/**
 * Hoja de estilos canónica - Firmar PDF con certificado digital
 * Fijate Tools (C) Todos los derechos reservados.
 */

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

  /* Modo oscuro (predeterminado) */
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-surface: #1a2234;
  --bg-card: #161f30;
  --bg-card-hover: #1e293f;
  --bg-input: #111827;

  --border-color: #243048;
  --border-light: #324160;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #8092ab;

  --accent-blue: #2563eb;
  --accent-blue-hover: #1d4ed8;
  --accent-blue-light: rgba(37, 99, 235, 0.15);
  --accent-blue-glow: rgba(37, 99, 235, 0.35);

  --accent-green: #10b981;
  --accent-green-light: rgba(16, 185, 129, 0.15);

  --accent-amber: #f59e0b;
  --accent-amber-light: rgba(245, 158, 11, 0.15);

  --accent-red: #ef4444;
  --accent-red-light: rgba(239, 68, 68, 0.15);

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

  --select-arrow-svg: 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%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --bg-input: #ffffff;

  --border-color: #e2e8f0;
  --border-light: #cbd5e1;

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

  --accent-blue: #2563eb;
  --accent-blue-hover: #1d4ed8;
  --accent-blue-light: rgba(37, 99, 235, 0.08);
  --accent-blue-glow: rgba(37, 99, 235, 0.2);

  --accent-green: #059669;
  --accent-green-light: rgba(5, 150, 105, 0.1);

  --accent-amber: #d97706;
  --accent-amber-light: rgba(217, 119, 6, 0.1);

  --accent-red: #dc2626;
  --accent-red-light: rgba(220, 38, 38, 0.1);

  --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 -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);

  --select-arrow-svg: 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='%23475569' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: clip;
  width: 100%;
  max-width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-title);
  color: var(--text-primary);
  line-height: 1.3;
}

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

.d-none {
  display: none !important;
}

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

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

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

/* Cabecera temática héroe */
.tool-hero-section {
  text-align: center;
  margin-bottom: 2rem;
}

.badge-pill-privacy {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  border-radius: 9999px;
  background-color: var(--accent-green-light);
  color: var(--accent-green);
  border: 1px solid rgba(16, 185, 129, 0.3);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.85rem;
}

.tool-hero-title {
  font-size: clamp(1.6rem, 3.5vw, 2.3rem);
  font-weight: 800;
  margin-bottom: 0.6rem;
  letter-spacing: -0.02em;
}

.tool-hero-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 760px;
  margin: 0 auto;
}

/* Barra de pestañas */
.nav-tabs-wrapper {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.75rem;
  padding-bottom: 0.25rem;
  -webkit-overflow-scrolling: touch;
}

.nav-tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  border-radius: 0.5rem 0.5rem 0 0;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-title);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s ease;
  position: relative;
  min-height: 44px;
}

.nav-tab-btn:hover {
  color: var(--text-primary);
  background-color: var(--accent-blue-light);
}

.nav-tab-btn.active {
  color: var(--accent-blue);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-bottom: 1px solid var(--bg-surface);
  margin-bottom: -1px;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
  animation: fadeIn 0.25s ease-out;
}

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

/* Cuadrícula de pasos de firma */
.steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 900px) {
  .steps-grid {
    grid-template-columns: 1fr 1fr;
  }
  .step-full-width {
    grid-column: 1 / -1;
  }
}

/* Tarjetas de pasos */
.card-step {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.card-step-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.step-num-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent-blue);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  flex-shrink: 0;
}

.card-step-header h3 {
  font-size: 1.15rem;
  font-weight: 700;
}

/* Zona Drag & Drop */
.dropzone-box {
  border: 2px dashed var(--border-light);
  border-radius: 0.75rem;
  padding: 2.2rem 1.2rem;
  text-align: center;
  cursor: pointer;
  background-color: var(--bg-surface);
  transition: all 0.2s ease;
  min-height: 140px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.dropzone-box:hover, .dropzone-box.dragover {
  border-color: var(--accent-blue);
  background-color: var(--accent-blue-light);
  box-shadow: 0 0 0 4px var(--accent-blue-glow);
}

.dropzone-icon {
  color: var(--accent-blue);
  margin-bottom: 0.75rem;
}

.dropzone-title {
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.dropzone-hint {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Elementos cargados */
.loaded-item-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  margin-bottom: 1rem;
}

.loaded-item-left {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  min-width: 0;
}

.loaded-item-icon {
  color: var(--accent-blue);
  flex-shrink: 0;
}

.loaded-item-title {
  font-weight: 600;
  font-size: 0.95rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.loaded-item-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.btn-icon-danger {
  border: none;
  background: transparent;
  color: var(--accent-red);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 0.375rem;
  transition: background 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-icon-danger:hover {
  background-color: var(--accent-red-light);
}

/* Tarjeta rica del certificado digital */
.cert-details-card {
  background: linear-gradient(145deg, var(--bg-surface), var(--bg-card));
  border: 1px solid var(--border-light);
  border-radius: 0.75rem;
  padding: 1.25rem;
  margin-top: 0.5rem;
}

.cert-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.cert-card-title-group h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.cert-card-nif {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent-blue);
  font-weight: 600;
}

.badge-cert-valid {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.6rem;
  border-radius: 9999px;
  background-color: var(--accent-green-light);
  color: var(--accent-green);
  font-size: 0.75rem;
  font-weight: 700;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-cert-expired {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.6rem;
  border-radius: 9999px;
  background-color: var(--accent-red-light);
  color: var(--accent-red);
  font-size: 0.75rem;
  font-weight: 700;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.cert-info-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.6rem;
  font-size: 0.85rem;
  border-top: 1px solid var(--border-color);
  padding-top: 0.75rem;
}

@media (min-width: 600px) {
  .cert-info-grid {
    grid-template-columns: 1fr 1fr;
  }
}

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

.cert-info-label {
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-bottom: 0.1rem;
}

.cert-info-value {
  color: var(--text-primary);
  font-weight: 500;
}

.cert-info-fingerprint {
  grid-column: 1 / -1;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  word-break: break-all;
}

/* Formularios y controles */
.form-group {
  margin-bottom: 1.15rem;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.45rem;
  color: var(--text-primary);
}

.form-input-wrapper {
  display: flex;
  position: relative;
  width: 100%;
}

.form-input {
  width: 100%;
  min-height: 42px;
  padding: 0.6rem 0.9rem;
  background-color: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px var(--accent-blue-glow);
}

/* Desplegables accesibles según estándar */
.form-select {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
  min-height: 42px;
  padding: 0.6rem 2.5rem 0.6rem 0.9rem;
  background-color: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  appearance: none;
  background-image: var(--select-arrow-svg);
  background-repeat: no-repeat;
  background-position: right 0.9rem center;
  background-size: 16px 16px;
  cursor: pointer;
  outline: none;
  transition: border-color 0.2s;
}

.form-select option, .form-select optgroup {
  background-color: var(--bg-card);
  color: var(--text-primary);
}

.form-select:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px var(--accent-blue-glow);
}

.btn-input-addon {
  border: 1px solid var(--border-color);
  border-left: none;
  background-color: var(--bg-surface);
  color: var(--text-secondary);
  border-radius: 0 0.5rem 0.5rem 0;
  padding: 0 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-input-addon:hover {
  color: var(--text-primary);
}

.form-input-with-addon {
  border-radius: 0.5rem 0 0 0.5rem;
}

/* Botones principales de acción */
.btn-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  min-height: 44px;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-title);
  font-size: 1rem;
  font-weight: 700;
  border-radius: 0.6rem;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-blue-hover));
  color: #ffffff;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover:not(:disabled) {
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.45);
  transform: translateY(-1px);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--bg-card-hover);
  border-color: var(--border-light);
}

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

.btn-cancel {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  min-height: 42px;
  padding: 0.6rem 1.2rem;
  border-radius: 0.5rem;
  cursor: pointer;
}

.btn-cancel:hover {
  background-color: var(--bg-surface);
  color: var(--text-primary);
}

/* Visor interactivo del documento PDF */
.pdf-viewer-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 1.25rem;
  margin-top: 1.5rem;
}

.pdf-viewer-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.toolbar-pagination {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.btn-nav-page {
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  color: var(--text-primary);
  border-radius: 0.375rem;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-nav-page:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--border-light);
}

.toolbar-zoom {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.pdf-canvas-container {
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #2b3547;
  padding: 1rem;
  border-radius: 0.5rem;
  min-height: 420px;
  overflow: auto;
}

.pdf-page-relative-wrapper {
  position: relative;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  display: inline-block;
  background-color: #ffffff;
}

#pdfViewerCanvas {
  display: block;
  max-width: 100%;
}

/* Cajetín arrastrable de firma */
.signature-drag-box {
  position: absolute;
  cursor: move;
  background: rgba(240, 246, 255, 0.95);
  border: 1.5px solid #2563eb;
  border-left: 4px solid #1d4ed8;
  border-radius: 4px;
  padding: 6px 8px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  user-select: none;
  touch-action: none;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  z-index: 10;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.signature-drag-box.is-dragging {
  border-color: #10b981;
  box-shadow: 0 6px 16px rgba(16, 185, 129, 0.4);
}

.sig-box-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 4px;
}

.sig-box-badge {
  font-size: 6.5px;
  font-weight: 700;
  color: #1e3a8a;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.sig-box-name {
  font-size: 8px;
  font-weight: 800;
  color: #0f172a;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sig-box-nif {
  font-size: 7px;
  font-family: var(--font-mono);
  color: #2563eb;
  font-weight: 600;
}

.sig-box-reason {
  font-size: 6.5px;
  color: #475569;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sig-box-rubric-img {
  position: absolute;
  right: 6px;
  top: 6px;
  max-width: 50px;
  max-height: 48px;
  pointer-events: none;
}

/* Lienzo de rúbrica manuscrita */
.canvas-signature-wrapper {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  overflow: hidden;
  margin-bottom: 0.75rem;
}

#handwrittenCanvas {
  display: block;
  width: 100%;
  height: 120px;
  cursor: crosshair;
}

.canvas-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.5rem;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
}

.rubric-preview-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 0.85rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  margin-top: 0.5rem;
}

.rubric-preview-img {
  max-height: 38px;
  max-width: 120px;
}

/* Resumen final y botón de firma */
.signing-summary-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1.25rem;
  margin-top: 1.5rem;
}

.summary-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-bottom: 1.25rem;
}

.summary-item {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
}

.summary-label {
  color: var(--text-muted);
}

.summary-val {
  font-weight: 600;
  text-align: right;
}

/* Secciones de progreso y éxito */
.signing-progress-section {
  text-align: center;
  padding: 2.5rem 1rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  margin-top: 1.5rem;
}

.signing-success-section {
  text-align: center;
  padding: 2rem 1.5rem;
  background-color: var(--bg-card);
  border: 1px solid rgba(16, 185, 129, 0.4);
  border-radius: 1rem;
  margin-top: 1.5rem;
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.15);
}

.success-icon-circle {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background-color: var(--accent-green-light);
  color: var(--accent-green);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
}

.success-meta-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1rem;
  margin: 1.25rem auto;
  max-width: 550px;
  text-align: left;
}

.success-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 450px;
  margin: 1.25rem auto 0;
}

@media (min-width: 600px) {
  .success-actions {
    flex-direction: row;
  }
}

/* Tarjetas de verificación */
.verify-results-section {
  margin-top: 1.5rem;
}

.verify-signature-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1.25rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.verify-signature-card.sig-valid {
  border-left: 4px solid var(--accent-green);
}

.verify-signature-card.sig-invalid {
  border-left: 4px solid var(--accent-red);
}

.verify-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 700;
}

.status-badge-valid {
  background-color: var(--accent-green-light);
  color: var(--accent-green);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.status-badge-invalid {
  background-color: var(--accent-red-light);
  color: var(--accent-red);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.verify-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

@media (min-width: 600px) {
  .verify-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.verify-item {
  display: flex;
  flex-direction: column;
}

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

.verify-val {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

.verify-integrity-note {
  padding: 0.75rem;
  border-radius: 0.5rem;
  font-size: 0.85rem;
}

.note-valid {
  background-color: var(--accent-green-light);
  color: var(--accent-green);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.note-invalid {
  background-color: var(--accent-red-light);
  color: var(--accent-red);
  border: 1px solid rgba(239, 68, 68, 0.25);
}

.no-signatures-box {
  text-align: center;
  padding: 2.5rem 1rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
}

.no-signatures-box h4 {
  margin: 0.75rem 0 0.5rem;
  font-size: 1.2rem;
}

.no-signatures-box p {
  color: var(--text-secondary);
  max-width: 550px;
  margin: 0 auto;
  font-size: 0.95rem;
}

/* Pestaña Sandbox (Certificado de prueba) */
.sandbox-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 1.5rem;
}

.sandbox-result-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: 0.75rem;
  padding: 1.25rem;
  margin-top: 1.5rem;
}

/* Pestaña Historial */
.history-item-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  margin-bottom: 0.75rem;
}

.history-item-title-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
  flex-wrap: wrap;
}

.history-file-name {
  font-size: 0.95rem;
}

.badge-history-page {
  font-size: 0.75rem;
  background-color: var(--accent-blue-light);
  color: var(--accent-blue);
  padding: 0.15rem 0.5rem;
  border-radius: 9999px;
  font-weight: 600;
}

.history-item-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.btn-delete-history {
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.4rem;
  border-radius: 0.375rem;
  transition: all 0.15s;
}

.btn-delete-history:hover {
  color: var(--accent-red);
  background-color: var(--accent-red-light);
}

/* Modales nativos */
.fijate-modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  padding: 1rem;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.fijate-modal-overlay.is-visible {
  opacity: 1;
}

.fijate-modal-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: 1rem;
  max-width: 480px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transform: scale(0.95);
  transition: transform 0.2s ease;
}

.fijate-modal-overlay.is-visible .fijate-modal-card {
  transform: scale(1);
}

.fijate-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 1.4rem;
  border-bottom: 1px solid var(--border-color);
}

.fijate-modal-title {
  font-size: 1.15rem;
  font-weight: 700;
}

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

.fijate-modal-close:hover {
  color: var(--text-primary);
}

.fijate-modal-body {
  padding: 1.4rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.fijate-modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
  padding: 1rem 1.4rem;
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-card);
}

/* Notificaciones Toast flotantes */
.fijate-toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.fijate-toast {
  pointer-events: auto;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: 0.6rem;
  padding: 0.85rem 1.25rem;
  box-shadow: var(--shadow-lg);
  max-width: 380px;
  transform: translateY(15px);
  opacity: 0;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.fijate-toast.is-visible {
  transform: translateY(0);
  opacity: 1;
}

.fijate-toast-content {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.fijate-toast-icon {
  flex-shrink: 0;
}

.fijate-toast-text {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
}

.fijate-toast-success {
  border-left: 4px solid var(--accent-green);
}
.fijate-toast-success .fijate-toast-icon {
  color: var(--accent-green);
}

.fijate-toast-error {
  border-left: 4px solid var(--accent-red);
}
.fijate-toast-error .fijate-toast-icon {
  color: var(--accent-red);
}

.fijate-toast-info {
  border-left: 4px solid var(--accent-blue);
}
.fijate-toast-info .fijate-toast-icon {
  color: var(--accent-blue);
}

/* Spinner */
.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 0.75rem;
}

.spinner-small {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  vertical-align: middle;
}

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

/* Guía didáctica SEO */
.seo-guide-section {
  margin-top: 3rem;
  border-top: 1px solid var(--border-color);
  padding-top: 2.5rem;
}

.seo-guide-title {
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
}

.guide-cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-bottom: 2rem;
}

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

.guide-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1.25rem;
}

.guide-card h4 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.05rem;
  margin-bottom: 0.6rem;
  color: var(--accent-blue);
}

.guide-card p, .guide-card li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.guide-card ul, .guide-card ol {
  padding-left: 1.25rem;
  margin-top: 0.5rem;
}

/* Impresión */
@media print {
  .app-header,
  .tool-ad-sidebar,
  .tools-ad-banner-section,
  .nav-tabs-wrapper,
  .fijate-footer,
  .btn-action,
  .fijate-toast-container {
    display: none !important;
  }

  body, .tool-layout {
    background: #ffffff !important;
    color: #000000 !important;
    padding: 0 !important;
    margin: 0 !important;
  }

  .card-step, .verify-signature-card {
    border: 1px solid #cccccc !important;
    box-shadow: none !important;
  }
}