/* ===== リセット & 基本設定 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-primary: #0f1117;
  --bg-secondary: #1a1d2e;
  --bg-card: #1e2235;
  --bg-card-hover: #252840;
  --border: #2d3154;
  --text-primary: #e8eaf0;
  --text-secondary: #8b92b3;
  --text-muted: #565f8a;
  --accent: #4f8ef7;
  --accent-hover: #6ba3ff;
  --success: #2ecc71;
  --danger: #e74c3c;
  --warning: #f39c12;
  --pass-line: 70%; /* 700/1000 */
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
}

/* ===== ライトモード ===== */
[data-theme="light"] {
  --bg-primary: #f0f2f7;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #e8ecf5;
  --border: #d0d5e8;
  --text-primary: #1a1d2e;
  --text-secondary: #4a5270;
  --text-muted: #7a82a8;
  --shadow: 0 4px 24px rgba(0,0,0,0.1);
}

/* ===== ブラウザデフォルト（OS設定に従う） ===== */
@media (prefers-color-scheme: light) {
  [data-theme="auto"] {
    --bg-primary: #f0f2f7;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #e8ecf5;
    --border: #d0d5e8;
    --text-primary: #1a1d2e;
    --text-secondary: #4a5270;
    --text-muted: #7a82a8;
    --shadow: 0 4px 24px rgba(0,0,0,0.1);
  }
}

/* ===== テーマ切り替えボタン ===== */
.theme-toggle-btn {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 1000;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
  box-shadow: var(--shadow);
}

.theme-toggle-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  transform: scale(1.1);
}

/* サイドバー内テーマボタンはデスクトップ非表示 */
.sidebar-theme-btn {
  position: static;
  display: none;
  box-shadow: none;
  width: 36px;
  height: 36px;
  font-size: 16px;
  flex-shrink: 0;
}

/* サイドバー下部ボタン行 */
.sidebar-bottom-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: auto;
}

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Hiragino Kaku Gothic ProN', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 15px;
}

/* ===== スクリーン管理 ===== */
.screen { display: none; min-height: 100vh; }
.screen.active { display: block; }

/* ===== ホーム画面 ===== */
.ai-disclaimer {
  background: rgba(243,156,18,0.1);
  border: 1px solid rgba(243,156,18,0.35);
  border-radius: var(--radius-sm);
  color: var(--warning);
  font-size: 13px;
  line-height: 1.6;
  padding: 12px 18px;
  margin-bottom: 32px;
  text-align: center;
}

.home-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 48px 24px;
}

.home-header {
  text-align: center;
  margin-bottom: 48px;
}

.logo {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  color: white;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 3px;
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 16px;
}

.home-header h1 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 15px;
}

/* モードカード */
.mode-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 48px;
}

.mode-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}

/* 用語テスト・模擬試験：1行目に横並び */
#btn-terms    { grid-column: 1; grid-row: 1; }
#btn-cat-exam { grid-column: 2; grid-row: 1; }

/* ドメイン別：2行目フル幅 */
#btn-practice { grid-column: 1 / -1; grid-row: 2; }

.mode-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}


.mode-card h2 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.mode-card p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 16px;
}

.mode-details {
  list-style: none;
  margin-bottom: 24px;
}

.mode-details li {
  font-size: 13px;
  color: var(--text-secondary);
  padding: 4px 0;
}

.mode-details li::before { content: '✓ '; color: var(--success); }

/* ドメイン選択 */
.practice-card {
  display: flex;
  flex-direction: row;
  align-items: stretch;
  padding: 0;
  cursor: default;
}

.practice-card:hover {
  transform: none;
}

.practice-main {
  flex: 0 0 220px;
  padding: 32px;
}

/* デスクトップではボタン非表示（ドメイン一覧は常時表示） */
.practice-main .btn-secondary {
  display: none;
}

.domain-selector {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: 24px 28px;
  border-left: 1px solid var(--border);
}

.domain-selector h3 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-secondary);
}

.domain-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 16px;
}

.domain-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  cursor: pointer;
  text-align: left;
  transition: all 0.15s;
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 6px;
  min-height: 60px;
}

.domain-btn:hover {
  border-color: var(--accent);
  background: var(--bg-card-hover);
}

.domain-btn-name { font-size: 12px; font-weight: 600; flex: 1; line-height: 1.4; }
.domain-btn-count { font-size: 12px; color: var(--text-muted); }
.domain-btn-weight {
  display: inline-block;
  font-size: 11px;
  background: rgba(79,142,247,0.15);
  color: var(--accent);
  padding: 2px 8px;
  border-radius: 10px;
  margin-top: 6px;
}

.domain-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.difficulty-label { font-size: 14px; color: var(--text-secondary); }

select {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 8px 12px;
  font-size: 14px;
  cursor: pointer;
}

/* 成績セクション */
.stats-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

/* アコーディオントリガー */
.stats-accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
}

.stats-accordion-trigger:hover { background: var(--bg-card-hover); }

.stats-accordion-arrow {
  font-size: 12px;
  color: var(--text-muted);
  transition: transform 0.3s ease;
}

.stats-accordion-arrow.open { transform: rotate(180deg); }

/* アコーディオン本体 */
.stats-accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 0 32px;
}

.stats-accordion-body.open {
  max-height: 1200px;
  padding: 0 32px 24px;
}

/* タブ */
.stats-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0;
}

.stats-tab {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
  padding: 8px 16px;
  cursor: pointer;
  margin-bottom: -1px;
  transition: all 0.15s;
}

.stats-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.stats-tab:hover:not(.active) { color: var(--text-secondary); }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.stats-item {
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
}

.stats-item-domain { font-size: 12px; color: var(--text-muted); margin-bottom: 4px; }
.stats-item-score { font-size: 18px; font-weight: 700; color: var(--text-primary); }
.stats-item-detail { font-size: 11px; color: var(--text-secondary); margin-top: 2px; }

/* ===== 問題画面 ===== */
.question-layout {
  display: flex;
  min-height: 100vh;
}

/* サイドバー */
.sidebar {
  width: 240px;
  min-width: 240px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.sidebar-mode {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--accent);
  text-transform: uppercase;
}

.sidebar-block { }

.sidebar-label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.sidebar-value {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
}

.timer { font-variant-numeric: tabular-nums; }
.timer.warning { color: var(--warning); }
.timer.danger { color: var(--danger); animation: pulse 1s infinite; }

@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.5; } }

/* スコアバー */
.estimated-score { }
.score-value { font-size: 28px; font-weight: 700; margin-bottom: 8px; }
.score-bar-wrap { }
.score-bar-bg {
  height: 8px;
  background: var(--bg-primary);
  border-radius: 4px;
  position: relative;
  overflow: visible;
}

.score-bar-fill {
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--danger), var(--warning), var(--success));
  background-size: 1000px 100%;
  transition: width 0.5s ease;
  width: 0%;
}

.score-bar-pass-line {
  position: absolute;
  left: var(--pass-line);
  top: -4px;
  bottom: -4px;
  width: 2px;
  background: white;
  opacity: 0.6;
}

.score-bar-labels {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  color: var(--text-muted);
  margin-top: 4px;
}

.pass-label {
  position: absolute;
  left: var(--pass-line);
  transform: translateX(-50%);
  color: white;
  opacity: 0.7;
}

/* ドメインミニリスト */
.domain-mini-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.domain-mini-item {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-secondary);
}

.domain-mini-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.domain-mini-count { color: var(--text-muted); margin-left: 8px; }

/* ===== メイン問題エリア ===== */
.question-main {
  flex: 1;
  padding: 32px 48px;
  max-width: 800px;
}

.question-header {
  margin-bottom: 28px;
}

.question-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.q-number {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-secondary);
}

.q-domain-badge, .q-difficulty-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 20px;
  letter-spacing: 0.5px;
}

/* 本番試験モードはドメイン・難易度バッジを非表示 */
body.mode-exam .q-domain-badge,
body.mode-exam .q-difficulty-badge { display: none; }

/* 用語テスト・本番・練習モードはドメインミニリストを非表示 */
body.mode-terms #domain-mini-block,
body.mode-exam #domain-mini-block,
body.mode-practice #domain-mini-block { display: none !important; }

.q-domain-badge {
  background: rgba(79,142,247,0.15);
  color: var(--accent);
}

.q-difficulty-badge.easy { background: rgba(46,204,113,0.15); color: var(--success); }
.q-difficulty-badge.medium { background: rgba(243,156,18,0.15); color: var(--warning); }
.q-difficulty-badge.hard { background: rgba(231,76,60,0.15); color: var(--danger); }

.progress-bar-wrap {
  height: 3px;
  background: var(--bg-secondary);
  border-radius: 2px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.4s ease;
  width: 0%;
}

/* 問題テキスト */
.question-text {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-primary);
  margin-bottom: 28px;
  padding: 24px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border-left: 4px solid var(--accent);
}

/* 選択肢 */
.options-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.option-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  cursor: pointer;
  text-align: left;
  font-size: 15px;
  color: var(--text-primary);
  transition: all 0.15s;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  line-height: 1.5;
}

.option-btn:hover:not(:disabled) {
  border-color: var(--accent);
  background: var(--bg-card-hover);
}

.option-btn:disabled { cursor: default; }

.option-label {
  font-weight: 700;
  color: var(--accent);
  min-width: 24px;
}

.option-btn.selected { border-color: var(--accent); background: rgba(79,142,247,0.1); }
.option-btn.correct { border-color: var(--success) !important; background: rgba(46,204,113,0.1) !important; }
.option-btn.incorrect { border-color: var(--danger) !important; background: rgba(231,76,60,0.08) !important; }
.option-btn.correct .option-label { color: var(--success); }
.option-btn.incorrect .option-label { color: var(--danger); }

/* 解説 */
.explanation-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 24px;
}

.explanation-result {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 10px;
}

.explanation-result.correct { color: var(--success); }
.explanation-result.incorrect { color: var(--danger); }

.explanation-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* アクションボタン */
.question-actions { display: flex; gap: 12px; }

/* ===== ボタン共通 ===== */
.btn-primary, .btn-secondary, .btn-outline, .btn-danger, .btn-abort {
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.15s;
}

.btn-primary {
  background: var(--accent);
  color: white;
}

.btn-primary:hover { background: var(--accent-hover); }

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

.btn-secondary:disabled,
.btn-primary:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-outline:hover { color: var(--text-primary); border-color: var(--text-muted); }

.btn-danger {
  background: rgba(231,76,60,0.15);
  color: var(--danger);
  border: 1px solid rgba(231,76,60,0.3);
}

.btn-danger:hover { background: rgba(231,76,60,0.25); }

.btn-sm { padding: 8px 16px; font-size: 13px; }

.btn-abort {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
  font-size: 13px;
  padding: 10px;
  width: 100%;
}

.btn-abort:hover { color: var(--danger); border-color: var(--danger); }

/* ===== 結果画面 ===== */
.result-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 48px 24px;
}

.result-header {
  text-align: center;
  margin-bottom: 48px;
  padding: 40px;
  border-radius: var(--radius);
}

.result-header.pass { background: rgba(46,204,113,0.08); border: 1px solid rgba(46,204,113,0.3); }
.result-header.fail { background: rgba(231,76,60,0.08); border: 1px solid rgba(231,76,60,0.3); }
.result-header.incomplete { background: rgba(243,156,18,0.08); border: 1px solid rgba(243,156,18,0.3); }

.result-verdict {
  font-size: 40px;
  font-weight: 800;
  letter-spacing: 4px;
  margin-bottom: 16px;
}

.result-header.pass .result-verdict { color: var(--success); }
.result-header.fail .result-verdict { color: var(--danger); }
.result-header.incomplete .result-verdict { color: var(--warning); }

.result-score { font-size: 64px; font-weight: 800; margin-bottom: 8px; }
.result-detail { font-size: 15px; color: var(--text-secondary); }

.result-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 40px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
  text-align: center;
}

.stat-label { font-size: 12px; color: var(--text-muted); margin-bottom: 8px; }
.stat-value { font-size: 24px; font-weight: 700; }

.result-domains {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 32px;
}

.result-domains h3 { font-size: 16px; margin-bottom: 20px; }

.domain-results-grid { display: flex; flex-direction: column; gap: 12px; }

.domain-result-row {
  display: grid;
  grid-template-columns: 220px 60px 1fr 60px;
  align-items: center;
  gap: 12px;
  font-size: 14px;
}

.dr-name { color: var(--text-secondary); }
.dr-count { color: var(--text-muted); font-size: 12px; }
.dr-bar-bg {
  height: 6px;
  background: var(--bg-primary);
  border-radius: 3px;
  overflow: hidden;
}

.dr-bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.6s ease;
}

.dr-pct { font-weight: 600; font-size: 13px; }

.result-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 32px;
}

/* 復習セクション */
.review-section { margin-top: 32px; }
.review-section h3 { font-size: 16px; margin-bottom: 20px; }

.review-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 12px;
}

.review-item-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  font-size: 13px;
  color: var(--text-muted);
}

.review-item-q { font-size: 15px; margin-bottom: 8px; color: var(--text-primary); }
.review-item-answer { font-size: 13px; color: var(--danger); margin-bottom: 4px; }
.review-item-correct { font-size: 13px; color: var(--success); margin-bottom: 8px; }
.review-item-exp { font-size: 13px; color: var(--text-secondary); line-height: 1.6; }

/* ===== ローディング ===== */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  z-index: 9999;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }
.loading-text { color: var(--text-secondary); font-size: 14px; }

/* ===== ユーティリティ ===== */
.hidden { display: none !important; }

/* ===== 試験開始モーダル ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 24px;
}

.modal-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  width: 100%;
  max-width: 580px;
  box-shadow: var(--shadow);
}

.modal-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 28px;
}

.modal-section { margin-bottom: 28px; }

.modal-section-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 12px;
}

/* プリセットボタン */
.preset-buttons {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.preset-btn {
  background: var(--bg-secondary);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 12px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  transition: all 0.15s;
  color: var(--text-primary);
}

.preset-btn:hover { border-color: var(--accent); background: var(--bg-card-hover); }
.preset-btn.active { border-color: var(--accent); background: rgba(79,142,247,0.08); }

.preset-icon { font-size: 24px; }
.preset-name { font-size: 13px; font-weight: 600; }
.preset-desc { font-size: 11px; color: var(--text-muted); text-align: center; }

/* トグルリスト */
.toggle-list { display: flex; flex-direction: column; gap: 12px; }

.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  cursor: pointer;
  transition: background 0.1s;
}

.toggle-row:hover { background: var(--bg-card-hover); }

.toggle-label { display: flex; flex-direction: column; gap: 2px; }
.toggle-name { font-size: 14px; font-weight: 600; }
.toggle-desc { font-size: 12px; color: var(--text-muted); }

/* トグルスイッチ */
.toggle-switch { position: relative; flex-shrink: 0; margin-left: 16px; }
.toggle-switch input { opacity: 0; width: 0; height: 0; position: absolute; }

.toggle-track {
  display: block;
  width: 44px;
  height: 24px;
  background: var(--bg-primary);
  border-radius: 12px;
  border: 1px solid var(--border);
  position: relative;
  transition: background 0.2s;
  cursor: pointer;
}

.toggle-track::after {
  content: '';
  position: absolute;
  left: 3px;
  top: 3px;
  width: 16px;
  height: 16px;
  background: var(--text-muted);
  border-radius: 50%;
  transition: all 0.2s;
}

.toggle-switch input:checked + .toggle-track { background: var(--accent); border-color: var(--accent); }
.toggle-switch input:checked + .toggle-track::after { left: 23px; background: white; }

.modal-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

/* 中断確認モーダル */
.abort-modal-box { max-width: 400px; }
.abort-modal-box .modal-actions {
  flex-direction: column;
}
.abort-modal-box .modal-actions button {
  width: 100%;
  white-space: nowrap;
}
.abort-modal-message {
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.6;
}

/* ===== ヒント ===== */
.hint-area { margin-bottom: 16px; }

.hint-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.btn-abort-inline {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 13px;
  padding: 8px 14px;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.btn-abort-inline:hover { color: var(--danger); border-color: var(--danger); }

.btn-hint {
  background: rgba(243,156,18,0.1);
  border: 1px solid rgba(243,156,18,0.3);
  border-radius: var(--radius-sm);
  color: var(--warning);
  font-size: 13px;
  font-weight: 600;
  padding: 8px 16px;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-hint:hover { background: rgba(243,156,18,0.2); }
.btn-hint:disabled { opacity: 0.4; cursor: default; }

.hint-text {
  margin-top: 10px;
  background: rgba(243,156,18,0.06);
  border: 1px solid rgba(243,156,18,0.2);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 13px;
  color: var(--warning);
}

/* ===== 用語テストモードカード ===== */

/* ===== レポートセクション ===== */
.report-section {
  margin-top: 32px;
  border-top: 1px solid var(--border);
  padding-top: 32px;
}

.report-section h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.report-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
}

.report-block h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
}

.report-weakness-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ===== 模擬試験履歴カード ===== */
.exam-history-cards {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  margin-top: 8px;
}

.exam-history-card {
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--bg-secondary);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  padding: 12px 8px;
  text-align: center;
  transition: border-color 0.15s, transform 0.15s;
  color: var(--text-primary);
}

.exam-history-card:hover { transform: translateY(-2px); }
.exam-history-card.pass { border-color: rgba(46,204,113,0.5); background: rgba(46,204,113,0.05); }
.exam-history-card.fail { border-color: rgba(231,76,60,0.5); background: rgba(231,76,60,0.05); }

.ehc-num { font-size: 11px; color: var(--text-muted); }
.ehc-verdict { font-size: 18px; font-weight: 800; letter-spacing: 2px; }
.exam-history-card.pass .ehc-verdict { color: var(--success); }
.exam-history-card.fail .ehc-verdict { color: var(--danger); }
.ehc-score { font-size: 20px; font-weight: 700; }
.ehc-unit { font-size: 12px; font-weight: 400; }
.ehc-date { font-size: 10px; color: var(--text-muted); }
.ehc-report { font-size: 11px; color: var(--accent); margin-top: 4px; }

.exam-history-section { margin-top: 8px; }

/* ===== 模擬試験履歴（旧・未使用） ===== */
.stats-exam-note {
  grid-column: 1 / -1;
  color: var(--danger);
  font-size: 12px;
  padding: 8px 12px;
  background: rgba(239, 68, 68, 0.08);
  border-radius: var(--radius-sm);
  margin-bottom: 4px;
}

.exam-history-section {
  grid-column: 1 / -1;
  margin-top: 16px;
}

.exam-history-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.exam-history-empty {
  font-size: 13px;
  color: var(--text-muted);
  padding: 8px 0;
}

.exam-history-link {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: left;
  margin-bottom: 6px;
  color: var(--text-primary);
  transition: border-color 0.15s;
}

.exam-history-link:hover { border-color: var(--accent); }

.exam-history-date { font-size: 12px; color: var(--text-muted); flex: 1; }

.exam-history-verdict { font-weight: 700; font-size: 14px; min-width: 40px; }
.exam-history-verdict.pass { color: var(--success); }
.exam-history-verdict.fail { color: var(--danger); }

.exam-history-num { font-size: 12px; color: var(--text-muted); min-width: 16px; }
.exam-history-score { font-size: 14px; font-weight: 600; min-width: 60px; }
.exam-history-arrow { font-size: 12px; color: var(--accent); margin-left: auto; white-space: nowrap; }

/* 履歴詳細モーダル */
.history-modal-box { max-width: 560px; max-height: 80vh; overflow-y: auto; }

.history-result-header {
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  text-align: center;
}
.history-result-header.pass { background: rgba(34, 197, 94, 0.12); }
.history-result-header.fail { background: rgba(239, 68, 68, 0.12); }

.history-result-verdict { font-size: 28px; font-weight: 800; }
.history-result-header.pass .history-result-verdict { color: var(--success); }
.history-result-header.fail .history-result-verdict { color: var(--danger); }

.history-result-score { font-size: 20px; font-weight: 700; margin-top: 4px; }
.history-result-meta { font-size: 12px; color: var(--text-secondary); margin-top: 6px; }

.history-report-domains { display: flex; flex-direction: column; gap: 8px; margin-bottom: 16px; }
.history-report-souhyou {
  padding: 14px 16px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-secondary);
  white-space: pre-wrap;
}

.report-insufficient {
  padding: 20px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--warning);
  color: var(--text-secondary);
  line-height: 1.7;
}

.report-domain-row {
  padding: 16px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--border);
}

.report-domain-row.weak {
  border-left-color: var(--danger);
}

.report-domain-row.ok {
  border-left-color: var(--success);
}

.report-domain-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.report-domain-name {
  font-size: 14px;
  font-weight: 600;
  flex: 1;
}

.report-domain-pct {
  font-size: 16px;
  font-weight: 700;
}

.report-weakness-text {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.report-souhyou {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-primary);
}

/* ===== レスポンシブ ===== */
@media (max-width: 768px) {
  .mode-cards { grid-template-columns: 1fr; }
  #btn-terms, #btn-cat-exam, #btn-practice { grid-column: 1; grid-row: auto; }
  .practice-card { flex-direction: column; cursor: pointer; }
  .practice-card:hover { transform: translateY(-2px); }
  .practice-main { flex: none; padding: 24px 20px; }
  .practice-main .btn-secondary { display: inline-flex; }
  body.mode-terms #domain-mini-block,
  body.mode-exam #domain-mini-block,
  body.mode-practice #domain-mini-block { display: none !important; }
  .domain-selector {
    max-height: 0;
    overflow: hidden;
    padding: 0 !important;
    border-left: none !important;
    border-top: 0px solid var(--border);
    opacity: 1;
    transition: max-height 0.45s cubic-bezier(0.4, 0, 0.2, 1),
                padding 0.3s ease !important;
  }
  .domain-selector.open {
    max-height: 600px;
    padding: 20px !important;
    border-top-width: 1px !important;
  }
  .domain-grid { grid-template-columns: repeat(2, 1fr) !important; }
  .question-layout { flex-direction: column; }
  .question-main { padding: 20px 16px; }
  .result-stats { grid-template-columns: repeat(2, 1fr); }
  .domain-result-row { grid-template-columns: 1fr 50px; }
  .dr-bar-bg, .dr-count { display: none; }

  /* モバイル：サイドバーをスティッキー横並びに */
  .sidebar {
    width: 100%;
    height: auto;
    min-width: unset;
    position: sticky;
    top: 0;
    z-index: 100;
    flex-direction: row;
    flex-wrap: nowrap;
    align-items: center;
    padding: 8px 12px;
    gap: 6px;
    overflow-x: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  /* スコアバー・ドメインリストなど重いブロックは非表示 */
  #score-block, #accuracy-block, .sidebar > .sidebar-block:last-of-type { display: none; }

  /* 表示するブロックはコンパクト横並び */
  .sidebar > .sidebar-block {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
    padding: 0;
  }

  .sidebar-label {
    font-size: 10px;
    margin-bottom: 0;
    white-space: nowrap;
  }

  .sidebar-value {
    font-size: 15px;
    font-weight: 700;
  }

  .sidebar-mode {
    font-size: 10px;
    letter-spacing: 1px;
    flex-shrink: 0;
  }

  /* 下部ボタン行を右端に配置 */
  .sidebar-bottom-row {
    margin-left: auto;
    margin-top: 0;
    flex-shrink: 0;
    gap: 6px;
  }

  /* 中断ボタンをコンパクトに */
  .btn-abort {
    margin-top: 0;
    padding: 6px 12px;
    font-size: 13px;
    white-space: nowrap;
  }

  /* サイドバー内テーマボタン表示 */
  .sidebar-theme-btn { display: flex; }

  /* フローティングテーマボタン非表示 */
  .floating-theme-btn { display: none; }

  /* 用語テスト時はドメインバッジを非表示（スマホのみ） */
  body.mode-terms .q-domain-badge { display: none; }
}

/* ===== 再開バナー ===== */
.resume-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #2563eb;
  color: #fff;
  border-radius: 10px;
  padding: 12px 16px;
  margin-bottom: 20px;
  font-size: 14px;
}
.resume-banner.hidden { display: none; }
#resume-banner-text {
  flex: 1;
  font-weight: 600;
}
.btn-resume {
  background: #fff;
  color: #2563eb;
  border: none;
  border-radius: 6px;
  padding: 7px 16px;
  cursor: pointer;
  font-weight: 700;
  font-size: 14px;
  white-space: nowrap;
}
.btn-resume:hover { background: #dbeafe; }
.btn-resume-discard {
  background: transparent;
  color: rgba(255,255,255,0.8);
  border: 1px solid rgba(255,255,255,0.4);
  border-radius: 6px;
  padding: 7px 14px;
  cursor: pointer;
  font-size: 13px;
  white-space: nowrap;
}
.btn-resume-discard:hover { background: rgba(255,255,255,0.1); }

/* ===== BRUTAL MODE ===== */
.brutal-badge {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: #dc2626;
  color: #fff;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  z-index: 9999;
  display: none;
  pointer-events: none;
}
body.brutal-mode .brutal-badge { display: block; }

/* ===== 改善要望ボタン ===== */
.btn-feedback {
  margin-left: auto;
  padding: 6px 12px;
  font-size: 0.78rem;
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity 0.15s;
}
.btn-feedback:hover { opacity: 1; }

/* ===== 改善要望モーダル ===== */
.feedback-modal-box { max-width: 440px; }
.feedback-meta {
  font-size: 0.8rem;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border-radius: 6px;
  padding: 8px 10px;
  margin-bottom: 14px;
  word-break: break-all;
}
.feedback-category-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 8px;
}
.feedback-category-item {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 0.92rem;
}
.feedback-category-item input { accent-color: var(--accent); }
.feedback-textarea {
  width: 100%;
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px;
  font-size: 0.9rem;
  resize: vertical;
  margin-top: 6px;
  box-sizing: border-box;
}
.feedback-error {
  color: var(--danger);
  font-size: 0.82rem;
  margin-top: 4px;
}
.modal-section { margin-bottom: 14px; }
.modal-section-label {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

/* ===== トースト ===== */
.feedback-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--accent);
  color: #fff;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 0.9rem;
  opacity: 0;
  transition: opacity 0.2s, transform 0.2s;
  pointer-events: none;
  z-index: 9999;
}
.feedback-toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ===== 管理ページ ===== */
.admin-wrap {
  max-width: 800px;
  margin: 0 auto;
  padding: 24px 16px;
}
.admin-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 10px;
}
.admin-header-row h2 { margin: 0; }
.admin-header-actions { display: flex; gap: 8px; }
.admin-empty {
  text-align: center;
  color: var(--text-secondary);
  padding: 40px 0;
}
.admin-entry {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  margin-bottom: 10px;
}
.admin-entry-header {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.admin-entry-time { font-size: 0.8rem; color: var(--text-secondary); }
.admin-entry-qid {
  font-size: 0.82rem;
  font-weight: 700;
  background: var(--bg-primary);
  border-radius: 4px;
  padding: 2px 6px;
}
.admin-entry-category {
  font-size: 0.82rem;
  color: var(--warning);
  font-weight: 600;
}
.admin-entry-delete { margin-left: auto; padding: 3px 8px; font-size: 0.78rem; }
.admin-entry-qtext {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 6px;
  word-break: break-all;
}
.admin-entry-comment {
  font-size: 0.88rem;
  margin-top: 6px;
  padding: 6px 8px;
  background: var(--bg-primary);
  border-radius: 4px;
  word-break: break-all;
}