/* ==========================================================================
   Best Barcodes - High Precision Avery Label & Barcode Print Engine
   Clean, Modern, Accessible CSS with Responsive Layout and Exact Print Engine
   ========================================================================== */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Color Palette */
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-primary-light: #eff6ff;
  --color-success: #10b981;
  --color-success-hover: #059669;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;

  --color-bg-app: #f8fafc;
  --color-bg-sidebar: #ffffff;
  --color-bg-preview: #e2e8f0;
  --color-card-border: #e2e8f0;
  --color-input-border: #cbd5e1;

  --color-text-main: #0f172a;
  --color-text-muted: #64748b;
  --color-text-light: #94a3b8;

  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-sheet: 0 10px 25px -5px rgba(0, 0, 0, 0.15), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

  /* Avery Sheet & Print CSS Variables (Driven dynamically by PrintEngine) */
  --page-width: 8.5in;
  --page-height: 11.0in;
  --page-margin-top: 15.875mm;
  --page-margin-left: 9.525mm;
  --label-width: 57.15mm;
  --label-height: 19.05mm;
  --col-gap: 12.7mm;
  --row-gap: 6.35mm;
  --grid-cols: 3;
  --grid-rows: 10;

  /* Calibration micro-offsets */
  --inner-offset-x: 0mm;
  --inner-offset-y: 0mm;
  --name-font-size: 8pt;
  --barcode-width: 84%;
}

/* Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg-app);
  color: var(--color-text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Site Header */
.site-header {
  background-color: #ffffff;
  border-bottom: 1px solid var(--color-card-border);
  padding: 0.6rem 1.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  z-index: 20;
}

.brand {
  display: flex;
  align-items: center;
}

.brand-h1 {
  display: flex;
  align-items: center;
  margin: 0;
  padding: 0;
  font-size: 1rem;
}

.brand-link {
  text-decoration: none;
  display: flex;
  align-items: center;
}

.brand-logo-img {
  height: 55px;
  width: auto;
  max-width: 280px;
  display: block;
  transition: transform 0.2s ease;
}

.brand-icon.brand-logo-img {
  width: auto;
  height: 55px;
  border-radius: 0;
  box-shadow: none;
}

.brand-link:hover .brand-logo-img {
  transform: scale(1.02);
}

@media (max-width: 640px) {
  .site-header {
    padding: 0.5rem 1rem;
  }
  .brand-logo-img {
    height: 44px;
    max-width: 210px;
  }
  .brand-icon.brand-logo-img {
    height: 44px;
  }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* SEO FAQ & Knowledge Base */
.seo-faq-card {
  margin-top: 1rem;
}

.seo-faq-item {
  border-bottom: 1px solid var(--color-input-border);
  padding: 0.65rem 0;
}

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

.seo-faq-item summary {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

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

.seo-faq-item summary::after {
  content: "+";
  font-size: 0.95rem;
  color: var(--color-primary);
  font-weight: 700;
}

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

.seo-faq-item p {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  line-height: 1.45;
  margin-top: 0.4rem;
}

.header-badges {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.badge-tag {
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.6rem;
  border-radius: 9999px;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

/* App Layout: Split Screen (Controls on Left, Sheet Preview on Right) */
.app-layout {
  display: flex;
  flex: 1;
  overflow: hidden;
  height: calc(100vh - 65px);
}

/* Control Sidebar */
.control-sidebar {
  width: 440px;
  min-width: 400px;
  background-color: var(--color-bg-sidebar);
  border-right: 1px solid var(--color-card-border);
  overflow-y: auto;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  z-index: 10;
}

/* Control Panel Sections */
.panel-card {
  background: #ffffff;
  border: 1px solid var(--color-card-border);
  border-radius: 10px;
  padding: 1rem;
  box-shadow: var(--shadow-sm);
}

.card-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 0.85rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-bg-app);
}

.card-title .step-badge {
  background: var(--color-primary);
  color: white;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  margin-right: 0.5rem;
}

/* Upload Dropzone */
.dropzone {
  border: 2px dashed var(--color-input-border);
  border-radius: 8px;
  padding: 1.25rem 1rem;
  text-align: center;
  background-color: var(--color-bg-app);
  cursor: pointer;
  transition: all 0.2s ease;
  margin-bottom: 0.75rem;
}

.dropzone:hover, .dropzone.drag-over {
  border-color: var(--color-primary);
  background-color: var(--color-primary-light);
}

.dropzone-icon {
  font-size: 1.75rem;
  margin-bottom: 0.35rem;
  color: var(--color-primary);
}

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

.dropzone strong {
  color: var(--color-primary);
}

.file-input-hidden {
  display: none;
}

.data-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Input Mode Tabs (Upload File vs Type Single) */
.tab-toggle-group {
  display: flex;
  background-color: var(--color-bg-app);
  border-radius: 6px;
  padding: 3px;
  border: 1px solid var(--color-input-border);
  margin-bottom: 0.85rem;
}

.tab-toggle-btn {
  flex: 1;
  text-align: center;
  padding: 0.45rem 0.5rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-text-muted);
  border: none;
  background: transparent;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: inherit;
}

.tab-toggle-btn:hover {
  color: var(--color-text-main);
}

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

/* Manual / Single Entry Form */
.manual-quantity-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 0.25rem;
  flex-wrap: wrap;
}

.manual-quantity-row .radio-label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8rem;
  color: var(--color-text-main);
  cursor: pointer;
}

.input-number-sm {
  width: 65px;
  padding: 0.3rem 0.45rem;
  font-size: 0.82rem;
}

.manual-action-buttons {
  display: flex;
  gap: 0.45rem;
  margin-top: 0.85rem;
  align-items: center;
}

/* Form Groups & Controls */
.form-group {
  margin-bottom: 0.85rem;
}

.form-group:last-child {
  margin-bottom: 0;
}

.form-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-main);
  margin-bottom: 0.35rem;
}

.form-select, .form-input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  font-size: 0.85rem;
  border: 1px solid var(--color-input-border);
  border-radius: 6px;
  background-color: #ffffff;
  color: var(--color-text-main);
  font-family: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-select:focus, .form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* Toggle Switches & Radio Groups */
.radio-toggle-group {
  display: flex;
  background-color: var(--color-bg-app);
  border-radius: 6px;
  padding: 3px;
  border: 1px solid var(--color-input-border);
  gap: 2px;
}

.radio-toggle-option {
  flex: 1;
  text-align: center;
  position: relative;
  cursor: pointer;
}

.radio-toggle-option input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  clip: rect(0 0 0 0);
  pointer-events: none;
}

.radio-toggle-option label {
  display: block;
  width: 100%;
  padding: 0.45rem 0.5rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-text-muted);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
}

.radio-toggle-option:hover label {
  color: var(--color-text-main);
}

.radio-toggle-option label.active,
.radio-toggle-option.active label,
.radio-toggle-option input[type="radio"]:checked + label {
  background-color: #ffffff;
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  font-weight: 700;
}

/* Unit Toggle Pills */
.unit-toggle {
  display: inline-flex;
  background: var(--color-bg-app);
  border: 1px solid var(--color-input-border);
  border-radius: 4px;
  padding: 2px;
}

.unit-btn {
  background: transparent;
  border: none;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 3px;
  cursor: pointer;
  color: var(--color-text-muted);
}

.unit-btn.active {
  background: var(--color-primary);
  color: white;
}

/* Micro-Calibration Grid Inputs */
.calibration-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.cal-input-wrap {
  display: flex;
  align-items: center;
}

.cal-input-wrap .form-input {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

.cal-unit-addon {
  background: var(--color-bg-app);
  border: 1px solid var(--color-input-border);
  border-left: none;
  padding: 0.5rem 0.6rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  border-top-right-radius: 6px;
  border-bottom-right-radius: 6px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.5rem 0.85rem;
  border-radius: 6px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: inherit;
}

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

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

.btn-secondary {
  background-color: #ffffff;
  border-color: var(--color-input-border);
  color: var(--color-text-main);
}
.btn-secondary:hover {
  background-color: var(--color-bg-app);
  border-color: var(--color-text-muted);
}

.btn-sm {
  padding: 0.35rem 0.6rem;
  font-size: 0.75rem;
}

.btn-block {
  width: 100%;
}

.btn-huge {
  padding: 0.75rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 700;
}

/* Action Button Deck */
.action-deck {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-top: 0.5rem;
}

/* Community Presets List */
.presets-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: 220px;
  overflow-y: auto;
  margin-top: 0.5rem;
}

.preset-card {
  border: 1px solid var(--color-card-border);
  border-radius: 6px;
  padding: 0.5rem 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: #fafbfc;
}

.preset-info h4 {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-text-main);
}

.preset-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.preset-badge {
  font-size: 0.65rem;
  background: #e0e7ff;
  color: #3730a3;
  padding: 1px 4px;
  border-radius: 3px;
  font-weight: 700;
}

.preset-notes {
  font-size: 0.7rem;
  color: var(--color-text-muted);
}

.preset-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.btn-vote {
  background: #ffffff;
  border: 1px solid var(--color-input-border);
  border-radius: 4px;
  font-size: 0.75rem;
  padding: 0.2rem 0.45rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.btn-vote.voted {
  background: #ecfdf5;
  border-color: var(--color-success);
  color: var(--color-success);
}

/* Preview Viewport (Right Side) */
.preview-viewport {
  flex: 1;
  background-color: var(--color-bg-preview);
  overflow: auto;
  display: flex;
  flex-direction: column;
  position: relative;
}

.preview-toolbar {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-card-border);
  padding: 0.5rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 15;
}

.toolbar-left, .toolbar-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.zoom-controls {
  display: flex;
  align-items: center;
  background: #ffffff;
  border: 1px solid var(--color-input-border);
  border-radius: 6px;
  overflow: hidden;
}

.zoom-btn {
  background: transparent;
  border: none;
  padding: 0.35rem 0.65rem;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  color: var(--color-text-main);
}

.zoom-btn:hover {
  background-color: var(--color-bg-app);
}

.zoom-display {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0 0.4rem;
  min-width: 45px;
  text-align: center;
  color: var(--color-text-muted);
}

/* Print Canvas Container */
.print-area-wrapper {
  padding: 2rem;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100%;
}

.print-area {
  transform-origin: top center;
  transition: transform 0.15s ease-out;
}

/* Individual 8.5" x 11" Avery Sheet Container */
.sheet {
  width: var(--page-width, 8.5in);
  height: var(--page-height, 11in);
  min-width: var(--page-width, 8.5in);
  min-height: var(--page-height, 11in);
  box-sizing: border-box;
  background-color: #ffffff;
  padding-top: var(--page-margin-top);
  padding-left: var(--page-margin-left);
  display: grid;
  grid-template-columns: repeat(var(--grid-cols, 3), var(--label-width));
  grid-template-rows: repeat(var(--grid-rows, 10), var(--label-height));
  column-gap: var(--col-gap);
  row-gap: var(--row-gap);
  box-shadow: var(--shadow-sheet);
  border-radius: 2px;
  position: relative;
  margin-bottom: 2.5rem;
}

.page-badge {
  position: absolute;
  top: -24px;
  left: 0;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Individual Label Container */
.label-container {
  width: var(--label-width);
  height: var(--label-height);
  box-sizing: border-box;
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
}

/* Cut lines overlay (on-screen alignment visual cue) */
.show-cut-lines .label-container {
  border: 1px dashed rgba(37, 99, 235, 0.4);
}

.show-cut-lines .label-container.label-empty {
  border: 1px dashed rgba(203, 213, 225, 0.4);
}

/* Label Internal Content Block */
.label-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  width: 100%;
  height: 100%;
  transform: translate(var(--inner-offset-x), var(--inner-offset-y));
  padding: 0.5mm 1mm;
  box-sizing: border-box;
  position: relative;
  overflow: visible;
}

/* Barcode SVG Container */
.barcode-wrapper {
  width: var(--barcode-width, 88%);
  max-width: 96%;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: visible;
  flex-shrink: 0;
}

.barcode-svg {
  width: 100%;
  height: auto;
  display: block;
  overflow: visible;
}

.barcode-stretch {
  width: 100% !important;
}

.barcode-error {
  color: var(--color-danger);
  font-size: 0.65rem;
  font-weight: 700;
  border: 1px solid var(--color-danger);
  padding: 2px 4px;
  border-radius: 3px;
  background: #fef2f2;
}

.barcode-warning-badge {
  position: absolute;
  top: 1px;
  right: 2px;
  color: var(--color-warning);
  font-size: 0.7rem;
  cursor: help;
}

/* Product Human-Readable Name */
.product-name {
  font-size: var(--name-font-size, 7.5pt);
  line-height: 1.15;
  font-weight: 500;
  color: #111827;
  margin-top: 0.6mm;
  max-width: 96%;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: #1e293b;
  color: #ffffff;
  padding: 0.75rem 1.25rem;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateY(12px);
  transition: all 0.2s ease;
  pointer-events: none;
  z-index: 100;
}

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

/* Modal Window */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 99;
}

.modal.hidden {
  display: none;
}

.modal-dialog {
  background: white;
  border-radius: 12px;
  width: 90%;
  max-width: 440px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: modalIn 0.2s ease;
}

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

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

.modal-header h3 {
  font-size: 1rem;
  font-weight: 700;
}

.modal-body {
  padding: 1.25rem;
}

.modal-footer {
  padding: 0.75rem 1.25rem;
  background: var(--color-bg-app);
  border-top: 1px solid var(--color-card-border);
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
}

/* ==========================================================================
   CSS PRINT ENGINE (@media print)
   Strictly adheres to Avery print requirements with zero margins on sheet body
   ========================================================================== */
@media print {
  @page {
    size: letter portrait;
    margin: 0;
  }

  html, body {
    margin: 0 !important;
    padding: 0 !important;
    background: #ffffff !important;
    width: 8.5in !important;
    height: 11in !important;
    -webkit-print-color-adjust: exact !important;
    print-color-adjust: exact !important;
  }

  /* Completely suppress controls and screen navigation */
  .no-print,
  .site-header,
  .control-sidebar,
  .preview-toolbar,
  .page-badge,
  .modal,
  .toast,
  .site-footer {
    display: none !important;
  }

  .app-layout {
    display: block !important;
    height: auto !important;
    overflow: visible !important;
  }

  .preview-viewport {
    background: transparent !important;
    padding: 0 !important;
    margin: 0 !important;
    overflow: visible !important;
  }

  .print-area-wrapper {
    padding: 0 !important;
    margin: 0 !important;
    display: block !important;
  }

  .print-area {
    transform: none !important;
    margin: 0 !important;
    padding: 0 !important;
  }

  .sheet {
    box-shadow: none !important;
    margin: 0 !important;
    border-radius: 0 !important;
    page-break-inside: avoid !important;
    break-inside: avoid !important;
    page-break-after: always !important;
    break-after: page !important;
  }

  .sheet:last-child {
    page-break-after: auto !important;
    break-after: auto !important;
  }

  /* Hide cut-lines during actual printing */
  .show-cut-lines .label-container {
    border: none !important;
  }
}