/* ==========================================================
   クイズ 共通スタイル（5カテゴリで共用）
   ========================================================== */

:root {
  --color-bg-top: #eef1ff;
  --color-bg-bottom: #dce4ff;
  --color-box: #ffffff;
  --color-box-border: #b9c4f7;
  --color-primary: #4b5fd9;
  --color-primary-2: #7c8cf0;
  --color-correct: #2f9e5c;
  --color-wrong: #e0574c;
  --color-text: #2c2f52;
  --color-text-muted: #6b6f9c;
  --color-border: #ccd4f5;
  --header-h: 56px;
  --ad-h: 64px;
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  font-family: "Hiragino Maru Gothic ProN", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Segoe UI", Roboto, Arial, sans-serif;
  background: linear-gradient(180deg, var(--color-bg-top), var(--color-bg-bottom));
  background-attachment: fixed;
  color: var(--color-text);
  min-height: 100dvh;
  user-select: none;
}

/* ---------- ヘッダー ---------- */
.seo-breadcrumb {
  padding: 0.4rem 0.8rem 0;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.seo-breadcrumb a {
  color: var(--color-text-muted);
  text-decoration: none;
}

.seo-breadcrumb a:hover {
  color: var(--color-text);
  text-decoration: underline;
}

.game-header {
  position: sticky;
  top: 0;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 0.8rem;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(6px);
  border-bottom: 2px solid var(--color-border);
  z-index: 20;
}

.back-link {
  color: var(--color-text);
  text-decoration: none;
  font-size: 1.3rem;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.7);
  flex: 0 0 auto;
}

.back-link:active {
  background: rgba(255, 255, 255, 0.95);
}

.game-title {
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  margin: 0;
  color: var(--color-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex: 0 0 auto;
}

.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.7);
  color: var(--color-text);
  font-size: 1.2rem;
  font-weight: bold;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-btn:active {
  background: rgba(255, 255, 255, 0.95);
}

.icon-btn.is-muted {
  color: var(--color-text-muted);
}

/* ---------- メイン ---------- */
.quiz-main {
  max-width: 480px;
  margin: 0 auto;
  padding: 1rem 1rem 0.5rem;
}

/* ---------- 進捗・スコア ---------- */
.quiz-stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.8rem;
  gap: 0.6rem;
}

.quiz-progress {
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--color-text-muted);
  background: rgba(255, 255, 255, 0.7);
  border: 2px solid var(--color-border);
  border-radius: 999px;
  padding: 0.3rem 0.9rem;
}

.quiz-score {
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--color-primary);
  background: rgba(255, 255, 255, 0.7);
  border: 2px solid var(--color-border);
  border-radius: 999px;
  padding: 0.3rem 0.9rem;
}

.quiz-timer {
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--color-text-muted);
  background: rgba(255, 255, 255, 0.7);
  border: 2px solid var(--color-border);
  border-radius: 999px;
  padding: 0.3rem 0.9rem;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

/* ---------- 問題カード ---------- */
.quiz-card {
  background: var(--color-box);
  border: 3px solid var(--color-box-border);
  border-radius: 22px;
  padding: 1.4rem 1.2rem;
  box-shadow: 0 12px 30px rgba(75, 95, 217, 0.15);
}

.quiz-question {
  font-size: 1.05rem;
  font-weight: 800;
  line-height: 1.6;
  margin: 0 0 1.1rem;
  color: var(--color-text);
}

.quiz-choices {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.quiz-choice {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  width: 100%;
  text-align: left;
  border: 2px solid var(--color-border);
  border-radius: 14px;
  background: #fbfbff;
  color: var(--color-text);
  font-size: 0.9rem;
  font-weight: 700;
  padding: 0.75rem 0.9rem;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, transform 0.1s ease;
}

.quiz-choice:active {
  transform: scale(0.98);
}

.quiz-choice__label {
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-primary-2);
  color: #fff;
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.quiz-choice:disabled {
  cursor: default;
}

.quiz-choice.is-correct {
  border-color: var(--color-correct);
  background: rgba(47, 158, 92, 0.12);
}

.quiz-choice.is-correct .quiz-choice__label {
  background: var(--color-correct);
}

.quiz-choice.is-wrong {
  border-color: var(--color-wrong);
  background: rgba(224, 87, 76, 0.1);
}

.quiz-choice.is-wrong .quiz-choice__label {
  background: var(--color-wrong);
}

.quiz-choice.is-dim {
  opacity: 0.55;
}

/* ---------- 解説 ---------- */
.quiz-note {
  margin-top: 1rem;
  padding: 0.8rem 0.9rem;
  background: rgba(75, 95, 217, 0.07);
  border-left: 4px solid var(--color-primary-2);
  border-radius: 10px;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--color-text-muted);
  display: none;
}

.quiz-note.is-visible {
  display: block;
}

.quiz-next-row {
  margin-top: 1.1rem;
  text-align: center;
}

/* ---------- 結果画面 ---------- */
.quiz-result {
  text-align: center;
}

.quiz-result__emoji {
  font-size: 2.6rem;
  margin: 0 0 0.4rem;
}

.quiz-result__title {
  font-size: 1.2rem;
  font-weight: 900;
  color: var(--color-primary);
  margin: 0 0 0.3rem;
}

.quiz-result__score {
  font-size: 2rem;
  font-weight: 900;
  color: var(--color-text);
  margin: 0 0 0.3rem;
}

.quiz-result__time {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--color-primary);
  margin: 0 0 0.3rem;
}

.quiz-result__best {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin: 0 0 1.2rem;
}

.quiz-result__actions {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

/* ---------- 共通ボタン ---------- */
.quiz-btn {
  border: none;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-2));
  color: #fff;
  font-weight: 800;
  font-size: 0.92rem;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  cursor: pointer;
}

.quiz-btn:active {
  filter: brightness(0.92);
}

.quiz-btn--ghost {
  background: rgba(75, 95, 217, 0.1);
  color: var(--color-primary);
}

/* ---------- 広告スペース ---------- */
.ad-slot {
  max-width: 480px;
  margin: 1.4rem auto 1.6rem;
  padding: 1.2rem;
  border: 2px dashed var(--color-border);
  border-radius: 14px;
  color: var(--color-text-muted);
  text-align: center;
  font-size: 0.75rem;
  background: rgba(255, 255, 255, 0.5);
  min-height: var(--ad-h);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* ---------- オーバーレイ（ガイド） ---------- */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(44, 47, 82, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 30;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
  padding: 1rem;
}

.overlay.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.overlay__box {
  text-align: center;
  padding: 1.8rem 2rem;
  background: var(--color-box);
  border: 3px solid var(--color-box-border);
  border-radius: 22px;
  max-width: 85%;
  box-shadow: 0 20px 50px rgba(44, 47, 82, 0.35);
}

.overlay__box--wide {
  max-width: min(92%, 460px);
  max-height: 88%;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.guide-section {
  text-align: left;
  margin: 1rem 0;
}

.guide-section__title {
  font-size: 0.92rem;
  color: var(--color-primary);
  margin: 0 0 0.4rem;
}

.guide-section__text {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.6;
}

.guide-section__list {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.guide-section__list li {
  margin-bottom: 0.3rem;
}

.overlay__title {
  font-size: 1.4rem;
  font-weight: 900;
  margin: 0 0 0.5rem;
  color: var(--color-primary);
}