/* ==========================================================================
   Fijate Tools - Guía interactiva de nudos marineros y prácticos paso a paso
   Diseño premium naval, cabuyería táctica, modo oscuro/claro y móvil táctil
   ========================================================================== */

:root {
  --knot-navy: #0f172a;
  --knot-blue-primary: #0284c7;
  --knot-blue-light: #38bdf8;
  --knot-blue-dark: #0369a1;
  --knot-orange: #f97316;
  --knot-green: #10b981;
  --knot-amber: #f59e0b;
  --knot-red: #ef4444;

  --knot-bg: #f8fafc;
  --knot-card-bg: #ffffff;
  --knot-border: #e2e8f0;
  --knot-text: #1e293b;
  --knot-text-muted: #475569;
  --knot-accent-bg: #f0f9ff;
  --knot-radius: 14px;
  --knot-shadow: 0 4px 16px rgba(15, 23, 42, 0.06);
  --knot-shadow-lg: 0 10px 30px rgba(15, 23, 42, 0.1);
}

[data-theme="dark"] {
  --knot-bg: #090d16;
  --knot-card-bg: #111827;
  --knot-border: #1f293d;
  --knot-text: #f1f5f9;
  --knot-text-muted: #94a3b8;
  --knot-accent-bg: #0c1c2e;
  --knot-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
  --knot-shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.45);
}

/* Reset y estructura general */
.main-wrapper.tool-layout {
  max-width: 1260px;
  margin: 0 auto;
  padding: 16px;
}

/* Barra de navegación de suite náutica / utilidades */
.suite-nav-strip {
  background: var(--knot-card-bg);
  border-bottom: 1px solid var(--knot-border);
  padding: 10px 16px;
  margin-bottom: 20px;
}

.suite-nav-inner {
  max-width: 1260px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.suite-nav-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--knot-text-muted);
}

.suite-links {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.suite-link-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--knot-text);
  background: var(--knot-bg);
  border: 1px solid var(--knot-border);
  transition: all 0.2s ease;
}

.suite-link-item:hover,
.suite-link-item.active {
  background: var(--knot-blue-primary);
  color: #ffffff;
  border-color: var(--knot-blue-primary);
}

/* Hero Section */
.tool-hero-box {
  background: linear-gradient(135deg, rgba(2, 132, 199, 0.08) 0%, rgba(249, 115, 22, 0.05) 100%);
  border: 1px solid var(--knot-border);
  border-radius: var(--knot-radius);
  padding: 24px;
  margin-bottom: 24px;
}

.hero-pill-category {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 10px;
  border-radius: 20px;
  background: rgba(2, 132, 199, 0.15);
  color: var(--knot-blue-primary);
  margin-bottom: 12px;
}

.tool-page-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--knot-text);
  margin: 0 0 10px 0;
  line-height: 1.25;
}

.tool-page-lead {
  font-size: 1rem;
  line-height: 1.55;
  color: var(--knot-text-muted);
  margin: 0;
}

/* Pestañas de navegación de la herramienta */
.knot-tabs-nav {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--knot-border);
  padding-bottom: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.knot-tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--knot-text-muted);
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  min-height: 40px;
  transition: all 0.2s ease;
}

.knot-tab-btn:hover {
  color: var(--knot-text);
  background: var(--knot-accent-bg);
}

.knot-tab-btn.active {
  color: #ffffff;
  background: var(--knot-blue-primary);
  border-color: var(--knot-blue-primary);
  box-shadow: 0 2px 8px rgba(2, 132, 199, 0.35);
}

.knot-tab-panel {
  display: none;
}

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

/* ==========================================================================
   TALLER INTERACTIVO: VISOR DE PASOS Y SVG
   ========================================================================== */
.knot-interactive-viewer-card {
  background: var(--knot-card-bg);
  border: 1px solid var(--knot-border);
  border-radius: var(--knot-radius);
  box-shadow: var(--knot-shadow);
  padding: 24px;
  margin-bottom: 30px;
}

.viewer-header-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 16px;
  border-bottom: 1px solid var(--knot-border);
  padding-bottom: 16px;
  margin-bottom: 20px;
}

.viewer-header-titles {
  flex: 1 1 300px;
}

.viewer-badge-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.badge-tag.tag-cat { background: rgba(2, 132, 199, 0.12); color: var(--knot-blue-primary); }
.badge-tag.tag-diff { background: rgba(16, 185, 129, 0.12); color: var(--knot-green); }
.badge-tag.tag-abok { background: rgba(99, 102, 241, 0.12); color: #6366f1; font-family: 'JetBrains Mono', monospace; }

.viewer-title-h2 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--knot-text);
  margin: 0;
  display: inline-block;
}

.viewer-title-english {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--knot-text-muted);
  margin-left: 8px;
}

/* Acciones en cabecera del visor (Modo espejo, etc.) */
.viewer-header-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.btn-mode-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  background: var(--knot-bg);
  border: 1px solid var(--knot-border);
  color: var(--knot-text);
  cursor: pointer;
  min-height: 40px;
  transition: all 0.2s ease;
}

.btn-mode-toggle:hover {
  background: var(--knot-accent-bg);
}

.btn-mode-toggle.active {
  background: var(--knot-orange);
  color: #ffffff;
  border-color: var(--knot-orange);
}

/* Layout del Visor: Gráfico + Explicación */
.viewer-body-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: start;
}

@media (max-width: 900px) {
  .viewer-body-grid {
    grid-template-columns: 1fr;
  }
}

/* Viewport SVG */
.step-svg-wrapper {
  background: var(--knot-bg);
  border: 1px solid var(--knot-border);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  position: relative;
  overflow: hidden;
}

.step-svg-viewport {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease;
}

.step-svg-viewport.mirror-mode svg {
  transform: scaleX(-1);
}

.step-svg-viewport svg {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Barra de progreso de pasos */
.step-progress-track {
  width: 100%;
  height: 6px;
  background: var(--knot-border);
  border-radius: 3px;
  margin-top: 14px;
  overflow: hidden;
}

.step-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--knot-blue-primary), var(--knot-blue-light));
  width: 25%;
  transition: width 0.3s ease;
}

/* Controles de reproducción bajo el SVG */
.step-controls-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 14px;
  width: 100%;
}

.step-dots-list {
  display: flex;
  gap: 6px;
  align-items: center;
}

.step-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--knot-border);
  border: none;
  cursor: pointer;
  padding: 0;
  transition: all 0.2s ease;
}

.step-dot.active {
  background: var(--knot-blue-primary);
  transform: scale(1.25);
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.25);
}

.step-dot.completed {
  background: var(--knot-green);
}

.playback-group {
  display: flex;
  gap: 8px;
  align-items: center;
}

.btn-control-step {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  min-height: 40px;
  cursor: pointer;
  border: 1px solid var(--knot-border);
  background: var(--knot-card-bg);
  color: var(--knot-text);
  transition: all 0.2s ease;
}

.btn-control-step:hover:not(:disabled) {
  background: var(--knot-accent-bg);
  border-color: var(--knot-blue-primary);
}

.btn-control-step:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-control-step.primary {
  background: var(--knot-blue-primary);
  color: #ffffff;
  border-color: var(--knot-blue-primary);
}

.btn-control-step.primary:hover:not(:disabled) {
  background: var(--knot-blue-dark);
}

.btn-control-step.playing {
  background: var(--knot-orange);
  color: #ffffff;
  border-color: var(--knot-orange);
}

.select-speed-ctrl {
  min-height: 40px;
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid var(--knot-border);
  background: var(--knot-card-bg);
  color: var(--knot-text);
  font-size: 0.82rem;
  font-weight: 600;
  max-width: 100%;
  min-width: 0;
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
}

/* Columna Explicación Táctica del Paso */
.step-details-column {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.step-header-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--knot-blue-primary);
  background: rgba(2, 132, 199, 0.1);
  padding: 4px 10px;
  border-radius: 6px;
  width: fit-content;
}

.step-current-title-h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--knot-text);
  margin: 0;
  line-height: 1.3;
}

.step-instruction-p {
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--knot-text);
  margin: 0;
}

.step-tip-box {
  background: var(--knot-accent-bg);
  border-left: 4px solid var(--knot-blue-primary);
  border-radius: 0 8px 8px 0;
  padding: 12px 14px;
  font-size: 0.92rem;
  color: var(--knot-text);
  line-height: 1.5;
}

.mnemonic-highlight-box {
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.25);
  border-radius: 10px;
  padding: 14px;
}

.mnemonic-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 0.88rem;
  color: #b45309;
  margin-bottom: 6px;
}

[data-theme="dark"] .mnemonic-header {
  color: #fbbf24;
}

.mnemonic-text {
  font-size: 0.92rem;
  line-height: 1.5;
  color: var(--knot-text);
  margin: 0;
}

.warning-alert-box {
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.25);
  border-radius: 10px;
  padding: 14px;
}

.warning-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 0.88rem;
  color: #b91c1c;
  margin-bottom: 6px;
}

[data-theme="dark"] .warning-header {
  color: #f87171;
}

.warning-text {
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--knot-text);
  margin: 0;
}

.knot-specs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 6px;
}

.spec-cell {
  background: var(--knot-bg);
  border: 1px solid var(--knot-border);
  border-radius: 8px;
  padding: 8px 12px;
}

.spec-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--knot-text-muted);
}

.spec-val {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--knot-text);
}

.uses-list-wrapper {
  margin-top: 6px;
}

.uses-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--knot-text-muted);
  margin-bottom: 6px;
}

.uses-list {
  margin: 0;
  padding-left: 18px;
  font-size: 0.88rem;
  color: var(--knot-text);
  line-height: 1.45;
}

/* ==========================================================================
   BARRA DE FILTROS Y GRID DE CATÁLOGO
   ========================================================================== */
.catalog-section-header {
  margin-top: 30px;
  margin-bottom: 18px;
}

.catalog-section-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--knot-text);
  margin: 0 0 6px 0;
}

.catalog-section-desc {
  font-size: 0.95rem;
  color: var(--knot-text-muted);
  margin: 0;
}

.filters-toolbar-box {
  background: var(--knot-card-bg);
  border: 1px solid var(--knot-border);
  border-radius: var(--knot-radius);
  padding: 16px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 20px;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1 1 200px;
  min-width: 0;
}

.filter-label {
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--knot-text-muted);
}

.filter-select,
.filter-input {
  min-height: 40px;
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid var(--knot-border);
  background: var(--knot-bg);
  color: var(--knot-text);
  font-size: 0.9rem;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
}

.filter-input {
  white-space: normal;
}

.knots-count-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--knot-text-muted);
  margin-bottom: 14px;
}

/* Grid de tarjetas de nudos */
.knots-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-bottom: 30px;
}

.knot-card {
  background: var(--knot-card-bg);
  border: 1px solid var(--knot-border);
  border-radius: var(--knot-radius);
  padding: 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
}

.knot-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--knot-shadow);
  border-color: var(--knot-blue-primary);
}

.knot-card.active {
  border-color: var(--knot-blue-primary);
  box-shadow: 0 0 0 2px var(--knot-blue-primary);
  background: var(--knot-accent-bg);
}

.knot-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.knot-card-cat {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(2, 132, 199, 0.1);
  color: var(--knot-blue-primary);
}

.knot-card-diff {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
}

.diff-fácil { background: rgba(16, 185, 129, 0.1); color: var(--knot-green); }
.diff-medio { background: rgba(245, 158, 11, 0.1); color: var(--knot-amber); }
.diff-avanzado { background: rgba(239, 68, 68, 0.1); color: var(--knot-red); }

.knot-card-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--knot-text);
  margin: 0 0 4px 0;
}

.knot-card-sub {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--knot-text-muted);
  margin-bottom: 8px;
}

.knot-card-desc {
  font-size: 0.88rem;
  line-height: 1.45;
  color: var(--knot-text-muted);
  margin: 0 0 14px 0;
  flex: 1;
}

.knot-card-kpis {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
}

.kpi-pill {
  font-size: 0.75rem;
  background: var(--knot-bg);
  border: 1px solid var(--knot-border);
  padding: 3px 8px;
  border-radius: 6px;
  color: var(--knot-text);
}

.kpi-pill .kpi-k {
  color: var(--knot-text-muted);
  font-weight: 600;
}

.btn-knot-card-action {
  width: 100%;
  min-height: 40px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  background: var(--knot-bg);
  border: 1px solid var(--knot-border);
  color: var(--knot-text);
  cursor: pointer;
  transition: all 0.2s ease;
}

.knot-card:hover .btn-knot-card-action,
.knot-card.active .btn-knot-card-action {
  background: var(--knot-blue-primary);
  color: #ffffff;
  border-color: var(--knot-blue-primary);
}

.empty-results-box {
  grid-column: 1 / -1;
  text-align: center;
  padding: 40px 20px;
  background: var(--knot-card-bg);
  border: 1px dashed var(--knot-border);
  border-radius: var(--knot-radius);
  color: var(--knot-text-muted);
}

.btn-clear-filters {
  margin-top: 12px;
  padding: 8px 16px;
  border-radius: 8px;
  background: var(--knot-blue-primary);
  color: #ffffff;
  border: none;
  font-weight: 600;
  cursor: pointer;
  min-height: 40px;
}

/* ==========================================================================
   PESTAÑA 2: ASISTENTE RECOMENDADOR
   ========================================================================== */
.wizard-panel-card {
  background: var(--knot-card-bg);
  border: 1px solid var(--knot-border);
  border-radius: var(--knot-radius);
  padding: 28px;
  box-shadow: var(--knot-shadow);
  max-width: 800px;
  margin: 0 auto 30px auto;
}

.wizard-question-h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--knot-text);
  margin: 0 0 20px 0;
  text-align: center;
}

.wizard-options-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.wizard-option-btn {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-radius: 10px;
  background: var(--knot-bg);
  border: 1px solid var(--knot-border);
  color: var(--knot-text);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  min-height: 52px;
  transition: all 0.2s ease;
  text-align: left;
}

.wizard-option-btn:hover {
  background: var(--knot-accent-bg);
  border-color: var(--knot-blue-primary);
  transform: translateX(4px);
}

.wizard-result-card {
  text-align: center;
  padding: 10px;
}

.wizard-result-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  background: rgba(16, 185, 129, 0.15);
  color: var(--knot-green);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 12px;
}

.wizard-result-h4 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--knot-text);
  margin: 0 0 12px 0;
}

.wizard-result-desc {
  font-size: 1rem;
  line-height: 1.55;
  color: var(--knot-text-muted);
  max-width: 650px;
  margin: 0 auto 16px auto;
}

.wizard-result-reason-box {
  background: var(--knot-accent-bg);
  border-left: 4px solid var(--knot-blue-primary);
  border-radius: 0 8px 8px 0;
  padding: 14px;
  text-align: left;
  max-width: 650px;
  margin: 0 auto 24px auto;
  font-size: 0.95rem;
  color: var(--knot-text);
  line-height: 1.5;
}

.wizard-result-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ==========================================================================
   PESTAÑA 3: GLOSARIO DE CABUYERÍA
   ========================================================================== */
.glossary-search-bar {
  margin-bottom: 20px;
}

.glossary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-bottom: 30px;
}

.glossary-card {
  background: var(--knot-card-bg);
  border: 1px solid var(--knot-border);
  border-radius: 12px;
  padding: 16px;
}

.glossary-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.glossary-term {
  font-family: 'Outfit', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--knot-text);
  margin: 0;
}

.glossary-category-pill {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  background: var(--knot-bg);
  padding: 2px 8px;
  border-radius: 4px;
  color: var(--knot-text-muted);
}

.glossary-def {
  font-size: 0.92rem;
  line-height: 1.5;
  color: var(--knot-text-muted);
  margin: 0;
}

/* ==========================================================================
   PESTAÑA 4: TEST PRÁCTICO
   ========================================================================== */
.quiz-panel-card {
  background: var(--knot-card-bg);
  border: 1px solid var(--knot-border);
  border-radius: var(--knot-radius);
  padding: 28px;
  box-shadow: var(--knot-shadow);
  max-width: 780px;
  margin: 0 auto 30px auto;
}

.quiz-progress-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--knot-text-muted);
}

.quiz-progress-track {
  width: 100%;
  height: 6px;
  background: var(--knot-border);
  border-radius: 3px;
  margin-bottom: 20px;
  overflow: hidden;
}

.quiz-progress-fill {
  height: 100%;
  background: var(--knot-blue-primary);
  width: 12.5%;
  transition: width 0.3s ease;
}

.quiz-question-h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--knot-text);
  margin: 0 0 20px 0;
}

.quiz-options-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.quiz-option-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border-radius: 10px;
  background: var(--knot-bg);
  border: 1px solid var(--knot-border);
  color: var(--knot-text);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  min-height: 48px;
  text-align: left;
  transition: all 0.2s ease;
}

.quiz-option-btn:hover:not(:disabled) {
  background: var(--knot-accent-bg);
  border-color: var(--knot-blue-primary);
}

.quiz-option-btn .opt-letter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--knot-border);
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.quiz-option-btn.correct {
  background: rgba(16, 185, 129, 0.15);
  border-color: var(--knot-green);
  color: var(--knot-green);
  font-weight: 700;
}

.quiz-option-btn.correct .opt-letter {
  background: var(--knot-green);
  color: #ffffff;
}

.quiz-option-btn.wrong {
  background: rgba(239, 68, 68, 0.15);
  border-color: var(--knot-red);
  color: var(--knot-red);
}

.quiz-option-btn.wrong .opt-letter {
  background: var(--knot-red);
  color: #ffffff;
}

.quiz-feedback-box {
  border-radius: 10px;
  padding: 14px;
  margin-bottom: 20px;
  font-size: 0.95rem;
  line-height: 1.5;
}

.quiz-feedback-box.is-correct {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--knot-text);
}

.quiz-feedback-box.is-wrong {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: var(--knot-text);
}

.btn-quiz-next {
  width: 100%;
  min-height: 44px;
  border-radius: 8px;
  background: var(--knot-blue-primary);
  color: #ffffff;
  border: none;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.quiz-finished-card {
  text-align: center;
  padding: 20px;
}

.quiz-trophy-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px auto;
  color: var(--knot-amber);
}

.quiz-final-score {
  font-family: 'JetBrains Mono', monospace;
  font-size: 2rem;
  font-weight: 800;
  color: var(--knot-blue-primary);
  margin-bottom: 6px;
}

.quiz-final-badge {
  font-family: 'Outfit', sans-serif;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--knot-text);
  margin-bottom: 12px;
}

.quiz-final-msg {
  font-size: 1rem;
  line-height: 1.55;
  color: var(--knot-text-muted);
  max-width: 580px;
  margin: 0 auto 24px auto;
}

/* ==========================================================================
   CONTROLES TÁCTILES MÓVILES (REGLAS DEL USUARIO)
   ========================================================================== */
@media (max-width: 768px) {
  .main-wrapper.tool-layout {
    padding: 10px;
  }
  .tool-page-title {
    font-size: 1.45rem;
  }
  .viewer-title-h2 {
    font-size: 1.35rem;
  }
  .viewer-header-actions {
    width: 100%;
  }
  .btn-mode-toggle {
    width: 100%;
    justify-content: center;
  }
  .step-controls-bar {
    flex-direction: column;
    align-items: stretch;
  }
  .playback-group {
    width: 100%;
    justify-content: space-between;
  }
  .btn-control-step {
    flex: 1;
    justify-content: center;
  }
  .filters-toolbar-box {
    flex-direction: column;
    align-items: stretch;
  }
  .filter-group {
    width: 100%;
  }
  .knots-cards-grid {
    grid-template-columns: 1fr;
  }
  .knot-specs-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   ESTILOS DE IMPRESIÓN (FICHA DE BOLSILLO)
   ========================================================================== */
@media print {
  .app-header,
  .suite-nav-strip,
  .tools-ad-banner-section,
  .knot-tabs-nav,
  .viewer-header-actions,
  .step-controls-bar,
  .filters-toolbar-box,
  .knots-cards-grid,
  .fijate-footer,
  .affiliate-showcase-section,
  .related-tools-section {
    display: none !important;
  }
  body, .main-wrapper.tool-layout {
    background: #ffffff !important;
    color: #000000 !important;
    max-width: 100% !important;
    padding: 0 !important;
  }
  .knot-interactive-viewer-card {
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
  }
  .viewer-body-grid {
    grid-template-columns: 1fr 1fr !important;
  }
}