:root {
  /* 長頸鹿美語品牌橘黃 */
  --primary: #E8830C;
  --primary-dark: #C26A00;
  --primary-soft: #FFF3E4;
  --bg: #FAF7F2;
  --card: #ffffff;
  --text: #2b2620;
  --muted: #8a8175;
  --border: #eae3d8;
  --green: #16a34a;
  --red: #dc2626;
  --amber: #d97706;
  /* 熱圖色票（集中管理，格內另有百分比數字輔助） */
  --hm-hi: #dcfce7;
  --hm-mid: #fef9c3;
  --hm-lo: #fee2e2;
  --hm-na-bg: #f1f0ec;
  --hm-na-fg: #a8a297;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.topbar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { display: flex; align-items: baseline; gap: 8px; padding: 14px 0; }
.logo { font-size: 22px; }
.title { font-size: 18px; font-weight: 700; }
.subtitle { font-size: 13px; color: var(--muted); }

.tabs { display: flex; gap: 4px; }
.tab {
  border: none; background: none; padding: 16px 14px;
  font-size: 15px; cursor: pointer; color: var(--muted);
  border-bottom: 3px solid transparent;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }

main { max-width: 1100px; margin: 0 auto; padding: 24px; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

h2 { font-size: 20px; margin: 8px 0 16px; }

.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; padding: 20px; margin-bottom: 16px;
}

.form-row { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.form-row > label:first-child { width: 110px; font-weight: 600; flex-shrink: 0; }
.form-row input[type="text"] { flex: 1; min-width: 200px; }
input[type="text"], input[type="number"], select {
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 14px; font-family: inherit;
}
input[type="number"] { width: 70px; }

.check-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 6px; flex: 1; }
.check-grid label, .inline-check { display: flex; align-items: center; gap: 6px; font-size: 14px; cursor: pointer; }

.diff-inputs { display: flex; align-items: center; gap: 8px; }
.diff-badge { padding: 2px 10px; border-radius: 20px; font-size: 13px; font-weight: 600; }
.diff-基礎 { background: #dcfce7; color: #15803d; }
.diff-一般 { background: #dbeafe; color: #1d4ed8; }
.diff-進階 { background: #fee2e2; color: #b91c1c; }

.btn {
  padding: 9px 18px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--card); font-size: 14px; cursor: pointer; font-family: inherit;
}
.btn:hover { background: var(--bg); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; font-weight: 600; }
.btn.primary:hover { background: var(--primary-dark); }
.btn.danger { color: var(--red); }
.btn.small { padding: 5px 10px; font-size: 13px; }

.hint { font-size: 13px; color: var(--muted); }

/* 題庫列表 */
.filter-bar { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; align-items: center; }
.q-item {
  background: var(--card); border: 1px solid var(--border); border-radius: 10px;
  padding: 14px 16px; margin-bottom: 10px;
}
.q-head { display: flex; gap: 8px; align-items: center; margin-bottom: 6px; flex-wrap: wrap; }
.q-id { font-weight: 700; color: var(--primary); font-size: 13px; }
.q-tag { font-size: 12px; background: var(--bg); border-radius: 6px; padding: 2px 8px; color: var(--muted); }
.q-stem { font-size: 15px; line-height: 1.6; }
.q-answer { margin-top: 8px; padding: 10px; background: #f0fdf4; border-radius: 8px; font-size: 13px; line-height: 1.7; }
.q-figure { margin-top: 8px; }

/* 試卷管理 */
.exam-card {
  background: var(--card); border: 1px solid var(--border); border-radius: 10px;
  padding: 16px; margin-bottom: 10px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.exam-card .name { font-weight: 700; font-size: 16px; }
.exam-card .meta { color: var(--muted); font-size: 13px; flex: 1; }
.exam-actions { display: flex; gap: 6px; }

/* 成績表格 */
.score-grid { overflow-x: auto; }
.score-grid table { border-collapse: collapse; font-size: 13px; background: var(--card); }
.score-grid th, .score-grid td { border: 1px solid var(--border); padding: 5px 7px; text-align: center; }
.score-grid th { background: var(--bg); position: sticky; top: 0; }
.score-grid td.student-name { text-align: left; font-weight: 600; min-width: 80px; }
.mark-cell { cursor: pointer; width: 36px; user-select: none; }
.mark-cell.correct { background: #dcfce7; color: #15803d; font-weight: 700; }
.mark-cell.wrong { background: #fee2e2; color: #b91c1c; font-weight: 700; }

/* 熱圖 */
.heatmap { overflow-x: auto; margin-top: 16px; }
.heatmap table { border-collapse: collapse; font-size: 13px; background: var(--card); }
.heatmap th, .heatmap td { border: 1px solid var(--border); padding: 6px 8px; text-align: center; }
.heatmap th.skill-name { writing-mode: vertical-rl; text-orientation: mixed; max-height: 140px; font-weight: 500; }
.report-block {
  background: var(--card); border: 1px solid var(--border); border-radius: 10px;
  padding: 16px; margin-bottom: 12px;
}
.report-block h4 { margin: 0 0 8px; }
.weak-item { padding: 8px 0; border-top: 1px dashed var(--border); font-size: 14px; line-height: 1.7; }
.weak-item:first-of-type { border-top: none; }
.weak-skill { font-weight: 700; color: var(--red); }

/* ============ 列印樣式 ============ */
#print-area { display: none; }

@media print {
  body { background: #fff; }
  .no-print { display: none !important; }
  main { max-width: none; padding: 0; }
  #print-area { display: block; }

  .print-page { page-break-after: always; }
  .print-page:last-child { page-break-after: auto; }
}

/* 試卷版面（螢幕預覽與列印共用） */
.paper {
  background: #fff; color: #000;
  font-size: 14px; line-height: 1.7;
  max-width: 210mm; margin: 0 auto 20px;
  padding: 14mm 16mm;
  border: 1px solid var(--border);
}
@media print { .paper { border: none; margin: 0; padding: 4mm 2mm; } }

.paper-header { text-align: center; border-bottom: 2px solid #000; padding-bottom: 8px; margin-bottom: 6px; }
.paper-header .school { font-size: 13px; letter-spacing: 2px; }
.paper-header .exam-title { font-size: 20px; font-weight: 700; margin: 4px 0; }
.paper-header .fields { display: flex; justify-content: space-between; font-size: 13px; margin-top: 8px; }

.paper-q { margin: 12px 0; page-break-inside: avoid; display: flex; gap: 8px; }
.paper-q .num { font-weight: 700; flex-shrink: 0; }
.paper-q .body { flex: 1; }
.paper-q .tags { font-size: 11px; color: #666; margin-left: 6px; }
.answer-space { border-bottom: 1px solid #999; height: 3em; margin-top: 6px; }
.paper-q svg { display: block; margin-top: 6px; }

.teacher-ans { margin-top: 6px; padding: 8px 10px; background: #f6f6f6; border-left: 3px solid #888; font-size: 13px; }
@media print { .teacher-ans { background: #f2f2f2; -webkit-print-color-adjust: exact; } }

/* ============ 分頁式學生卷（含掃描定位） ============ */
.paper-page {
  position: relative;
  width: 794px; height: 1122px;
  background: #fff; color: #000;
  font-size: 14px; line-height: 1.7;
  margin: 0 auto 20px;
  border: 1px solid var(--border);
  overflow: hidden;
}
@media print {
  @page { size: A4; margin: 0; }
  .paper-page { border: none; margin: 0; }
}
.align-marker {
  position: absolute; background: #000;
  -webkit-print-color-adjust: exact; print-color-adjust: exact;
}
.pp-header { position: absolute; text-align: center; border-bottom: 2px solid #000; padding-bottom: 8px; }
.pp-header .school { font-size: 13px; letter-spacing: 2px; }
.pp-header .exam-title { font-size: 20px; font-weight: 700; margin: 4px 0; }
.pp-header .fields { display: flex; justify-content: space-between; font-size: 13px; margin-top: 8px; }
.pp-header.small { text-align: left; font-size: 13px; color: #444; border-bottom: 1px solid #999; padding-bottom: 4px; }
.pp-q { position: absolute; margin: 0; }
.mark-box {
  position: absolute; border: 1.5px solid #000; border-radius: 3px;
}
.mark-box span {
  position: absolute; top: -1px; left: -1px; font-size: 9px; color: #666;
  background: #fff; padding: 0 2px; line-height: 1;
}
.pp-footer {
  position: absolute; bottom: 40px; left: 64px; right: 64px;
  font-size: 10px; color: #777; text-align: center;
}
.ans-box {
  position: absolute; border: 1.5px solid #555; border-radius: 4px; background: #fff;
}
.ans-box span {
  position: absolute; top: -1px; left: -1px; font-size: 9px; color: #888;
  background: #fff; padding: 0 2px; line-height: 1;
}
.ans-crop { max-height: 44px; max-width: 170px; border: 1px solid var(--border); border-radius: 4px; background: #fff; }
.row-uncertain td { background: #fffbeb; }

/* 批次掃描 */
.batch-card { padding: 12px 16px; }
.batch-card details { margin-top: 4px; }
.batch-fail { border-color: #fecaca; }

/* 預覽中的單題替換按鈕 */
.swap-btn {
  position: absolute; right: -2px; top: -10px;
  font-size: 11px; padding: 2px 8px;
  border: 1px solid var(--border); border-radius: 12px;
  background: var(--card); color: var(--primary); cursor: pointer;
}
.swap-btn:hover { background: var(--bg); }
.pp-q { overflow: visible; }

/* Toast 通知 */
#toast-wrap {
  position: fixed; top: 68px; right: 18px; z-index: 300;
  display: flex; flex-direction: column; gap: 8px; pointer-events: none;
}
.toast {
  background: #2b2620; color: #fff; padding: 11px 16px; border-radius: 10px;
  font-size: 14px; box-shadow: 0 6px 20px rgba(0,0,0,.18);
  display: flex; gap: 14px; align-items: center; pointer-events: auto;
  animation: toast-in .18s ease-out;
}
.toast button {
  background: none; border: none; color: #fbbf24; font-weight: 700;
  cursor: pointer; font-size: 14px; font-family: inherit; padding: 0;
}
@keyframes toast-in { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .toast { animation: none; } }

/* 拖放上傳區 */
.dropzone {
  border: 2px dashed var(--border); border-radius: 12px;
  padding: 24px 16px; text-align: center; color: var(--muted);
  cursor: pointer; background: var(--card); font-size: 14.5px;
  transition: border-color .15s, background .15s;
}
.dropzone:hover, .dropzone.dragover {
  border-color: var(--primary); background: var(--primary-soft); color: var(--primary-dark);
}

/* 批次進度 */
.progress { height: 10px; background: var(--border); border-radius: 6px; overflow: hidden; flex: 1; min-width: 160px; }
.progress > div { height: 100%; background: var(--primary); transition: width .25s; }

/* 列印前檢查彈窗 */
.modal-mask {
  position: fixed; inset: 0; background: rgba(35, 28, 18, .55); z-index: 400;
  display: flex; align-items: center; justify-content: center; padding: 20px;
}
.modal { background: var(--card); border-radius: 14px; max-width: 500px; padding: 24px 28px; }
.modal h3 { margin: 0 0 12px; font-size: 18px; }
.modal ol { margin: 0 0 16px; padding-left: 22px; line-height: 1.9; font-size: 14.5px; }
.modal .modal-actions { display: flex; gap: 10px; justify-content: flex-end; align-items: center; }

/* 首次使用導覽 */
.first-run { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; margin-bottom: 20px; }
.first-run .step {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 16px 18px; font-size: 14px; line-height: 1.7;
}
.first-run .step b { display: block; font-size: 16px; margin-bottom: 4px; }
.first-run .step .num { color: var(--primary); font-weight: 800; margin-right: 6px; }

/* 熱圖與成績圖例 */
.hm-hi { background: var(--hm-hi); }
.hm-mid { background: var(--hm-mid); }
.hm-lo { background: var(--hm-lo); }
.hm-na { background: var(--hm-na-bg); color: var(--hm-na-fg); }
.legend { display: flex; gap: 16px; font-size: 13px; color: var(--muted); align-items: center; margin: 4px 0 8px; flex-wrap: wrap; }
.legend .chip { display: inline-block; width: 14px; height: 14px; border-radius: 4px; vertical-align: -2px; margin-right: 4px; border: 1px solid var(--border); }
.mark-cell:focus { outline: 2px solid var(--primary); outline-offset: -2px; }

/* 預覽容器：小螢幕橫向捲動而非撐破頁面 */
#build-preview { overflow-x: auto; }

/* 家長版報告 */
.parent-report { font-size: 15px; }
.parent-report .pr-band {
  background: var(--primary); color: #fff; border-radius: 10px;
  padding: 16px 22px; margin-bottom: 6px;
  -webkit-print-color-adjust: exact; print-color-adjust: exact;
}
.parent-report .pr-band .school { font-size: 12px; letter-spacing: 2px; opacity: .92; }
.parent-report .pr-band .title { font-size: 22px; font-weight: 800; margin-top: 2px; }
.parent-report .pr-fields { display: flex; justify-content: space-between; font-size: 13px; color: #555; margin: 8px 2px 0; flex-wrap: wrap; gap: 4px 16px; }
.parent-report .pr-score { text-align: center; margin: 22px 0 8px; }
.parent-report .pr-pct { font-size: 46px; font-weight: 700; }
.parent-report .pr-pct-label { display: block; font-size: 13px; color: #555; margin-top: 2px; }
.parent-report .pr-intro { color: #444; margin: 14px 0 18px; }
.parent-report .pr-focus {
  border: 1px solid #ccc; border-radius: 10px;
  padding: 14px 18px; margin-bottom: 14px; page-break-inside: avoid;
}
.parent-report .pr-focus-title { font-weight: 700; font-size: 16px; margin-bottom: 6px; }
.parent-report .pr-note { color: #666; font-size: 13px; margin-top: 20px; }

/* 掃描結果 */
.scan-flex { display: flex; gap: 16px; flex-wrap: wrap; }
.scan-canvas { flex: 1; min-width: 300px; }
.scan-canvas canvas { border: 1px solid var(--border); border-radius: 8px; }
.scan-table { flex: 1; min-width: 320px; max-height: 560px; overflow-y: auto; }
.scan-table table { border-collapse: collapse; font-size: 13px; width: 100%; }
.scan-table th, .scan-table td { border: 1px solid var(--border); padding: 5px 8px; text-align: center; }
.scan-table th { background: var(--bg); }