/* Aa 教具工坊 / 练习册：A4 打印 + 屏幕预览。全部手写体。 */
:root {
  --hand-en: "Patrick Hand", cursive;
  --hand-zh: "ZCOOL KuaiLe", "Ma Shan Zheng", cursive;
  --hand: "Patrick Hand", "ZCOOL KuaiLe", "Ma Shan Zheng", cursive;
  --sky-line: #64b5f6;
  --cloud-line: rgba(33, 150, 243, 0.38);
  --grass-line: #43a047;
  --dirt-line: #ef9a9a;
  --trace: rgba(33, 150, 243, 0.42);
  --onset: #e53935;
}

.hand, .workshop, .print-root, .wb-app {
  font-family: var(--hand);
}

.workshop {
  max-width: 1080px;
  margin: 0 auto;
  padding: 8px 16px 48px;
  font-family: "Source Sans 3", "PingFang SC", "Noto Sans SC", sans-serif;
}

.ws-lead {
  margin: 0 0 14px;
  font-size: 1.2rem;
  line-height: 1.45;
  color: #546e7a;
}

.tab-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 16px;
}
.tab {
  border: 2px solid #fff;
  background: rgba(255,255,255,0.82);
  border-radius: 999px;
  padding: 8px 16px;
  font: inherit;
  font-size: 1.12rem;
  cursor: pointer;
  box-shadow: 0 6px 16px rgba(55,71,79,.1);
  color: #37474f;
}
.tab.is-on {
  background: linear-gradient(135deg, #e53935, #ff7043);
  color: #fff;
  border-color: #ffccbc;
}
.pack-intro {
  background: rgba(255,255,255,0.9);
  border: 3px solid #fff;
  border-radius: 24px;
  padding: 16px 18px 14px;
  box-shadow: 0 12px 32px rgba(55,71,79,.12);
  margin-bottom: 14px;
}
.pack-intro h2 {
  margin: 0 0 10px;
  font-family: "Source Serif 4", "Songti SC", Georgia, serif;
  font-size: 1.45rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}
.pack-intro p { margin: 0 0 10px; color: #546e7a; font-size: 1.05rem; line-height: 1.45; }
.pack-intro ul { margin: 0 0 12px; padding-left: 1.2em; color: #455a64; font-size: 1.08rem; }
.pack-intro li { margin: 4px 0; }
.hint-print {
  background: #fff8e1;
  border: 2px dashed #ffcc80;
  border-radius: 16px;
  padding: 10px 12px;
  font-size: 1.05rem;
  color: #ef6c00;
  margin: 8px 0 0;
}

.copy-picker-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 8px 0 12px;
}
.copy-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 2px solid #eceff1;
  background: #fff;
  border-radius: 999px;
  padding: 6px 12px 6px 6px;
  cursor: pointer;
  font: inherit;
  font-size: 1.12rem;
}
.copy-chip img {
  width: 36px; height: 36px;
  object-fit: contain;
  border-radius: 50%;
  background: #fffde7;
}
.copy-chip.is-on {
  border-color: #43a047;
  background: #e8f5e9;
}
.copy-chip input { width: 18px; height: 18px; }

.preview-label {
  text-align: center;
  color: #607d8b;
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 18px 0 0;
  font-family: "Source Sans 3", sans-serif;
}

.print-root { padding-bottom: 40px; }
.pack { display: none; }
.pack.is-on { display: block; }

.sheet-frame {
  width: min(210mm, calc(100vw - 24px));
  margin: 16px auto;
  position: relative;
}
.sheet {
  width: 210mm;
  height: 297mm;
  padding: 11mm 12mm 10mm;
  background:
    radial-gradient(circle at 8% 6%, rgba(255, 213, 79, 0.38), transparent 26%),
    radial-gradient(circle at 96% 3%, rgba(129, 199, 132, 0.32), transparent 24%),
    radial-gradient(circle at 90% 96%, rgba(239, 154, 154, 0.28), transparent 28%),
    linear-gradient(180deg, #fffdf6 0%, #ffffff 42%, #fff8e8 100%);
  color: #37474f;
  font-family: var(--hand);
  box-sizing: border-box;
  overflow: hidden;
  position: relative;
  transform-origin: top left;
  box-shadow: 0 16px 40px rgba(38, 50, 56, 0.18);
  border-radius: 6px;
}
.sheet.theme-sky {
  background:
    radial-gradient(circle at 12% 8%, rgba(79, 195, 247, 0.35), transparent 28%),
    radial-gradient(circle at 94% 8%, rgba(255, 241, 118, 0.4), transparent 26%),
    linear-gradient(180deg, #e3f2fd 0%, #fff 38%, #fffde7 100%);
}
.sheet.theme-leaf {
  background:
    radial-gradient(circle at 10% 5%, rgba(197, 225, 165, 0.55), transparent 30%),
    linear-gradient(180deg, #f1f8e9 0%, #fff 40%, #fff8e1 100%);
}
.sheet.theme-candy {
  background:
    radial-gradient(circle at 8% 10%, rgba(244, 143, 177, 0.35), transparent 26%),
    radial-gradient(circle at 92% 6%, rgba(128, 222, 234, 0.35), transparent 24%),
    linear-gradient(180deg, #fce4ec 0%, #fff 36%, #e8f5e9 100%);
}
.sheet.theme-poster {
  background:
    radial-gradient(circle at 50% 20%, rgba(255, 236, 179, 0.7), transparent 40%),
    linear-gradient(165deg, #ff8a80 0%, #ffd54f 42%, #81c784 100%);
}
.sheet.theme-poster-a {
  background:
    radial-gradient(circle at 50% 18%, #fff8e1 0%, transparent 42%),
    linear-gradient(160deg, #e53935 0%, #ff7043 40%, #ffcc80 100%);
}
.sheet.theme-poster-s {
  background:
    radial-gradient(circle at 50% 18%, #e8f5e9 0%, transparent 42%),
    linear-gradient(160deg, #2e7d32 0%, #66bb6a 45%, #dce775 100%);
}

.rainbow-bar {
  height: 5mm;
  border-radius: 999px;
  background: linear-gradient(90deg, #e53935, #fb8c00, #fdd835, #43a047, #1e88e5, #8e24aa);
  margin-bottom: 4mm;
}
.sh-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 3mm;
}
.sh-kicker {
  margin: 0;
  font-size: 13pt;
  color: #00897b;
  letter-spacing: 0.04em;
}
.sh-title {
  margin: 0;
  font-size: 26pt;
  line-height: 1.05;
  color: #c62828;
  font-weight: 400;
}
.sh-badge {
  flex-shrink: 0;
  background: #fff;
  border: 2px solid #ffcc80;
  border-radius: 999px;
  padding: 2mm 4mm;
  font-size: 13pt;
  color: #ef6c00;
}
.name-row {
  display: flex;
  gap: 8mm;
  font-size: 14pt;
  margin: 0 0 4mm;
  color: #546e7a;
}
.name-row span {
  display: inline-flex;
  align-items: baseline;
  gap: 2mm;
}
.name-row i {
  display: inline-block;
  border-bottom: 1.5px solid #b0bec5;
  min-width: 38mm;
  height: 1.05em;
  font-style: normal;
}

.task {
  display: flex;
  align-items: flex-start;
  gap: 3mm;
  margin: 0 0 3.5mm;
}
.task .n {
  width: 9mm; height: 9mm;
  border-radius: 50%;
  background: #e53935;
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 15pt;
  flex-shrink: 0;
  margin-top: 0.5mm;
}
.task.leaf .n { background: #43a047; }
.task.sky .n { background: #039be5; }
.task.sun .n { background: #fb8c00; }
.task p { margin: 0; font-size: 15pt; line-height: 1.25; }

.hero-row {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 5mm;
  align-items: center;
  margin: 2mm 0 4mm;
}
.hero-row img, .tile img, .pic-tile img, .cut-card img, .fold-pic img {
  width: 100%;
  display: block;
  object-fit: contain;
}
.bubble {
  background: #fff;
  border-radius: 8mm;
  padding: 5mm 6mm;
  border: 2.5px solid #ffcc80;
  box-shadow: 0 4px 0 #ffe082;
  font-size: 18pt;
  text-align: center;
}
.bubble b { color: #e53935; }
.aa-mini {
  background: linear-gradient(180deg, #fff, #f1f8e9);
  border: 3px solid #fff;
  border-radius: 8mm;
  text-align: center;
  padding: 4mm;
  box-shadow: 0 8px 18px rgba(0,0,0,.08);
}
.aa-mini .big { font-size: 42pt; line-height: 0.95; color: #b71c1c; }
.aa-mini .ipa { font-size: 22pt; color: #2e7d32; }

.vocab-4, .grid-2, .grid-3, .grid-4, .circle-grid, .six-grid {
  display: grid;
  gap: 4mm;
}
.vocab-4, .grid-2, .six-grid { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: 1fr 1fr 1fr; }
.grid-4, .circle-grid { grid-template-columns: 1fr 1fr 1fr; }
.six-grid { grid-template-columns: 1fr 1fr 1fr; }

.pic-tile, .tile {
  background: #fff;
  border-radius: 6mm;
  padding: 3mm;
  text-align: center;
  border: 2.4px solid #fff;
  box-shadow: 0 3px 0 rgba(0,0,0,.06);
  position: relative;
}
.pic-tile img, .tile img { height: 38mm; object-fit: contain; }
.pic-tile .lab, .tile .lab {
  font-size: 16pt;
  margin-top: 1mm;
}
.pic-tile .lab b, .onset { color: var(--onset); }
.pic-tile.t0 { background: #fff3e0; }
.pic-tile.t1 { background: #e8f5e9; }
.pic-tile.t2 { background: #e3f2fd; }
.pic-tile.t3 { background: #fce4ec; }
.pic-tile.t4 { background: #f3e5f5; }
.pic-tile.t5 { background: #fffde7; }

.circ-wrap { position: relative; }
.circ-wrap .ring {
  position: absolute; inset: 1mm;
  border: 2.6px solid #e53935;
  border-radius: 50%;
  pointer-events: none;
}
.circ-wrap .ring.sample { border-style: dashed; opacity: 0.9; }

.write-box {
  margin-top: 2mm;
  height: 11mm;
  border: 2px dashed #90caf9;
  border-radius: 3mm;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16pt;
  color: #90caf9;
}

/* 四线格：与 Lesson 02「四线格字母抄写」同一套行高 / 格带 / 字号比例 */
.stave-line {
  --row-h: 24mm;
  --stave-fs: calc(var(--row-h) * 0.51);
  position: relative;
  height: var(--row-h);
  min-height: var(--row-h);
  max-height: var(--row-h);
  margin: 0 0 2.2mm;
  background: #fff;
  border-radius: 2mm;
  overflow: hidden;
  border: 1px solid #eceff1;
}
.stave-line.sm { --row-h: 20mm; }
.grid-lines {
  position: absolute;
  top: 25%;
  height: 50%;
  left: 4mm;
  right: 4mm;
  pointer-events: none;
  z-index: 2;
}
.gl { position: absolute; left: 0; right: 0; height: 0; }
.gl-sky { top: 0; border-top: 1.3pt solid var(--sky-line); }
.gl-cloud { top: 33%; border-top: 1.3pt dashed var(--cloud-line); }
.gl-grass { top: 67%; border-top: 2.8pt solid var(--sky-line); }
.gl-dirt { top: 100%; border-top: 1.3pt solid var(--dirt-line); }
.stave-tag {
  position: absolute;
  left: 1.5mm;
  top: 1mm;
  font-size: 9pt;
  color: #90a4ae;
  z-index: 2;
}
.stave-ghost-cv {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}
.trace-word, .model-letter {
  position: absolute;
  inset: 0 6mm 0 14mm;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  font-family: var(--hand-en);
  font-size: var(--stave-fs);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0;
  color: var(--trace);
  z-index: 1;
  transform: translateY(-1.4mm);
  white-space: nowrap;
}
.stave-line.is-fitted > .trace-word {
  opacity: 0;
}
.trace-word .onset { color: #e53935; }
.trace-word .rest { color: rgba(144, 202, 249, 0.85); }
.trace-word.center, .model-letter { justify-content: center; inset: 0; }
.letter-pair {
  display: inline-flex;
  align-items: baseline;
  gap: 0.12em;
  line-height: 1;
}
.letter-pair::before {
  content: "A";
  font-size: 1em;
  visibility: hidden;
  width: 0;
  overflow: hidden;
  pointer-events: none;
}
.letter-cap {
  display: inline-block;
  transform: translateY(-0.5mm);
}
.letter-small {
  font-size: 0.78em;
  display: inline-block;
  transform: translateY(-1.2mm);
}
.fs-lg, .fs-md, .fs-sm, .fs-xs { font-size: var(--stave-fs); }
.rest { color: rgba(96, 125, 139, 0.45); }

.copy-hero {
  display: grid;
  grid-template-columns: 42mm 1fr;
  gap: 5mm;
  align-items: center;
  margin: 0 0 4mm;
  background: #fff;
  border-radius: 6mm;
  padding: 3mm 4mm;
  border: 2px solid #ffe082;
}
.copy-hero img { height: 36mm; object-fit: contain; }
.copy-hero .en { font-size: 28pt; margin: 0; color: #c62828; }
.copy-hero .zh { margin: 0; font-size: 16pt; color: #546e7a; }
.copy-hero .ipa { margin: 2mm 0 0; font-size: 16pt; color: #2e7d32; }

.letter-models {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5mm;
  margin-bottom: 3.5mm;
}
.model-card {
  background: #fff;
  border-radius: 6mm;
  padding: 2.2mm 3mm 2.6mm;
  border: 2px solid #fff59d;
}
.model-title {
  font-size: 14pt;
  color: #c62828;
  line-height: 1.1;
}
.model-hint {
  margin: 0.6mm 0 1.5mm;
  font-size: 11pt;
  color: #78909c;
  line-height: 1.25;
}
.stave-line.model-stave {
  --row-h: 40mm;
  margin: 0;
  border-radius: 3mm;
}

.balloon-board {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4mm;
  margin: 2mm 0 4mm;
}
.balloon {
  aspect-ratio: 0.78;
  border-radius: 50% 50% 50% 50% / 42% 42% 58% 58%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18mm;
  font-family: var(--hand-en);
  background: #fff;
  border: 2.5px dashed #b0bec5;
  color: #90a4ae;
  position: relative;
}
.balloon.is-a { border-color: #b0bec5; color: #90a4ae; background: #fff; }
.balloon:nth-child(1) { background: #fff3e0; }
.balloon:nth-child(2) { background: #e8f5e9; }
.balloon:nth-child(3) { background: #e3f2fd; }
.balloon:nth-child(4) { background: #f3e5f5; }
.balloon:nth-child(5) { background: #fce4ec; }
.balloon:nth-child(6) { background: #fffde7; }
.balloon:nth-child(7) { background: #e0f2f1; }
.balloon:nth-child(8) { background: #fbe9e7; }
.balloon::after {
  content: "";
  position: absolute;
  bottom: -6mm;
  width: 0; height: 6mm;
  border-left: 1.4px solid #bcaaa4;
}

.odd-row {
  display: grid;
  grid-template-columns: 8mm minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: 3mm;
  align-items: center;
  margin-bottom: 3.5mm;
  min-width: 0;
}
.odd-row > .n {
  font-size: 16pt;
  color: #e53935;
  font-weight: 700;
  text-align: center;
  line-height: 1;
}
.odd-row .tile {
  min-width: 0;
  overflow: hidden;
}
.odd-row .tile img {
  height: 28mm;
  width: auto;
  max-width: 100%;
  object-fit: contain;
}
.odd-row .tile.t0 { background: #fff3e0; }
.odd-row .tile.t1 { background: #e8f5e9; }
.odd-row .tile.t2 { background: #e3f2fd; }

.sheet.match-game {
  padding-bottom: 14mm;
}
.match-cols {
  display: grid;
  grid-template-columns: 1fr 16mm 1fr;
  gap: 4mm;
  align-items: stretch;
  margin: 1mm 0 2mm;
}
.match-col {
  display: grid;
  grid-template-rows: repeat(4, 32mm);
  gap: 5mm;
  min-height: 0;
}
.match-col .row {
  display: grid;
  grid-template-columns: 8mm minmax(0, 1fr);
  gap: 2mm;
  align-items: stretch;
  margin: 0;
  background: #fff;
  border: 1.6px solid #ffcc80;
  border-radius: 4mm;
  padding: 2mm 2.5mm;
  min-height: 0;
  box-sizing: border-box;
}
.match-col .row > b {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16pt;
  color: #e53935;
}
.match-col img {
  width: 100%;
  height: 100%;
  min-height: 0;
  object-fit: contain;
  display: block;
  align-self: stretch;
}
.match-col .row.is-word {
  display: flex;
  align-items: center;
  justify-content: center;
}
.match-mid {
  min-height: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0 7mm,
    rgba(144, 202, 249, 0.45) 7mm 7.4mm
  );
  border-radius: 4mm;
}
.word-chip {
  font-size: 22pt;
  text-align: center;
  line-height: 1.1;
}

.cut-marks { border: 1.4px dashed #b0bec5; }
.cut-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  height: 220mm;
  gap: 0;
}
.cut-card {
  border: 1px dashed #90a4ae;
  padding: 6mm;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: rgba(255,255,255,0.55);
}
.cut-card img { height: 58mm; object-fit: contain; }
.cut-card .lab { font-size: 22pt; margin-top: 3mm; }
.cut-card.word-only .lab { font-size: 42pt; color: #c62828; }
.cut-card .zh {
  margin-top: 3mm;
  font-size: 24pt;
  color: #546e7a;
}
.mini-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: repeat(4, 1fr);
  height: 220mm;
}
.mini-grid .cut-card img { height: 32mm; }
.mini-grid .cut-card .lab { font-size: 16pt; }
.mini-grid .cut-card.word-only .lab { font-size: 26pt; }

.fold-page {
  display: flex;
  flex-direction: column;
  height: 276mm;
  gap: 4mm;
}
.fold-card {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 2px dashed #8d6e63;
  border-radius: 5mm;
  overflow: hidden;
  background: #fff;
  position: relative;
}
.fold-mid {
  position: absolute;
  top: 4mm; bottom: 4mm;
  left: 50%;
  width: 0;
  border-left: 2px dashed #e53935;
  z-index: 2;
}
.fold-tag {
  position: absolute;
  top: 2mm;
  left: 50%;
  transform: translateX(-50%);
  background: #ffe082;
  padding: 0 3mm;
  font-size: 11pt;
  border-radius: 999px;
  z-index: 3;
  color: #e65100;
}
.fold-pic, .fold-word {
  padding: 8mm 6mm;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.fold-pic { background: #fff8e1; }
.fold-word { background: #e8f5e9; }
.fold-pic img { height: 78mm; object-fit: contain; }
.fold-word .en { font-size: 28pt; color: #c62828; line-height: 1.05; text-align: center; }
.fold-word .zh { font-size: 16pt; color: #546e7a; }
.fold-word .ipa { font-size: 18pt; color: #2e7d32; margin-top: 2mm; }

.letter-poster {
  height: 250mm;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #fff;
  text-align: center;
}
.letter-poster .giant {
  font-size: 118mm;
  line-height: 0.82;
  font-family: var(--hand-en);
  text-shadow: 0 6px 0 rgba(0,0,0,.12);
}
.letter-poster .sub { font-size: 28pt; margin-top: 2mm; }
.letter-poster img {
  width: 48mm; height: 48mm;
  object-fit: contain;
  background: #fff;
  border-radius: 50%;
  padding: 3mm;
  margin-top: 4mm;
}

.howto {
  font-size: 13.5pt;
  line-height: 1.35;
  margin: 0;
  padding-left: 6mm;
}
.howto li { margin: 2.2mm 0; }
.howto b { color: #c62828; }

.foot {
  position: absolute;
  left: 12mm; right: 12mm; bottom: 6mm;
  display: flex;
  justify-content: space-between;
  font-size: 11pt;
  color: #90a4ae;
}

.chant-path {
  display: grid;
  grid-template-columns: 1fr 12mm 1fr 12mm 1fr 12mm 1fr;
  align-items: center;
  gap: 1mm;
  margin-top: 3mm;
}
.chant-path .arrow { text-align: center; font-size: 18pt; color: #e53935; }
.num-box {
  width: 10mm; height: 10mm;
  border: 2px solid #43a047;
  border-radius: 3mm;
  margin: 2mm auto 0;
  background: #fff;
}

.trace-legend {
  display: flex;
  gap: 8mm;
  font-size: 13pt;
  color: #607d8b;
  margin: 0 0 3mm;
}
.trace-legend i {
  display: inline-block;
  width: 7mm; height: 4mm;
  border-radius: 2mm;
  vertical-align: middle;
  margin-right: 1.5mm;
}
.trace-legend .t { background: rgba(33,150,243,.35); border: 1px solid #90caf9; }
.trace-legend .w { background: #fff; border: 1px solid #43a047; }

/* —— 教材 PDF：国际出版风，仅作用于教材包 —— */
.pack-book .sheet.book-sheet {
  font-family: "Source Sans 3", "PingFang SC", "Noto Sans SC", sans-serif;
  color: #1b1916;
  background: #f6f3ec;
  padding: 16mm 18mm 14mm;
  display: flex;
  flex-direction: column;
}
.pack-book .sheet.book-sheet::after {
  content: "";
  position: absolute;
  inset: 8mm;
  border: 0.4pt solid #cfc6b6;
  pointer-events: none;
  z-index: 0;
}
.pack-book .bk-foot {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-top: 7mm;
  padding-top: 3.5mm;
  font-size: 8.5pt;
  letter-spacing: 0.06em;
  text-transform: none;
  color: #6f6a63;
  flex-shrink: 0;
}
.pack-book .bk-foot-meta b {
  font-weight: 700;
  color: #1b1916;
  letter-spacing: 0.02em;
}
.pack-book .bk-foot-page {
  letter-spacing: 0.12em;
  font-variant-numeric: tabular-nums;
}
.pack-book .bk-head {
  display: flex;
  align-items: baseline;
  gap: 5mm;
  margin: 0 0 8mm;
  padding-bottom: 3.5mm;
  border-bottom: 0.4pt solid #cfc6b6;
  flex-shrink: 0;
}
.pack-book .bk-kicker {
  margin: 0;
  font-family: "Source Sans 3", "Source Sans Pro", sans-serif;
  font-size: 11pt;
  letter-spacing: 0.08em;
  text-transform: none;
  color: #9b2335;
  font-weight: 700;
  font-variant-numeric: lining-nums;
  min-width: 8mm;
}
.pack-book .bk-title {
  margin: 0;
  font-family: "Fraunces", "Source Serif 4", Georgia, "Times New Roman", serif;
  font-size: 26pt;
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.05;
  color: #1b1916;
}
.pack-book .book-cover {
  align-items: center;
  text-align: center;
  padding-top: 10mm;
}
.pack-book .bk-brand {
  margin: 2mm 0 0;
  font-size: 11.5pt;
  letter-spacing: 0.36em;
  text-transform: uppercase;
  color: #1b1916;
  font-weight: 700;
}
.pack-book .bk-unit {
  margin: 4mm 0 0;
  font-size: 10pt;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: #6f6a63;
}
.pack-book .bk-display {
  margin: 8mm 0 0;
  font-family: "Fraunces", "Source Serif 4", Georgia, "Times New Roman", serif;
  font-size: 72pt;
  font-weight: 500;
  line-height: 0.88;
  letter-spacing: -0.045em;
  color: #1b1916;
}
.pack-book .bk-display-hand {
  margin: 2mm 0 0;
  font-family: "Patrick Hand", "ZCOOL KuaiLe", cursive;
  font-size: 42pt;
  font-weight: 400;
  line-height: 0.95;
  letter-spacing: 0.02em;
  color: #1b1916;
}
.pack-book .bk-phrase {
  margin: 3.5mm 0 0;
  font-family: "Fraunces", Georgia, "Times New Roman", serif;
  font-style: italic;
  font-size: 18pt;
  font-weight: 500;
  color: #3f3a34;
}
.pack-book .bk-ipa {
  margin: 1.5mm 0 0;
  font-family: "Source Serif 4", Georgia, "Times New Roman", serif;
  font-size: 14pt;
  color: #6f6a63;
}
.pack-book .bk-hero {
  width: 100%;
  max-width: 148mm;
  margin: 8mm auto 0;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
}
.pack-book .bk-hero img {
  width: 100%;
  max-height: 108mm;
  object-fit: contain;
}
.pack-book .bk-words {
  margin: 5mm 0 7mm;
  font-family: "Source Serif 4", Georgia, "Times New Roman", serif;
  font-size: 11.5pt;
  letter-spacing: 0.12em;
  color: #5c574f;
}
.pack-book .book-cover .name-row {
  width: 100%;
  justify-content: center;
  font-family: "Source Sans 3", sans-serif;
  font-size: 9pt;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #6f6a63;
  margin: 0;
}
.pack-book .name-row i {
  border-bottom: 0.5pt solid #cfc6b6;
  min-width: 30mm;
}
.pack-book .bk-split {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 7mm;
  align-items: stretch;
  margin: 0 0 8mm;
  min-height: 0;
}
.pack-book .bk-plate {
  margin: 0;
  background: #fff;
  border: 0.4pt solid #d7d0c4;
  padding: 5mm 5mm 4mm;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.pack-book .bk-plate img {
  width: 100%;
  flex: 1 1 auto;
  height: auto;
  min-height: 0;
  object-fit: contain;
  display: block;
}
.pack-book .bk-caption {
  margin: 3mm 0 0;
  font-family: "Fraunces", Georgia, "Times New Roman", serif;
  font-style: italic;
  font-size: 13pt;
  font-weight: 500;
  color: #3f3a34;
  text-align: center;
}
.pack-book .bk-letter {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3mm;
  min-height: 0;
  background: #fff;
  border: 0.4pt solid #d7d0c4;
  padding: 4mm 3mm;
}
.pack-book .bk-faces {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3mm;
  width: 100%;
  align-items: end;
}
.pack-book .bk-face {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5mm;
  min-width: 0;
}
.pack-book .bk-face .face-lab {
  margin: 0;
  font-family: "Source Sans 3", sans-serif;
  font-size: 7pt;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #8a847c;
  font-weight: 600;
}
.pack-book .bk-face.is-print .pair {
  font-family: "Fraunces", Georgia, "Times New Roman", serif;
  font-size: 42pt;
  font-weight: 500;
  line-height: 0.9;
  letter-spacing: -0.04em;
}
.pack-book .bk-face.is-hand .pair {
  font-family: "Patrick Hand", "ZCOOL KuaiLe", cursive;
  font-size: 46pt;
  font-weight: 400;
  line-height: 0.9;
  letter-spacing: 0.02em;
}
.pack-book .bk-letter .ipa {
  font-family: "Source Serif 4", Georgia, "Times New Roman", serif;
  font-size: 16pt;
  color: #6f6a63;
}
.pack-book .bk-vocab .pic-tile,
.pack-book .bk-vocab .tile {
  background: #fff;
  border: 0.4pt solid #d7d0c4;
  border-radius: 0;
  box-shadow: none;
  padding: 5mm 4mm 4mm;
}
.pack-book .pic-tile.t0,
.pack-book .pic-tile.t1,
.pack-book .pic-tile.t2,
.pack-book .pic-tile.t3,
.pack-book .pic-tile.t4,
.pack-book .pic-tile.t5 {
  background: #fff;
}
.pack-book .pic-tile img,
.pack-book .tile img {
  height: 42mm;
}
.pack-book .pic-tile .lab,
.pack-book .tile .lab {
  margin-top: 2.5mm;
  color: #1b1916;
}
.pack-book .lab-faces {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4mm;
}
.pack-book .lab-print {
  font-family: "Source Serif 4", Georgia, "Times New Roman", serif;
  font-size: 22pt;
  line-height: 1.05;
  letter-spacing: 0.01em;
}
.pack-book .lab-hand {
  font-family: "Patrick Hand", "ZCOOL KuaiLe", cursive;
  font-size: 28pt;
  line-height: 1.05;
  letter-spacing: 0.03em;
}
.pack-book .lab-print .rest,
.pack-book .lab-hand .rest {
  color: #4a4540;
}
.pack-book .onset { color: #9b2335; }
.pack-book .model-title,
.pack-book .model-hint { display: none; }
.pack-book .letter-models {
  gap: 6mm;
  margin-bottom: 6mm;
  flex-shrink: 0;
}
.pack-book .model-card {
  background: #fff;
  border: 0.4pt solid #d7d0c4;
  border-radius: 0;
  padding: 3mm;
}
.pack-book .stave-line.model-stave {
  --row-h: 48mm;
  border: 0;
  border-radius: 0;
}
.pack-book .stave-line {
  border: 0.4pt solid #e2ddd3;
  border-radius: 0;
  background: #fff;
}
.pack-book .stave-tag {
  font-family: "Source Sans 3", sans-serif;
  font-size: 7pt;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #8a847c;
}
.pack-book .write-box {
  border: 0.5pt solid #cfc6b6;
  border-radius: 0;
  color: #a39d94;
  font-family: "Source Serif 4", Georgia, "Times New Roman", serif;
  font-size: 10.5pt;
  letter-spacing: 0.08em;
  background: #fff;
}
.pack-book .num-box {
  border: 0.6pt solid #1b1916;
  border-radius: 0;
  margin-top: 3mm;
  height: 12mm;
}
.pack-book .six-grid { gap: 5mm; }
.pack-book .vocab-4 { gap: 5mm; }
.pack-book .bk-split,
.pack-book .bk-hero,
.pack-book .bk-vocab {
  flex: 1 1 0;
  min-height: 0;
}
.pack-book .bk-vocab {
  align-content: stretch;
}
.pack-book .bk-vocab.vocab-4 {
  grid-template-rows: 1fr 1fr;
}
.pack-book .bk-vocab.six-grid {
  grid-template-rows: 1fr 1fr;
}
.pack-book .bk-vocab .pic-tile {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.pack-book .bk-vocab .pic-tile img {
  flex: 1 1 auto;
  height: auto;
  min-height: 32mm;
  max-height: 82mm;
  object-fit: contain;
}

.pack-book .bk-section {
  margin: 0 0 3mm;
  font-family: "Source Sans 3", sans-serif;
  font-size: 9pt;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #8a847c;
  font-weight: 600;
  flex-shrink: 0;
}
.pack-book .bk-section .bk-ipa-inline,
.pack-book .bk-section .bk-keep-case {
  text-transform: none;
  letter-spacing: 0.04em;
}
.pack-book .bk-section .bk-ipa-inline {
  font-family: "Source Serif 4", "Times New Roman", serif;
  font-style: italic;
  font-weight: 600;
  font-size: 11pt;
  letter-spacing: 0.02em;
}

.pack-book .bk-match {
  flex: 1 1 0;
  min-height: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8mm;
  align-items: stretch;
}
.pack-book .bk-match-col {
  display: flex;
  flex-direction: column;
  gap: 4mm;
  min-height: 0;
}
.pack-book .bk-match-row {
  flex: 1 1 0;
  min-height: 0;
  display: grid;
  grid-template-columns: 9mm 1fr;
  gap: 3mm;
  align-items: center;
  background: #fff;
  border: 0.4pt solid #d7d0c4;
  padding: 3mm 4mm;
}
.pack-book .bk-match-row b {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 13pt;
  font-weight: 600;
  color: #9b2335;
  text-align: center;
}
.pack-book .bk-match-row img {
  width: 100%;
  height: 100%;
  max-height: 38mm;
  object-fit: contain;
  display: block;
}
.pack-book .bk-match-row .lab-print { font-size: 16pt; }
.pack-book .bk-match-row .lab-hand { font-size: 20pt; }

.pack-book .bk-choose {
  flex: 1 1 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 4mm;
}
.pack-book .bk-choose-row {
  flex: 1 1 0;
  min-height: 0;
  display: grid;
  grid-template-columns: 46mm 1fr 1fr 1fr;
  gap: 3.5mm;
  align-items: stretch;
}
.pack-book .bk-choose-prompt,
.pack-book .bk-opt {
  position: relative;
  background: #fff;
  border: 0.4pt solid #d7d0c4;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3mm;
  min-height: 0;
}
.pack-book .bk-choose-prompt .lab-print { font-size: 16pt; }
.pack-book .bk-choose-prompt .lab-hand { font-size: 20pt; }
.pack-book .bk-choose-prompt.is-pic img,
.pack-book .bk-opt img {
  width: 100%;
  height: auto;
  max-height: 100%;
  object-fit: contain;
  flex: 1 1 auto;
  min-height: 0;
}
.pack-book .bk-opt.is-word .lab-print { font-size: 14pt; }
.pack-book .bk-opt.is-word .lab-hand { font-size: 18pt; }
.pack-book .bk-ring {
  position: absolute;
  inset: 1.5mm;
  border: 0.5pt dashed #cfc6b6;
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
}
.pack-book .bk-ring.is-sample {
  border: 1.1pt solid #9b2335;
  border-style: dashed;
}

.pack-book .bk-maze-clues {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 3mm;
  margin: 0 0 5mm;
  flex-shrink: 0;
}
.pack-book .bk-maze-clue {
  background: #fff;
  border: 0.4pt solid #d7d0c4;
  padding: 2.5mm 2mm;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5mm;
}
.pack-book .bk-maze-clue img {
  height: 22mm;
  object-fit: contain;
}
.pack-book .bk-maze-clue .lab-print { font-size: 11pt; }
.pack-book .bk-maze-clue .lab-hand { font-size: 14pt; }
.pack-book .bk-maze {
  flex: 1 1 0;
  min-height: 0;
  display: grid;
  grid-template-rows: repeat(10, 1fr);
  gap: 0;
  border: 0.4pt solid #d7d0c4;
  background: #fff;
  align-content: stretch;
}
.pack-book .bk-maze-cell {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Source Serif 4", Georgia, "Times New Roman", serif;
  font-size: 13pt;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: #1b1916;
  border-right: 0.3pt solid #e6e1d6;
  border-bottom: 0.3pt solid #e6e1d6;
}

.pack-book .bk-copy-page {
  flex: 1 1 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 5mm;
}
.pack-book .bk-copy-item {
  flex: 1 1 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 2mm;
}
.pack-book .bk-copy-meta {
  display: grid;
  grid-template-columns: 28mm 1fr;
  gap: 4mm;
  align-items: center;
  background: #fff;
  border: 0.4pt solid #d7d0c4;
  padding: 2.5mm 4mm;
  flex-shrink: 0;
}
.pack-book .bk-copy-meta img {
  height: 22mm;
  width: 100%;
  object-fit: contain;
}
.pack-book .bk-copy-meta .lab-faces {
  align-items: flex-start;
}
.pack-book .bk-copy-meta .lab-print { font-size: 18pt; }
.pack-book .bk-copy-meta .lab-hand { font-size: 22pt; }
.pack-book .bk-copy-item .stave-line {
  flex: 1 1 0;
  --row-h: 22mm;
  height: auto;
  min-height: 20mm;
  max-height: none;
  margin: 0;
}

.pack-book .bk-picnic {
  flex: 1 1 0;
  min-height: 0;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 4mm;
  padding: 5mm;
  margin: 0 0 5mm;
  background:
    repeating-conic-gradient(#efe9dc 0% 25%, #f7f3ea 0% 50%)
    50% / 12mm 12mm;
  border: 0.4pt solid #d7d0c4;
}
.pack-book .bk-picnic .bk-opt {
  background: #fff;
}
.pack-book .bk-picnic .bk-opt img {
  max-height: 36mm;
}
.pack-book .bk-balloons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 9mm 5mm;
  flex: 0 0 auto;
  padding: 2mm 2mm 7mm;
}
.pack-book .bk-balloon {
  aspect-ratio: 0.78;
  max-height: 34mm;
  border-radius: 50% 50% 50% 50% / 42% 42% 58% 58%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Fraunces", Georgia, serif;
  font-size: 22pt;
  font-weight: 500;
  color: #1b1916;
  background: #fff;
  border: 0.7pt solid #8a847c;
  position: relative;
}
.pack-book .bk-balloon::after {
  content: "";
  position: absolute;
  bottom: -5mm;
  width: 0;
  height: 5mm;
  border-left: 0.5pt solid #b7b1a6;
}

.letter-stage {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 10px 0 12px;
}
.letter-stage .caption {
  margin: 0 0 6px;
  font-size: 1.05rem;
}
.wb-stave {
  --row-h: 48mm;
  width: 100%;
}
.wb-stave canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.wb-stave .trace-ghost-cv {
  pointer-events: none;
  z-index: 1;
}
.wb-stave .wb-draw {
  z-index: 3;
  touch-action: none;
}
.letter-btn {
  width: 100%;
  min-height: 88px;
  border-radius: 22px;
  border: 3px solid #fff;
  background: #fff;
  font: inherit;
  font-size: 2.4rem;
  cursor: pointer;
  box-shadow: 0 8px 18px rgba(55,71,79,.1);
}
.letter-btn.good { background: #c8e6c9; border-color: #43a047; color: #1b5e20; }
.letter-btn.bad { background: #ffcdd2; border-color: #e53935; }
.wb-score { text-align: center; font-size: 1.25rem; font-weight: 400; margin-top: 10px; }

@page {
  size: A4 portrait;
  margin: 0;
}

@media screen {
  .print-only-note { display: none; }
}

@media print {
  html, body {
    background: #fff !important;
    margin: 0 !important;
    padding: 0 !important;
  }
  .no-print, .workshop, .topbar, .preview-label { display: none !important; }
  .print-root { padding: 0; }
  .pack { display: none !important; }
  body[data-pack="book"] .pack-book,
  body[data-pack="games"] .pack-games,
  body[data-pack="cards"] .pack-cards {
    display: block !important;
  }
  .sheet-frame {
    width: auto;
    height: auto !important;
    margin: 0;
    overflow: visible;
  }
  .sheet {
    transform: none !important;
    box-shadow: none;
    border-radius: 0;
    width: 210mm;
    height: 297mm;
    page-break-after: always;
    page-break-inside: avoid;
    overflow: hidden;
  }
  .sheet:last-child { page-break-after: auto; }
  * {
    -webkit-print-color-adjust: exact !important;
    print-color-adjust: exact !important;
  }
}

@media (max-width: 720px) {
  .tab { font-size: 1rem; padding: 8px 12px; }
  .six-grid, .circle-grid, .grid-4 { grid-template-columns: 1fr 1fr; }
}