/* かるたクイズ。配色・角丸・タップ領域は札ログ(fudalog)の style.css のトークンに合わせている。 */
:root {
  --color-bg: #f5f3ee;
  --color-surface: #ffffff;
  --color-text: #2a241c;
  --color-text-muted: #756b5c;
  --color-primary: #a8452f;
  --color-primary-dark: #8a3623;
  --color-ok: #2f6b4f;
  --color-ok-bg: #e6f1ea;
  --color-ng: #a8452f;
  --color-ng-bg: #f6e8e3;
  --color-border: #ded7c9;
  --radius: 10px;
  --tap-min: 48px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  max-width: 100%;
  overflow-x: hidden;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "Segoe UI", sans-serif;
  line-height: 1.7;
  -webkit-tap-highlight-color: transparent;
}

.site-header {
  display: flex;
  align-items: center;
  background: var(--color-primary);
  padding: 0 16px;
}
.site-header a {
  display: flex;
  align-items: center;
  min-height: 52px;
  color: #fff;
  font-weight: bold;
  text-decoration: none;
}

.site-footer {
  max-width: 640px;
  margin: 0 auto;
  padding: 20px 16px;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}
.site-footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
}
.site-footer__nav a {
  color: var(--color-text-muted);
}

/* ふりがなモードの切り替え。ヘッダーとは分離し、画面右上に独立した帯として表示する */
.furigana-bar {
  display: flex;
  justify-content: flex-end;
  padding: 6px 16px;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}
.furigana-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: var(--tap-min);
  padding: 4px 0;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.furigana-toggle__input {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.furigana-toggle__track {
  position: relative;
  flex-shrink: 0;
  width: 40px;
  height: 22px;
  background: var(--color-border);
  border-radius: 999px;
  transition: background 0.15s ease;
}
.furigana-toggle__thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.25);
  transition: transform 0.15s ease;
}
.furigana-toggle__input:checked + .furigana-toggle__track {
  background: var(--color-primary);
}
.furigana-toggle__input:checked + .furigana-toggle__track .furigana-toggle__thumb {
  transform: translateX(18px);
}
.furigana-toggle__input:focus-visible + .furigana-toggle__track {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* ふりがな（ルビ） */
ruby { ruby-position: over; }
rt {
  font-size: 0.55em;
  font-weight: normal;
  color: var(--color-text-muted);
  user-select: none;
}

.quiz-main {
  max-width: 560px;
  margin: 0 auto;
  padding: 20px 16px 48px;
}

h1, h2 { line-height: 1.4; }
[tabindex="-1"]:focus { outline: none; }

.quiz-title { font-size: 1.6rem; margin: 8px 0 4px; }
.quiz-lead { margin: 0 0 20px; color: var(--color-text-muted); }
.quiz-section-title { font-size: 1.05rem; margin: 28px 0 10px; }
.quiz-error { padding: 16px; background: var(--color-ng-bg); border-radius: var(--radius); }

/* ボタン */
.btn {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: var(--tap-min);
  padding: 10px 18px;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius);
  font: inherit;
  font-weight: bold;
  cursor: pointer;
  text-decoration: none;
}
.btn--block { display: flex; width: 100%; margin-top: 12px; }
.btn--large { min-height: 56px; font-size: 1.1rem; }
.btn--primary { background: var(--color-primary); color: #fff; }
.btn--primary:active { background: var(--color-primary-dark); }
.btn--outline { background: var(--color-surface); color: var(--color-primary); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn__sub { font-size: 0.8rem; font-weight: normal; opacity: 0.9; }

button:focus-visible, a:focus-visible {
  outline: 3px solid #1a5fb4;
  outline-offset: 2px;
}

/* 出題数セレクター */
.count-selector {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin: 20px 0 4px;
}
.count-selector__label { font-size: 0.9rem; color: var(--color-text-muted); }
.count-selector__options { display: flex; gap: 8px; flex-wrap: wrap; }
.count-btn {
  min-height: 36px;
  padding: 4px 14px;
  font: inherit;
  font-size: 0.9rem;
  font-weight: bold;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  cursor: pointer;
}
.count-btn:active { border-color: var(--color-primary); }
.count-btn.is-active { color: #fff; background: var(--color-primary); border-color: var(--color-primary); }

/* これまでの回答履歴（localStorage） */
.history-summary {
  margin: 0 0 16px;
  padding: 12px 14px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}
.history-summary__text { margin: 0 0 8px; font-size: 0.9rem; color: var(--color-text-muted); }
.history-summary__text strong { color: var(--color-text); font-size: 1.1rem; }
.history-summary .btn { margin-top: 0; }

/* カテゴリー */
.category-list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 8px;
}
.category-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 2px;
  width: 100%;
  min-height: 64px;
  padding: 10px 12px;
  text-align: left;
  font: inherit;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
}
.category-btn:active { border-color: var(--color-primary); }
.category-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.category-btn__name { font-weight: bold; line-height: 1.4; }
.category-btn__count { font-size: 0.85rem; color: var(--color-text-muted); }

/* 問題 */
.quiz-progress { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.quiz-progress__num { font-weight: bold; white-space: nowrap; }
.quiz-progress progress { flex: 1; height: 8px; accent-color: var(--color-primary); }
.quiz-q { font-size: 1.3rem; margin: 0 0 24px; min-height: 4.5em; }

.answer-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.answer-btn {
  min-height: 96px;
  font: inherit;
  font-size: 3rem;
  font-weight: bold;
  line-height: 1;
  background: var(--color-surface);
  border: 3px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
}
.answer-btn--true { color: var(--color-ok); }
.answer-btn--false { color: var(--color-ng); }
.answer-btn:not(:disabled):active { background: var(--color-bg); }
.answer-btn:disabled { cursor: default; opacity: 0.5; }
.answer-btn.is-chosen { opacity: 1; border-color: currentColor; background: var(--color-bg); }

/* 回答後。色に加えて記号・文字で正誤を示す */
.feedback { margin-top: 20px; padding: 16px; border-radius: var(--radius); border: 2px solid; background: var(--color-surface); }
.feedback--ok { border-color: var(--color-ok); background: var(--color-ok-bg); }
.feedback--ng { border-color: var(--color-ng); background: var(--color-ng-bg); }
.feedback__title { margin: 0 0 4px; font-size: 1.4rem; }
.feedback--ok .feedback__title { color: var(--color-ok); }
.feedback--ng .feedback__title { color: var(--color-ng); }
.feedback__answer { margin: 0 0 8px; }
.feedback__yours { color: var(--color-text-muted); font-size: 0.9rem; }
.feedback__explanation { margin: 0; white-space: pre-line; }

.quiz-quit {
  display: block;
  margin: 28px auto 0;
  min-height: var(--tap-min);
  padding: 0 12px;
  background: none;
  border: 0;
  font: inherit;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  text-decoration: underline;
  cursor: pointer;
}

/* 結果 */
.quiz-result { text-align: center; }
.result-score { font-size: 1.3rem; margin: 12px 0 0; }
.result-score strong { font-size: 3rem; color: var(--color-primary); }
.result-rate { margin: 0 0 16px; font-size: 1.1rem; }
.result-rate strong { font-size: 1.6rem; }
.result-counts { display: flex; justify-content: center; gap: 12px; margin: 0 0 12px; }
.result-counts div { flex: 1; max-width: 160px; padding: 10px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); }
.result-counts dt { font-size: 0.85rem; color: var(--color-text-muted); }
.result-counts dd { margin: 0; font-size: 1.3rem; font-weight: bold; }
.result-perfect { font-weight: bold; color: var(--color-ok); }

/* 復習 */
.review-list { list-style: none; margin: 16px 0 8px; padding: 0; display: grid; gap: 14px; }
.review-item { padding: 14px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); }
.review-item__q { margin: 0 0 10px; font-size: 1.05rem; }
.review-label { display: block; font-size: 0.8rem; font-weight: bold; color: var(--color-text-muted); }
.review-item__dl { display: flex; gap: 12px; margin: 0 0 10px; }
.review-item__dl div { flex: 1; padding: 8px; background: var(--color-bg); border-radius: 8px; text-align: center; }
.review-item__dl dt { font-size: 0.8rem; color: var(--color-text-muted); }
.review-item__dl dd { margin: 0; font-size: 1.5rem; font-weight: bold; }
.review-item__exp { margin: 0; white-space: pre-line; }

@media (prefers-reduced-motion: no-preference) {
  .feedback { animation: fade-in 0.2s ease-out; }
  @keyframes fade-in { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
}

/* 運営管理用の問題ID表示（目立たせない） */
.question-id { margin: 16px 0 0; font-size: 0.75rem; color: var(--color-text-muted); text-align: right; }
.review-item .question-id { margin: -6px 0 10px; text-align: left; }

/* 用語の意味（折りたたみ） */
.glossary { margin: -8px 0 16px; font-size: 0.9rem; color: var(--color-text-muted); }
.glossary summary { min-height: 32px; padding: 4px 0; cursor: pointer; text-decoration: underline; }
.glossary dl { margin: 4px 0 0; padding: 10px 12px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); }
.glossary dt { font-weight: bold; color: var(--color-text); }
.glossary dd { margin: 0 0 8px; }
.glossary dd:last-child { margin-bottom: 0; }

/* 実戦知識（規程に明記されていない内容）の注記 */
.practical-note { margin: 10px 0 0; padding: 6px 10px; font-size: 0.85rem; color: var(--color-text-muted); background: rgba(0, 0, 0, 0.04); border-radius: 8px; }