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

  /* Colores Corporativos Tema Claro */
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-subtle: #f1f5f9;
  --border-color: #e2e8f0;
  --border-focus: #3b82f6;

  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-heading: #1e293b;

  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-subtle: #eff6ff;

  --success: #16a34a;
  --success-subtle: #f0fdf4;
  --success-border: #bbf7d0;

  --warning: #d97706;
  --warning-subtle: #fffbeb;
  --warning-border: #fde68a;

  --danger: #dc2626;
  --danger-subtle: #fef2f2;
  --danger-border: #fecaca;

  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.07);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
}

[data-theme="dark"] {
  --bg-page: #0b0f17;
  --bg-card: #131b26;
  --bg-card-subtle: #1c2635;
  --border-color: #243042;
  --border-focus: #60a5fa;

  --text-main: #e2e8f0;
  --text-muted: #94a3b8;
  --text-heading: #f8fafc;

  --primary: #3b82f6;
  --primary-hover: #60a5fa;
  --primary-subtle: rgba(59, 130, 246, 0.15);

  --success: #22c55e;
  --success-subtle: rgba(34, 197, 94, 0.15);
  --success-border: rgba(34, 197, 94, 0.3);

  --warning: #f59e0b;
  --warning-subtle: rgba(245, 158, 11, 0.15);
  --warning-border: rgba(245, 158, 11, 0.3);

  --danger: #ef4444;
  --danger-subtle: rgba(239, 68, 68, 0.15);
  --danger-border: rgba(239, 68, 68, 0.3);

  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.5);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.5);
}

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

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

h1, h2, h3, h4, h5, h6,
.brand-title,
.hero-heading,
.panel-title,
.modal-title,
.faq-section-title {
  font-family: var(--font-heading);
  color: var(--text-heading);
  line-height: 1.25;
}

.mono, code {
  font-family: var(--font-mono);
}

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

/* Hero */
.hero-banner {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  background: var(--primary-subtle);
  border-radius: 9999px;
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 0.85rem;
}

.pulse-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--primary);
  box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.7);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(37, 99, 235, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(37, 99, 235, 0); }
}

.hero-heading {
  font-size: 1.65rem;
  margin: 0 0 0.65rem;
}

.hero-subtext {
  font-size: 1rem;
  line-height: 1.55;
  color: var(--text-muted);
  margin: 0;
}

/* Pestañas de Navegación */
.nav-tabs-wrapper {
  margin-bottom: 1.5rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.nav-tabs-wrapper::-webkit-scrollbar {
  display: none;
}

.nav-tabs {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
  min-width: max-content;
}

.tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  min-height: 40px;
}

.tab-btn:hover {
  background: var(--bg-card-subtle);
  color: var(--text-main);
}

.tab-btn.active {
  background: var(--bg-card);
  border-color: var(--border-color);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

/* Paneles de Pestaña */
.tab-panel {
  display: none;
  animation: fadeIn 0.2s ease-in-out;
}

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

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(3px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Tarjeta Buscador */
.search-box-card,
.detector-card,
.comparator-card,
.calculator-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.search-main-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
  margin-bottom: 1.25rem;
}

.form-control,
.form-select {
  width: 100%;
  min-height: 42px;
  padding: 0.65rem 0.85rem;
  font-family: var(--font-main);
  font-size: 0.95rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background-color: var(--bg-card);
  color: var(--text-main);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control:focus,
.form-select:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--primary-subtle);
}

.search-input {
  font-size: 1.05rem;
  padding-right: 2.5rem;
}

.btn-clear {
  position: absolute;
  right: 0.75rem;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.25rem;
  line-height: 1;
}

.filters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: 0.35rem;
}

.form-select {
  appearance: none;
  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='%2364748b' 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 0.75rem center;
  background-size: 16px;
  padding-right: 2.5rem;
  cursor: pointer;
}

[data-theme="dark"] .form-select {
  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");
}

/* Quick Chips */
.quick-chips-wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border-color);
}

.chips-label {
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--text-muted);
}

.chip-btn {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  padding: 0.35rem 0.75rem;
  font-size: 0.825rem;
  font-weight: 500;
  color: var(--text-main);
  cursor: pointer;
  transition: all 0.15s ease;
  min-height: 32px;
}

.chip-btn:hover {
  background: var(--primary-subtle);
  border-color: var(--primary);
  color: var(--primary);
}

/* Resultados */
.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.results-count {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-heading);
}

.verified-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.75rem;
  background: var(--success-subtle);
  border: 1px solid var(--success-border);
  color: var(--success);
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 600;
}

/* Grid de Tarjetas */
.titles-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 340px), 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.title-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.title-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-focus);
  box-shadow: var(--shadow-md);
}

.card-top-tags {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.65rem;
}

.ruct-code-badge {
  font-family: var(--font-mono);
  font-size: 0.775rem;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-subtle);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
}

.level-badge {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-card-subtle);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
}

.card-title-text {
  font-size: 1.05rem;
  margin: 0 0 0.5rem;
  color: var(--text-heading);
  line-height: 1.35;
}

.card-uni-name {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.card-attributes-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
  font-size: 0.825rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  color: var(--text-muted);
  flex-grow: 1;
}

.card-attributes-list li {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.card-attributes-list li svg {
  flex-shrink: 0;
}

.status-pill-ok {
  color: var(--success);
  font-weight: 600;
}

.status-pill-reg {
  color: var(--warning);
  font-weight: 600;
}

.card-actions-row {
  display: flex;
  gap: 0.5rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border-color);
  margin-top: auto;
}

.btn-card-detail {
  flex: 1 1 0%;
  min-height: 38px;
  background: var(--primary-subtle);
  color: var(--primary);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
}

.btn-card-detail:hover {
  background: var(--primary);
  color: #ffffff;
}

/* Paginación */
.pagination-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-top: 1.5rem;
}

.btn-page {
  padding: 0.5rem 1rem;
  min-height: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-page:hover:not(:disabled) {
  border-color: var(--primary);
  color: var(--primary);
}

.btn-page:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.page-text {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Detector de Sospecha */
.card-heading-box {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.alert-icon-circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--warning-subtle);
  color: var(--warning);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.panel-title {
  font-size: 1.25rem;
  margin: 0 0 0.35rem;
}

.panel-subtitle {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0;
}

.detector-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  min-height: 42px;
  background-color: var(--primary);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.15s ease;
}

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

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.25rem;
  min-height: 42px;
  background-color: var(--bg-card-subtle);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

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

.detector-result-container {
  margin-top: 1.5rem;
  padding: 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-card-subtle);
}

.detector-alert-card {
  padding: 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.75rem;
}

.detector-alert-card.critica {
  background: var(--danger-subtle);
  border-left: 4px solid var(--danger);
  color: var(--danger);
}

.detector-alert-card.moderada {
  background: var(--warning-subtle);
  border-left: 4px solid var(--warning);
  color: var(--warning);
}

.detector-alert-card.aviso {
  background: var(--primary-subtle);
  border-left: 4px solid var(--primary);
  color: var(--primary);
}

.detector-alert-title {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 0.25rem;
}

.detector-alert-desc {
  font-size: 0.875rem;
  line-height: 1.45;
  color: var(--text-main);
}

/* Tablas SEO Comparativas */
.seo-table-wrapper {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin-top: 1rem;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.comparison-table th,
.comparison-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
  background: var(--bg-card-subtle);
  color: var(--text-heading);
  font-weight: 700;
}

.badge-tag {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
}

.badge-tag.green {
  background: var(--success-subtle);
  color: var(--success);
}

.badge-tag.red {
  background: var(--danger-subtle);
  color: var(--danger);
}

.badge-tag.gray {
  background: var(--bg-card-subtle);
  color: var(--text-muted);
}

/* Simulador Oposiciones */
.calc-form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.calc-results-display {
  background: var(--bg-card-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  border: 1px solid var(--border-color);
}

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

.kpi-card {
  background: var(--bg-card);
  padding: 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.kpi-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 0.25rem;
}

.kpi-val {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 800;
  line-height: 1;
}

.kpi-val.green { color: var(--success); }
.kpi-val.red { color: var(--danger); }

/* FAQ Acordeón */
.faq-guide-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
}

.faq-section-title {
  font-size: 1.35rem;
  margin: 0 0 1.25rem;
}

.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-card);
}

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

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

.faq-arrow {
  transition: transform 0.2s ease;
  color: var(--text-muted);
}

.faq-item[open] .faq-arrow {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 1rem 1rem;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-muted);
}

.faq-answer p {
  margin: 0;
}

/* Modal Accesible */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal-dialog {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  max-width: 650px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: modalIn 0.2s ease;
}

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

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

.modal-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-subtle);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-bottom: 0.35rem;
}

.modal-title {
  font-size: 1.25rem;
  margin: 0;
}

.btn-close-modal {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
  padding: 0.25rem;
}

.modal-body {
  padding: 1.5rem;
  font-size: 0.95rem;
  line-height: 1.55;
}

.modal-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.modal-info-item {
  background: var(--bg-card-subtle);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
}

.modal-info-label {
  font-size: 0.775rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 0.2rem;
}

.modal-info-value {
  font-weight: 600;
  color: var(--text-heading);
}

.modal-section-title {
  font-size: 1rem;
  font-weight: 700;
  margin: 1.25rem 0 0.5rem;
  color: var(--text-heading);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-color);
  background: var(--bg-card-subtle);
}

/* Spinner */
.loading-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border-color);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 1rem;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Media Queries Responsivas */
@media (max-width: 768px) {
  .hero-banner {
    padding: 1.25rem;
  }
  .hero-heading {
    font-size: 1.35rem;
  }
  .search-box-card,
  .detector-card,
  .comparator-card,
  .calculator-card {
    padding: 1rem;
  }
  .filters-grid {
    grid-template-columns: 1fr;
  }
  .titles-cards-grid {
    grid-template-columns: 1fr;
  }
  .modal-dialog {
    max-height: 95vh;
  }
  .modal-footer {
    flex-direction: column-reverse;
  }
  .modal-footer .btn-primary,
  .modal-footer .btn-secondary {
    width: 100%;
  }
}