.ftlc-shadowing-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;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

.ftlc-shadowing-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);
}

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

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

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

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

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

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

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

.ftlc-shadowing-engine .sentenceBlock {
  background: #ffffff;
  border: 2px solid var(--accent-line);
  border-radius: 24px;
  padding: 24px;
  position: relative;
  box-shadow: 0 10px 28px rgba(109, 93, 252, 0.06);
}

.ftlc-shadowing-engine .sentenceBadgeRow {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.ftlc-shadowing-engine .sentenceBadge {
  display: inline-flex;
  align-items: center;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.ftlc-shadowing-engine .patternChip {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  border: 1px solid var(--primary-line);
  font-size: 13px;
  font-weight: 850;
}

.ftlc-shadowing-engine .cnRow {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 8px;
}

.ftlc-shadowing-engine .cnText {
  font-size: clamp(26px, 4vw, 44px);
  line-height: 1.45;
  font-weight: 900;
  color: var(--ink);
  word-break: break-word;
  letter-spacing: .01em;
}

.ftlc-shadowing-engine .audioBtn {
  flex: 0 0 auto;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--primary-soft) !important;
  border: 1px solid var(--primary-line) !important;
  color: var(--primary) !important;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 19px;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
  margin-top: 4px;
}

.ftlc-shadowing-engine .audioBtn:hover {
  transform: scale(1.08);
  background: var(--primary) !important;
  color: #fff !important;
}

.ftlc-shadowing-engine .pyText {
  font-size: clamp(17px, 2.2vw, 22px);
  color: #475569;
  line-height: 1.65;
  margin-bottom: 6px;
}

.ftlc-shadowing-engine .enText {
  font-size: 15.5px;
  color: var(--muted);
  line-height: 1.65;
  margin-bottom: 22px;
}

/* =========================================================
   Highlight system
   ---------------------------------------------------------
   New data logic:
   highlight_parts / type: pattern     = 重点句型
   keywords / type: vocabulary         = 重点词汇
   keywords / type: modifier           = 重点修饰词

   Color rules:
   重点句型   = orange
   重点词汇   = purple
   重点修饰词 = green
   ========================================================= */

.ftlc-shadowing-engine [class^="hl-"],
.ftlc-shadowing-engine [class*=" hl-"] {
  display: inline-block;
  padding: 2px 7px;
  border-radius: 8px;
  margin: 0 2px;
  line-height: 1.2;
  font-weight: 900;
  vertical-align: baseline;
}

/* Pinyin highlight should be smaller and lighter than Chinese highlight */
.ftlc-shadowing-engine .pyText [class^="hl-"],
.ftlc-shadowing-engine .pyText [class*=" hl-"] {
  padding: 1px 5px;
  border-radius: 6px;
  margin: 0 1px;
  line-height: 1.25;
  font-weight: 800;
}

/* 重点句型 | Key Patterns */
.ftlc-shadowing-engine .hl-grammar,
.ftlc-shadowing-engine .hl-pattern {
  background: var(--primary-soft);
  color: var(--primary);
  border: 1px solid var(--primary-line);
  box-shadow: 0 2px 0 rgba(233, 111, 63, .08);
}

/* 重点词汇 | Key Vocabulary */
.ftlc-shadowing-engine .hl-vocab,
.ftlc-shadowing-engine .hl-keyword-vocabulary,
.ftlc-shadowing-engine .hl-keyword-vocab,
.ftlc-shadowing-engine .hl-keyword-phrase {
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--accent-line);
  box-shadow: 0 2px 0 rgba(109, 93, 252, .08);
}

/* 重点修饰词 | Key Modifiers */
.ftlc-shadowing-engine .hl-modifier,
.ftlc-shadowing-engine .hl-keyword-modifier {
  background: var(--green-soft);
  color: var(--green);
  border: 1px solid var(--green-line);
  box-shadow: 0 2px 0 rgba(47, 158, 116, .08);
}

/* Keep old general keyword class safe without overriding specific category colors */
.ftlc-shadowing-engine .hl-keyword {
  font-weight: 900;
}

/* Make highlights readable inside large Chinese sentence */
.ftlc-shadowing-engine .cnText .hl-grammar,
.ftlc-shadowing-engine .cnText .hl-pattern,
.ftlc-shadowing-engine .cnText .hl-vocab,
.ftlc-shadowing-engine .cnText .hl-keyword,
.ftlc-shadowing-engine .cnText .hl-keyword-vocabulary,
.ftlc-shadowing-engine .cnText .hl-keyword-vocab,
.ftlc-shadowing-engine .cnText .hl-keyword-phrase,
.ftlc-shadowing-engine .cnText .hl-modifier,
.ftlc-shadowing-engine .cnText .hl-keyword-modifier {
  font-weight: 950;
  vertical-align: baseline;
}

.ftlc-shadowing-engine .shadowBox {
  border: 1px solid var(--accent-line);
  border-radius: 22px;
  background: var(--accent-soft);
  padding: 20px;
  margin-top: 18px;
}

.ftlc-shadowing-engine .shadowHeader {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.ftlc-shadowing-engine .shadowTitle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 900;
  color: var(--ink);
}

.ftlc-shadowing-engine .shadowTitleIcon {
  font-size: 18px;
}

.ftlc-shadowing-engine .shadowSpeedGroup {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.ftlc-shadowing-engine .shadowSpeedLabel {
  font-size: 12px;
  font-weight: 900;
  color: #64748b;
  letter-spacing: .08em;
}

.ftlc-shadowing-engine .shadowSpeedBtns {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.ftlc-shadowing-engine .shadowSpeedBtn {
  border: 1px solid var(--accent-line) !important;
  background: #fff !important;
  color: #374151 !important;
  border-radius: 999px !important;
  padding: 9px 18px !important;
  cursor: pointer !important;
  font-weight: 800 !important;
  line-height: 1.2 !important;
  transition: transform .18s ease, background .18s ease, color .18s ease, box-shadow .18s ease;
}

.ftlc-shadowing-engine .shadowSpeedBtn:hover {
  transform: translateY(-1px);
}

.ftlc-shadowing-engine .shadowSpeedBtn.is-active {
  background: #ffffff !important;
  color: var(--accent) !important;
  border-color: var(--accent-line) !important;
  box-shadow: 0 8px 18px rgba(109, 93, 252, .12);
}

.ftlc-shadowing-engine .shadowSubtext {
  color: #475569;
  line-height: 1.6;
  font-size: 14.5px;
  font-weight: 750;
  margin-bottom: 18px;
}

.ftlc-shadowing-engine .shadowSubtext.is-success {
  color: var(--green);
}

.ftlc-shadowing-engine .shadowSubtext.is-error {
  color: var(--red);
}

.ftlc-shadowing-engine .shadowRecorder {
  display: none;
  background: var(--red-soft);
  border: 1px solid var(--red-line);
  border-radius: 18px;
  padding: 16px;
  margin-bottom: 18px;
}

.ftlc-shadowing-engine .shadowRecorder.is-active {
  display: block;
}

.ftlc-shadowing-engine .shadowRecorderTop {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
  color: #b91c1c;
  font-weight: 900;
}

.ftlc-shadowing-engine .shadowMicBadge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.ftlc-shadowing-engine .shadowCountdown {
  font-weight: 900;
}

.ftlc-shadowing-engine .shadowWave {
  display: flex;
  align-items: end;
  gap: 8px;
  height: 34px;
}

.ftlc-shadowing-engine .shadowWaveBar {
  width: 8px;
  height: 14px;
  border-radius: 999px;
  background: #f28b82;
  animation: ftlcShadowWave 0.9s ease-in-out infinite;
}

.ftlc-shadowing-engine .shadowWaveBar:nth-child(2) { animation-delay: .1s; }
.ftlc-shadowing-engine .shadowWaveBar:nth-child(3) { animation-delay: .2s; }
.ftlc-shadowing-engine .shadowWaveBar:nth-child(4) { animation-delay: .3s; }
.ftlc-shadowing-engine .shadowWaveBar:nth-child(5) { animation-delay: .4s; }

@keyframes ftlcShadowWave {
  0%, 100% { height: 12px; opacity: .65; }
  50% { height: 32px; opacity: 1; }
}

.ftlc-shadowing-engine .shadowPrimaryRow {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.ftlc-shadowing-engine .shadowPrimaryRow.is-hidden {
  display: none;
}

.ftlc-shadowing-engine .shadowStartBtn {
  border: none !important;
  cursor: pointer !important;
  background: linear-gradient(135deg, var(--accent), #8a7cff) !important;
  color: #ffffff !important;
  border-radius: 999px !important;
  padding: 14px 28px !important;
  min-width: 220px;
  font-weight: 900 !important;
  font-size: 16px !important;
  box-shadow: 0 8px 20px rgba(109, 93, 252, .25);
  transition: transform .18s ease, box-shadow .18s ease, opacity .18s ease;
}

.ftlc-shadowing-engine .shadowStartBtn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(109, 93, 252, .34);
}

.ftlc-shadowing-engine .shadowStartBtn:disabled {
  opacity: .55;
  cursor: not-allowed !important;
}

.ftlc-shadowing-engine .shadowActionRow {
  display: none;
  flex-wrap: wrap;
  gap: 10px;
}

.ftlc-shadowing-engine .shadowActionRow.is-visible {
  display: flex;
}

.ftlc-shadowing-engine .shadowMiniBtn {
  border-radius: 999px !important;
  padding: 11px 17px !important;
  font-weight: 850 !important;
  cursor: pointer !important;
  line-height: 1.2 !important;
  transition: transform .18s ease, box-shadow .18s ease, opacity .18s ease;
}

.ftlc-shadowing-engine .shadowMiniBtn:hover:not(:disabled) {
  transform: translateY(-1px);
}

.ftlc-shadowing-engine .shadowMiniBtn:disabled {
  opacity: .45;
  cursor: not-allowed !important;
}

.ftlc-shadowing-engine .shadowActionPrimary {
  background: var(--green) !important;
  color: #fff !important;
  border: 1px solid var(--green) !important;
  box-shadow: 0 8px 18px rgba(47, 158, 116, .18);
}

.ftlc-shadowing-engine .shadowActionSecondary {
  background: #fff !important;
  color: var(--accent) !important;
  border: 1px solid var(--accent-line) !important;
}

.ftlc-shadowing-engine .shadowTryAgainBtn {
  background: #fff !important;
  color: var(--primary) !important;
  border: 1px solid var(--primary-line) !important;
}

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

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

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

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

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

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

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

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

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

.ftlc-shadowing-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;
}

@media (max-width: 640px) {
  .ftlc-shadowing-engine .hero,
  .ftlc-shadowing-engine .card,
  .ftlc-shadowing-engine .sentenceBlock {
    border-radius: 22px;
  }

  .ftlc-shadowing-engine .hero,
  .ftlc-shadowing-engine .card,
  .ftlc-shadowing-engine .sentenceBlock {
    padding: 18px;
  }

  .ftlc-shadowing-engine .cnRow {
    flex-direction: column;
  }

  .ftlc-shadowing-engine .audioBtn {
    width: 46px;
    height: 46px;
  }

  .ftlc-shadowing-engine .shadowHeader {
    align-items: flex-start;
  }

  .ftlc-shadowing-engine .shadowSpeedGroup {
    width: 100%;
    justify-content: space-between;
  }

  .ftlc-shadowing-engine .shadowSpeedBtns {
    flex: 1;
    justify-content: flex-end;
  }

  .ftlc-shadowing-engine .shadowStartBtn {
    width: 100%;
    min-width: 0;
  }

  .ftlc-shadowing-engine .shadowActionRow {
    display: none;
    grid-template-columns: 1fr;
  }

  .ftlc-shadowing-engine .shadowActionRow.is-visible {
    display: grid;
    width: 100%;
  }

  .ftlc-shadowing-engine .shadowMiniBtn {
    width: 100%;
  }

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

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