/* 单词抄写作业 — 对齐外研版 3GB copy.html 版式 */
:root {
  --accent: #2e7d32;
  --accent-dark: #1b5e20;
  --accent-light: #66bb6a;
  --blue: #42a5f5;
  --blue-dark: #1565c0;
  --purple: #7e57c2;
  --cream: #f1f8e9;
  --ink: #2d3436;
  --muted: #636e72;
  --paper: #fffef8;
  --radius: 16px;
  --shadow: 0 4px 20px rgba(27, 94, 32, 0.1);
  --font: "Noto Sans SC", "Segoe UI", "PingFang SC", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

body.copy-page {
  font-family: var(--font);
  background-color: var(--cream);
  background-image: radial-gradient(circle, rgba(129, 199, 132, 0.28) 1.2px, transparent 1.2px);
  background-size: 18px 18px;
  min-height: 100vh;
  color: var(--ink);
  line-height: 1.6;
}

body.copy-page::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 80% 50% at 0% 0%, rgba(46, 125, 50, 0.1), transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 100%, rgba(255, 183, 77, 0.08), transparent 50%);
  pointer-events: none;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 24px 20px 48px;
}

.top-bar {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  gap: 8px 12px;
  align-items: center;
  margin-bottom: 8px;
}

.course-logo {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  line-height: 0;
  grid-column: 1;
  grid-row: 1;
  justify-self: start;
}

.course-logo img {
  height: 38px;
  width: auto;
  max-width: min(210px, 46vw);
  object-fit: contain;
  display: block;
}

.top-bar .back-link {
  grid-column: 2;
  grid-row: 1;
  justify-self: end;
}

.top-bar .page-title {
  grid-column: 1 / -1;
  grid-row: 2;
  justify-self: center;
  text-align: center;
  margin: 0;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--accent-dark);
  font-size: 0.92rem;
  font-weight: 600;
  padding: 9px 16px;
  background: var(--paper);
  border: 2px solid rgba(46, 125, 50, 0.25);
  border-radius: 999px;
  box-shadow: var(--shadow);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.back-link:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.page-title {
  font-size: clamp(1.4rem, 4vw, 2rem);
  font-weight: 700;
  color: var(--accent-dark);
  letter-spacing: -0.02em;
}

.page-title i {
  margin-right: 10px;
  color: #f9a825;
}

.card {
  background: var(--paper);
  border: 3px solid rgba(255, 255, 255, 0.9);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 20px;
}

.control-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 16px;
}

.control-row label {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--muted);
}

select {
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 10px 14px;
  border: 2px solid rgba(46, 125, 50, 0.22);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.92);
  min-height: 44px;
  color: var(--ink);
  flex: 1;
  min-width: 12rem;
}

select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(46, 125, 50, 0.15);
}

.trace-hint {
  font-size: 0.85rem;
  color: #b2bec3;
  text-align: center;
  margin-top: 8px;
}

.copy-legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 18px;
  font-size: 0.88rem;
  color: var(--muted);
  margin-bottom: 14px;
}

.copy-legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.copy-legend .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.copy-legend .dot.trace { background: rgba(144, 202, 249, 0.9); }
.copy-legend .dot.write { background: #fff; border: 2px solid var(--blue); }

.copy-toolbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 14px;
}

.btn {
  font-family: inherit;
  font-weight: 700;
  border: none;
  border-radius: 12px;
  padding: 10px 20px;
  min-height: 44px;
  cursor: pointer;
  font-size: 0.95rem;
  transition: transform 0.2s var(--ease);
}

.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: linear-gradient(135deg, #f9a825, #ffb74d);
  color: #fff;
}

.btn-outline {
  background: rgba(255, 255, 255, 0.9);
  color: var(--accent-dark);
  border: 2px solid rgba(46, 125, 50, 0.35);
}

.btn-sm {
  min-height: 36px;
  padding: 7px 14px;
  font-size: 0.88rem;
  border-radius: 10px;
}

.copy-workbook {
  max-width: 210mm;
  margin: 0 auto;
  padding: 1.2cm 15mm 15mm;
  box-sizing: border-box;
  background: #fff;
}

.copy-card {
  padding: 16px 0;
  overflow-x: auto;
}

.copy-unit-header {
  text-align: center;
  margin-bottom: 18px;
}

.copy-unit-header h2 {
  font-size: 1.15rem;
  color: var(--ink);
  margin-bottom: 6px;
}

.copy-sheet {
  max-width: 210mm;
  margin: 0 auto 20px;
  padding-bottom: 16px;
  border-bottom: 1px dashed #dfe6e9;
  break-inside: avoid;
  page-break-inside: avoid;
}

.copy-sheet:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

.copy-word-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 10px;
}

.copy-word-title {
  font-family: "Patrick Hand", cursive;
  font-size: 1.5rem;
  color: var(--blue-dark);
  letter-spacing: 1px;
}

.copy-word-cn {
  font-size: 0.95rem;
  color: var(--muted);
}

.copy-phoneme-row {
  border: 2px solid var(--purple);
  border-radius: 12px;
  padding: 8px 10px;
  background: #fff;
  margin-bottom: 10px;
}

.copy-phoneme-row .phoneme-boxes { margin: 0; }

.phoneme-boxes {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.copy-phoneme-row .phoneme-box {
  min-width: 44px;
  height: 44px;
  font-size: 0.9rem;
  cursor: default;
  color: color-mix(in srgb, var(--purple) 50%, white);
}

.phoneme-box {
  min-width: 52px;
  height: 52px;
  padding: 0 10px;
  border: 1.5px solid rgba(139, 92, 246, 0.35);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.9);
  color: var(--purple);
  white-space: nowrap;
}

.phoneme-box.silent {
  border-color: rgba(148, 163, 184, 0.4);
  color: #94a3b8;
  background: #f8fafc;
}

.copy-phoneme-row .phoneme-box:hover {
  background: rgba(255, 255, 255, 0.9);
  color: color-mix(in srgb, var(--purple) 50%, white);
  transform: none;
  box-shadow: none;
}

.copy-rows {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.copy-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.copy-cell {
  position: relative;
  border: 2px solid var(--blue);
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
}

.copy-line-grid {
  position: relative;
  height: 31mm;
  width: 100%;
}

.copy-line-grid .dl-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 0;
  margin: 0;
  padding: 0;
  border: none;
  display: block;
}

.copy-line-grid .dl-top { top: 25%; border-top: 1.5px solid #90CAF9; }
.copy-line-grid .dl-mid { top: 41.5%; border-top: 1.5px dashed rgba(33, 150, 243, 0.32); }
.copy-line-grid .dl-grass { top: 58%; border-top: 2.5px solid #90CAF9; }
.copy-line-grid .dl-base { top: 75%; border-top: 1.5px solid #EF9A9A; }

.copy-trace-text {
  position: absolute;
  left: 50%;
  top: 58%;
  transform: translate(-50%, calc(1.1mm - 100%));
  font-family: "Patrick Hand", cursive;
  font-weight: 700;
  font-size: 2.58rem;
  color: rgba(144, 202, 249, 0.55);
  white-space: nowrap;
  pointer-events: none;
  z-index: 0;
  line-height: 1;
}

.copy-cell-tag {
  position: absolute;
  top: 4px;
  left: 6px;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 999px;
  pointer-events: none;
  z-index: 1;
}

.copy-cell--trace .copy-cell-tag {
  background: rgba(144, 202, 249, 0.35);
  color: #1565c0;
}

.copy-cell--write .copy-cell-tag {
  background: #f1f2f6;
  color: var(--muted);
}

.no-print { }

@media (max-width: 520px) {
  .copy-row { grid-template-columns: 1fr; }
}

@page copy-homework {
  size: A4;
  margin: 1.2cm 15mm 15mm 15mm;
}

@media print {
  .top-bar, .control-row, .copy-toolbar, .copy-legend, .no-print,
  .copy-cell-tag, .copy-speak {
    display: none !important;
  }
  html,
  body.copy-print-body {
    margin: 0 !important;
    padding: 0 !important;
    background: #fff;
  }
  body.copy-print-body {
    page: copy-homework;
  }
  body.copy-print-body .container {
    max-width: none;
    padding: 0 !important;
    margin: 0 !important;
  }
  body.copy-print-body .card,
  body.copy-print-body .card.copy-card {
    box-shadow: none !important;
    border: none !important;
    background: transparent !important;
    padding: 0 !important;
    margin: 0 !important;
    break-inside: auto !important;
    page-break-inside: auto !important;
  }
  body.copy-print-body .copy-workbook {
    width: 100% !important;
    max-width: none !important;
    margin: 0 !important;
    padding: 0 !important;
    box-sizing: border-box;
  }
  .copy-unit-header { margin-bottom: 14px; }
  .copy-sheet {
    border-bottom: 1px solid #eee;
    margin-bottom: 6mm;
    padding-bottom: 5mm;
  }
  .copy-phoneme-row .phoneme-box,
  .copy-trace-text {
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
}