/* ============================================================
   漢字ドリル — スタイルシート  v3.1
   ============================================================ */

/*
 * ── [hidden] 属性の強制適用 ──────────────────────────────────
 * ブラウザのデフォルトスタイル [hidden]{display:none} は
 * 作者スタイルシートの display:flex/block などに上書きされる。
 * !important で確実に hidden 属性を機能させる。
 * （flex 等で表示するには JS で .hidden = false する）
 */
[hidden] { display: none !important; }

/* ---------- CSS変数 ---------- */
:root {
  --color-pink:       #ff8fab;
  --color-pink-lt:    #ffc2d4;
  --color-pink-bg:    #fff0f4;
  --color-yellow:     #ffd166;
  --color-yellow-lt:  #ffe8a1;
  --color-yellow-bg:  #fffbec;
  --color-green:      #70c1a3;
  --color-green-lt:   #a8ddc9;
  --color-green-bg:   #edfaf5;
  --color-blue:       #74b3ce;
  --color-purple-lt:  #d4c6f0;
  --color-bg:         #fff9f0;
  --color-text:       #3a3a3a;
  --color-text-lt:    #999;
  --color-white:      #ffffff;

  --grade1-color: #ff8fab; --grade1-bg: #fff0f4;
  --grade2-color: #ffd166; --grade2-bg: #fffbec;
  --grade3-color: #70c1a3; --grade3-bg: #edfaf5;

  --font-main:  'Hiragino Maru Gothic ProN', 'Rounded Mplus 1c', 'BIZ UDPGothic', sans-serif;
  --font-kanji: 'Hiragino Mincho ProN', 'Yu Mincho', 'BIZ UDPMincho', serif;

  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --shadow-sm:    0 2px 8px rgba(0,0,0,0.08);
  --shadow-card:  0 4px 16px rgba(0,0,0,0.10);
  --shadow-modal: 0 8px 40px rgba(0,0,0,0.18);
  --spring: 0.24s cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease:   0.22s ease;
}

/* ---------- リセット ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100dvh;
  padding-bottom: 48px;
  -webkit-font-smoothing: antialiased;
}

/* ============================================================
   ヘッダー
   ============================================================ */
.app-header {
  background: linear-gradient(135deg, var(--color-pink) 0%, #c9b3e8 100%);
  padding: 18px 16px 12px;
  text-align: center;
  box-shadow: 0 4px 16px rgba(255,143,171,0.28);
}
.header-inner {
  display: flex; align-items: center; justify-content: center; gap: 12px;
}
.header-pome {
  width: 52px; height: 52px;
  flex-shrink: 0;
}
.header-title {
  font-size: 1.55rem; font-weight: 900;
  color: var(--color-white); letter-spacing: 0.04em;
  text-shadow: 0 2px 8px rgba(0,0,0,0.15);
  line-height: 1.25;
}
.header-sub { margin-top: 4px; font-size: 0.82rem; color: rgba(255,255,255,0.88); }

/* ============================================================
   ポメせんせい アイコン・マスコット共通スタイル  v7.0
   ============================================================ */

/*
 * .pome-icon  … スタート画面や各所のポメ先生アイコン
 *               ステッカー風（白い枠線・角丸・影）
 * .pome-float … 上下にゆっくり浮かぶアニメーション
 * .pome-mascot… 空状態（empty-state）に表示するマスコット
 */

/* ── ステッカー風アイコン装飾 ── */
.pome-icon {
  display: block;
  border: 3px solid white;
  border-radius: 20px;
  box-shadow:
    0 4px 16px rgba(255, 143, 171, 0.40),
    0 2px  6px rgba(0, 0, 0, 0.12);
  object-fit: cover;
  background: white;
}

/* ── 浮遊アニメーション ── */
@keyframes pome-float {
  0%,  100% { transform: translateY(0px)    rotate(-1deg); }
  25%        { transform: translateY(-10px)  rotate( 1deg); }
  75%        { transform: translateY(-6px)   rotate(-2deg); }
}

.pome-float {
  animation: pome-float 3.6s ease-in-out infinite;
}

/* ── スタート画面のポメ先生サイズ ── */
.flash-start-emoji .pome-icon,
.quiz-start-emoji  .pome-icon {
  width: 90px;
  height: 90px;
  border-radius: 24px;
  border-width: 4px;
}

/* ── empty-state マスコット ── */
.pome-mascot {
  display: block;
  width: 72px;
  height: 72px;
  margin: 0 auto 8px;
  border: 3px solid white;
  border-radius: 18px;
  box-shadow: 0 4px 14px rgba(255, 143, 171, 0.35);
  object-fit: cover;
  opacity: 0.6;
  background: white;
}

/* ============================================================
   モード選択ナビ  ★ NEW
   ============================================================ */
.mode-nav {
  display: flex;
  gap: 0;
  padding: 16px 16px 0;
  justify-content: center;
  max-width: 760px;
  margin: 0 auto;
}

.mode-btn {
  flex: 1;
  max-width: 180px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 8px;
  border: 2px solid #e8e0f0;
  border-right-width: 0;
  background: var(--color-white);
  font-family: var(--font-main);
  cursor: pointer;
  transition: var(--ease);
  box-shadow: var(--shadow-sm);
}

.mode-btn:first-child { border-radius: var(--radius-sm) 0 0 var(--radius-sm); }
.mode-btn:last-child  { border-radius: 0 var(--radius-sm) var(--radius-sm) 0; border-right-width: 2px; }

.mode-btn:hover { background: var(--color-pink-bg); }

.mode-btn.active {
  background: linear-gradient(135deg, var(--color-pink-bg), #f3ecff);
  border-color: var(--color-pink);
  border-right-width: 2px;
  z-index: 1;
  position: relative;
}
/* 隣接する active の右側にborderを引き直す */
.mode-btn.active + .mode-btn { border-left-width: 0; }

.mode-icon  { font-size: 1.4rem; }
.mode-label {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-text-lt);
  white-space: nowrap;
}
.mode-btn.active .mode-label { color: var(--color-pink); }

/* ============================================================
   学年タブ
   ============================================================ */
.grade-nav {
  display: flex;
  gap: 10px;
  padding: 14px 16px 0;
  justify-content: center;
  flex-wrap: wrap;
}

.grade-btn {
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  padding: 10px 18px;
  border: 3px solid transparent;
  border-radius: var(--radius-md);
  background: var(--color-white);
  font-family: var(--font-main);
  cursor: pointer;
  transition: var(--spring);
  box-shadow: var(--shadow-card);
  min-width: 88px;
}
.grade-btn:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0,0,0,0.12); }
.grade-emoji { font-size: 1.4rem; }
.grade-label { font-size: 0.95rem; font-weight: 700; color: var(--color-text-lt); }
.grade-count { font-size: 0.7rem; font-weight: 600; color: var(--color-text-lt); opacity: 0.75; }
.grade-btn.active { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0,0,0,0.12); }
.grade-btn.active[data-grade="1"] { background: var(--grade1-bg); border-color: var(--grade1-color); }
.grade-btn.active[data-grade="1"] .grade-label { color: var(--grade1-color); }
.grade-btn.active[data-grade="2"] { background: var(--grade2-bg); border-color: var(--grade2-color); }
.grade-btn.active[data-grade="2"] .grade-label { color: #b78700; }
.grade-btn.active[data-grade="3"] { background: var(--grade3-bg); border-color: var(--grade3-color); }
.grade-btn.active[data-grade="3"] .grade-label { color: #3a9c7e; }

/* ============================================================
   ツールバー（いちらんモード）
   ============================================================ */
.toolbar {
  display: flex; gap: 10px;
  padding: 14px 16px 0;
  max-width: 760px; margin: 0 auto;
  align-items: center; flex-wrap: wrap;
}
.search-wrap {
  display: flex; align-items: center; flex: 1; min-width: 180px;
  background: var(--color-white);
  border: 2px solid #e8e0f0;
  border-radius: 99px;
  padding: 0 12px 0 10px; gap: 6px;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.2s;
}
.search-wrap:focus-within { border-color: var(--color-pink); }
.search-icon { font-size: 1rem; flex-shrink: 0; }
.search-input {
  flex: 1; border: none; outline: none; background: transparent;
  font-family: var(--font-main); font-size: 0.95rem; color: var(--color-text);
  padding: 10px 0;
}
.search-input::placeholder { color: var(--color-text-lt); }
.search-clear {
  flex-shrink: 0; width: 22px; height: 22px;
  border: none; border-radius: 50%; background: #e8e0f0;
  color: var(--color-text-lt); font-size: 0.75rem; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.2s;
}
.search-clear:hover { background: var(--color-pink-lt); }
.sort-wrap { display: flex; gap: 6px; flex-shrink: 0; }
.sort-btn {
  padding: 8px 14px;
  border: 2px solid #e8e0f0; border-radius: 99px;
  background: var(--color-white);
  font-family: var(--font-main); font-size: 0.8rem; font-weight: 700;
  color: var(--color-text-lt); cursor: pointer;
  box-shadow: var(--shadow-sm); transition: var(--ease); white-space: nowrap;
}
.sort-btn:hover { border-color: var(--color-pink-lt); }
.sort-btn.active { background: var(--color-pink-bg); border-color: var(--color-pink); color: var(--color-pink); }

/* ============================================================
   進捗バー
   ============================================================ */
.progress-section {
  padding: 12px 16px 0;
  max-width: 760px; margin: 0 auto;
}
.progress-label {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.86rem; font-weight: 700; color: var(--color-text-lt); margin-bottom: 6px;
}
#progress-text { color: var(--color-pink); }
.progress-bar-track { height: 12px; background: #ece6f0; border-radius: 99px; overflow: hidden; }
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-pink), var(--color-purple-lt));
  border-radius: 99px; width: 0%; transition: width 0.6s ease;
}

/* ============================================================
   漢字グリッド
   ============================================================ */
.kanji-grid-section { padding: 14px 16px; max-width: 760px; margin: 0 auto; }
.kanji-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(108px, 1fr));
  gap: 12px;
}
.kanji-card {
  position: relative; background: var(--color-white);
  border-radius: var(--radius-md); box-shadow: var(--shadow-card);
  padding: 16px 10px 12px;
  display: flex; flex-direction: column; align-items: center; gap: 5px;
  cursor: pointer; transition: var(--spring);
  border: 3px solid transparent;
  user-select: none; -webkit-tap-highlight-color: transparent;
}
.kanji-card:hover, .kanji-card:focus-visible {
  transform: translateY(-6px) scale(1.04);
  box-shadow: 0 12px 32px rgba(0,0,0,0.14);
}
.kanji-card:active { transform: scale(0.96); }
.kanji-card[data-grade="1"] { border-color: var(--color-pink-lt); }
.kanji-card[data-grade="2"] { border-color: var(--color-yellow-lt); }
.kanji-card[data-grade="3"] { border-color: var(--color-green-lt); }
.kanji-card.memorized { background: linear-gradient(135deg, #fffde7, #fff8c1); }
.kanji-card.memorized::after {
  content: '⭐'; position: absolute; top: 5px; right: 7px; font-size: 0.82rem;
}
.kanji-char { font-family: var(--font-kanji); font-size: 2.8rem; line-height: 1.1; }
.kanji-reading { font-size: 0.73rem; color: var(--color-text-lt); text-align: center; }
.kanji-stroke-badge { font-size: 0.68rem; background: #f0edf8; border-radius: 99px; padding: 2px 8px; color: var(--color-text-lt); }
.empty-state { grid-column: 1 / -1; text-align: center; padding: 48px 20px; color: var(--color-text-lt); }
.empty-state .empty-emoji { font-size: 3rem; display: block; margin-bottom: 12px; }

/* ============================================================
   モーダル
   ============================================================ */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(50,30,70,0.46);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000; padding: 20px;
  opacity: 0; pointer-events: none; transition: opacity 0.25s ease;
}
.modal-overlay.open { opacity: 1; pointer-events: all; }
.modal-card {
  position: relative; background: var(--color-white);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-modal);
  width: 100%; max-width: 400px; padding: 28px 22px 22px;
  transform: scale(0.84) translateY(24px);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  max-height: 92dvh; overflow-y: auto; overscroll-behavior: contain;
}
.modal-overlay.open .modal-card { transform: scale(1) translateY(0); }
.modal-close {
  position: absolute; top: 14px; right: 14px;
  width: 36px; height: 36px; border: none; border-radius: 50%;
  background: #f0edf8; color: var(--color-text-lt); font-size: 1rem;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: background 0.2s;
}
.modal-close:hover { background: var(--color-pink-lt); color: var(--color-pink); }
.modal-kanji-wrap { text-align: center; margin-bottom: 16px; display: flex; flex-direction: column; align-items: center; gap: 6px; }
.modal-kanji { font-family: var(--font-kanji); font-size: 6rem; line-height: 1; }
.modal-strokes-badge { background: #f0edf8; color: var(--color-blue); font-size: 0.82rem; font-weight: 700; border-radius: 99px; padding: 3px 12px; }
.modal-body { display: flex; flex-direction: column; gap: 10px; }
.modal-row { display: flex; gap: 10px; }
.modal-cell { flex: 1; background: var(--color-bg); border-radius: var(--radius-sm); padding: 10px 12px; }
.modal-section { background: var(--color-bg); border-radius: var(--radius-sm); padding: 10px 14px; }
.modal-label { font-size: 0.68rem; font-weight: 800; color: var(--color-text-lt); letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 5px; }
.modal-reading { font-size: 1.25rem; font-weight: 700; color: var(--color-pink); line-height: 1.4; }
.modal-meaning { font-size: 1.05rem; font-weight: 600; color: var(--color-text); line-height: 1.5; }
.modal-examples { list-style: none; display: flex; flex-direction: column; gap: 8px; margin-top: 2px; }
.modal-examples li {
  font-size: 1.08rem; line-height: 1.65; color: var(--color-text);
  padding: 8px 12px 8px 28px;
  background: var(--color-white); border-radius: var(--radius-sm);
  position: relative; border-left: 3px solid var(--color-green-lt);
  word-break: break-all;
}
.modal-examples li::before { content: '📖'; position: absolute; left: 6px; top: 8px; font-size: 0.9rem; }
.memorized-btn {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%; margin-top: 18px; padding: 14px; border: none;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-yellow), var(--color-yellow-lt));
  color: #7a5500; font-family: var(--font-main); font-size: 1.15rem; font-weight: 900;
  cursor: pointer; box-shadow: 0 4px 14px rgba(255,209,102,0.45);
  transition: var(--spring); letter-spacing: 0.06em;
}
.memorized-btn:hover { transform: scale(1.04); }
.memorized-btn:active { transform: scale(0.96); }
.memorized-btn.done {
  background: linear-gradient(135deg, #a8ddc9, #c5f0e0);
  color: #2d6b55; box-shadow: 0 4px 14px rgba(112,193,163,0.40);
}
.memorized-icon { font-size: 1.3rem; }

/* ============================================================
   フラッシュカード スタート画面  v6.1
   ============================================================ */
#flash-screen-start {
  max-width: 480px;
  margin: 0 auto;
  padding: 24px 16px 40px;
}
.flash-start-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 36px 28px 32px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  animation: fadeUp 0.4s ease both;
}
.flash-start-emoji {
  font-size: 4.5rem;
  line-height: 1;
  animation: bounce 2s ease-in-out infinite;
}
.flash-start-title {
  font-size: 1.85rem;
  font-weight: 900;
  color: var(--color-pink);
  letter-spacing: 0.04em;
}
.flash-start-desc {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.8;
}
.flash-start-desc span { color: var(--color-pink); }
.flash-start-info {
  background: var(--color-yellow-bg);
  border: 2px solid var(--color-yellow-lt);
  border-radius: var(--radius-sm);
  padding: 12px 20px;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--color-text-lt);
  line-height: 1.7;
  width: 100%;
}
.flash-start-btn {
  margin-top: 4px;
  width: 100%;
  padding: 18px 0;
  border: none;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-pink) 0%, #c9b3e8 100%);
  color: var(--color-white);
  font-family: var(--font-main);
  font-size: 1.3rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  cursor: pointer;
  box-shadow: 0 6px 22px rgba(255, 143, 171, 0.48);
  transition: var(--spring);
}
.flash-start-btn:hover  { transform: scale(1.04); box-shadow: 0 10px 30px rgba(255,143,171,0.55); }
.flash-start-btn:active { transform: scale(0.96); }

/* ============================================================
   フラッシュカードモード  v2（ふわっと表示）
   ============================================================ */
#view-flash {
  position: relative;
  max-width: 480px;
  margin: 0 auto;
  padding: 16px 16px 32px;
}

/* ── ヘッダー行 ── */
.flash-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}
.flash-progress-wrap { display: flex; align-items: baseline; gap: 5px; }
.flash-progress-label { font-size: 0.78rem; font-weight: 700; color: var(--color-text-lt); }
.flash-progress-count { font-size: 1.5rem; font-weight: 900; color: var(--color-pink); }
.flash-shuffle-btn {
  padding: 8px 16px;
  border: 2px solid #e8e0f0; border-radius: 99px;
  background: var(--color-white); font-family: var(--font-main);
  font-size: 0.82rem; font-weight: 700; color: var(--color-text-lt);
  cursor: pointer; box-shadow: var(--shadow-sm); transition: var(--ease);
}
.flash-shuffle-btn:hover { border-color: var(--color-pink); color: var(--color-pink); }

/* ── カード本体 ── */
.flash-card-box {
  width: 100%;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  /* クリック可能であることを示す影＋カーソル */
  box-shadow: 0 6px 24px rgba(0,0,0,0.13), 0 2px 8px rgba(0,0,0,0.07);
  border: 4px solid var(--color-pink-lt);   /* JS でグレード別に上書き */
  overflow: hidden;
  margin-bottom: 16px;
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: border-color 0.3s ease, box-shadow 0.25s ease, transform 0.2s ease;
}
.flash-card-box:hover {
  box-shadow: 0 12px 36px rgba(0,0,0,0.16), 0 4px 12px rgba(0,0,0,0.09);
  transform: translateY(-3px);
}
.flash-card-box:active {
  transform: scale(0.983);
  box-shadow: 0 3px 12px rgba(0,0,0,0.10);
}
/* 答え表示中は緑のボーダーで「表示状態」を明示 */
.flash-card-box.answer-shown {
  border-color: var(--color-green-lt) !important;
  box-shadow: 0 6px 24px rgba(112,193,163,0.22), 0 2px 8px rgba(0,0,0,0.07);
}

/* ── 問題エリア（漢字のみ・常に表示）── */
.flash-q-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 36px 24px 28px;
}
.flash-kanji {
  font-family: var(--font-kanji);
  font-size: 7.5rem;
  line-height: 1;
  color: var(--color-text);
}
.flash-stroke-badge {
  background: #f0edf8; color: var(--color-blue);
  font-size: 0.84rem; font-weight: 700; border-radius: 99px; padding: 4px 16px;
}

/* ── 答えエリア（ふわっと表示）── */
.flash-answer-area {
  padding: 0 24px 28px;
  /* 初期状態：非表示 */
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  /* ふわっとアニメーション */
  transition:
    opacity  0.45s ease,
    transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}
.flash-answer-area.revealed {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* 区切り線 */
.flash-answer-divider {
  height: 2px;
  background: linear-gradient(90deg, transparent, #e8e0f0 20%, #e8e0f0 80%, transparent);
  border-radius: 99px;
  margin-bottom: 20px;
}

.flash-answer-reading {
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--color-pink);
  text-align: center;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}
.flash-answer-meaning {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-lt);
  text-align: center;
  margin-bottom: 14px;
}
.flash-answer-examples {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.flash-answer-examples li {
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: 9px 14px 9px 34px;
  position: relative;
  border-left: 3px solid var(--color-green-lt);
  word-break: break-all;
}
.flash-answer-examples li::before {
  content: '📖';
  position: absolute;
  left: 8px;
  top: 9px;
  font-size: 0.9rem;
}

/* 答えエリアの各要素に少しずつ遅延をつけてよりふわっと見せる */
.flash-answer-area.revealed .flash-answer-divider  { transition-delay: 0s; }
.flash-answer-area.revealed .flash-answer-reading  { transition-delay: 0.04s; }
.flash-answer-area.revealed .flash-answer-meaning  { transition-delay: 0.08s; }
.flash-answer-area.revealed .flash-answer-examples { transition-delay: 0.12s; }

/* ── こたえを見るボタン ── */
.flash-reveal-wrap {
  margin-bottom: 14px;
  text-align: center;
}
.flash-reveal-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 40px;
  border: none;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-pink) 0%, #c9b3e8 100%);
  color: var(--color-white);
  font-family: var(--font-main);
  font-size: 1.2rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  cursor: pointer;
  box-shadow: 0 6px 20px rgba(255, 143, 171, 0.45);
  transition: var(--spring);
}
.flash-reveal-btn:hover  { transform: scale(1.05); box-shadow: 0 10px 28px rgba(255,143,171,0.55); }
.flash-reveal-btn:active { transform: scale(0.96); }

/* 「隠す」ボタン状態（答え表示中） */
.answer-shown ~ .flash-reveal-wrap .flash-reveal-btn {
  background: linear-gradient(135deg, var(--color-green-lt) 0%, #a8ddc9 100%);
  box-shadow: 0 6px 20px rgba(112,193,163,0.40);
  color: #2d6b55;
}

/* ── アクションボタン（答え表示後）── */
.flash-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  /* ふわっと登場 */
  animation: fadeUp 0.35s ease both;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}
.flash-action-btn {
  flex: 1;
  display: flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 10px;
  border: none; border-radius: var(--radius-md);
  font-family: var(--font-main); font-size: 1rem; font-weight: 900;
  cursor: pointer; transition: var(--spring);
}
.flash-action-btn:hover  { transform: scale(1.04); }
.flash-action-btn:active { transform: scale(0.96); }
.flash-action-retry {
  background: linear-gradient(135deg, #ffe4e1, #ffc2d4);
  color: #c0392b;
  box-shadow: 0 4px 14px rgba(255,100,100,0.22);
}
.flash-action-ok {
  background: linear-gradient(135deg, var(--color-yellow), var(--color-yellow-lt));
  color: #7a5500;
  box-shadow: 0 4px 14px rgba(255,209,102,0.40);
}

/* ── ナビゲーション ── */
.flash-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.flash-nav-btn {
  padding: 10px 18px;
  border: 2px solid #e8e0f0; border-radius: 99px;
  background: var(--color-white); font-family: var(--font-main);
  font-size: 0.85rem; font-weight: 700; color: var(--color-text-lt);
  cursor: pointer; box-shadow: var(--shadow-sm); transition: var(--ease);
  white-space: nowrap;
}
.flash-nav-btn:hover     { border-color: var(--color-pink-lt); color: var(--color-pink); }
.flash-nav-btn:disabled  { opacity: 0.35; pointer-events: none; }
.flash-index-display {
  font-size: 0.92rem; font-weight: 700; color: var(--color-text-lt); white-space: nowrap;
}
.flash-index-sep { margin: 0 4px; }

/* ── 完了画面 ── */
.flash-complete {
  position: absolute;
  inset: 0;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  padding: 24px;
  border-radius: var(--radius-lg);
  animation: fadeUp 0.4s ease both;
}
.flash-complete-inner {
  text-align: center;
  display: flex; flex-direction: column; align-items: center; gap: 14px;
}
.flash-complete-emoji  { font-size: 4rem; animation: bounce 1s ease-in-out infinite; }
.flash-complete-title  { font-size: 1.9rem; font-weight: 900; color: var(--color-pink); }
.flash-complete-sub    { font-size: 1rem; color: var(--color-text-lt); }
.flash-complete-stats {
  font-size: 1.3rem; font-weight: 900; color: var(--color-yellow);
  background: var(--color-yellow-bg); border-radius: var(--radius-md);
  padding: 10px 28px; border: 2px solid var(--color-yellow-lt);
}
.flash-restart-btn {
  margin-top: 4px;
  padding: 14px 32px;
  border: none; border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-pink), var(--color-purple-lt));
  color: var(--color-white); font-family: var(--font-main);
  font-size: 1.1rem; font-weight: 900; cursor: pointer;
  box-shadow: 0 4px 18px rgba(255,143,171,0.40); transition: var(--spring);
}
.flash-restart-btn:hover { transform: scale(1.05); }

/* ── レスポンシブ追加 ── */
@media (max-width: 480px) {
  .flash-kanji { font-size: 6rem; }
  .flash-q-area { padding: 28px 16px 20px; }
  .flash-answer-area { padding: 0 16px 20px; }
  .flash-reveal-btn { padding: 14px 28px; font-size: 1.1rem; }
  .flash-answer-reading { font-size: 1.5rem; }
  .flash-answer-examples li { font-size: 0.97rem; }
}

/* ============================================================
   クイズモード  v3
   ============================================================ */
#view-quiz {
  max-width: 480px;
  margin: 0 auto;
  padding: 16px 16px 32px;
  position: relative;
}

/* ── アニメーション共通 ── */
@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-12px); }
}
@keyframes stampPop {
  from { transform: scale(0) rotate(-15deg); opacity: 0; }
  to   { transform: scale(1) rotate(0deg);  opacity: 1; }
}
@keyframes fallDown {
  0%   { top: -80px; opacity: 1; transform: rotate(0deg) scale(1); }
  80%  { opacity: 1; }
  100% { top: 110vh; opacity: 0; transform: rotate(720deg) scale(0.5); }
}

/* ── スタンプ帳 ── */
.stamp-wrap {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 16px;
  margin-bottom: 20px;
  border: 2px solid #e8e0f0;
}
.stamp-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}
.stamp-card-title { font-size: 0.88rem; font-weight: 900; color: var(--color-text); }
.stamp-card-sub   { font-size: 0.78rem; font-weight: 700; color: var(--color-text-lt); }
.stamp-grid {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 4px;
}
.stamp-slot {
  aspect-ratio: 1;
  border-radius: 6px;
  border: 2px dashed #e8e0f0;
  background: var(--color-bg);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
}
.stamp-slot.filled {
  border: 2px solid var(--color-yellow-lt);
  background: var(--color-yellow-bg);
  animation: stampPop 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}
.stamp-slot.filled-perfect {
  border: 2px solid var(--color-pink-lt);
  background: var(--color-pink-bg);
  animation: stampPop 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

/* ── ① スタート画面 ── */
.quiz-start-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-modal);
  padding: 36px 24px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}
.quiz-start-emoji { font-size: 4rem; animation: bounce 1.4s ease-in-out infinite; }
.quiz-start-title { font-size: 2rem; font-weight: 900; color: var(--color-text); }
.quiz-start-desc  { font-size: 1.05rem; color: var(--color-text-lt); line-height: 1.9; }
.quiz-start-info  {
  background: var(--color-yellow-bg);
  border: 2px solid var(--color-yellow-lt);
  border-radius: var(--radius-md);
  padding: 12px 20px;
  font-size: 0.95rem;
  color: #7a5500;
  font-weight: 700;
  line-height: 1.8;
  text-align: center;
}
.quiz-start-btn {
  padding: 16px 44px;
  border: none;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-pink) 0%, #c9b3e8 100%);
  color: var(--color-white);
  font-family: var(--font-main);
  font-size: 1.3rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  cursor: pointer;
  box-shadow: 0 6px 24px rgba(255,143,171,0.45);
  transition: var(--spring);
}
.quiz-start-btn:hover  { transform: scale(1.05); box-shadow: 0 10px 30px rgba(255,143,171,0.55); }
.quiz-start-btn:active { transform: scale(0.96); }

/* ── ② 問題画面 ── */
.quiz-progress-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.quiz-pb-track {
  flex: 1;
  height: 10px;
  background: #ece6f0;
  border-radius: 99px;
  overflow: hidden;
}
.quiz-pb-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-pink), #c9b3e8);
  border-radius: 99px;
  width: 0%;
  transition: width 0.45s ease;
}
.quiz-progress-label {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-text-lt);
  white-space: nowrap;
}

.quiz-q-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-modal);
  padding: 24px 20px 20px;
  margin-bottom: 14px;
  border: 3px solid var(--color-pink-lt);
  text-align: center;
}
.quiz-q-label {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-lt);
  margin-bottom: 14px;
  line-height: 1.6;
}
.quiz-kanji-large {
  font-family: var(--font-kanji);
  font-size: 2.4rem;
  font-weight: 900;
  color: var(--color-pink);
  vertical-align: middle;
}
.quiz-sentence {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 2;
  word-break: break-all;
  min-height: 2.8rem;
}

/* ── 4択 ── */
.quiz-choices {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 14px;
}
.quiz-choice-btn {
  padding: 15px 8px;
  border: 3px solid #e8e0f0;
  border-radius: var(--radius-md);
  background: var(--color-white);
  font-family: var(--font-main);
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--color-text);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: var(--spring);
  min-height: 58px;
}
.quiz-choice-btn:hover:not(:disabled) { transform: scale(1.04); border-color: var(--color-pink-lt); background: var(--color-pink-bg); }
.quiz-choice-btn:active:not(:disabled) { transform: scale(0.96); }
.quiz-choice-btn:disabled { cursor: default; }
.quiz-choice-btn.correct {
  background: linear-gradient(135deg, #edfaf5, #a8ddc9);
  border-color: var(--color-green);
  color: #2d6b55;
  box-shadow: 0 4px 16px rgba(112,193,163,0.35);
  transform: scale(1.04);
}
.quiz-choice-btn.wrong {
  background: linear-gradient(135deg, #ffeae8, #ffb8b8);
  border-color: #ff6b6b;
  color: #c0392b;
}

/* ── フィードバック ── */
.quiz-feedback {
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 16px 20px;
  text-align: center;
  animation: fadeUp 0.35s ease both;
}
.quiz-feedback-badge {
  font-size: 1.5rem;
  font-weight: 900;
  margin-bottom: 8px;
  display: block;
}
.quiz-feedback-badge.correct { color: var(--color-green); }
.quiz-feedback-badge.wrong   { color: #ff6b6b; }
.quiz-feedback-detail {
  display: flex;
  justify-content: center;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.quiz-fb-reading {
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--color-pink);
}
.quiz-fb-meaning {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-text-lt);
}
.quiz-next-btn {
  padding: 11px 32px;
  border: none;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-pink), #c9b3e8);
  color: var(--color-white);
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 900;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(255,143,171,0.40);
  transition: var(--spring);
}
.quiz-next-btn:hover { transform: scale(1.05); }
.quiz-next-btn:active { transform: scale(0.96); }

/* ── ③ 結果画面 ── */
.quiz-result-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-modal);
  padding: 36px 24px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  animation: fadeUp 0.5s ease both;
}
.quiz-result-emoji { font-size: 4.5rem; animation: bounce 1.2s ease-in-out infinite; }
.quiz-result-score {
  font-size: 2rem;
  font-weight: 900;
  color: var(--color-text-lt);
}
.quiz-result-score span {
  font-size: 3.8rem;
  color: var(--color-pink);
}
.quiz-result-msg   { font-size: 1.05rem; font-weight: 700; color: var(--color-text-lt); }
.quiz-result-stars { font-size: 1.4rem; letter-spacing: 0.08em; line-height: 1.6; }
.quiz-stamp-notice {
  background: var(--color-yellow-bg);
  border: 2px solid var(--color-yellow-lt);
  border-radius: var(--radius-md);
  padding: 10px 20px;
  font-size: 1rem;
  font-weight: 900;
  color: #7a5500;
  animation: stampPop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) 0.3s both;
}
.quiz-retry-btn {
  padding: 14px 36px;
  border: none;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-pink), var(--color-purple-lt));
  color: var(--color-white);
  font-family: var(--font-main);
  font-size: 1.1rem;
  font-weight: 900;
  cursor: pointer;
  box-shadow: 0 4px 18px rgba(255,143,171,0.40);
  transition: var(--spring);
}
.quiz-retry-btn:hover  { transform: scale(1.05); }
.quiz-retry-btn:active { transform: scale(0.96); }

/* ── はなまるオーバーレイ ── */
.hanamaru-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 3000;
  overflow: hidden;
}
.hanamaru-item {
  position: absolute;
  top: -80px;
  animation: fallDown linear forwards;
  display: inline-block;
  will-change: transform, top;
}

/* ── クイズ レスポンシブ ── */
@media (max-width: 480px) {
  .quiz-start-card  { padding: 28px 16px; }
  .quiz-start-title { font-size: 1.7rem; }
  .quiz-start-btn   { font-size: 1.15rem; padding: 14px 32px; }
  .quiz-kanji-large { font-size: 2rem; }
  .quiz-sentence    { font-size: 1.1rem; }
  .quiz-choice-btn  { font-size: 1rem; min-height: 50px; }
  .quiz-result-score span { font-size: 3rem; }
  .stamp-grid { grid-template-columns: repeat(10, 1fr); gap: 3px; }
}

/* ============================================================
   トースト
   ============================================================ */
.toast {
  position: fixed; bottom: 28px; left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: #3a3a3a; color: #fff; border-radius: 99px;
  padding: 12px 26px; font-size: 0.95rem; font-weight: 700;
  z-index: 2000; opacity: 0; pointer-events: none;
  transition: opacity 0.3s, transform 0.3s;
  white-space: nowrap; max-width: calc(100vw - 32px);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ============================================================
   レスポンシブ  v7.1
   ============================================================ */
@media (max-width: 480px) {
  /* ── ヘッダー ── */
  .app-header {
    padding: 12px 10px 10px;   /* 左右パディングを狭めてタイトルの余裕を確保 */
  }
  .header-pome {
    width: 40px; height: 40px; /* スマホ時はアイコンを縮小 */
  }
  .header-inner { gap: 8px; }
  .header-title {
    font-size: 1.15rem;        /* 改行しない程度まで縮小 */
    letter-spacing: 0.01em;
    word-break: keep-all;      /* 単語の途中で改行しない */
    overflow-wrap: anywhere;   /* どうしても溢れる場合は折り返す */
  }
  .header-sub {
    font-size: 0.72rem;        /* サブタイトルも収める */
    word-break: keep-all;
    overflow-wrap: anywhere;
  }

  /* ── モード・学年ナビ ── */
  .mode-label { font-size: 0.72rem; }
  .mode-icon  { font-size: 1.2rem; }
  .grade-btn  { min-width: 76px; padding: 8px 10px; }
  .grade-emoji { font-size: 1.2rem; }
  .grade-label { font-size: 0.88rem; }

  /* ── いちらん ── */
  .toolbar { gap: 8px; }
  .sort-btn { padding: 7px 10px; font-size: 0.75rem; }
  .kanji-grid { grid-template-columns: repeat(auto-fill, minmax(86px, 1fr)); gap: 10px; }
  .kanji-char { font-size: 2.4rem; }
  .modal-kanji { font-size: 5rem; }
  .modal-examples li { font-size: 1rem; }
  .modal-row { flex-direction: column; }

  /* ── フラッシュカード ── */
  .flash-scene { height: 260px; }
  .flash-kanji { font-size: 6.5rem; }
}

@media (min-width: 600px) {
  .kanji-grid { grid-template-columns: repeat(auto-fill, minmax(116px, 1fr)); }
}

/* ============================================================
   アクセシビリティ
   ============================================================ */
:focus-visible { outline: 3px solid var(--color-pink); outline-offset: 3px; }
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--color-pink-lt); border-radius: 99px; }