/* ==========================================================================
   CardSheet & Flashcard Print Layout Studio — Screen UI & Exact Physical Print CSS
   ========================================================================== */
:root {
  --bg-app: #f1f5f9;
  --bg-panel: #ffffff;
  --bg-subtle: #f8fafc;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-light: #64748b;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-soft: #eff6ff;
  --pro-accent: #7c3aed;
  --pro-soft: #f5f3ff;
  --emerald: #059669;
  --emerald-soft: #ecfdf5;
  --amber: #d97706;
  --radius-lg: 14px;
  --radius-md: 10px;
  --radius-sm: 7px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-sheet: 0 14px 36px rgba(15, 23, 42, 0.14), 0 2px 8px rgba(15, 23, 42, 0.08);
}

*, *::before, *::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg-app);
  color: var(--text-main);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Top Navigation Header */
.studio-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 20px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.brand-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
  font-weight: 800;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.brand-title {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
  margin: 0;
}

.brand-sub {
  font-size: 11.5px;
  color: var(--text-light);
  margin: 0;
}

.mode-tabs {
  display: inline-flex;
  background: var(--bg-app);
  padding: 3px;
  border-radius: 10px;
  border: 1px solid var(--border);
}

.mode-tab {
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 13px;
  border-radius: 7px;
  cursor: pointer;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

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

.pro-pill-mini {
  font-size: 10px;
  font-weight: 800;
  padding: 1px 5px;
  border-radius: 4px;
  background: var(--pro-soft);
  color: var(--pro-accent);
  border: 1px solid #ddd6fe;
  text-transform: uppercase;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border-radius: var(--radius-sm);
  padding: 7px 13px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--border-strong);
  background: #ffffff;
  color: var(--text-main);
  transition: all 0.15s ease;
  text-decoration: none;
}

.btn:hover {
  background: var(--bg-subtle);
  border-color: #94a3b8;
}

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

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

.btn-pro {
  background: linear-gradient(135deg, #7c3aed, #2563eb);
  border-color: transparent;
  color: #ffffff;
  box-shadow: 0 3px 10px rgba(124, 58, 237, 0.25);
}

.btn-pro:hover {
  opacity: 0.94;
  background: linear-gradient(135deg, #6d28d9, #1d4ed8);
  color: #ffffff;
}

.btn-pro.unlocked {
  background: var(--emerald-soft);
  color: var(--emerald);
  border: 1px solid #a7f3d0;
  box-shadow: none;
}

/* Main Studio Split Layout */
.studio-workspace {
  display: grid;
  grid-template-columns: 410px minmax(0, 1fr);
  gap: 0;
  min-height: calc(100vh - 58px);
}

@media (max-width: 1040px) {
  .studio-workspace {
    grid-template-columns: 1fr;
  }
}

/* Sidebar Controls */
.control-sidebar {
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-height: calc(100vh - 58px);
  overflow-y: auto;
}

@media (max-width: 1040px) {
  .control-sidebar {
    max-height: none;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
}

.panel-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 13px 14px;
  background: #ffffff;
}

.panel-card.pro-highlight {
  border-color: #ddd6fe;
  background: linear-gradient(180deg, #faf5ff 0%, #ffffff 48%);
}

.panel-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-main);
  margin: 0 0 10px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 9px;
}

.field-group {
  margin-bottom: 9px;
}

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

.field-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.input-control, select.input-control, textarea.input-control {
  width: 100%;
  padding: 7px 9px;
  font-size: 13px;
  border: 1px solid var(--border-strong);
  border-radius: 7px;
  background: #ffffff;
  color: var(--text-main);
  font-family: inherit;
}

textarea.input-control {
  min-height: 132px;
  resize: vertical;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 12px;
  line-height: 1.45;
}

.input-control:focus {
  outline: 2px solid rgba(37, 99, 235, 0.25);
  border-color: var(--primary);
}

.seg-pills {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  background: var(--bg-app);
  padding: 3px;
  border-radius: 8px;
}

.seg-btn {
  border: none;
  background: transparent;
  padding: 6px 8px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
}

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

.metric-banner {
  background: var(--primary-soft);
  border: 1px solid #bfdbfe;
  color: #1e40af;
  border-radius: 8px;
  padding: 7px 10px;
  font-size: 12px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
}

.sample-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-bottom: 8px;
}

.chip-btn {
  border: 1px solid var(--border-strong);
  background: var(--bg-subtle);
  color: var(--text-muted);
  border-radius: 999px;
  padding: 3px 9px;
  font-size: 11.5px;
  font-weight: 600;
  cursor: pointer;
}

.chip-btn:hover, .chip-btn.active {
  background: var(--primary-soft);
  border-color: #93c5fd;
  color: var(--primary);
}

.dropzone {
  border: 1.5px dashed #94a3b8;
  border-radius: 9px;
  padding: 14px 12px;
  text-align: center;
  background: var(--bg-subtle);
  cursor: pointer;
  transition: all 0.15s ease;
  margin-bottom: 8px;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.range-row {
  display: grid;
  grid-template-columns: 1fr 68px;
  gap: 8px;
  align-items: center;
}

/* Preview Canvas Stage */
.preview-column {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 16px 22px 36px;
}

.stage-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}

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

.sheet-stage-scroll {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  overflow-x: auto;
  padding: 8px 4px 20px;
}

.sheet-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.sheet-caption {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.side-badge {
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
}

.side-badge.front {
  background: #dbeafe;
  color: #1d4ed8;
}

.side-badge.back {
  background: #ede9fe;
  color: #6d28d9;
}

/* Physical Print Sheet (Exact 1:1 mm Geometry) */
.print-sheet {
  position: relative;
  background: #ffffff;
  box-shadow: var(--shadow-sheet);
  overflow: hidden;
  transform-origin: top center;
  flex-shrink: 0;
  -webkit-print-color-adjust: exact;
  print-color-adjust: exact;
}

.sheet-guides-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 20;
}

/* Individual Card Slot */
.card-cell {
  position: absolute;
  overflow: hidden;
  display: flex;
  align-items: stretch;
  justify-content: stretch;
  z-index: 10;
}

.card-trim-box {
  position: absolute;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: #ffffff;
}

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

/* Built-in Text / Vocabulary Flashcard Themes */
.card-designed {
  width: 100%;
  height: 100%;
  padding: 7% 8%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.card-designed.theme-study {
  background: #ffffff;
  color: #0f172a;
}

.card-designed.theme-study.with-frame {
  border: 0.35mm solid #cbd5e1;
}

.card-designed.theme-tabletop {
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  color: #0f172a;
}

.card-designed.theme-tabletop.with-frame {
  border: 0.55mm solid #1e293b;
  box-shadow: inset 0 0 0 0.8mm #ffffff, inset 0 0 0 1.05mm #94a3b8;
}

.card-designed.theme-parchment {
  background: #fffbeb;
  color: #292524;
}

.card-designed.theme-parchment.with-frame {
  border: 0.5mm solid #78350f;
  box-shadow: inset 0 0 0 0.8mm #fffbeb, inset 0 0 0 1.05mm #d97706;
}

.card-designed.theme-minimal {
  background: #ffffff;
  color: #0f172a;
}

.card-designed.theme-minimal.with-frame {
  border: 0.25mm solid #e2e8f0;
}

.card-designed.theme-badge {
  background: #f8fafc;
  color: #0f172a;
}

.card-designed.theme-badge.with-frame {
  border: 0.45mm solid #334155;
}

.card-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 4px;
  font-size: 0.68em;
  font-weight: 700;
  color: #475569;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.card-tag-pill {
  background: rgba(15, 23, 42, 0.07);
  padding: 1px 5px;
  border-radius: 3px;
  max-width: 78%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.card-icon-glyph {
  font-size: 1.35em;
  line-height: 1;
}

.card-center-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4% 2%;
  overflow: hidden;
}

.card-front-heading {
  font-size: 1.08em;
  font-weight: 800;
  line-height: 1.25;
  word-break: break-word;
}

.card-front-subhint {
  margin-top: 5px;
  font-size: 0.72em;
  color: #475569;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-back-definition {
  font-size: 0.84em;
  font-weight: 500;
  line-height: 1.38;
  color: #1e293b;
  word-break: break-word;
}

.card-crest-back {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at center, #1e293b 0%, #0f172a 100%);
  color: #f8fafc;
  border: 1.6mm solid #ffffff;
  box-shadow: inset 0 0 0 0.5mm #cbd5e1;
  text-align: center;
  padding: 10%;
}

.card-crest-back.low-ink {
  background: #ffffff;
  color: #0f172a;
  border: 0.6mm double #334155;
}

.card-foot-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.58em;
  color: #94a3b8;
  border-top: 0.2mm solid rgba(148, 163, 184, 0.3);
  padding-top: 2px;
}

/* Cross-Sell & SEO Ecosystem Footer */
.ecosystem-section {
  max-width: 920px;
  width: 100%;
  margin: 18px auto 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.pnp-cross-sell {
  border: 1px solid #c7d2fe;
  border-radius: 14px;
  padding: 16px 18px;
  background: linear-gradient(135deg, #eef2ff 0%, #f8fafc 60%, #ecfdf5 100%);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.pnp-cross-info {
  flex: 1;
  min-width: 250px;
}

.pnp-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 800;
  color: #4338ca;
  background: #e0e7ff;
  padding: 2px 8px;
  border-radius: 999px;
  margin-bottom: 5px;
}

.pnp-cross-title {
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 800;
  color: #0f172a;
}

.pnp-cross-desc {
  margin: 0;
  font-size: 12.5px;
  color: #334155;
}

.seo-guides-strip {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  background: #ffffff;
}

.seo-guides-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 8px;
  margin-top: 8px;
}

.seo-guide-link {
  display: block;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: none;
  background: var(--bg-subtle);
}

.seo-guide-link:hover {
  border-color: #93c5fd;
  color: var(--primary);
  background: var(--primary-soft);
}

/* Pro License Unlock Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.58);
  backdrop-filter: blur(4px);
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.modal-backdrop.open {
  display: flex;
}

.modal-card {
  background: #ffffff;
  border-radius: 16px;
  max-width: 500px;
  width: 100%;
  padding: 24px;
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.28);
  border: 1px solid var(--border);
  position: relative;
}

.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  border: none;
  background: var(--bg-app);
  width: 30px;
  height: 30px;
  border-radius: 999px;
  font-size: 16px;
  cursor: pointer;
  color: var(--text-muted);
}

.pro-feature-list {
  margin: 12px 0 16px;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 13px;
}

.pro-feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  background: var(--bg-subtle);
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.key-input-row {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

.status-msg {
  font-size: 12.5px;
  font-weight: 600;
  margin-top: 8px;
  min-height: 18px;
}

/* ==========================================================================
   EXACT VECTOR 1:1 MILLIMETER PRINT ENGINE (@media print)
   ========================================================================== */
@media print {
  html, body {
    background: #ffffff !important;
    margin: 0 !important;
    padding: 0 !important;
    width: auto !important;
    height: auto !important;
  }

  .no-print,
  .studio-header,
  .control-sidebar,
  .stage-toolbar,
  .sheet-caption,
  .ecosystem-section,
  .modal-backdrop {
    display: none !important;
  }

  .studio-workspace,
  .preview-column,
  .sheet-stage-scroll,
  .sheet-wrapper {
    display: block !important;
    margin: 0 !important;
    padding: 0 !important;
    gap: 0 !important;
    overflow: visible !important;
  }

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

  .sheet-wrapper:last-of-type .print-sheet {
    page-break-after: auto;
    break-after: auto;
  }

  .sheet-wrapper.print-excluded {
    display: none !important;
  }
}