {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  margin: 3rem 0;
  box-shadow: var(--shadow-sm);
}

.seo-article h2 {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-main);
  margin-top: 2rem;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.seo-article h2:first-child {
  margin-top: 0;
}

.seo-article h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

.seo-article p {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: 1.25rem;
}

.seo-article ul, .seo-article ol {
  margin-left: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--text-muted);
}

.seo-article li {
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

/* Tablas oficiales SEO */
.table-responsive {
  overflow-x: auto;
  margin: 1.5rem 0;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.925rem;
}

.data-table th {
  background-color: var(--bg-alt);
  color: var(--text-main);
  font-weight: 700;
  padding: 0.85rem 1rem;
  border-bottom: 2px solid var(--border-subtle);
}

.data-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-muted);
}

.data-table tr:hover td {
  background-color: #f8fafc;
}

/* Acordeón FAQ (Google Snippets SEO) */
.faq-section {
  margin: 3rem 0;
}

.faq-title {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 1.5rem;
  text-align: center;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

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

.faq-question {
  width: 100%;
  padding: 1.25rem 1.5rem;
  text-align: left;
  background: none;
  border: none;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.faq-question:hover {
  color: var(--color-primary);
}

.faq-icon {
  transition: transform 0.25s ease;
  font-size: 1.2rem;
  color: var(--text-light);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--color-primary);
}

.faq-answer {
  padding: 0 1.5rem 1.25rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  display: none;
}

.faq-item.active .faq-answer {
  display: block;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
/* ==========================================================================
   FOOTER MODERNO Y RESPONSIVO
   ========================================================================== */
.site-footer {
  background-color: #0b0f19;
  color: #94a3b8;
  padding: 4rem 0 2.5rem;
  margin-top: auto;
  border-top: 1px solid #1e293b;
  font-family: inherit;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1.2fr 1fr 1fr;
  gap: 2.5rem 2rem;
  margin-bottom: 3rem;
}

@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem 2rem;
  }
}

@media (max-width: 580px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.footer-brand .brand-logo {
  color: #ffffff !important;
  margin-bottom: 1rem;
}

.footer-brand p {
  color: #94a3b8;
  font-size: 0.875rem;
  line-height: 1.65;
  max-width: 320px;
}

.footer-col h4 {
  color: #ffffff;
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding: 0;
  margin: 0;
}

.footer-links a {
  color: #94a3b8;
  font-size: 0.875rem;
  text-decoration: none;
  transition: color 0.15s ease, transform 0.15s ease;
  display: inline-block;
}

.footer-links a:hover {
  color: #60a5fa;
  transform: translateX(3px);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid #1e293b;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.825rem;
  color: #64748b;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ==========================================================================
   Botón Interruptor de Tema (Dark / Light Mode)
   ========================================================================== */
.theme-toggle-btn {
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  padding: 0.45rem 0.65rem;
  font-size: 1rem;
  cursor: pointer;
  color: var(--text-main);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.theme-toggle-btn:hover {
  background-color: var(--bg-alt);
  border-color: var(--color-primary);
  transform: scale(1.05);
}

/* ==========================================================================
   Buscador Rápido en Vivo (Quick Search Modal)
   ========================================================================== */
.search-trigger-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--bg-alt);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  padding: 0.45rem 0.85rem;
  font-size: 0.825rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

.search-trigger-btn:hover {
  border-color: var(--color-primary);
  color: var(--text-main);
  background-color: var(--bg-card);
}

.search-shortcut-badge {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 700;
}

/* Modal de Búsqueda */
.search-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 10000;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 4rem 1rem 1rem;
}

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

.search-modal {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 600px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  animation: modalScaleUp 0.15s ease;
}

@keyframes modalScaleUp {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

.search-input-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
}

.search-input-wrap span {
  font-size: 1.25rem;
}

.search-input-field {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 1.05rem;
  color: var(--text-main);
  outline: none;
  font-family: inherit;
}

.search-results-list {
  max-height: 380px;
  overflow-y: auto;
  padding: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.search-result-item {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-main);
  transition: all 0.15s ease;
}

.search-result-item:hover, .search-result-item.active {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

.search-result-icon {
  font-size: 1.35rem;
  flex-shrink: 0;
}

.search-result-info {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.search-result-title {
  font-weight: 700;
  font-size: 0.95rem;
}

.search-result-desc {
  font-size: 0.775rem;
  color: var(--text-muted);
}

.search-modal-footer {
  padding: 0.65rem 1.25rem;
  background-color: var(--bg-alt);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
}