/* 森林鐵道小學堂 · AGY版 樣式表（learning-style.css） */
:root {
  --bg-cream: #F8F4E8;
  --bg-card: #FFFFFF;
  --bg-wood: #FFF8E7;
  --bg-moss: #E7F2EC;
  --forest-dark: #164A3B;
  --forest-main: #1F6E5A;
  --forest-light: #2E8B73;
  --amber-gold: #F09A2B;
  --amber-soft: #FFE8C2;
  --coral-red: #D9534F;
  --coral-soft: #FDECEA;
  --sky-blue: #2B6CB0;
  --sky-soft: #EBF4FF;
  --text-main: #1E292B;
  --text-muted: #526367;
  --border-wood: #D5C7A9;
  --border-forest: #B5D2C6;
  --shadow-card: 0 4px 12px rgba(22, 74, 59, 0.08);
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
}

*, *::before, *::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  min-height: 100vh;
  background-color: var(--bg-cream);
  color: var(--text-main);
  font-family: "Microsoft JhengHei", "PingFang TC", "Noto Sans TC", sans-serif;
  line-height: 1.5;
  overflow-x: hidden;
}

a {
  color: var(--forest-dark);
  text-decoration: underline;
}

button, input {
  font-family: inherit;
  font-size: 1rem;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
[tabindex="-1"]:focus-visible {
  outline: 3px solid var(--amber-gold);
  outline-offset: 2px;
}

.railway-app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: 1360px;
  margin: 0 auto;
  padding: 10px 16px 20px;
  gap: 10px;
}

/* 頂部車站導覽列 */
.station-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 14px;
  background: linear-gradient(135deg, var(--forest-dark) 0%, var(--forest-main) 100%);
  color: #FFFFFF;
  padding: 10px 16px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  border-bottom: 4px solid var(--amber-gold);
}

.brand-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.bear-conductor {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-titles {
  display: flex;
  flex-direction: column;
}

.station-tag {
  font-size: 0.78rem;
  color: var(--amber-soft);
  letter-spacing: 0.03em;
}

.station-name {
  font-size: 1.15rem;
  font-weight: 700;
}

.trial-badge {
  background: rgba(255, 248, 231, 0.16);
  border: 1px solid rgba(255, 232, 194, 0.55);
  color: #FFF6E0;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
}

.top-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.nav-pill-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1.5px solid rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.12);
  color: #FFFFFF;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}

.nav-pill-btn:hover {
  background: rgba(255, 255, 255, 0.24);
}

.nav-pill-btn.is-active {
  background: var(--amber-gold);
  color: #1B1B1B;
  border-color: #FFFFFF;
}

.nav-link-zhuyin {
  background: #FFF3D6;
  color: var(--forest-dark);
  border-color: var(--amber-gold);
}

.nav-link-zhuyin:hover {
  background: #FFE4A3;
}

.nav-results-btn {
  background: rgba(240, 154, 43, 0.28);
  border-color: var(--amber-soft);
}

/* 儲存提醒 */
.storage-banner {
  background: var(--coral-soft);
  color: #8A1F17;
  border: 2px solid var(--coral-red);
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.92rem;
}

/* 主舞台區 */
.station-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.stage-view {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.stage-view[hidden] {
  display: none !important;
}

/* 首頁 Hero 與車票摘要 */
.hero-card {
  display: grid;
  grid-template-columns: 1fr 290px;
  gap: 16px;
  background: linear-gradient(120deg, #FFFFFF 0%, var(--bg-wood) 100%);
  border: 2px solid var(--border-wood);
  border-radius: var(--radius-lg);
  padding: 14px 18px;
  box-shadow: var(--shadow-card);
  align-items: center;
}

.eyebrow-track {
  margin: 0 0 2px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--forest-main);
}

.stage-heading {
  margin: 0 0 6px;
  font-size: 1.45rem;
  color: var(--forest-dark);
}

.stage-lead {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.stage-subnote {
  margin: 2px 0 0;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.hero-summary-ticket {
  background: var(--bg-moss);
  border: 2px dashed var(--forest-main);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.ticket-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
}

.inline-ticket-link {
  font-weight: 700;
  color: var(--forest-dark);
}

/* 年級卡片網格 */
.grade-section,
.home-grade1-preview {
  background: var(--bg-card);
  border: 1.5px solid var(--border-wood);
  border-radius: var(--radius-lg);
  padding: 12px 16px;
  box-shadow: var(--shadow-card);
}

.section-subtitle {
  margin: 0 0 10px;
  font-size: 1.1rem;
  color: var(--forest-dark);
}

.grade-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 10px;
}

.grade-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: space-between;
  text-align: left;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  border: 2px solid var(--border-wood);
  background: var(--bg-wood);
  cursor: pointer;
  gap: 4px;
  transition: transform 0.12s, border-color 0.15s, box-shadow 0.15s;
}

.grade-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.grade-card.is-open {
  background: linear-gradient(180deg, #F1FBF6 0%, #FFFFFF 100%);
  border-color: var(--forest-main);
}

.grade-card.is-locked {
  background: #F6F5F0;
  border-color: #D2CEC2;
  color: var(--text-muted);
}

.grade-status-tag {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
}

.tag-open {
  background: var(--forest-main);
  color: #FFFFFF;
}

.tag-locked {
  background: #E0DDD3;
  color: #495256;
}

.grade-name {
  font-size: 1.15rem;
  color: var(--text-main);
}

.grade-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.grade-cta {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--forest-dark);
  margin-top: 2px;
}

/* 科目篩選與單元卡片 */
.preview-header,
.stage-top-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.subject-switch-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.subject-tab {
  padding: 6px 14px;
  border-radius: 999px;
  border: 1.5px solid var(--forest-main);
  background: #FFFFFF;
  color: var(--forest-dark);
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
}

.subject-tab.is-active {
  background: var(--forest-main);
  color: #FFFFFF;
}

.unit-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.unit-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: var(--bg-card);
  border: 2px solid var(--border-forest);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  gap: 8px;
  box-shadow: var(--shadow-card);
}

.unit-card.subject-math {
  border-color: #B6D0E8;
}

.unit-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.subject-badge {
  font-size: 0.78rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
}

.badge-chinese {
  background: var(--bg-moss);
  color: var(--forest-dark);
}

.badge-math {
  background: var(--sky-soft);
  color: var(--sky-blue);
}

.unit-stars-pill {
  font-size: 0.82rem;
  font-weight: 700;
  color: #9A5B00;
  background: var(--amber-soft);
  padding: 2px 8px;
  border-radius: 999px;
}

.unit-card-title {
  margin: 0;
  font-size: 1.15rem;
  color: var(--forest-dark);
}

.unit-card-summary {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.unit-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.btn-primary-train,
.btn-secondary-train,
.btn-amber-train {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 7px 13px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  text-decoration: none;
  border: 2px solid transparent;
}

.btn-primary-train {
  background: var(--forest-main);
  color: #FFFFFF;
}

.btn-primary-train:hover {
  background: var(--forest-dark);
}

.btn-secondary-train {
  background: #FFFFFF;
  color: var(--forest-dark);
  border-color: var(--forest-main);
}

.btn-secondary-train:hover {
  background: var(--bg-moss);
}

.btn-amber-train {
  background: var(--amber-gold);
  color: #1B1B1B;
  border-color: #C97A10;
}

.btn-amber-train:hover {
  background: #E28B1B;
}

/* 尚未開放年級面板 */
.locked-panel,
.practice-placeholder-card,
.results-placeholder-card {
  background: var(--bg-card);
  border: 2px solid var(--border-wood);
  border-radius: var(--radius-lg);
  padding: 22px 24px;
  box-shadow: var(--shadow-card);
}

.locked-badge {
  display: inline-block;
  background: var(--amber-soft);
  color: #7D4900;
  font-weight: 700;
  font-size: 0.85rem;
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 8px;
}

.locked-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

/* 單元教學頁 */
.unit-top-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--bg-card);
  border: 2px solid var(--border-forest);
  border-radius: var(--radius-lg);
  padding: 12px 16px;
  box-shadow: var(--shadow-card);
}

.unit-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.crumb-btn {
  background: none;
  border: none;
  padding: 2px 4px;
  color: var(--forest-main);
  font-weight: 700;
  cursor: pointer;
  text-decoration: underline;
}

.unit-action-box {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
}

.unit-mini-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.unit-cta-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.unit-switcher-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  background: var(--bg-wood);
  border: 1.5px solid var(--border-wood);
  border-radius: var(--radius-md);
  padding: 8px 12px;
}

.strip-unit-btn {
  padding: 5px 11px;
  border-radius: 999px;
  border: 1.5px solid var(--border-wood);
  background: #FFFFFF;
  color: var(--text-main);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}

.strip-unit-btn.is-active {
  background: var(--forest-main);
  color: #FFFFFF;
  border-color: var(--forest-dark);
}

/* 3張教學卡 */
.lessons-section,
.wordcards-section {
  background: var(--bg-card);
  border: 1.5px solid var(--border-wood);
  border-radius: var(--radius-lg);
  padding: 14px 16px;
  box-shadow: var(--shadow-card);
}

.lessons-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.lesson-card {
  background: linear-gradient(180deg, var(--bg-wood) 0%, #FFFFFF 100%);
  border: 2px solid var(--border-wood);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.lesson-step-tag {
  align-self: flex-start;
  background: var(--forest-main);
  color: #FFFFFF;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
}

.lesson-title {
  margin: 0;
  font-size: 1.1rem;
  color: var(--forest-dark);
}

.lesson-text {
  margin: 0;
  font-size: 0.96rem;
  color: var(--text-main);
}

.lesson-note {
  margin: 0;
  margin-top: auto;
  padding: 8px 10px;
  background: var(--bg-moss);
  border-left: 4px solid var(--forest-main);
  border-radius: var(--radius-sm);
  font-size: 0.86rem;
  color: var(--forest-dark);
}

/* 生活識字 12 張字卡 */
.wordcards-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 10px;
}

.wordcards-hint {
  margin: 0;
  font-size: 0.86rem;
  color: var(--text-muted);
}

.wordcards-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 10px;
}

.word-card {
  background: var(--bg-wood);
  border: 2px solid var(--border-wood);
  border-radius: var(--radius-md);
  padding: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 4px;
  transition: transform 0.12s, border-color 0.15s;
}

.word-card:hover,
.word-card:focus-within {
  transform: translateY(-2px);
  border-color: var(--forest-main);
}

.word-card-top {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 6px;
}

.word-char {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--forest-dark);
  line-height: 1.1;
}

.word-zhuyin {
  font-size: 0.95rem;
  font-weight: 700;
  color: #9A5B00;
  background: var(--amber-soft);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
}

.word-meaning {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.word-meaning-zhuyin {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* 成果卡片預覽 */
.results-units-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 12px;
}

/* 頁尾 */
.station-footer {
  background: #EFEAD8;
  border: 1px solid var(--border-wood);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.station-footer p {
  margin: 2px 0;
}

.footer-sources {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 響應式配置：平板與手機不水平溢出 */
@media (max-width: 1024px) {
  .hero-card {
    grid-template-columns: 1fr;
  }
  .grade-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .unit-cards-grid,
  .lessons-grid,
  .results-units-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .wordcards-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .railway-app {
    padding: 8px 10px 16px;
  }
  .station-header {
    padding: 10px 12px;
  }
  .grade-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .unit-cards-grid,
  .lessons-grid,
  .results-units-grid {
    grid-template-columns: 1fr;
  }
  .wordcards-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .unit-action-box {
    align-items: flex-start;
    width: 100%;
  }
}


/* 通用 hidden 強制隱藏 */
[hidden] {
  display: none !important;
}

.btn-compact {
  padding: 5px 10px;
  font-size: 0.85rem;
}

.btn-danger-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 7px 13px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  background: #FFFFFF;
  color: #9E2620;
  border: 2px solid var(--coral-red);
}

.btn-danger-outline:hover {
  background: var(--coral-soft);
}

.btn-danger-solid {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.92rem;
  cursor: pointer;
  background: var(--coral-red);
  color: #FFFFFF;
  border: 2px solid #A8322E;
}

.btn-danger-solid:hover {
  background: #B83B37;
}

button:disabled {
  opacity: 0.52;
  cursor: not-allowed;
}

/* 第二輪：10題回合作答視圖（桌面緊湊雙欄，650px高度內按鈕全可見） */
.practice-top-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 14px;
  background: var(--bg-card);
  border: 2px solid var(--border-forest);
  border-radius: var(--radius-md);
  padding: 8px 14px;
  box-shadow: var(--shadow-card);
}

.practice-title-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.practice-mode-pill {
  background: var(--forest-main);
  color: #FFFFFF;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
}

.practice-main-heading {
  margin: 0;
  font-size: 1.25rem;
}

.practice-progress-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.practice-step-text {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--forest-dark);
}

.practice-dots {
  display: flex;
  gap: 5px;
}

.step-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #D9D3C4;
  border: 1px solid #ACA38F;
}

.step-dot.is-current {
  background: var(--amber-gold);
  border-color: #9A5B00;
  transform: scale(1.18);
}

.step-dot.is-solved {
  background: var(--forest-main);
  border-color: var(--forest-dark);
}

.practice-board {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 14px;
  align-items: stretch;
}

.question-pane,
.interaction-pane {
  background: var(--bg-card);
  border: 2px solid var(--border-wood);
  border-radius: var(--radius-lg);
  padding: 12px 16px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 10px;
}

.passage-box {
  background: var(--bg-wood);
  border: 1.5px solid var(--border-wood);
  border-left: 5px solid var(--amber-gold);
  border-radius: var(--radius-md);
  padding: 8px 12px;
}

.passage-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: #8A5200;
}

.passage-text {
  margin: 2px 0;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
}

.passage-zhuyin {
  margin: 0;
  font-size: 0.92rem;
  color: var(--forest-dark);
  font-weight: 600;
}

.prompt-box {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.prompt-word-badge {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  align-self: flex-start;
  background: var(--bg-wood);
  border: 2px solid var(--amber-gold);
  padding: 4px 12px;
  border-radius: var(--radius-md);
}

.prompt-big-word {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--forest-dark);
  line-height: 1.1;
}

.prompt-big-zhuyin {
  font-size: 1rem;
  font-weight: 700;
  color: #8A5200;
}

.question-prompt-text {
  margin: 0;
  font-size: 1.25rem;
  color: var(--text-main);
}

.question-prompt-zhuyin {
  margin: 0;
  font-size: 0.92rem;
  font-weight: 700;
  color: #8A5200;
}

/* 視覺化圖卡舞台（count / compare / arithmetic / shape / position） */
.visual-stage {
  background: #FAF8F2;
  border: 1.5px dashed var(--border-wood);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 120px;
}

.ten-groups-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  align-items: center;
}

.ten-frame {
  display: grid;
  grid-template-columns: repeat(5, 22px);
  gap: 6px;
  padding: 8px 10px;
  background: #FFFFFF;
  border: 2px solid var(--border-forest);
  border-radius: var(--radius-sm);
}

.visual-dot {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--forest-main);
  border: 2px solid var(--forest-dark);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.visual-dot.dot-right-group {
  background: var(--amber-gold);
  border-color: #9A5B00;
}

.visual-dot.is-crossed {
  background: #E8D5D3;
  border-color: var(--coral-red);
}

.visual-dot.is-crossed::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 3px;
  background: var(--coral-red);
  transform: rotate(-35deg);
}

.compare-columns,
.arithmetic-columns {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
}

.visual-pile-card {
  background: #FFFFFF;
  border: 1.5px solid var(--border-wood);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  min-width: 110px;
}

.pile-number-tag {
  font-size: 0.92rem;
  font-weight: 800;
  color: var(--forest-dark);
  background: var(--bg-moss);
  padding: 1px 8px;
  border-radius: 999px;
}

.arith-op-symbol {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--forest-dark);
}

.zero-hint-text {
  font-size: 0.86rem;
  font-weight: 700;
  color: #7D4900;
  background: var(--amber-soft);
  padding: 3px 9px;
  border-radius: var(--radius-sm);
}

.visual-svg {
  max-width: 240px;
  height: auto;
  display: block;
}

/* 選擇題按鈕網格 */
.choice-options-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.choice-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  border: 2px solid var(--border-forest);
  background: #FFFFFF;
  color: var(--text-main);
  cursor: pointer;
  min-height: 62px;
  transition: background 0.12s, border-color 0.12s, transform 0.08s;
}

.choice-btn:hover {
  background: var(--bg-moss);
  border-color: var(--forest-main);
}

.choice-btn.is-correct {
  background: #E3F6EC;
  border-color: #166534;
  color: #0F4C25;
}

.choice-btn.is-wrong {
  background: var(--coral-soft);
  border-color: var(--coral-red);
  color: #7F1D1D;
}

.choice-main-text {
  font-size: 1.2rem;
  font-weight: 800;
}

.choice-zhuyin-text {
  font-size: 0.85rem;
  font-weight: 700;
  color: #7D4900;
}

/* 數字輸入與小鍵盤 */
.number-answer-zone {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.number-input-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.number-label {
  font-weight: 700;
  font-size: 0.95rem;
}

.numeric-input {
  width: 96px;
  padding: 6px 10px;
  font-size: 1.25rem;
  font-weight: 800;
  text-align: center;
  border: 2px solid var(--forest-main);
  border-radius: var(--radius-sm);
  background: #FFFFFF;
}

.number-keypad {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 6px;
}

.num-key {
  padding: 7px 4px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border-wood);
  background: var(--bg-wood);
  font-weight: 800;
  font-size: 1rem;
  cursor: pointer;
}

.num-key:hover {
  background: var(--amber-soft);
  border-color: var(--amber-gold);
}

.num-key-back,
.num-key-clear {
  font-size: 0.84rem;
  background: #F1EFEA;
}

/* 練習區底部回饋與下一題 */
.practice-bottom-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: auto;
  padding-top: 6px;
  border-top: 1.5px solid #EAE4D3;
}

.feedback-box {
  flex: 1;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  background: #F5F2E8;
  border-left: 4px solid var(--forest-main);
  font-size: 0.88rem;
  font-weight: 600;
}

.feedback-box.is-ok {
  background: #E6F6ED;
  border-left-color: #15803D;
  color: #14532D;
}

.feedback-box.is-err {
  background: var(--coral-soft);
  border-left-color: var(--coral-red);
  color: #7F1D1D;
}

.btn-next-q {
  flex-shrink: 0;
  min-width: 112px;
}

/* 成果頁 */
.results-top-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--bg-card);
  border: 2px solid var(--border-forest);
  border-radius: var(--radius-lg);
  padding: 12px 16px;
  box-shadow: var(--shadow-card);
}

.results-top-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.celebration-banner {
  background: linear-gradient(90deg, #FFF3D6 0%, #E7F6EC 100%);
  border: 2px solid var(--amber-gold);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  font-weight: 700;
  color: var(--forest-dark);
}

.results-summary-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.summary-stat-box {
  background: var(--bg-card);
  border: 1.5px solid var(--border-wood);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.summary-stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 600;
}

.summary-stat-val {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--forest-dark);
}

/* 對話框 Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(20, 35, 30, 0.58);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 1000;
}

.modal-card {
  background: #FFFFFF;
  border: 3px solid var(--forest-main);
  border-radius: var(--radius-lg);
  max-width: 460px;
  width: 100%;
  padding: 18px 20px;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.25);
}

.modal-title {
  margin: 0 0 8px;
  font-size: 1.2rem;
  color: var(--forest-dark);
}

.modal-desc {
  margin: 0 0 16px;
  font-size: 0.95rem;
  color: var(--text-main);
}

.modal-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

@media (max-width: 960px) {
  .practice-board {
    grid-template-columns: 1fr;
  }
  .results-summary-strip {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .choice-options-grid {
    grid-template-columns: 1fr;
  }
  .number-keypad {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .practice-bottom-bar {
    flex-direction: column;
    align-items: stretch;
  }
}