/* ==========================================================================
   毎日なつかしクイズ - CSSデザインシステム（機能拡張対応）
   ========================================================================== */

/* 1. 基本設定・カラーパレット */
:root {
  --color-bg-base: #f9f6f0;       /* 薄い和紙風のベージュ */
  --color-bg-card: #ffffff;       /* カード背景 */
  --color-text-main: #222222;     /* 濃いグレー */
  --color-text-muted: #555555;    /* 補助テキスト */
  
  /* 正誤カラー */
  --color-correct-bg: #e6f4ea;    /* やさしい緑 */
  --color-correct-border: #137333;/* 濃い緑 */
  --color-incorrect-bg: #fce8e6;  /* やさしい赤 */
  --color-incorrect-border: #c5221f;/* 濃い赤 */
  
  /* アクセント・プライマリ */
  --color-accent: #d97706;        /* 柿色 */
  --color-accent-gold: #fbbf24;   /* 金色 */
  --color-btn-default-bg: #ffffff;
  --color-btn-default-border: #888888;
  --color-btn-primary-bg: #1e3a8a; /* 紺色 */
  --color-btn-primary-text: #ffffff;
  --color-btn-secondary-bg: #4b5563; /* 濃いグレー */
  --color-btn-secondary-text: #ffffff;
  
  --font-family: 'Kosugi Maru', 'Noto Sans JP', sans-serif;
}

/* 2. リセット & ベーススタイル */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--color-bg-base);
  color: var(--color-text-main);
  font-family: var(--font-family);
  font-size: 20px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  padding-bottom: 90px; /* 下部ナビゲーションバーの高さ分の余白 */
}

/* 3. レイアウト */
.app-container {
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
  padding: 16px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

/* 4. ヘッダー */
.app-header {
  padding: 16px 0;
  border-bottom: 3px double #cccccc;
  margin-bottom: 20px;
}

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

.app-title {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-btn-primary-bg);
}

.app-subtitle {
  font-size: 15px;
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* 音声オンオフボタン */
.btn-sound-toggle {
  background-color: var(--color-bg-card);
  border: 2px solid var(--color-text-main);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: 16px;
  font-weight: bold;
  font-family: var(--font-family);
  cursor: pointer;
  box-shadow: 0 2px 0 var(--color-text-main);
  display: inline-flex;
  align-items: center;
  transition: all 0.1s;
}

.btn-sound-toggle:active {
  transform: translateY(1px);
  box-shadow: 0 1px 0 var(--color-text-main);
}

/* 5. メインコンテンツ */
.app-main {
  flex-grow: 1;
}

.screen {
  width: 100%;
}

.hidden {
  display: none !important;
}

/* 6. クイズ進行ヘッダー */
.quiz-progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.badge-mode {
  background-color: var(--color-btn-primary-bg);
  color: #ffffff;
  font-size: 15px;
  font-weight: bold;
  padding: 2px 10px;
  border-radius: 4px;
}

.badge-mode.practice {
  background-color: var(--color-btn-secondary-bg);
}

.badge-date, .badge-step {
  background-color: var(--color-text-main);
  color: #ffffff;
  font-size: 15px;
  font-weight: bold;
  padding: 2px 10px;
  border-radius: 4px;
}

.badge-step {
  background-color: var(--color-accent);
}

/* ドットインジケーター（3問の進行状況） */
.dots-indicator {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 16px;
}

.dot {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid var(--color-text-main);
  background-color: #ffffff;
  display: inline-block;
  transition: background-color 0.2s;
}

/* 正解・不正解・未回答のドット状態 */
.dot.dot-correct {
  background-color: #137333;
  position: relative;
}
.dot.dot-correct::after {
  content: "◯";
  color: #ffffff;
  font-size: 14px;
  font-weight: bold;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.dot.dot-incorrect {
  background-color: #c5221f;
  position: relative;
}
.dot.dot-incorrect::after {
  content: "×";
  color: #ffffff;
  font-size: 16px;
  font-weight: bold;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.dot.dot-active {
  border-color: var(--color-accent);
  background-color: var(--color-accent-gold);
}

/* 7. 問題文エリア */
.question-box {
  background-color: var(--color-bg-card);
  border: 2px solid var(--color-text-main);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 4px 0px rgba(0, 0, 0, 0.15);
}

.question-text {
  font-size: 24px;
  font-weight: 700;
  line-height: 1.5;
}

/* 8. 選択肢ボタン */
.choices-box {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 20px;
}

.btn-choice {
  width: 100%;
  min-height: 60px;
  padding: 12px 16px;
  font-size: 20px;
  font-family: var(--font-family);
  font-weight: bold;
  color: var(--color-text-main);
  background-color: var(--color-btn-default-bg);
  border: 3px solid var(--color-btn-default-border);
  border-radius: 12px;
  cursor: pointer;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 4px 0px var(--color-btn-default-border);
  transition: transform 0.1s, box-shadow 0.1s;
}

.btn-choice:active:not(:disabled) {
  transform: translateY(2px);
  box-shadow: 0 2px 0px var(--color-btn-default-border);
}

.btn-choice.correct {
  background-color: var(--color-correct-bg);
  border-color: var(--color-correct-border);
  color: var(--color-correct-border);
  box-shadow: 0 4px 0px var(--color-correct-border);
}

.btn-choice.incorrect {
  background-color: var(--color-incorrect-bg);
  border-color: var(--color-incorrect-border);
  color: var(--color-incorrect-border);
  box-shadow: 0 4px 0px var(--color-incorrect-border);
}

.choice-symbol {
  font-size: 22px;
  font-weight: bold;
  margin-left: 8px;
}

/* 9. 解説エリア */
.explanation-box {
  background-color: #f0f4f8;
  border-left: 6px solid var(--color-btn-primary-bg);
  padding: 16px;
  border-radius: 4px;
  margin-top: 20px;
  margin-bottom: 24px;
}

.answer-status-alert {
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 8px;
}

.answer-status-alert.status-correct {
  color: var(--color-correct-border);
}

.answer-status-alert.status-incorrect {
  color: var(--color-incorrect-border);
}

.explanation-box h3 {
  font-size: 18px;
  margin-bottom: 6px;
  color: var(--color-btn-primary-bg);
}

.explanation-text {
  font-size: 20px;
  margin-bottom: 16px;
}

/* 10. 結果・実績表示画面 */
.result-card {
  background-color: var(--color-bg-card);
  border: 2px solid var(--color-text-main);
  border-radius: 12px;
  padding: 24px;
  text-align: center;
  margin-bottom: 20px;
  box-shadow: 0 4px 0px rgba(0,0,0,0.1);
}

.result-title {
  font-size: 22px;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.result-emojis {
  font-size: 36px;
  letter-spacing: 4px;
  margin-bottom: 8px;
}

.result-accuracy {
  font-size: 32px;
  font-weight: bold;
  color: var(--color-btn-primary-bg);
  margin-bottom: 16px;
}

.achieve-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.title-badge {
  background-color: var(--color-accent-gold);
  color: var(--color-text-main);
  font-size: 20px;
  font-weight: bold;
  padding: 6px 16px;
  border: 2px solid var(--color-text-main);
  border-radius: 20px;
  box-shadow: 0 3px 0 var(--color-text-main);
}

.streak-text {
  font-size: 20px;
  font-weight: bold;
}

/* ニックネーム登録フォーム */
.nickname-box {
  background-color: var(--color-bg-card);
  border: 2px solid var(--color-text-main);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 20px;
}

.nickname-box h3 {
  font-size: 18px;
  margin-bottom: 4px;
}

.setting-desc {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.nickname-form {
  display: flex;
  gap: 12px;
}

.nickname-form input {
  flex-grow: 1;
  font-size: 20px;
  font-family: var(--font-family);
  padding: 8px 12px;
  border: 2px solid var(--color-text-main);
  border-radius: 8px;
}

.btn-save {
  min-height: auto;
  padding: 8px 20px;
  font-size: 18px;
  background-color: var(--color-btn-primary-bg);
  color: #ffffff;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  box-shadow: 0 3px 0 #0f172a;
}
.btn-save:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 #0f172a;
}

/* 11. 結果の共有機能 */
.share-box {
  background-color: var(--color-bg-card);
  border: 2px solid var(--color-text-main);
  border-radius: 8px;
  padding: 20px;
  text-align: center;
  margin-bottom: 20px;
  box-shadow: 0 4px 0px rgba(0,0,0,0.1);
}

.share-box h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 56px;
  padding: 10px 20px;
  font-size: 20px;
  font-weight: bold;
  font-family: var(--font-family);
  border-radius: 12px;
  cursor: pointer;
  text-decoration: none;
  border: none;
  box-shadow: 0 4px 0px rgba(0,0,0,0.2);
  transition: transform 0.1s, box-shadow 0.1s;
}

.btn:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0px rgba(0,0,0,0.2);
}

.btn-primary {
  background-color: var(--color-btn-primary-bg);
  color: var(--color-btn-primary-text);
  box-shadow: 0 4px 0px #0f172a;
}

.btn-secondary {
  background-color: var(--color-btn-secondary-bg);
  color: var(--color-btn-secondary-text);
  box-shadow: 0 4px 0px #1f2937;
}

.btn-next {
  margin-top: 10px;
}

.copy-toast {
  margin-top: 8px;
  font-size: 16px;
  color: var(--color-correct-border);
  font-weight: bold;
  background-color: var(--color-correct-bg);
  padding: 8px;
  border-radius: 6px;
  display: inline-block;
}

.sns-share-buttons {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.btn-sns {
  font-size: 18px;
  min-height: 50px;
}

.btn-x {
  background-color: #000000;
  color: #ffffff;
  box-shadow: 0 4px 0px #333333;
}

.btn-line {
  background-color: #06c755;
  color: #ffffff;
  box-shadow: 0 4px 0px #048639;
}

.more-play-box {
  background-color: var(--color-bg-card);
  border: 2px solid var(--color-text-main);
  border-radius: 8px;
  padding: 20px;
  text-align: center;
  margin-bottom: 20px;
}
.more-play-box h3 {
  font-size: 20px;
  margin-bottom: 6px;
}
.more-play-box p {
  font-size: 15px;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

/* 12. なつかしスタンプ帳 */
.screen-header {
  margin-bottom: 16px;
  border-bottom: 2px dashed #cccccc;
  padding-bottom: 12px;
}

.screen-title {
  font-size: 24px;
  color: var(--color-btn-primary-bg);
}

.screen-desc {
  font-size: 15px;
  color: var(--color-text-muted);
}

.stamps-stats, .collection-stats {
  background-color: var(--color-bg-card);
  border: 2px solid var(--color-text-main);
  border-radius: 8px;
  padding: 10px 16px;
  font-size: 18px;
  font-weight: bold;
  margin-bottom: 20px;
}

.stamps-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr); /* 5列で配置 */
  gap: 12px;
  background-color: var(--color-bg-card);
  border: 2px solid var(--color-text-main);
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 4px 0 rgba(0,0,0,0.1);
}

.stamp-slot {
  aspect-ratio: 1 / 1;
  border: 2px dashed #bbbbbb;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: #888888;
  position: relative;
  background-color: #fafafa;
}

.stamp-slot.has-stamp {
  border-style: solid;
  border-color: var(--color-text-main);
  background-color: #fefbeb;
}

.stamp-emoji {
  font-size: 28px;
  line-height: 1;
}

.stamp-day-label {
  font-size: 11px;
  position: absolute;
  bottom: 2px;
  font-weight: bold;
  color: var(--color-text-muted);
}

/* 13. おもいでカード（コレクション） */
.collection-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.collection-item {
  background-color: var(--color-bg-card);
  border: 2px solid var(--color-text-main);
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 3px 0 rgba(0,0,0,0.15);
}

.collection-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 8px;
}

.collection-card-id {
  background-color: var(--color-accent);
  color: #ffffff;
  font-size: 13px;
  font-weight: bold;
  padding: 1px 8px;
  border-radius: 4px;
}

.collection-card-q {
  font-size: 18px;
  font-weight: bold;
  margin-top: 4px;
}

.collection-card-exp {
  font-size: 16px;
  background-color: #f3f4f6;
  border-left: 4px solid var(--color-accent);
  padding: 8px 12px;
  border-radius: 4px;
  color: #333333;
}

.no-cards-msg {
  text-align: center;
  padding: 40px 20px;
  background-color: var(--color-bg-card);
  border: 2px dashed #bbbbbb;
  border-radius: 12px;
  color: var(--color-text-muted);
}

/* 14. 賞状（モーダル表示） */
.certificate-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.certificate-container {
  background-color: #fefdfa; /* 賞状らしい和紙っぽい白 */
  width: 100%;
  max-width: 500px;
  border-radius: 8px;
  padding: 16px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.3);
  text-align: center;
  position: relative;
}

.certificate-border {
  border: 4px double #d97706; /* 金色の二重枠 */
  padding: 24px 16px;
  background-color: #fefdfa;
}

.cert-header {
  font-size: 32px;
  font-weight: bold;
  color: #b45309;
  letter-spacing: 6px;
  margin-bottom: 20px;
  border-bottom: 2px solid #f59e0b;
  display: inline-block;
  padding-bottom: 4px;
}

.cert-to {
  font-size: 22px;
  font-weight: bold;
  text-align: left;
  margin-left: 10%;
  margin-bottom: 16px;
}

.cert-body {
  font-size: 18px;
  line-height: 1.8;
  text-align: left;
  margin: 0 auto;
  width: 85%;
  margin-bottom: 24px;
  font-weight: bold;
}

.cert-days {
  color: #b45309;
  font-size: 24px;
}

.cert-date {
  font-size: 16px;
  text-align: right;
  margin-right: 10%;
  margin-bottom: 4px;
}

.cert-from {
  font-size: 16px;
  text-align: right;
  margin-right: 10%;
  font-weight: bold;
}

.btn-close-cert {
  margin-top: 16px;
  width: 80%;
  font-size: 18px;
  min-height: 48px;
}

/* 15. 下部ナビゲーションタブ */
.app-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 600px;
  height: 74px;
  background-color: #ffffff;
  border-top: 3px solid var(--color-text-main);
  display: flex;
  justify-content: space-around;
  align-items: center;
  z-index: 100;
  box-shadow: 0 -4px 10px rgba(0, 0, 0, 0.05);
}

.nav-item {
  flex: 1;
  height: 100%;
  border: none;
  background: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-text-muted);
  font-family: var(--font-family);
  font-weight: bold;
  transition: all 0.2s;
}

.nav-icon {
  font-size: 24px;
  margin-bottom: 2px;
}

.nav-label {
  font-size: 14px;
}

.nav-item.active {
  color: var(--color-btn-primary-bg);
  background-color: #f0f4f8;
}

/* 16. 静的フッター（重なり防止） */
.app-footer-static {
  text-align: center;
  padding: 16px 0;
  border-top: 1px solid #cccccc;
  margin-top: 32px;
}

.footer-note {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 8px;
  line-height: 1.4;
}

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

/* 17. レスポンシブ調整 */
@media (max-width: 380px) {
  body {
    font-size: 18px;
  }
  .app-title {
    font-size: 22px;
  }
  .question-text {
    font-size: 20px;
  }
  .btn-choice {
    font-size: 18px;
    min-height: 54px;
  }
  .btn {
    font-size: 18px;
  }
  .stamps-grid {
    gap: 8px;
    padding: 10px;
  }
  .stamp-emoji {
    font-size: 22px;
  }
}