:root {
  --bg:#fffaf2; --panel:#ffffff; --ink:#2b2b2b; --muted:#686868;
  --accent:#7a4cf6; --accent2:#ffb84d; --soft:#f1eaff; --good:#1b8f5a; --bad:#c0392b;
  --line:#eadfce; --card:#fffdf8;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang TC","Noto Sans CJK TC","Microsoft JhengHei",Arial,sans-serif;background:var(--bg);color:var(--ink);font-size:18px;line-height:1.65}
header{position:sticky;top:0;z-index:10;background:linear-gradient(90deg,#6f4cf5,#9a6cff);color:#fff;padding:14px 20px;display:flex;align-items:center;gap:16px;box-shadow:0 4px 18px rgba(0,0,0,.16)}
header h1{font-size:22px;margin:0;line-height:1.25}
header .badge{background:rgba(255,255,255,.22);padding:4px 10px;border-radius:999px;font-size:14px}
.layout{display:grid;grid-template-columns:330px 1fr;min-height:calc(100vh - 72px)}
aside{background:#fff; border-right:1px solid var(--line); padding:16px; overflow-y:auto; max-height:calc(100vh - 72px); position:sticky;top:72px}
main{padding:22px 26px 80px;max-width:1180px;width:100%}
.search{width:100%;font-size:16px;padding:10px 12px;border:1px solid var(--line);border-radius:12px;margin-bottom:12px}
.weekTitle{font-weight:800;margin:18px 0 8px;color:#4930b4}
.lessonBtn{display:block;width:100%;text-align:left;border:1px solid var(--line);background:#fff;color:#2d245e;border-radius:14px;padding:10px 12px;margin:8px 0;cursor:pointer;font-size:16px;line-height:1.35}
.lessonBtn:hover{background:var(--soft)}
.lessonBtn.active{background:var(--accent);color:#fff;border-color:var(--accent)}
.lessonBtn small{display:block;opacity:.78;margin-top:3px}
.tools{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 18px}
button,.pill{border:0;border-radius:999px;padding:9px 14px;background:var(--accent);color:#fff;font-weight:700;cursor:pointer;font-size:15px}
button.secondary{background:#fff;color:var(--accent);border:1px solid #cabdff}
button.warn{background:var(--accent2);color:#2b2b2b}
button.ghost{background:#f5f1ff;color:#442aa6}
.card{background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:20px;margin:16px 0;box-shadow:0 6px 20px rgba(90,66,30,.06)}
.hero{background:linear-gradient(135deg,#fff,#f3edff);border:1px solid #ddd2ff}
h2{font-size:34px;margin:0 0 4px;line-height:1.25}
h3{font-size:24px;margin:4px 0 10px;color:#402a96}
h4{font-size:20px;margin:18px 0 8px;color:#5b3ec8}
.muted{color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:14px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.tag{display:inline-block;background:#f2ecff;color:#5236b9;border-radius:999px;padding:3px 10px;margin:3px;font-size:15px}
.obj li{margin-bottom:6px}
.tabs{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0;position:sticky;top:68px;z-index:8;background:var(--bg);padding:10px 0}
.tab{background:#fff;color:#3f2ca3;border:1px solid #d6cbff}
.tab.active{background:var(--accent);color:#fff}
.section{display:none}
.section.active{display:block}
.storyBox{font-size:24px;background:#fffdf6;border:2px dashed #f0cb72;border-radius:20px;padding:20px}
.bigRead{font-size:30px;line-height:1.9;letter-spacing:.02em}
.readLine{padding:8px 12px;border-bottom:1px dashed #e5d6ba;cursor:pointer;border-radius:10px}
.readLine:hover{background:#fff3d8}
.flashGrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:12px}
.flashcard{min-height:110px;display:flex;align-items:center;justify-content:center;text-align:center;background:#fff;border:2px solid #e5dbff;border-radius:18px;font-size:30px;font-weight:900;cursor:pointer;transition:.2s;box-shadow:0 4px 10px rgba(0,0,0,.05)}
.flashcard.flip{background:#fff0cf;transform:scale(1.02)}
.flashcard small{display:block;font-size:13px;font-weight:600;color:#6c5a2b;margin-top:6px}
.quizItem{border:1px solid var(--line);border-radius:18px;padding:16px;margin:12px 0;background:#fff}
.choice{display:block;background:#f8f6ff;color:#2d245e;border:1px solid #ded7ff;border-radius:14px;margin:8px 0;padding:10px 14px;text-align:left;width:100%}
.choice.correct{background:#e8f8ef;border-color:#98d9b5;color:#12633d}
.choice.wrong{background:#ffecec;border-color:#ffb2b2;color:#8c1d14}
.feedback{font-weight:700;margin-top:8px}
.categoryWrap{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px}
.bucket{background:#fff;border:2px dashed #d9ccff;border-radius:18px;padding:12px;min-height:150px}
.bucket h4{margin-top:0}
.wordChip{display:inline-block;background:#fff7df;border:1px solid #f0cd75;border-radius:999px;padding:7px 12px;margin:5px;cursor:pointer;font-weight:700}
.wordChip.selected{background:#7a4cf6;color:#fff}
.sentenceBoard{min-height:70px;border:2px dashed #b8a8f6;border-radius:16px;padding:12px;background:#fff;margin:10px 0;font-size:24px}
.dictBox{background:#f8fffb;border:1px solid #bde3cc;border-radius:18px;padding:16px;margin:12px 0}
.inputLine{width:100%;font-size:24px;border:1px solid #ddd;border-radius:12px;padding:10px;margin:8px 0}
.answer{display:none;background:#e8f8ef;color:#145c3e;border-radius:12px;padding:8px 12px;margin-top:8px;font-weight:800}
.answer.show{display:block}
.printSheet{background:white;border:1px solid #ccc;padding:22px;min-height:600px}
.handwriting{font-size:34px;letter-spacing:18px;line-height:2.2;border-bottom:1px solid #ddd}
.smallTable{width:100%;border-collapse:collapse;margin:10px 0}
.smallTable th,.smallTable td{border:1px solid #e2d7c5;padding:8px;text-align:left;vertical-align:top}
.smallTable th{background:#fbf2dd}
.checklist label{display:block;margin:8px 0;background:#fff;padding:8px 12px;border-radius:12px;border:1px solid #eadfce}
.kidMode body,.kid body{font-size:22px}
.kid .storyBox,.kid .bigRead{font-size:34px}
.kid .flashcard{font-size:38px;min-height:135px}
.toolTemplate{border:2px dashed #aaa;border-radius:18px;padding:16px;margin:14px 0;background:#fff}
.stars{display:flex;gap:10px;flex-wrap:wrap}
.star{width:90px;height:90px;display:flex;align-items:center;justify-content:center;background:#ffe08a;clip-path:polygon(50% 0%,61% 35%,98% 35%,68% 57%,79% 91%,50% 70%,21% 91%,32% 57%,2% 35%,39% 35%);font-size:14px;text-align:center;font-weight:900;padding:18px;color:#513b00}
.footerNote{font-size:14px;color:#666;margin-top:22px}
@media (max-width:900px){.layout{grid-template-columns:1fr}aside{position:static;max-height:none}.two{grid-template-columns:1fr}header{position:static}.tabs{position:static}}
@media print{
  header,aside,.tabs,.tools,.noPrint{display:none!important}
  body{background:#fff;font-size:16px}
  .layout{display:block}
  main{padding:0;max-width:none}
  .card{box-shadow:none;border:none;margin:0;padding:0}
  .section{display:block!important;page-break-after:always}
  .printOnly{display:block!important}
  .printSheet{border:none}
}

.instantStrokePanel{background:#fff;border:2px solid #d9ccff;border-radius:24px;padding:18px;margin:16px 0;box-shadow:0 8px 24px rgba(64,42,150,.10)}
.strokeViewerWrap{display:grid;grid-template-columns:360px 1fr;gap:18px;align-items:start}
.strokeTarget{width:330px;height:330px;border:2px solid #cfc3f6;border-radius:20px;margin:auto;background:
  linear-gradient(90deg, transparent 49.5%, #ded7ff 49.5%, #ded7ff 50.5%, transparent 50.5%),
  linear-gradient(0deg, transparent 49.5%, #ded7ff 49.5%, #ded7ff 50.5%, transparent 50.5%),
  linear-gradient(45deg, transparent 49.6%, #f0ebff 49.6%, #f0ebff 50.4%, transparent 50.4%),
  linear-gradient(-45deg, transparent 49.6%, #f0ebff 49.6%, #f0ebff 50.4%, transparent 50.4%);display:flex;align-items:center;justify-content:center}
.clickChar{font-size:72px;font-weight:900;min-height:118px;border:3px solid #e7dcff;border-radius:22px;background:#fff;cursor:pointer;color:#2d245e;box-shadow:0 6px 16px rgba(0,0,0,.06);display:flex;align-items:center;justify-content:center;flex-direction:column}
.clickChar:hover{background:#fff4d6;border-color:#ffcf63;transform:translateY(-2px)}
.clickChar small{font-size:14px;color:#6a5a2b;margin-top:6px}
.strokeStatus{font-weight:800;color:#5b3ec8;margin:8px 0}
.strokeMiniGuide{background:#f8f6ff;border-radius:16px;padding:12px;margin-top:10px}
@media(max-width:850px){.strokeViewerWrap{grid-template-columns:1fr}.strokeTarget{width:280px;height:280px}.clickChar{font-size:58px}}


.charMiniRow{display:flex;gap:6px;flex-wrap:wrap;justify-content:center;margin-top:8px}
.charMiniBtn{border:1px solid #d8cef8;background:#f8f6ff;color:#402a96;border-radius:999px;padding:4px 9px;font-size:15px;font-weight:900;cursor:pointer}
.charMiniBtn:hover{background:#ffe9a8;color:#3a2a00}
.strokeWordCard{background:#fff;border:2px solid #e7dcff;border-radius:18px;padding:12px;text-align:center}
.strokeWordCard strong{font-size:28px;color:#2d245e}
.loadingBox{background:#fff8e8;border:1px solid #e9c773;border-radius:14px;padding:10px;margin:10px 0;color:#5d4200;font-weight:700}
.strokeTarget svg{display:block;margin:auto}


.nativeStrokeSvg{width:330px;height:330px;display:block;margin:auto;background:transparent}
.nativeStrokePath{fill:#222;stroke:none;opacity:.10;transition:opacity .25s ease}
.nativeStrokePath.active{opacity:1}
.strokeNumber{font-size:36px;font-weight:900;fill:#7a4cf6;stroke:#fff;stroke-width:6px;paint-order:stroke}
.strokeControls{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px;justify-content:center}
.strokeDataMsg{background:#f7fff9;border:1px solid #b8e5c9;border-radius:14px;padding:10px;margin:10px 0;color:#135d39;font-weight:800}
.strokeDataMsg.error{background:#fff1f1;border-color:#ffb7b7;color:#8b1e16}
.strokeGrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(108px,1fr));gap:12px;margin:12px 0}
.strokeNote{background:#fff8e8;border:1px solid #e9c773;border-radius:14px;padding:12px;margin:10px 0;color:#5d4200}
.moeStrokeEmbed{margin-top:14px;padding:12px;background:#fff;border:1px solid #d8ccef;border-radius:16px}
.moeStrokeFrame{display:block;width:100%;height:560px;border:1px solid #d8ccef;border-radius:12px;background:#fff}
.practiceBox{display:grid;grid-template-columns:310px 1fr;gap:18px;align-items:start}
.gridGuide{width:280px;height:280px;border:2px solid #cfc3f6;border-radius:20px;background:
  linear-gradient(90deg, transparent 49.5%, #ded7ff 49.5%, #ded7ff 50.5%, transparent 50.5%),
  linear-gradient(0deg, transparent 49.5%, #ded7ff 49.5%, #ded7ff 50.5%, transparent 50.5%),
  linear-gradient(45deg, transparent 49.6%, #f0ebff 49.6%, #f0ebff 50.4%, transparent 50.4%),
  linear-gradient(-45deg, transparent 49.6%, #f0ebff 49.6%, #f0ebff 50.4%, transparent 50.4%);
  display:flex;align-items:center;justify-content:center;font-size:150px;font-weight:900;color:#2d245e;margin:auto}
.traceCanvas{width:100%;max-width:520px;aspect-ratio:1;border:2px solid #cfc3f6;border-radius:18px;background:#fff;touch-action:none}
.charButtonRow{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:8px}
.charButtonRow .charMiniBtn{font-size:18px}
.sourceList{font-size:14px;line-height:1.5;margin-top:8px;color:#6b4b00}
@media(max-width:850px){.practiceBox{grid-template-columns:1fr}.gridGuide{width:250px;height:250px;font-size:130px}}
@media(max-width:850px){.moeStrokeFrame{height:620px}}



:root {
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
}

html {
  min-height: 100%;
  -webkit-text-size-adjust: 100%;
  touch-action: manipulation;
}

body {
  min-height: 100%;
  padding-bottom: max(18px, var(--safe-bottom));
}

button, input, textarea {
  font: inherit;
  -webkit-tap-highlight-color: transparent;
}

button {
  min-height: 44px;
}

header {
  padding-top: max(14px, calc(10px + var(--safe-top)));
  padding-left: max(16px, var(--safe-left));
  padding-right: max(16px, var(--safe-right));
}

.installHint {
  background: #fff8e8;
  border-bottom: 1px solid #e9c773;
  color: #5d4200;
  padding: 10px max(16px, var(--safe-right)) 10px max(16px, var(--safe-left));
  font-weight: 800;
}

.installHint[hidden] {
  display: none;
}

.appShellNote {
  font-size: 14px;
  opacity: .9;
}

@media (max-width: 900px) {
  body {
    font-size: 19px;
    line-height: 1.6;
  }

  header {
    position: static;
    display: block;
  }

  header h1 {
    font-size: 20px;
    margin-bottom: 8px;
  }

  header .badge {
    display: inline-block;
    margin: 3px 4px 3px 0;
  }

  .layout {
    display: block;
  }

  aside {
    position: static;
    max-height: none;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 12px max(14px, var(--safe-right)) 12px max(14px, var(--safe-left));
  }

  main {
    padding: 14px max(14px, var(--safe-right)) 72px max(14px, var(--safe-left));
  }

  .tabs {
    position: sticky;
    top: 0;
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    padding: 8px 0;
  }

  .tab {
    flex: 0 0 auto;
    white-space: nowrap;
  }

  .lessonBtn {
    font-size: 17px;
    padding: 12px;
  }

  .card {
    border-radius: 14px;
    padding: 16px;
    margin: 12px 0;
  }

  .flashGrid {
    grid-template-columns: repeat(auto-fit, minmax(145px, 1fr));
  }

  .flashcard {
    min-height: 132px;
    font-size: 34px;
    border-radius: 14px;
  }

  .clickChar {
    min-height: 120px;
    font-size: 62px;
  }

  .strokeViewerWrap {
    grid-template-columns: 1fr;
  }

  .strokeTarget {
    width: min(86vw, 360px);
    height: min(86vw, 360px);
  }

  .nativeStrokeSvg {
    width: min(86vw, 360px);
    height: min(86vw, 360px);
  }

  .strokeControls, .tools {
    gap: 10px;
  }

  .traceCanvas {
    max-width: 100%;
  }
}