/* ==============================================================================
   Worksheet Engine & Printable Sheet Styling
   ============================================================================== */

.worksheet-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 32px;
  margin-top: 24px;
  align-items: start;
}

@media (max-width: 1024px) {
  .worksheet-layout {
    grid-template-columns: 1fr;
  }
}

/* ==============================================================================
   Sticky Worksheet Action Toolbar
   ============================================================================== */
.worksheet-toolbar-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

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

.segmented-control {
  display: inline-flex;
  background: var(--bg-muted);
  padding: 4px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.seg-btn {
  border: none;
  background: transparent;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 750;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
}

.seg-btn.active {
  background: var(--bg-card);
  color: var(--text-main);
  box-shadow: var(--shadow-sm);
}

/* ==============================================================================
   The Printable Paper Stage & Realistic Sheet
   ============================================================================== */
.paper-stage {
  background: var(--bg-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
  overflow-x: auto;
}

@media (max-width: 600px) {
  .paper-stage {
    padding: 12px;
  }
}

.worksheet-paper {
  width: 100%;
  max-width: 820px;
  min-height: 1060px;
  background: #ffffff;
  color: #111827;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  box-shadow: 0 12px 36px rgba(15, 23, 42, 0.12);
  padding: 48px 44px;
  position: relative;
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
}

/* Answer key watermark */
.worksheet-paper.is-answer-key::before {
  content: "ANSWER KEY";
  position: absolute;
  top: 40%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(-25deg);
  font-size: 5rem;
  font-weight: 900;
  color: rgba(239, 68, 68, 0.08);
  pointer-events: none;
  letter-spacing: 0.15em;
  z-index: 0;
}

.ws-header {
  border-bottom: 2px solid #1e293b;
  padding-bottom: 16px;
  margin-bottom: 24px;
}

.ws-student-meta {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 20px;
  margin-bottom: 16px;
  font-size: 0.95rem;
  font-weight: 700;
  color: #334155;
}

@media (max-width: 500px) {
  .ws-student-meta { grid-template-columns: 1fr; gap: 8px; }
}

.meta-field {
  border-bottom: 1.5px solid #64748b;
  padding-bottom: 4px;
  display: flex;
  justify-content: space-between;
}

.meta-field span.line {
  flex: 1;
  margin-left: 8px;
}

.ws-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 8px;
}

.ws-title-row h2 {
  font-size: 1.6rem;
  font-weight: 850;
  color: #0f172a;
}

.ws-badge {
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 1.5px solid #0f172a;
}

.ws-instructions-box {
  background: #f8fafc;
  border-left: 4px solid var(--primary);
  padding: 12px 16px;
  border-radius: 4px;
  margin-bottom: 24px;
  font-size: 0.92rem;
  color: #334155;
  line-height: 1.5;
}

.ws-instructions-box strong {
  color: #0f172a;
}

/* Word Bank Box */
.ws-word-bank {
  background: #f1f5f9;
  border: 1.5px dashed #94a3b8;
  border-radius: 8px;
  padding: 12px 16px;
  margin-bottom: 24px;
}

.ws-word-bank-title {
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #475569;
  margin-bottom: 8px;
}

.ws-word-bank-words {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.bank-word {
  background: #ffffff;
  border: 1px solid #cbd5e1;
  padding: 4px 12px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 0.92rem;
  color: #1e293b;
}

/* ==============================================================================
   Questions Grid & Problem Items
   ============================================================================== */
.ws-questions-container {
  display: grid;
  gap: 20px;
  flex: 1;
}

.ws-questions-container.cols-1 { grid-template-columns: 1fr; }
.ws-questions-container.cols-2 { grid-template-columns: 1fr 1fr; }
.ws-questions-container.cols-3 { grid-template-columns: 1fr 1fr 1fr; }

@media (max-width: 600px) {
  .ws-questions-container.cols-2,
  .ws-questions-container.cols-3 {
    grid-template-columns: 1fr;
  }
}

.ws-question-item {
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 14px 16px;
  background: #ffffff;
  display: flex;
  flex-direction: column;
  gap: 10px;
  page-break-inside: avoid;
}

.q-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.q-num {
  font-size: 0.82rem;
  font-weight: 850;
  color: #475569;
  background: #e2e8f0;
  width: 26px;
  height: 26px;
  border-radius: 6px;
  display: grid;
  place-items: center;
}

.q-prompt {
  font-size: 1.02rem;
  font-weight: 500;
  color: #1e293b;
  line-height: 1.6;
  display: block;
}

.q-prompt strong, .q-prompt b {
  font-weight: 700;
  color: #0f172a;
}

.q-work-box {
  min-height: 44px;
  border: 1.5px dashed #cbd5e1;
  border-radius: 6px;
  background: #fafafa;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding: 8px 12px;
  font-size: 1.05rem;
  font-weight: 600;
  color: #0f172a;
}

.is-answer-key .q-work-box {
  background: #f0fdf4;
  border-color: #86efac;
  border-style: solid;
  color: #166534;
}

.answer-text {
  color: #15803d;
  font-weight: 700;
  font-size: 1.02rem;
}

/* Structured Worksheet Fields & Write-in Blanks */
.ws-card-prompt {
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 100%;
}

.ws-field-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.95rem;
  line-height: 1.5;
}

.ws-field-label {
  font-weight: 700;
  color: #334155;
  white-space: nowrap;
}

.ws-line-fill {
  flex: 1;
  min-width: 130px;
  border-bottom: 1.5px solid #64748b;
  min-height: 24px;
  display: inline-flex;
  align-items: flex-end;
  padding-bottom: 2px;
}

.ans-key-tag {
  color: #15803d;
  font-weight: 700;
  font-size: 0.95rem;
  background: #f0fdf4;
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid #86efac;
}

.ws-opt-pill {
  display: inline-block;
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  color: #475569;
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
  margin: 1px 2px;
}

.ws-badge-choice {
  display: inline-block;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  color: #1d4ed8;
  padding: 1px 8px;
  border-radius: 12px;
  font-size: 0.78rem;
  font-weight: 600;
}

/* Vertical column addition & math format */
.vertical-math {
  font-family: 'Courier New', Courier, monospace;
  font-size: 1.4rem;
  font-weight: 800;
  text-align: right;
  width: 90px;
  margin-left: auto;
  line-height: 1.25;
}

.vertical-math .v-op-line {
  border-bottom: 2.5px solid #111827;
  padding-bottom: 2px;
  margin-bottom: 6px;
}

.vertical-math .v-answer-box {
  min-height: 32px;
  color: #2563eb;
}

.answer-text {
  color: #16a34a;
  font-weight: 900;
  background: #dcfce7;
  padding: 2px 8px;
  border-radius: 4px;
}

.ws-footer-stamp {
  margin-top: 32px;
  padding-top: 14px;
  border-top: 1px solid #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: #94a3b8;
  font-weight: 600;
}

/* ==============================================================================
   Educational Article & Teaching Guidelines Sidebar
   ============================================================================== */
.worksheet-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.guide-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.guide-card h3 {
  font-size: 1.15rem;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.guide-content {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.guide-content p, .guide-content ul, .guide-content ol {
  margin-bottom: 12px;
}

.guide-content ul, .guide-content ol {
  padding-left: 20px;
}

.standard-pill {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid rgba(37, 99, 235, 0.2);
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 750;
  margin: 2px 4px 2px 0;
}

/* ==============================================================================
   Print Stylesheet (@media print)
   ============================================================================== */
@media print {
  @page {
    size: letter portrait;
    margin: 12mm 10mm;
  }

  body {
    background: #ffffff !important;
    color: #000000 !important;
  }

  /* Hide website UI chrome */
  .site-header,
  .site-footer,
  .worksheet-toolbar-wrapper,
  .worksheet-sidebar,
  .breadcrumbs,
  .ad-container,
  .mobile-nav-backdrop,
  .mobile-nav-drawer,
  .toast-notice {
    display: none !important;
  }

  .container {
    max-width: 100% !important;
    padding: 0 !important;
    margin: 0 !important;
  }

  .worksheet-layout {
    display: block !important;
    margin: 0 !important;
  }

  .paper-stage {
    background: transparent !important;
    border: none !important;
    padding: 0 !important;
    gap: 0 !important;
  }

  .worksheet-paper {
    box-shadow: none !important;
    border: none !important;
    padding: 0 !important;
    max-width: 100% !important;
    min-height: auto !important;
    page-break-after: always;
    break-after: page;
  }

  .worksheet-paper:last-child {
    page-break-after: auto;
    break-after: auto;
  }

  /* Force color prints to behave on eco printers */
  [data-print-style="bw"] .ws-instructions-box,
  [data-print-style="bw"] .ws-badge,
  [data-print-style="bw"] .ws-question-item {
    border-color: #000000 !important;
    color: #000000 !important;
    background: transparent !important;
  }
}

/* ==========================================================================
   COIN & MONEY BADGES (PRINT & SCREEN)
   ========================================================================== */
.coin-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 6px 0;
}

.coin-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-family: inherit;
  font-weight: 800;
  border: 2px solid;
  box-shadow: 0 1px 2px rgba(0,0,0,0.06);
  user-select: none;
}

.coin-penny {
  width: 32px;
  height: 32px;
  background: #ffedd5;
  border-color: #c2410c;
  color: #9a3412;
  font-size: 0.75rem;
}

.coin-nickel {
  width: 38px;
  height: 38px;
  background: #f1f5f9;
  border-color: #64748b;
  color: #334155;
  font-size: 0.8rem;
}

.coin-dime {
  width: 28px;
  height: 28px;
  background: #e2e8f0;
  border-color: #475569;
  color: #1e293b;
  font-size: 0.72rem;
}

.coin-quarter {
  width: 44px;
  height: 44px;
  background: #f8fafc;
  border-color: #334155;
  color: #0f172a;
  font-size: 0.85rem;
}

@media print {
  .coin-badge {
    box-shadow: none !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
}


/* Keep diagrams and response areas usable on paper. */
.q-prompt svg { max-width: 100%; vertical-align: middle; }
.q-work-box { min-height: 52px; overflow-wrap: anywhere; }
.ws-question-item { break-inside: avoid; page-break-inside: avoid; }
@media print {
  .worksheet-paper { display: block; }
  .ws-questions-container { display: block; columns: 2; column-gap: 24px; }
  .ws-questions-container.cols-1 { columns: 1; }
  .ws-question-item { margin-bottom: 16px; }
  svg { print-color-adjust: exact; -webkit-print-color-adjust: exact; }
}
/* Self-contained curriculum activities: readable tables, models, and writing space. */
.activity-context { margin-bottom: 24px; color: #111827; font-size: .94rem; line-height: 1.65; }
.activity-context p { color: #253047; margin: 8px 0; }
.activity-passage { border: 1px solid #b7c0cb; padding: 14px 18px; margin-bottom: 14px; break-inside: avoid; }
.activity-passage h3 { color: #111827; font-size: 1rem; margin-bottom: 7px; }
.activity-table { width: 100%; border-collapse: collapse; margin: 12px 0; color: #111827; font-size: .85rem; table-layout: fixed; }
.activity-table th, .activity-table td { border: 1px solid #9ca3af; padding: 7px; overflow-wrap: anywhere; vertical-align: top; }
.activity-table th { background: #f1f5f9; font-weight: 700; }
.activity-table tr { break-inside: avoid; }
.activity-context svg, .q-prompt svg { max-width: 100%; height: auto; margin: 8px 4px 8px 0; }
.activity-context svg text, .q-prompt svg text { fill: #111; font-family: Arial, sans-serif; }
.activity-name-control { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; padding: 16px; }
.activity-name-control input { padding: 8px; border: 1px solid var(--border); border-radius: 6px; background: var(--bg-card); }
.trace-name { display: block; font-size: 42px; color: #8a8a8a; letter-spacing: 3px; }
.name-tile { display: inline-block; min-width: 32px; text-align: center; font-size: 24px; border: 1px dashed #333; padding: 6px; margin: 4px; }
.btn:disabled { opacity: .65; cursor: default; transform: none; }
@media print {
 .activity-name-control { display: none !important; }
 .activity-context { break-inside: auto; }
 .activity-table thead { display: table-header-group; }
 .activity-table { page-break-inside: auto; }
 .activity-context p { color: #111; }
}
@media print {
  body { display: block !important; min-height: 0 !important; }
  .paper-stage { display: block !important; overflow: visible !important; }
  .worksheet-view main > :not(.worksheet-layout) { display: none !important; }
  .worksheet-layout > aside { display: none !important; }
  .worksheet-paper { width: 100% !important; border-radius: 0 !important; }
  .worksheet-paper.is-answer-key::before { display: none; }
}
@media screen and (max-width: 500px) {
  .worksheet-paper { padding: 24px 18px; }
  .ws-title-row { flex-wrap: wrap; }
}
@media print {
  /* A one-column multicol container can consume the remaining page and orphan the footer. */
  .ws-questions-container.cols-1 { columns: auto !important; }
  .ws-footer-stamp { margin-top: 16px; font-size: 9px; gap: 12px; }
}
@media print {
  .ws-question-item { padding: 10px 12px; gap: 6px; margin-bottom: 12px; }
  .is-answer-key .q-work-box { min-height: 0 !important; padding-block: 6px; }
  .ws-footer-stamp { display: none !important; }
}