/**
 * L13 巩固练习 · 打印 PDF 工具栏与排版（每 Part 一页）
 */

/* —— 屏幕：PDF 工具栏 —— */
.practice-pdf-bar {
  position: fixed;
  top: max(12px, env(safe-area-inset-top, 0px));
  right: max(12px, env(safe-area-inset-right, 0px));
  z-index: 250;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.45rem;
  max-width: min(320px, calc(100vw - 24px));
  pointer-events: none;
}

.practice-pdf-bar > * {
  pointer-events: auto;
}

.btn-practice-pdf {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.55rem 1.1rem;
  border: 2px solid #0284c7;
  border-radius: 999px;
  background: linear-gradient(180deg, #ffffff 0%, #e0f2fe 100%);
  color: #0369a1;
  font-family: var(--font-family, 'Nunito', system-ui, sans-serif);
  font-size: 0.92rem;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(14, 165, 233, 0.28);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  touch-action: manipulation;
}

.btn-practice-pdf i {
  font-size: 1rem;
  color: #0ea5e9;
}

.btn-practice-pdf:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(14, 165, 233, 0.32);
  background: linear-gradient(180deg, #f0f9ff 0%, #bae6fd 100%);
}

.practice-pdf-hint {
  margin: 0;
  padding: 0.45rem 0.65rem;
  font-size: 0.72rem;
  line-height: 1.45;
  color: #475569;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.08);
  max-width: 18rem;
}

.practice-pdf-hint strong {
  color: #0369a1;
}

/* 旧圆形打印钮：有 PDF 工具栏时隐藏 */
body.l13rc-practice-pdf .print-btn {
  display: none !important;
}

@media (max-width: 520px) {
  .practice-pdf-hint {
    display: none;
  }

  .btn-practice-pdf span {
    display: none;
  }

  .btn-practice-pdf {
    width: 44px;
    height: 44px;
    padding: 0;
    border-radius: 50%;
  }
}

/* —— 打印专用结构（屏幕隐藏） —— */
.practice-print-sheet {
  display: none;
}

@media print {
  @page {
    size: A4 portrait;
    margin: 12mm 14mm 14mm;
  }

  html.l13rc-no-scroll-root,
  html.l13rc-no-scroll-root body.l13rc-no-scroll {
    overflow: visible !important;
    height: auto !important;
    max-height: none !important;
  }

  body.l13rc-practice-one,
  body.l13rc-practice-printing {
    background: #fff !important;
    padding: 0 !important;
    --lesson-pager-gap: 0 !important;
    --l13rc-demo-stage-h: auto !important;
  }

  body.l13rc-practice-printing .practice-pdf-bar,
  body.l13rc-practice-printing .print-btn,
  body.l13rc-practice-printing #welcome-view,
  body.l13rc-practice-printing .btn-main,
  body.l13rc-practice-printing .practice-pager,
  body.l13rc-practice-printing nav.lesson-pager,
  body.l13rc-practice-printing .practice-answer-toggle {
    display: none !important;
  }

  body.l13rc-practice-printing #app-frame,
  body.l13rc-practice-printing #app-frame.practice-book {
    display: block !important;
    position: static !important;
    width: 100% !important;
    max-width: 100% !important;
    height: auto !important;
    max-height: none !important;
    min-height: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
    overflow: visible !important;
    border: none !important;
    box-shadow: none !important;
    border-radius: 0 !important;
    transform: none !important;
    background: #fff !important;
  }

  body.l13rc-practice-printing #app-frame .section-card {
    display: none !important;
  }

  body.l13rc-practice-printing .practice-page,
  body.l13rc-practice-printing .practice-page.l13rc-print-source-hidden {
    display: none !important;
  }

  body.l13rc-practice-printing .practice-print-sheet {
    display: block !important;
    width: 100% !important;
  }

  /* 封面 */
  body.l13rc-practice-printing .practice-print-cover {
    display: flex !important;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 2mm);
    page-break-after: always;
    break-after: page;
    text-align: center;
    padding: 18mm 10mm 14mm;
  }

  body.l13rc-practice-printing .practice-print-logo {
    width: auto;
    height: 52px;
    margin-bottom: 16px;
    object-fit: contain;
  }

  body.l13rc-practice-printing .practice-print-cover-banner {
    width: 100%;
    padding: 22px 20px 18px;
    border-radius: 16px;
    background: linear-gradient(135deg, #0ea5e9 0%, #10b981 55%, #06b6d4 100%);
    color: #fff;
    box-shadow: 0 8px 24px rgba(14, 165, 233, 0.22);
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  body.l13rc-practice-printing .practice-print-cover-kicker {
    margin: 0 0 8px;
    font-size: 10pt;
    font-weight: 700;
    letter-spacing: 0.06em;
    opacity: 0.95;
  }

  body.l13rc-practice-printing .practice-print-cover-title {
    margin: 0 0 10px;
    font-family: var(--font-family-title, 'Fredoka', sans-serif);
    font-size: 22pt;
    font-weight: 700;
    line-height: 1.2;
  }

  body.l13rc-practice-printing .practice-print-cover-sub {
    margin: 0;
    font-size: 10.5pt;
    line-height: 1.55;
    opacity: 0.96;
  }

  body.l13rc-practice-printing .practice-print-cover-stats {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin: 18px 0 0;
    padding: 0;
    list-style: none;
  }

  body.l13rc-practice-printing .practice-print-cover-stats li {
    padding: 6px 14px;
    border-radius: 999px;
    border: 2px solid #bae6fd;
    background: #f0f9ff;
    color: #0369a1;
    font-size: 9.5pt;
    font-weight: 800;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  body.l13rc-practice-printing .practice-print-cover-foot {
    margin: 20px 0 0;
    font-size: 8.5pt;
    color: #64748b;
    line-height: 1.5;
  }

  /* 每个 Part 独占一页 */
  body.l13rc-practice-printing .practice-print-part {
    display: flex !important;
    flex-direction: column;
    page-break-after: always;
    break-after: page;
    min-height: calc(100vh - 4mm);
    padding: 0 2mm 4mm;
  }

  body.l13rc-practice-printing .practice-print-part:last-child {
    page-break-after: auto;
  }

  body.l13rc-practice-printing .practice-print-part-head {
    margin-bottom: 14px;
    padding: 12px 14px 12px;
    border-radius: 12px;
    background: linear-gradient(90deg, #f0f9ff 0%, #ecfdf5 100%);
    border: 1px solid #bae6fd;
    border-left: 5px solid #0ea5e9;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  body.l13rc-practice-printing .practice-print-part-badge {
    display: inline-block;
    margin-bottom: 6px;
    padding: 3px 10px;
    border-radius: 999px;
    background: #0ea5e9;
    color: #fff;
    font-size: 9pt;
    font-weight: 800;
    letter-spacing: 0.04em;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  body.l13rc-practice-printing .practice-print-part-title {
    margin: 0 0 6px;
    font-family: var(--font-family-title, 'Fredoka', sans-serif);
    font-size: 15pt;
    font-weight: 700;
    color: #0f172a;
    line-height: 1.25;
  }

  body.l13rc-practice-printing .practice-print-instruction {
    margin: 0;
    font-size: 9.5pt;
    font-weight: 700;
    color: #475569;
    line-height: 1.5;
  }

  body.l13rc-practice-printing .practice-print-part-body {
    flex: 1 1 auto;
  }

  body.l13rc-practice-printing .practice-print-part-foot {
    flex-shrink: 0;
    margin-top: 12px;
    padding-top: 8px;
    border-top: 1px solid #e2e8f0;
    font-size: 8pt;
    color: #94a3b8;
    text-align: center;
  }

  body.l13rc-practice-printing .practice-print-item {
    margin-bottom: 1rem;
    padding-bottom: 0.85rem;
    border-bottom: 1px dashed #e2e8f0;
    break-inside: avoid;
    page-break-inside: avoid;
  }

  body.l13rc-practice-printing .practice-print-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
  }

  body.l13rc-practice-printing .practice-print-item .exercise-item {
    margin: 0;
    padding: 0;
    border: none;
  }

  body.l13rc-practice-printing .practice-print-item .instruction {
    font-size: 9.5pt;
    font-weight: 700;
    color: #334155;
    margin-bottom: 6px;
    line-height: 1.5;
  }

  body.l13rc-practice-printing .practice-print-item .sentence-box {
    font-size: 10.5pt;
    line-height: 1.6;
    color: #0f172a;
    font-weight: 600;
  }

  body.l13rc-practice-printing .practice-print-item .sentence-box ins {
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 2px;
  }

  body.l13rc-practice-printing .practice-print-item input[type="text"] {
    border: none;
    border-bottom: 1.5px solid #1e293b;
    background: transparent;
    font-size: 10pt;
    min-width: 8em;
    padding: 2px 4px;
  }

  body.l13rc-practice-printing .practice-print-item .choice-btn {
    display: block;
    width: 100%;
    text-align: left;
    margin: 4px 0;
    padding: 6px 10px;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    background: #f8fafc;
    color: #1e293b;
    font-size: 9.5pt;
    font-weight: 600;
    cursor: default;
    box-shadow: none;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  body.l13rc-practice-printing .practice-print-part-body,
  body.l13rc-practice-printing .l13rc-fit-target {
    transform: none !important;
    width: auto !important;
    max-width: 100% !important;
    height: auto !important;
    max-height: none !important;
    overflow: visible !important;
  }

  body.l13rc-practice-printing .practice-answer-panel[hidden] {
    display: none !important;
  }
}