/**
 * Calculadora de Verifactu y Facturación Electrónica - Hoja de Estilos
 * Cumple con los estándares canónicos de Fijate Tools y reglas de responsividad móvil.
 */

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

  /* Paleta Fintech Oscura / Slate */
  --vf-bg-main: #0b0f17;
  --vf-bg-card: #131a26;
  --vf-bg-card-subtle: #192333;
  --vf-bg-input: #0e1520;
  --vf-border: #233147;
  --vf-border-focus: #3b82f6;

  --vf-text-main: #f1f5f9;
  --vf-text-secondary: #94a3b8;
  --vf-text-muted: #64748b;

  --vf-cyan: #06b6d4;
  --vf-blue: #3b82f6;
  --vf-indigo: #6366f1;
  --vf-emerald: #10b981;
  --vf-amber: #f59e0b;
  --vf-rose: #f43f5e;

  --vf-radius-sm: 6px;
  --vf-radius-md: 10px;
  --vf-radius-lg: 16px;
  --vf-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
}

/* Modo claro sincronizado con data-theme="light" */
[data-theme="light"] {
  --vf-bg-main: #f8fafc;
  --vf-bg-card: #ffffff;
  --vf-bg-card-subtle: #f1f5f9;
  --vf-bg-input: #ffffff;
  --vf-border: #cbd5e1;
  --vf-border-focus: #2563eb;

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

  --vf-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
}

body {
  font-family: var(--font-main);
  background-color: var(--vf-bg-main);
  color: var(--vf-text-main);
  overflow-x: clip;
  width: 100%;
  max-width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  margin: 0;
  padding: 0;
  line-height: 1.5;
}

h1, h2, h3, h4, h5, h6,
.brand-title,
.section-title,
.tab-title {
  font-family: var(--font-heading);
  letter-spacing: -0.02em;
  font-weight: 700;
}

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

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

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

.tool-main-content {
  flex: 1 1 0%;
  min-width: 0;
  width: 100%;
}

.card-main {
  background: var(--vf-bg-card);
  border: 1px solid var(--vf-border);
  border-radius: var(--vf-radius-lg);
  padding: 1.5rem;
  box-shadow: var(--vf-shadow);
  margin-bottom: 2rem;
}

/* Hero y Encabezado */
.tool-hero {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--vf-border);
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(6, 182, 212, 0.12);
  color: var(--vf-cyan);
  border: 1px solid rgba(6, 182, 212, 0.3);
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: none;
  margin-bottom: 0.75rem;
}

.hero-pill-badge .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--vf-cyan);
  box-shadow: 0 0 8px var(--vf-cyan);
}

.hero-title {
  font-size: 1.85rem;
  margin: 0 0 0.5rem;
  color: var(--vf-text-main);
  line-height: 1.25;
}

.hero-desc {
  font-size: 0.95rem;
  color: var(--vf-text-secondary);
  margin: 0;
  max-width: 850px;
}

/* Pestañas de Navegación */
.nav-tabs-wrapper {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.75rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--vf-border);
  -webkit-overflow-scrolling: touch;
}

.nav-tab-btn {
  background: var(--vf-bg-card-subtle);
  border: 1px solid var(--vf-border);
  color: var(--vf-text-secondary);
  padding: 0.65rem 1.15rem;
  border-radius: var(--vf-radius-md);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s ease;
  min-height: 40px;
}

.nav-tab-btn:hover {
  color: var(--vf-text-main);
  border-color: var(--vf-border-focus);
}

.nav-tab-btn.active {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(6, 182, 212, 0.15));
  color: var(--vf-cyan);
  border-color: var(--vf-cyan);
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.2);
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Formularios canónicos y controles responsivos */
.form-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.form-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.form-group {
  margin-bottom: 1.1rem;
  display: flex;
  flex-direction: column;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--vf-text-secondary);
  margin-bottom: 0.4rem;
}

.form-control {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  height: 42px;
  background-color: var(--vf-bg-input);
  border: 1px solid var(--vf-border);
  border-radius: var(--vf-radius-sm);
  padding: 0.5rem 0.75rem;
  color: var(--vf-text-main);
  font-size: 0.9rem;
  font-family: var(--font-main);
  box-sizing: border-box;
  transition: border-color 0.2s;
}

.form-control:focus {
  outline: none;
  border-color: var(--vf-border-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

select.form-control {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
  padding-right: 40px;
  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='%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 12px center;
}

select.form-control option {
  background-color: var(--vf-bg-card);
  color: var(--vf-text-main);
}

.field-feedback {
  font-size: 0.78rem;
  margin-top: 0.35rem;
}

.text-success { color: var(--vf-emerald); }
.text-danger { color: var(--vf-rose); }
.text-warning { color: var(--vf-amber); }
.text-primary { color: var(--vf-cyan); }
.text-muted { color: var(--vf-text-muted); }

/* Módulo 1: Layout del generador de QR */
.qr-builder-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.75rem;
  align-items: start;
}

.ticket-preview-card {
  background: #ffffff;
  color: #1e293b;
  border-radius: var(--vf-radius-md);
  padding: 1.5rem;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  border: 1px dashed #cbd5e1;
  position: relative;
  font-family: var(--font-mono);
}

.ticket-preview-card::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  right: 0;
  height: 6px;
  background: radial-gradient(circle, transparent, transparent 50%, #ffffff 50%, #ffffff 100%);
  background-size: 12px 12px;
}

.ticket-header {
  text-align: center;
  border-bottom: 1px dashed #cbd5e1;
  padding-bottom: 0.75rem;
  margin-bottom: 1rem;
}

.ticket-brand {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 800;
  color: #0f172a;
}

.ticket-meta-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  margin-bottom: 0.25rem;
}

.ticket-qr-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1rem 0;
  border-top: 1px dashed #cbd5e1;
  border-bottom: 1px dashed #cbd5e1;
  margin: 1rem 0;
}

#qrcode-box {
  background: #ffffff;
  padding: 8px;
  border-radius: 8px;
  display: inline-block;
}

#qrcode-box img, #qrcode-box canvas {
  display: block;
  margin: 0 auto;
}

.badge-verifactu-official {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: #e0f2fe;
  color: #0369a1;
  font-weight: 700;
  font-size: 0.8rem;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  margin-top: 0.6rem;
  letter-spacing: 0.05em;
}

.badge-verifactu-official .vf-logo-dot {
  width: 6px;
  height: 6px;
  background: #0284c7;
  border-radius: 50%;
}

.badge-no-verifactu {
  font-size: 0.75rem;
  color: #64748b;
  margin-top: 0.5rem;
}

.ticket-leyenda-aeat {
  font-size: 0.7rem;
  text-align: center;
  color: #475569;
  margin-top: 0.5rem;
  line-height: 1.3;
}

.qr-actions-box {
  margin-top: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.btn-primary {
  background: linear-gradient(135deg, #2563eb, #06b6d4);
  color: #ffffff;
  border: none;
  border-radius: var(--vf-radius-sm);
  padding: 0.65rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font-heading);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 40px;
  transition: opacity 0.2s, transform 0.1s;
}

.btn-primary:hover {
  opacity: 0.95;
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--vf-bg-card-subtle);
  color: var(--vf-text-main);
  border: 1px solid var(--vf-border);
  border-radius: var(--vf-radius-sm);
  padding: 0.65rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font-heading);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 40px;
  transition: all 0.2s;
}

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

.btn-warning-outline {
  background: rgba(245, 158, 11, 0.1);
  color: var(--vf-amber);
  border: 1px solid var(--vf-amber);
  border-radius: var(--vf-radius-sm);
  padding: 0.65rem 1.25rem;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 40px;
  transition: background 0.2s;
}

.btn-warning-outline:hover {
  background: rgba(245, 158, 11, 0.2);
}

.qr-raw-url-box {
  background: var(--vf-bg-input);
  border: 1px solid var(--vf-border);
  border-radius: var(--vf-radius-sm);
  padding: 0.75rem;
  margin-top: 1.25rem;
}

.qr-raw-url-box .url-label {
  font-size: 0.75rem;
  color: var(--vf-text-muted);
  display: block;
  margin-bottom: 0.25rem;
}

.qr-raw-url-box code {
  font-size: 0.78rem;
  word-break: break-all;
  color: var(--vf-cyan);
}

/* Módulo 2: Simulador de Encadenamiento SHA-256 */
.chain-controls-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  background: var(--vf-bg-card-subtle);
  border: 1px solid var(--vf-border);
  border-radius: var(--vf-radius-md);
  padding: 1rem;
  margin-bottom: 1.5rem;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.85rem;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 600;
}

.status-intact {
  background: rgba(16, 185, 129, 0.15);
  color: var(--vf-emerald);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.status-broken {
  background: rgba(244, 63, 94, 0.15);
  color: var(--vf-rose);
  border: 1px solid rgba(244, 63, 94, 0.3);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
}

.status-dot.blink {
  animation: pulse 1s infinite alternate;
}

@keyframes pulse {
  from { opacity: 0.3; }
  to { opacity: 1; }
}

.chain-cards-container {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.chain-block-card {
  background: var(--vf-bg-card);
  border: 1px solid var(--vf-border);
  border-radius: var(--vf-radius-md);
  padding: 1.25rem;
  position: relative;
  transition: all 0.25s ease;
}

.chain-block-card.block-valid {
  border-left: 4px solid var(--vf-emerald);
}

.chain-block-card.block-corrupted {
  border-left: 4px solid var(--vf-rose);
  background: rgba(244, 63, 94, 0.04);
}

.block-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.85rem;
}

.block-title-box {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.block-index-badge {
  background: var(--vf-bg-input);
  border: 1px solid var(--vf-border);
  color: var(--vf-text-secondary);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
}

.block-invoice-num {
  margin: 0;
  font-size: 1.1rem;
  color: var(--vf-text-main);
}

.block-status-pill {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 9999px;
}

.pill-valid {
  background: rgba(16, 185, 129, 0.15);
  color: var(--vf-emerald);
}

.pill-invalid {
  background: rgba(244, 63, 94, 0.2);
  color: var(--vf-rose);
}

.block-meta-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

.meta-label {
  color: var(--vf-text-muted);
  display: block;
  font-size: 0.75rem;
}

.meta-val {
  color: var(--vf-text-secondary);
}

.meta-val-highlight {
  color: var(--vf-text-main);
  font-size: 0.95rem;
}

.block-hashes-box {
  background: var(--vf-bg-input);
  border: 1px solid var(--vf-border);
  border-radius: var(--vf-radius-sm);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.8rem;
}

.hash-preview {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.hash-tag {
  color: var(--vf-text-muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  font-weight: 600;
}

.hash-link-arrow {
  color: var(--vf-cyan);
  display: flex;
  align-items: center;
}

.corruption-alert {
  margin-top: 1rem;
  background: rgba(244, 63, 94, 0.1);
  border: 1px solid var(--vf-rose);
  border-radius: var(--vf-radius-sm);
  padding: 0.85rem;
  font-size: 0.83rem;
  color: var(--vf-rose);
}

.corruption-alert p {
  margin: 0.25rem 0 0;
  line-height: 1.4;
}

.block-footer {
  margin-top: 0.85rem;
  display: flex;
  justify-content: flex-end;
}

.btn-block-action {
  background: none;
  border: 1px solid var(--vf-border);
  color: var(--vf-text-secondary);
  font-size: 0.78rem;
  padding: 0.3rem 0.65rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-block-action:hover {
  background: var(--vf-border);
  color: var(--vf-text-main);
}

/* Módulo 3: Diagnóstico y Autoevaluación */
.diag-card-wrapper {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.diag-question-group {
  background: var(--vf-bg-card-subtle);
  border: 1px solid var(--vf-border);
  border-radius: var(--vf-radius-md);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.diag-q-title {
  font-size: 1rem;
  margin: 0 0 0.85rem;
  color: var(--vf-text-main);
}

.diag-options-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.diag-radio-label {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  background: var(--vf-bg-card);
  border: 1px solid var(--vf-border);
  border-radius: var(--vf-radius-sm);
  padding: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
}

.diag-radio-label:hover {
  border-color: var(--vf-cyan);
}

.diag-radio-label input[type="radio"] {
  margin-top: 0.2rem;
}

.diag-option-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--vf-text-main);
  display: block;
}

.diag-option-desc {
  font-size: 0.76rem;
  color: var(--vf-text-secondary);
  display: block;
  margin-top: 0.2rem;
}

.diagnostic-summary-box {
  border-radius: var(--vf-radius-md);
  padding: 1.5rem;
  margin-top: 1.5rem;
  border: 1px solid var(--vf-border);
}

.risk-critico {
  background: rgba(244, 63, 94, 0.08);
  border-color: var(--vf-rose);
}

.risk-alto {
  background: rgba(245, 158, 11, 0.08);
  border-color: var(--vf-amber);
}

.risk-bajo {
  background: rgba(16, 185, 129, 0.08);
  border-color: var(--vf-emerald);
}

.diag-timeline-highlights {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 1.25rem 0;
}

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

.kpi-label {
  font-size: 0.78rem;
  color: var(--vf-text-muted);
  display: block;
}

.kpi-val {
  font-size: 1.2rem;
  font-family: var(--font-heading);
  display: block;
  margin: 0.2rem 0;
}

.kpi-sub {
  font-size: 0.75rem;
  color: var(--vf-text-secondary);
}

.diag-recommendation-box {
  background: var(--vf-bg-card);
  border: 1px solid var(--vf-border);
  border-radius: var(--vf-radius-sm);
  padding: 1rem;
  margin-top: 1rem;
}

.diag-recommendation-box ul {
  padding-left: 1.2rem;
  margin: 0.5rem 0 0;
  font-size: 0.85rem;
  color: var(--vf-text-secondary);
}

.steps-ordered-list {
  padding-left: 1.25rem;
  font-size: 0.85rem;
  color: var(--vf-text-secondary);
  line-height: 1.6;
}

/* Módulo 4: Calendario y Línea de Tiempo */
.timeline-track {
  position: relative;
  padding-left: 2rem;
  margin: 1.5rem 0;
}

.timeline-track::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--vf-border);
}

.timeline-milestone {
  position: relative;
  margin-bottom: 2rem;
}

.milestone-dot {
  position: absolute;
  left: -2rem;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--vf-bg-card);
  border: 3px solid var(--vf-cyan);
}

.milestone-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.4rem;
}

.milestone-date {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--vf-cyan);
}

.milestone-target {
  font-size: 0.75rem;
  background: var(--vf-bg-card-subtle);
  border: 1px solid var(--vf-border);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  color: var(--vf-text-secondary);
}

.milestone-title {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
  color: var(--vf-text-main);
}

.milestone-desc {
  margin: 0;
  font-size: 0.85rem;
  color: var(--vf-text-secondary);
}

/* Acordeón FAQ y Guía SEO */
.faq-section {
  margin-top: 3rem;
  border-top: 1px solid var(--vf-border);
  padding-top: 2rem;
}

.faq-title {
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
  color: var(--vf-text-main);
}

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

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

.faq-item summary {
  padding: 1rem 1.25rem;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  color: var(--vf-text-main);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.faq-item summary::after {
  content: '+';
  font-size: 1.2rem;
  color: var(--vf-cyan);
}

.faq-item[open] summary::after {
  content: '−';
}

.faq-content {
  padding: 0 1.25rem 1.25rem;
  font-size: 0.88rem;
  color: var(--vf-text-secondary);
  line-height: 1.6;
}

/* Modal Universal (Regla de confirmaciones sin alert) */
.vf-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 99999;
  padding: 1rem;
}

.vf-modal-overlay.active {
  display: flex;
}

.vf-modal-dialog {
  background: var(--vf-bg-card);
  border: 1px solid var(--vf-border);
  border-radius: var(--vf-radius-lg);
  max-width: 580px;
  width: 100%;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
  display: flex;
  flex-direction: column;
  max-height: 90vh;
  overflow: hidden;
  animation: modalScale 0.2s ease-out;
}

@keyframes modalScale {
  from { transform: scale(0.95); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

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

.vf-modal-title {
  margin: 0;
  font-size: 1.15rem;
  color: var(--vf-text-main);
}

.vf-modal-close-icon {
  background: none;
  border: none;
  color: var(--vf-text-secondary);
  font-size: 1.3rem;
  cursor: pointer;
  padding: 0;
  line-height: 1;
}

.vf-modal-body {
  padding: 1.5rem;
  overflow-y: auto;
  font-size: 0.9rem;
  color: var(--vf-text-secondary);
  line-height: 1.6;
}

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

.code-box-inline {
  background: var(--vf-bg-input);
  border: 1px solid var(--vf-border);
  border-radius: var(--vf-radius-sm);
  padding: 0.65rem 0.85rem;
  margin: 0.5rem 0;
  overflow-x: auto;
}

.code-box-inline code, .code-box-inline pre {
  font-size: 0.78rem;
  color: var(--vf-cyan);
  word-break: break-all;
  white-space: pre-wrap;
}

/* Responsividad móvil */
@media (max-width: 900px) {
  .qr-builder-layout {
    grid-template-columns: 1fr;
  }

  .form-grid-2,
  .form-grid-3,
  .diag-options-grid,
  .diag-timeline-highlights {
    grid-template-columns: 1fr;
  }

  .block-meta-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 600px) {
  .tool-layout {
    padding: 0 0.75rem;
    margin: 1rem auto 2rem;
  }

  .card-main {
    padding: 1rem;
  }

  .hero-title {
    font-size: 1.4rem;
  }

  .chain-controls-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .chain-controls-bar .status-badge {
    text-align: center;
    justify-content: center;
  }

  .block-meta-grid {
    grid-template-columns: 1fr;
  }

  .btn-primary,
  .btn-secondary,
  .btn-warning-outline {
    width: 100%;
  }
}