:root {
  --primary: #0052D9;
  --primary-hover: #0041b8;
  --border: #e0e0e0;
  --bg: #f5f7fa;
  --text: #1a1a1a;
  --text-muted: #666;
  --radius: 8px;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

.app {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

.header {
  text-align: center;
  margin-bottom: 24px;
}

.header h1 {
  font-size: 1.75rem;
  color: var(--primary);
}

.subtitle {
  color: var(--text-muted);
  margin-top: 4px;
  font-size: 0.95rem;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: #fff;
  padding: 16px 20px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}

.toolbar-left {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

.count-selector,
.layout-size-selector {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.layout-size-control {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 280px;
  max-width: 480px;
}

.layout-size-min,
.layout-size-max {
  font-size: 0.82rem;
  color: var(--text-muted);
  flex-shrink: 0;
}

.layout-size-control input[type="range"] {
  flex: 1;
  min-width: 120px;
  accent-color: var(--primary);
}

.layout-size-readout {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
  flex-shrink: 0;
}

.layout-size-value {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  min-width: 2.5em;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.layout-size-mm {
  font-size: 0.78rem;
  color: var(--text-muted);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.layout-size-selector.hidden {
  display: none;
}

.count-selector .label {
  font-weight: 600;
}

.radio-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  padding: 6px 14px;
  border: 2px solid var(--border);
  border-radius: 20px;
  transition: all 0.2s;
  user-select: none;
}

.radio-btn:has(input:checked) {
  border-color: var(--primary);
  background: rgba(0, 82, 217, 0.08);
  color: var(--primary);
  font-weight: 600;
}

.radio-btn input {
  accent-color: var(--primary);
}

.toolbar-actions {
  display: flex;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  font-family: inherit;
}

.btn:active {
  transform: scale(0.98);
}

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

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

.btn-secondary {
  background: #fff;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: #f0f0f0;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.85rem;
}

.btn-block {
  width: 100%;
  margin-top: 4px;
}

.preview-section {
  background: #fff;
  padding: 20px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hint {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.a4-sheet {
  width: 100%;
  max-width: var(--preview-max-width, 595px);
  margin: 0 auto;
  aspect-ratio: var(--sheet-aspect-ratio, 210 / 297);
  background: #fff;
  border: 2px dashed #ccc;
  box-shadow: inset 0 0 0 1px #eee;
  padding: var(--sheet-padding, 3%);
}

.grid-container.layout-1 {
  grid-template-columns: 1fr;
  grid-template-rows: 1fr;
}

.grid-container.layout-2 {
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr;
}

.grid-container {
  display: grid;
  width: 100%;
  height: 100%;
  gap: var(--grid-gap, 2%);
}

.grid-container.layout-4 {
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
}

.grid-container.layout-8 {
  grid-template-columns: 1fr 1fr 1fr 1fr;
  grid-template-rows: 1fr 1fr;
}

.grid-cell {
  position: relative;
  border: 2px dashed #ccc;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: #fafafa;
  transition: border-color 0.2s, box-shadow 0.2s;
  min-height: 0;
}

.grid-cell:hover {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(0, 82, 217, 0.15);
}

.grid-cell.filled {
  border-style: dashed;
  border-color: #bbb;
  background: #fff;
}

.grid-cell.empty .cell-placeholder {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #aaa;
  font-size: 0.75rem;
  text-align: center;
  padding: 8px;
}

.grid-cell.empty .cell-placeholder .plus {
  font-size: 1.5rem;
  line-height: 1;
  margin-bottom: 4px;
}

.cell-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  height: 100%;
}

.cell-photo {
  position: relative;
  flex: 0 0 var(--photo-height-ratio, 78%);
  min-height: 0;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
}

.cell-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.cell-text {
  flex: 0 0 var(--text-height-ratio, 22%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 5px;
  padding: 3px 2px;
  background: #fff;
  min-height: 0;
}

.cell-position {
  font-size: 0.78em;
  color: #555;
  line-height: 1.45;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cell-name {
  font-size: 1.05em;
  font-weight: 700;
  line-height: 1.45;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.layout-1 .cell-position,
.layout-2 .cell-position,
.layout-4 .cell-position,
.layout-8 .cell-position {
  font-size: var(--layout-position-font, 0.88em);
}

.layout-1 .cell-name,
.layout-2 .cell-name,
.layout-4 .cell-name,
.layout-8 .cell-name {
  font-size: var(--layout-name-font, 1.18em);
}

.layout-1 .cell-text,
.layout-2 .cell-text,
.layout-4 .cell-text,
.layout-8 .cell-text {
  gap: var(--layout-text-gap, 6px);
}

.cell-size-badge {
  position: absolute;
  top: 4px;
  right: 4px;
  z-index: 2;
  padding: 2px 6px;
  font-size: 0.62rem;
  line-height: 1.35;
  color: #444;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 3px;
  font-variant-numeric: tabular-nums;
  pointer-events: none;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06);
}

.layout-8 .cell-size-badge {
  font-size: 0.52rem;
  padding: 1px 4px;
  top: 2px;
  right: 2px;
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.modal.hidden {
  display: none;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
}

.modal-dialog {
  position: relative;
  background: #fff;
  border-radius: 12px;
  width: 100%;
  max-width: 1200px;
  max-height: 92vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

.modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  background: #fafbfc;
}

.modal-header-text h2 {
  font-size: 1.15rem;
  margin-bottom: 2px;
}

.modal-subtitle {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.modal-header h2 {
  font-size: 1.15rem;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: #999;
  line-height: 1;
  padding: 4px 8px;
}

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

.modal-body {
  overflow-y: auto;
  padding: 20px;
  flex: 1;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 16px 20px;
  border-top: 1px solid var(--border);
}

.modal-body {
  overflow-y: auto;
  padding: 20px 24px;
  flex: 1;
  background: #f8f9fb;
}

.editor-layout {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.editor-row {
  display: grid;
  gap: 16px;
  align-items: start;
}

.editor-row-top {
  grid-template-columns: minmax(0, 1fr) 260px;
}

.editor-row-bottom {
  grid-template-columns: 1fr 1fr;
}

@media (max-width: 768px) {
  .editor-row-top,
  .editor-row-bottom {
    grid-template-columns: 1fr;
  }
}

.editor-photo {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
}

.editor-preview-panel {
  text-align: center;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.editor-panel {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
}

.panel-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}

.crop-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: var(--photo-aspect-ratio, 0.75);
  max-height: 420px;
  background: #1a1a1a;
  border-radius: var(--radius);
  overflow: hidden;
}

.crop-wrap img {
  display: block;
  max-width: 100%;
}

.crop-wrap img.hidden {
  display: none;
}

.crop-empty {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: #aaa;
  font-size: 0.9rem;
  pointer-events: none;
}

.crop-empty.hidden {
  display: none;
}

.crop-empty-icon {
  width: 48px;
  height: 48px;
  border: 2px dashed #555;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  line-height: 1;
  color: #777;
}

.upload-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.btn-danger-text {
  color: #c62828;
  border-color: #ffcdd2;
}

.btn-danger-text:hover {
  background: #ffebee;
}

.form-group {
  margin-bottom: 12px;
}

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

.form-group label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.slider-val {
  font-weight: 600;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
}

.filter-actions {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}

.filter-actions .btn {
  flex: 1;
}

.form-group input[type="text"] {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
}

.form-group input[type="range"] {
  width: 100%;
  accent-color: var(--primary);
}

.editor-preview-panel .slot-preview-card {
  width: 100%;
  max-width: none;
  aspect-ratio: var(--cell-aspect-ratio, 0.58);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.slot-preview-photo {
  position: relative;
  flex: 0 0 var(--photo-height-ratio, 78%);
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  min-height: 0;
}

#slot-preview-canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.slot-preview-text {
  flex: 0 0 var(--text-height-ratio, 22%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: var(--layout-text-gap, 8px);
  padding: 6px 6px;
  background: #fff;
  min-height: 0;
}

.preview-position {
  font-size: var(--layout-position-font, 1rem);
  color: #555;
  line-height: 1.45;
}

.preview-name {
  font-size: var(--layout-name-font, 1.25rem);
  font-weight: 700;
  line-height: 1.45;
}

.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(255, 255, 255, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
}

.loading-overlay.hidden {
  display: none;
}

.loading-box {
  text-align: center;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid #eee;
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 12px;
}

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

.print-only {
  display: none;
}

@media print {
  .no-print {
    display: none !important;
  }

  .print-only {
    display: block !important;
  }

  @page portrait-page {
    size: A4 portrait;
    margin: 10mm;
  }

  @page landscape-page {
    size: A4 landscape;
    margin: 10mm;
  }

  body {
    background: #fff;
    margin: 0;
  }

  .print-only {
    width: 100%;
  }

  .print-sheet {
    margin: 0 auto;
    padding: var(--sheet-padding, 3%);
    box-sizing: border-box;
    page-break-after: always;
    overflow: visible;
  }

  .print-sheet.a4-portrait {
    page: portrait-page;
    width: var(--print-sheet-width, 190mm);
    height: var(--print-sheet-height, 277mm);
  }

  .print-sheet.a4-landscape {
    page: landscape-page;
    width: var(--print-sheet-width, 277mm);
    height: var(--print-sheet-height, 190mm);
  }

  .print-grid {
    display: grid;
    width: 100%;
    height: 100%;
    gap: var(--grid-gap, 2%);
    box-sizing: border-box;
  }

  .print-grid.layout-1 {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr;
  }

  .print-grid.layout-2 {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr;
  }

  .print-grid.layout-4 {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
  }

  .print-grid.layout-8 {
    grid-template-columns: 1fr 1fr 1fr 1fr;
    grid-template-rows: 1fr 1fr;
  }

  .print-cell {
    border: 0.3mm dashed #bbb;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: #fff;
    min-height: 0;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  .print-cell-photo {
    flex: 0 0 var(--photo-height-ratio, 78%);
    min-height: 0;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fff;
  }

  .print-cell-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
  }

  .print-cell-text {
    flex: 0 0 var(--text-height-ratio, 22%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    gap: 1.2mm;
    padding: 1.2mm 1mm;
    background: #fff;
    min-height: 0;
  }

  .print-cell-position {
    font-size: 11pt;
    line-height: 1.45;
    color: #444;
  }

  .print-cell-name {
    font-size: 15pt;
    line-height: 1.45;
    font-weight: bold;
  }

  .print-grid.layout-1 .print-cell-position,
  .print-grid.layout-2 .print-cell-position,
  .print-grid.layout-4 .print-cell-position,
  .print-grid.layout-8 .print-cell-position {
    font-size: var(--layout-print-position, 12pt);
  }

  .print-grid.layout-1 .print-cell-name,
  .print-grid.layout-2 .print-cell-name,
  .print-grid.layout-4 .print-cell-name,
  .print-grid.layout-8 .print-cell-name {
    font-size: var(--layout-print-name, 17pt);
  }

  .print-grid.layout-1 .print-cell-text,
  .print-grid.layout-2 .print-cell-text,
  .print-grid.layout-4 .print-cell-text,
  .print-grid.layout-8 .print-cell-text {
    gap: var(--layout-print-text-gap, 1.2mm);
  }
}