.ftlc-writing-engine {
  --bg: #f7f4ef;
  --card: #ffffff;
  --ink: #1f2937;
  --muted: #6b7280;
  --line: #eadfce;
  --shadow: 0 16px 40px rgba(0,0,0,.08);
  --radius: 24px;

  --primary: #e96f3f;
  --primary-soft: #fff1ea;
  --primary-line: #ffd4c2;

  --accent: #6d5dfc;
  --accent-soft: #f1efff;
  --accent-line: #ddd7ff;

  --green: #2f9e74;
  --green-soft: #ecfbf5;
  --green-line: #c8f0df;

  --gold: #a87400;
  --gold-soft: #fff8df;
  --gold-line: #f4e3a1;

  --red: #c8563d;
  --red-soft: #fff0ec;
  --red-line: #ffd3c8;

  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  margin: 28px 0;
}

.ftlc-writing-engine *,
.ftlc-writing-engine *::before,
.ftlc-writing-engine *::after {
  box-sizing: border-box;
}

.ftlc-writing-engine button {
  font: inherit;
}

.ftlc-writing-engine .wrap {
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  padding: 0 2px;
}

/* =========================
   Hero
========================= */

.ftlc-writing-engine .hero {
  background: linear-gradient(135deg, #fff7f1 0%, #f7f1ff 100%);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
  padding: 26px 24px 22px;
  margin-bottom: 20px;
}

.ftlc-writing-engine .eyebrow {
  display: inline-block;
  padding: 7px 14px;
  border-radius: 999px;
  background: var(--gold-soft);
  color: var(--gold);
  border: 1px solid var(--gold-line);
  font-size: 13px;
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: .03em;
}

.ftlc-writing-engine .title {
  margin: 0 0 10px;
  font-size: clamp(26px, 4vw, 38px);
  line-height: 1.18;
  font-weight: 850;
  color: var(--ink);
}

.ftlc-writing-engine .lead {
  margin: 0;
  color: var(--muted);
  font-size: 15.5px;
  line-height: 1.75;
}

.ftlc-writing-engine .lead span {
  color: #475569;
  font-weight: 700;
}

.ftlc-writing-engine .smallLead {
  margin-top: 14px;
  font-size: 14.5px;
}

.ftlc-writing-engine .topicBox {
  margin: 16px 0 0;
  padding: 14px 16px;
  border-radius: 18px;
  background: #ffffff;
  border: 1px solid var(--line);
}

.ftlc-writing-engine .topicZh {
  font-size: 17px;
  font-weight: 850;
  color: var(--ink);
  line-height: 1.5;
}

.ftlc-writing-engine .topicEn {
  margin-top: 4px;
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.5;
}

/* =========================
   Progress
========================= */

.ftlc-writing-engine .topbar {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  justify-content: space-between;
  margin: 18px 0 16px;
}

.ftlc-writing-engine .progressBox {
  flex: 1 1 320px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 14px 16px;
  box-shadow: var(--shadow);
  min-width: 0;
}

.ftlc-writing-engine .progressLabel {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  font-weight: 800;
  margin-bottom: 10px;
}

.ftlc-writing-engine .progressTrack {
  width: 100%;
  height: 12px;
  background: #f1ece4;
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid #eadfce;
}

.ftlc-writing-engine .progressFill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), #ffb07f);
  border-radius: 999px;
  transition: width .28s ease;
}

.ftlc-writing-engine .counter {
  flex: 0 0 auto;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--accent-line);
  border-radius: 18px;
  padding: 14px 16px;
  font-weight: 900;
  min-width: 130px;
  text-align: center;
  box-shadow: var(--shadow);
}

/* =========================
   Main Card
========================= */

.ftlc-writing-engine .card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 30px;
  box-shadow: var(--shadow);
  padding: 24px;
}

.ftlc-writing-engine .sectionTag {
  display: inline-block;
  padding: 8px 15px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--accent-line);
  font-size: 14px;
  font-weight: 850;
  margin-bottom: 14px;
}

.ftlc-writing-engine .patternIntro {
  margin-bottom: 18px;
}

.ftlc-writing-engine .patternIntroInner {
  border: 1px solid var(--line);
  background: #fffdf9;
  border-radius: 20px;
  padding: 16px 18px;
}

.ftlc-writing-engine .patternCore {
  display: inline-block;
  background: var(--primary-soft);
  color: var(--primary);
  border: 1px solid var(--primary-line);
  border-radius: 999px;
  padding: 7px 13px;
  font-size: 14px;
  font-weight: 850;
  margin-bottom: 10px;
}

.ftlc-writing-engine .patternText {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  color: #475569;
  font-size: 14px;
  line-height: 1.5;
}

.ftlc-writing-engine .patternText strong {
  color: var(--ink);
  font-size: 16px;
}

.ftlc-writing-engine .patternText span {
  color: var(--muted);
  font-weight: 700;
}

.ftlc-writing-engine .sentencesWrapper {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 24px;
}

/* =========================
   Classic Writing Block
========================= */

.ftlc-writing-engine .writingClassicBlock {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 24px;
}

.ftlc-writing-engine .panel {
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 24px;
  background: #fffdf9;
  min-width: 0;
  width: 100%;
  margin-bottom: 16px;
}

.ftlc-writing-engine .learningPointsPanel,
.ftlc-writing-engine .charactersPanel {
  margin-bottom: 18px;
}

.ftlc-writing-engine .panelTitle {
  margin: 0 0 16px;
  font-size: 17px;
  font-weight: 900;
  color: var(--ink);
  border-bottom: 2px solid var(--line);
  padding-bottom: 10px;
}

.ftlc-writing-engine .panelText {
  color: #475569;
  line-height: 1.6;
  font-size: 14.5px;
  margin: 0 0 16px;
}

.ftlc-writing-engine .panelText em {
  color: var(--muted);
  font-style: normal;
  font-size: 13.5px;
}

/* =========================
   Learning Points Categories
   New structure:
   key_vocabulary / key_patterns / key_modifiers
========================= */

.ftlc-writing-engine .learningCategory {
  border-radius: 18px;
  padding: 16px;
  margin-bottom: 16px;
  border: 1px solid var(--line);
  background: #ffffff;
}

.ftlc-writing-engine .learningCategory:last-child {
  margin-bottom: 0;
}

.ftlc-writing-engine .learningCategory.is-vocabulary {
  background: var(--accent-soft);
  border-color: var(--accent-line);
}

.ftlc-writing-engine .learningCategory.is-pattern {
  background: var(--primary-soft);
  border-color: var(--primary-line);
}

.ftlc-writing-engine .learningCategory.is-modifier {
  background: var(--green-soft);
  border-color: var(--green-line);
}

.ftlc-writing-engine .learningCategoryHeader {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.ftlc-writing-engine .learningCategoryTitle {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 15px;
  font-weight: 900;
  color: var(--ink);
  line-height: 1.35;
}

.ftlc-writing-engine .learningCategoryTitle em {
  font-style: normal;
  font-size: 12.5px;
  font-weight: 800;
  color: var(--muted);
}

.ftlc-writing-engine .learningDot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  display: inline-block;
  background: var(--accent);
}

.ftlc-writing-engine .learningCategory.is-pattern .learningDot {
  background: var(--primary);
}

.ftlc-writing-engine .learningCategory.is-vocabulary .learningDot {
  background: var(--accent);
}

.ftlc-writing-engine .learningCategory.is-modifier .learningDot {
  background: var(--green);
}

/* =========================
   Chips
========================= */

.ftlc-writing-engine .chips {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.ftlc-writing-engine .chip {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #fff;
  font-size: 14px;
  max-width: 100%;
  box-shadow: 0 2px 8px rgba(0,0,0,0.02);
}

.ftlc-writing-engine .chip.is-vocabulary {
  border-color: var(--accent-line);
  background: #ffffff;
}

.ftlc-writing-engine .chip.is-pattern {
  border-color: var(--primary-line);
  background: #ffffff;
}

.ftlc-writing-engine .chip.is-modifier {
  border-color: var(--green-line);
  background: #ffffff;
}

.ftlc-writing-engine .chipCn {
  font-size: 18px;
  font-weight: 900;
  line-height: 1.1;
  flex: 0 0 auto;
  color: var(--ink);
}

.ftlc-writing-engine .chip.is-vocabulary .chipCn {
  color: var(--accent);
}

.ftlc-writing-engine .chip.is-pattern .chipCn {
  color: var(--primary);
}

.ftlc-writing-engine .chip.is-modifier .chipCn {
  color: var(--green);
}

.ftlc-writing-engine .chipMeta {
  display: flex;
  flex-direction: column;
  gap: 2px;
  line-height: 1.2;
  min-width: 0;
}

.ftlc-writing-engine .chipPy {
  font-size: 12px;
  color: #64748b;
  font-weight: 800;
}

.ftlc-writing-engine .chipEn {
  font-size: 12px;
  color: var(--muted);
  font-weight: 650;
}

.ftlc-writing-engine .chipParts {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  width: 100%;
  margin-top: 6px;
}

.ftlc-writing-engine .chipPart {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 8px;
  border-radius: 999px;
  background: var(--primary-soft);
  border: 1px solid var(--primary-line);
  color: var(--primary);
  font-size: 12px;
  font-weight: 850;
}

.ftlc-writing-engine .chipPartText {
  font-weight: 900;
}

.ftlc-writing-engine .chipPartPy {
  color: #9a4f2b;
  font-size: 11px;
  font-weight: 750;
}

/* =========================
   Writing Practice Categories
========================= */

.ftlc-writing-engine .writeCategory {
  border-radius: 18px;
  padding: 16px;
  margin-top: 16px;
  border: 1px solid var(--line);
  background: #ffffff;
}

.ftlc-writing-engine .writeCategory.is-pattern {
  background: var(--primary-soft);
  border-color: var(--primary-line);
}

.ftlc-writing-engine .writeCategory.is-vocabulary {
  background: var(--accent-soft);
  border-color: var(--accent-line);
}

.ftlc-writing-engine .writeCategory.is-modifier {
  background: var(--green-soft);
  border-color: var(--green-line);
}

.ftlc-writing-engine .writeCategoryHeader {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
  font-size: 15px;
  font-weight: 900;
  color: var(--ink);
}

.ftlc-writing-engine .writeCategoryHeader em {
  color: var(--muted);
  font-size: 12.5px;
  font-style: normal;
  font-weight: 800;
}

/* =========================
   Pattern Observation
========================= */

.ftlc-writing-engine .patternObserveList {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ftlc-writing-engine .patternObserveCard {
  background: #ffffff;
  border: 1px solid var(--primary-line);
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 4px 12px rgba(233, 111, 63, .05);
}

.ftlc-writing-engine .patternObserveText {
  font-size: 24px;
  line-height: 1.35;
  font-weight: 950;
  color: var(--primary);
  margin-bottom: 6px;
}

.ftlc-writing-engine .patternObservePy {
  font-size: 13.5px;
  color: #9a4f2b;
  font-weight: 800;
  margin-bottom: 4px;
}

.ftlc-writing-engine .patternObserveEn {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
}

.ftlc-writing-engine .patternObserveParts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.ftlc-writing-engine .patternObservePart {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 10px;
  border-radius: 999px;
  background: var(--primary-soft);
  border: 1px solid var(--primary-line);
  color: var(--primary);
}

.ftlc-writing-engine .patternObservePart strong {
  font-size: 16px;
  font-weight: 950;
}

.ftlc-writing-engine .patternObservePart em {
  font-size: 12px;
  font-style: normal;
  font-weight: 800;
  color: #9a4f2b;
}

/* =========================
   Characters to Write
========================= */

.ftlc-writing-engine .writeList {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.ftlc-writing-engine .writeWord {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 12px 18px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.02);
  min-width: 128px;
}

.ftlc-writing-engine .writeWord.is-vocabulary {
  border-color: var(--accent-line);
  box-shadow: 0 5px 14px rgba(109, 93, 252, .06);
}

.ftlc-writing-engine .writeWord.is-modifier {
  border-color: var(--green-line);
  box-shadow: 0 5px 14px rgba(47, 158, 116, .06);
}

.ftlc-writing-engine .writeLabel {
  font-size: 11px;
  font-weight: 900;
  line-height: 1;
  padding: 5px 8px;
  border-radius: 999px;
  margin-bottom: 8px;
}

.ftlc-writing-engine .writeWord.is-vocabulary .writeLabel {
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--accent-line);
}

.ftlc-writing-engine .writeWord.is-modifier .writeLabel {
  background: var(--green-soft);
  color: var(--green);
  border: 1px solid var(--green-line);
}

.ftlc-writing-engine .writeChars {
  display: flex;
  gap: 6px;
  margin: 8px 0;
}

.ftlc-writing-engine .charBox {
  width: 52px;
  height: 52px;
  border: 1px dashed #e5d8c3;
  background: #fdfaf4;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  font-family: "Kaiti SC", "STKaiti", "KaiTi", serif;
  color: var(--ink);
  position: relative;
}

.ftlc-writing-engine .writeWord.is-vocabulary .charBox {
  border-color: var(--accent-line);
  background: #fbfaff;
}

.ftlc-writing-engine .writeWord.is-modifier .charBox {
  border-color: var(--green-line);
  background: #f7fffb;
}

.ftlc-writing-engine .charBox::before,
.ftlc-writing-engine .charBox::after {
  content: "";
  position: absolute;
  background: #f0e6d3;
  z-index: 0;
}

.ftlc-writing-engine .writeWord.is-vocabulary .charBox::before,
.ftlc-writing-engine .writeWord.is-vocabulary .charBox::after {
  background: #ddd7ff;
}

.ftlc-writing-engine .writeWord.is-modifier .charBox::before,
.ftlc-writing-engine .writeWord.is-modifier .charBox::after {
  background: #c8f0df;
}

.ftlc-writing-engine .charBox::before {
  width: 100%;
  height: 1px;
  top: 50%;
  left: 0;
}

.ftlc-writing-engine .charBox::after {
  width: 1px;
  height: 100%;
  top: 0;
  left: 50%;
}

.ftlc-writing-engine .charBox span {
  position: relative;
  z-index: 1;
  line-height: 1;
}

.ftlc-writing-engine .writePy {
  font-size: 13.5px;
  color: #64748b;
  font-weight: 800;
  text-align: center;
}

.ftlc-writing-engine .writeWordText {
  font-size: 15px;
  color: var(--ink);
  font-weight: 850;
  line-height: 1.35;
  text-align: center;
  margin-bottom: 2px;
}

.ftlc-writing-engine .writeWord.is-vocabulary .writeWordText {
  color: var(--accent);
}

.ftlc-writing-engine .writeWord.is-modifier .writeWordText {
  color: var(--green);
}

.ftlc-writing-engine .writeEn {
  font-size: 12.5px;
  color: var(--muted);
  text-align: center;
  line-height: 1.35;
}

/* =========================
   Old Compatibility
========================= */

.ftlc-writing-engine .vocabCategory {
  margin-bottom: 20px;
}

.ftlc-writing-engine .vocabCategory:last-child {
  margin-bottom: 0;
}

.ftlc-writing-engine .vocabTitle {
  font-size: 14px;
  font-weight: 800;
  color: #64748b;
  margin-bottom: 10px;
}

.ftlc-writing-engine .vocabPanel {
  margin-bottom: 18px;
}

/* =========================
   Writing Tool / PDF CTA
========================= */

.ftlc-writing-engine .ctaPanel {
  background: linear-gradient(135deg, var(--accent-soft) 0%, #ffffff 100%);
  border: 2px solid var(--accent-line);
  border-radius: 22px;
  text-align: center;
  padding: 30px 24px;
  margin-top: 10px;
}

.ftlc-writing-engine .ctaTitle {
  font-size: 20px;
  font-weight: 900;
  color: var(--accent);
  margin: 0 0 10px 0;
  line-height: 1.4;
}

.ftlc-writing-engine .ctaText {
  font-size: 15px;
  color: #475569;
  margin: 0 0 20px 0;
  line-height: 1.7;
}

.ftlc-writing-engine .ctaText em {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 13.5px;
  font-style: normal;
}

.ftlc-writing-engine .ctaBtn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--accent);
  color: #fff !important;
  padding: 14px 28px;
  border-radius: 16px;
  font-weight: 900;
  font-size: 16px;
  text-decoration: none !important;
  box-shadow: 0 8px 20px rgba(109, 93, 252, 0.25);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.ftlc-writing-engine .ctaBtn:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 24px rgba(109, 93, 252, 0.35);
}

.ftlc-writing-engine .ctaBtn span {
  font-size: 13px;
  font-weight: 800;
}

.ftlc-writing-engine .ctaBtn.is-disabled {
  opacity: 0.65;
  cursor: not-allowed;
  pointer-events: none;
}

/* =========================
   Navigation
========================= */

.ftlc-writing-engine .controls {
  display: flex;
  gap: 12px;
  justify-content: space-between;
  align-items: center;
  margin-top: 24px;
  flex-wrap: wrap;
}

.ftlc-writing-engine .btnGroup {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.ftlc-writing-engine .navBtn {
  border: none;
  cursor: pointer;
  font-weight: 900;
  border-radius: 16px;
  padding: 14px 22px;
  transition: transform .18s ease, box-shadow .18s ease, opacity .18s ease;
}

.ftlc-writing-engine .navBtn:hover {
  transform: translateY(-2px);
}

.ftlc-writing-engine .navBtn:active {
  transform: translateY(0);
}

.ftlc-writing-engine .btnPrev {
  background: #fff;
  color: #374151;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.ftlc-writing-engine .btnNext {
  background: linear-gradient(135deg, var(--primary), #ff9d6d);
  color: #fff;
  box-shadow: 0 8px 20px rgba(233, 111, 63, .25);
}

.ftlc-writing-engine .btnRestart {
  background: linear-gradient(135deg, var(--accent), #8a7cff);
  color: #fff;
  box-shadow: 0 8px 20px rgba(109, 93, 252, .25);
}

.ftlc-writing-engine .btnDisabled {
  opacity: .45;
  cursor: not-allowed;
  transform: none !important;
}

.ftlc-writing-engine .footerNote {
  margin-top: 18px;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.7;
  text-align: center;
}

/* =========================
   Error
========================= */

.ftlc-writing-error {
  max-width: 980px;
  margin: 24px auto;
  padding: 18px 20px;
  border-radius: 18px;
  background: #fff0ec;
  border: 1px solid #ffd3c8;
  color: #c8563d;
  font-weight: 700;
  line-height: 1.6;
}

/* =========================
   Mobile
========================= */

@media (max-width: 640px) {
  .ftlc-writing-engine .hero,
  .ftlc-writing-engine .card,
  .ftlc-writing-engine .writingClassicBlock,
  .ftlc-writing-engine .panel,
  .ftlc-writing-engine .ctaPanel {
    border-radius: 22px;
  }

  .ftlc-writing-engine .hero,
  .ftlc-writing-engine .card,
  .ftlc-writing-engine .writingClassicBlock,
  .ftlc-writing-engine .panel {
    padding: 18px;
  }

  .ftlc-writing-engine .learningCategory,
  .ftlc-writing-engine .writeCategory {
    padding: 14px;
  }

  .ftlc-writing-engine .learningCategoryTitle {
    align-items: flex-start;
  }

  .ftlc-writing-engine .chip {
    width: 100%;
    align-items: flex-start;
  }

  .ftlc-writing-engine .chipCn {
    min-width: 72px;
  }

  .ftlc-writing-engine .chipParts {
    margin-left: 0;
  }

  .ftlc-writing-engine .writeList {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .ftlc-writing-engine .writeWord {
    padding: 12px 10px;
    min-width: 0;
  }

  .ftlc-writing-engine .charBox {
    width: 46px;
    height: 46px;
    font-size: 28px;
  }

  .ftlc-writing-engine .patternObserveText {
    font-size: 21px;
  }

  .ftlc-writing-engine .patternObservePart {
    width: 100%;
    justify-content: space-between;
  }

  .ftlc-writing-engine .ctaBtn {
    width: 100%;
    flex-direction: column;
  }

  .ftlc-writing-engine .btnGroup,
  .ftlc-writing-engine .navBtn,
  .ftlc-writing-engine .btnRestart {
    width: 100%;
  }

  .ftlc-writing-engine .btnGroup {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
}