/* ============================================================
 * styles.css — デザインB「ニュートラル・モダン × 1アクセント(青)」(Things/Oura的)
 *   薄いグレー地 × 白カード(枠線なし＋ソフト影) × 近黒インク × 青アクセント。
 *   ライト/ダーク両対応（prefers-color-scheme）。
 * ============================================================ */
:root {
  --paper: #fafafa;
  --paper-deep: #f1f1f3;
  --card: #ffffff;
  --ink: #18181b;
  --ink-700: #27272a;
  --ink-sub: #71717a;
  --ink-faint: #a1a1aa;
  --accent: #2a5bd7;       /* 1アクセント=青 */
  --accent-deep: #1e47b0;
  --green: #1f8a5b;
  --green-soft: #e3f3ec;
  --amber: #c7841f;
  --amber-soft: #f7eed9;
  --red: #d14343;
  --red-soft: #fae4e4;
  --review: #2a5bd7;       /* 復習バッジも青系に */
  --review-soft: #e6edfb;
  --line: #ececee;
  --line-strong: #dcdce0;
  --r-sm: 10px;
  --r-md: 12px;
  --r-lg: 16px;
  --shadow: 0 1px 2px rgba(0, 0, 0, .05), 0 6px 16px rgba(0, 0, 0, .04);
}

/* ダークモード（B: 黒地 × 濃グレーカード × 明るい青アクセント） */
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0b0b0c;
    --paper-deep: #1d1d20;
    --card: #161618;
    --ink: #f4f4f5;
    --ink-700: #e4e4e7;
    --ink-sub: #a1a1aa;
    --ink-faint: #71717a;
    --accent: #6e8bff;
    --accent-deep: #8aa0ff;
    --green: #5fc08d;
    --green-soft: #16321f;
    --amber: #e3b24e;
    --amber-soft: #332a16;
    --red: #e87a7a;
    --red-soft: #3a1f1f;
    --review: #6e8bff;
    --review-soft: #1a2030;
    --line: #2a2a2e;
    --line-strong: #3a3a40;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 6px 16px rgba(0, 0, 0, .3);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  -webkit-font-smoothing: antialiased;
  line-height: 1.7;
}

#app { max-width: 520px; margin: 0 auto; }
.screen { padding: 18px 16px calc(96px + env(safe-area-inset-bottom)); display: flex; flex-direction: column; gap: 14px; }

/* ---------- ヘッダー ---------- */
.top { padding: 6px 2px 2px; }
.brand { font-size: 21px; font-weight: 800; letter-spacing: .01em; display: flex; align-items: center; gap: 8px; }
.brand-mark { color: var(--accent); display: inline-flex; }
.brand-sub { font-size: 12.5px; color: var(--ink-sub); margin-top: 2px; }

/* ---------- カード ---------- */
.card { background: var(--card); border: none; border-radius: var(--r-lg); padding: 16px 16px; box-shadow: var(--shadow); }
.card-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 10px; }
.card-head h2 { font-size: 15px; font-weight: 800; margin: 0; color: var(--ink-700); }
.card-note { font-size: 11.5px; color: var(--ink-faint); }

/* ---------- ホーム hero ---------- */
.hero { display: flex; flex-direction: column; gap: 14px; }
.hero-row { display: flex; gap: 10px; }
.pill { flex: 1; text-align: center; border-radius: 999px; padding: 9px 0; font-size: 13.5px; font-weight: 700; border: 1px solid var(--line-strong); background: var(--paper); }
.pill b { font-size: 16px; }
.pill-review { color: var(--review); }
.pill-new { color: var(--green); background: var(--green-soft); border-color: var(--green-soft); }

.empty-note { font-size: 13.5px; color: var(--green); font-weight: 700; text-align: center; margin: 2px 0; line-height: 1.6; }

/* ホームの選択ブロック（出題形式 / 向き / レベル） */
.opt-block { display: flex; flex-direction: column; gap: 8px; }
.opt-label { font-size: 12px; font-weight: 800; color: var(--ink-700); margin: 0; letter-spacing: .02em; }
.opt-label small { font-size: 10.5px; font-weight: 600; color: var(--ink-sub); margin-left: 6px; }

/* レベルチップ（2×2・タップで「選択」。開始は下のボタン） */
.lv-chips { display: grid; grid-template-columns: repeat(2, 1fr); gap: 9px; }
.lv-chip { display: flex; flex-direction: column; align-items: stretch; gap: 2px; text-align: left; padding: 11px 12px; border-radius: var(--r-md); border: 1px solid var(--line-strong); background: var(--paper); cursor: pointer; font: inherit; transition: border-color .12s, background .12s, box-shadow .12s, transform .06s; }
.lv-chip:hover { border-color: var(--accent); }
.lv-chip:active { transform: scale(.985); }
.lv-chip-top { display: flex; align-items: center; justify-content: space-between; gap: 6px; }
.lv-chip-n { font-size: 14.5px; font-weight: 800; color: var(--accent-deep); }
.lv-chip-band { font-size: 11px; font-weight: 700; color: var(--ink-700); }
.lv-chip-lab { font-size: 10.5px; color: var(--ink-sub); }
/* 選択中: 太い枠＋淡色地で「これを学ぶ」を明示（現在=cur とは別物） */
.lv-chip.sel { background: var(--review-soft); border-color: var(--accent); box-shadow: inset 0 0 0 1.5px var(--accent); }
.lv-chip-sel { font-size: 9.5px; font-weight: 800; color: var(--accent-deep); background: var(--card); border: 1px solid var(--accent); border-radius: 999px; padding: 1px 7px; }
/* 「いま」バッジ(現在レベル): 枠は変えず情報表示のみ。淡色背景＋濃色文字で全テーマAA確保 */
.lv-chip-now { font-size: 9.5px; font-weight: 800; color: var(--accent-deep); background: var(--review-soft); border-radius: 999px; padding: 1px 7px; }
.lv-chip.locked { opacity: .9; }
.lv-chip.locked .lv-chip-n { color: var(--ink-sub); }
.lv-chip-lock { font-size: 12px; }
/* 全習得レベル: 緑系の状態表示（押せない＝div） */
.lv-chip.done { border-color: var(--green-soft); background: var(--green-soft); cursor: default; }
.lv-chip.done:hover { border-color: var(--green-soft); }
.lv-chip.done .lv-chip-n { color: var(--green); }
.lv-chip-done { font-size: 9.5px; font-weight: 800; color: var(--green); white-space: nowrap; }

/* 出題形式トグル（4択 / 上級） */
.mode-toggle { display: flex; gap: 0; background: var(--paper-deep); border-radius: 999px; padding: 3px; }
.mode-opt { flex: 1; font: inherit; font-size: 13px; font-weight: 700; color: var(--ink-sub); background: transparent; border: none; border-radius: 999px; padding: 8px 0; cursor: pointer; transition: background .12s, color .12s; }
.mode-opt.on { background: var(--card); color: var(--accent-deep); box-shadow: 0 1px 3px rgba(60,50,20,.12); }
.mode-desc { font-size: 11.5px; color: var(--ink-sub); text-align: center; margin: -4px 0 0; line-height: 1.6; }
.ground-note { font-size: 12px; color: var(--ink-sub); display: flex; align-items: flex-start; gap: 6px; padding: 0 4px; }
.ground-note svg { color: var(--accent); flex: none; margin-top: 3px; }
.ground-note .ln { font: inherit; background: none; border: none; padding: 0; color: var(--accent-deep); font-weight: 700; cursor: pointer; text-decoration: underline; text-underline-offset: 2px; }

/* ---------- 説明キャプション ---------- */
.lv-legend { font-size: 11.5px; color: var(--ink-sub); margin: -2px 0 8px; }
.lv-legend b { color: var(--ink-700); }

/* ---------- 復習スケジュール（7日棒グラフ） ---------- */
.sched-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 4px; padding: 4px 0 2px; }
.sched-day { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 3px; }
.sched-barwrap { height: 46px; display: flex; align-items: flex-end; }
.sched-bar { width: 22px; min-height: 4px; border-radius: 5px 5px 0 0; background: var(--paper-deep); }
.sched-day.today .sched-bar { background: linear-gradient(180deg, var(--accent), var(--accent-deep)); }
.sched-n { font-size: 13px; font-weight: 800; color: var(--ink-700); }
.sched-day.today .sched-n { color: var(--accent-deep); }
.sched-lbl { font-size: 10.5px; color: var(--ink-sub); }
.sched-day.today .sched-lbl { color: var(--accent-deep); font-weight: 700; }
.sched-note { font-size: 12.5px; color: var(--ink-sub); margin: 10px 0 0; }
.sched-note b { color: var(--accent-deep); }

/* ---------- プレミアム（フリーミアム） ---------- */
.lock-badge { font-size: 10px; font-weight: 700; color: var(--accent-deep); background: var(--review-soft); padding: 2px 7px; border-radius: 999px; margin-left: 6px; vertical-align: middle; }
.lvrow.locked .lvrow-name { color: var(--ink-sub); }
.lvrow.locked .bar-fill { background: var(--line-strong); }
.prem-card { background: var(--card); box-shadow: inset 0 0 0 1.5px var(--accent), var(--shadow); }
.prem-lead { font-size: 13.5px; color: var(--ink-700); margin: 0 0 12px; line-height: 1.8; }
.prem-lead b { color: var(--accent-deep); }
.prem-feats { list-style: none; margin: 0 0 14px; padding: 0; display: grid; gap: 8px; }
.prem-feats li { font-size: 13.5px; color: var(--ink); display: flex; align-items: center; gap: 8px; }
.prem-feats li svg { color: var(--green); flex: none; }
.prem-note { font-size: 11.5px; color: var(--ink-faint); margin: 10px 0 0; text-align: center; }

/* ---------- レベルバー ---------- */
.lvrow { padding: 8px 0; border-top: 1px solid var(--line); }
.lvrow:first-of-type { border-top: none; }
.lvrow-head { display: flex; justify-content: space-between; align-items: baseline; }
.lvrow-name { font-size: 13.5px; font-weight: 700; color: var(--ink-700); }
.lvrow-name small { font-size: 11px; font-weight: 500; color: var(--ink-faint); margin-left: 4px; }
.lvrow-val { font-size: 13px; font-weight: 800; color: var(--accent-deep); }
.lvrow-val small { font-weight: 600; color: var(--ink-sub); }
.lvrow-sub { font-size: 11px; color: var(--ink-faint); margin-top: 3px; }
.bar { height: 8px; background: var(--paper-deep); border-radius: 999px; overflow: hidden; margin-top: 6px; }
.bar.slim { height: 6px; }
.bar-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-deep)); border-radius: 999px; transition: width .3s ease; }

/* ---------- 学習: 進捗 ---------- */
.study-progress { display: flex; flex-direction: column; gap: 8px; padding: 2px 2px 0; }
.study-count { font-size: 13px; color: var(--ink-sub); }
.study-count b { font-size: 17px; color: var(--ink); margin-right: 2px; }

/* ---------- 学習: 問題カード ---------- */
.q-card { background: var(--card); border: none; border-radius: var(--r-lg); padding: 20px 18px 22px; box-shadow: var(--shadow); }
.q-badges { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; }
.badge { font-size: 11px; font-weight: 700; padding: 3px 9px; border-radius: 999px; display: inline-flex; align-items: center; gap: 3px; }
.badge-review { background: var(--review-soft); color: var(--review); }
.badge-new { background: var(--green-soft); color: var(--green); }
.badge-lv { background: var(--paper-deep); color: var(--ink-700); }
.badge-ox { background: var(--paper-deep); color: var(--ink-sub); }
.badge-danger { background: var(--red-soft); color: var(--red); }
.badge-master { background: var(--review-soft); color: var(--accent-deep); }
.badge-hard { background: var(--red-soft); color: var(--red); }

/* 上級モード: ○×自己採点 */
.selfgrade { text-align: center; }
.sg-cap { font-size: 14px; font-weight: 700; color: var(--ink-700); margin: 0 0 10px; }
.sg-row { display: flex; gap: 10px; }
.sg-btn { flex: 1; font: inherit; font-size: 15px; font-weight: 700; padding: 13px 0; border-radius: var(--r-md); cursor: pointer; border: 1.5px solid var(--line-strong); background: var(--paper); display: inline-flex; align-items: center; justify-content: center; gap: 6px; transition: background .12s, border-color .12s; }
.sg-btn.ok { color: var(--green); }
.sg-btn.ok:hover { background: var(--green-soft); border-color: var(--green); }
.sg-btn.ng { color: var(--red); }
.sg-btn.ng:hover { background: var(--red-soft); border-color: var(--red); }

/* 次回復習（単独表示） */
.nr-stand { display: flex; align-items: flex-start; gap: 6px; font-size: 12.5px; color: var(--ink-sub); background: var(--card); border: 1px solid var(--line); border-radius: var(--r-md); padding: 11px 14px; }
.nr-stand svg { flex: none; margin-top: 3px; }
.nr-stand b { color: var(--ink-700); }

.q-prompt { font-size: 13px; color: var(--ink-sub); margin: 0 0 6px; }
.word-big { font-size: 40px; font-weight: 800; letter-spacing: .005em; text-align: center; padding: 8px 0 18px; color: var(--ink); }
.word-big.sm { font-size: 30px; padding: 4px 0 8px; }
.picked-line { font-size: 13.5px; color: var(--ink-sub); text-align: center; margin-bottom: 4px; }
.picked-line b { color: var(--ink); }

.choices { display: grid; gap: 9px; }
.choice {
  width: 100%; text-align: left; font: inherit; font-size: 15px; font-weight: 500; color: var(--ink);
  background: var(--paper); border: 1px solid var(--line-strong); border-radius: var(--r-md);
  padding: 13px 16px; cursor: pointer; transition: background .12s, border-color .12s, transform .05s;
}
.choice:hover { background: var(--card); border-color: var(--accent); }
.choice:active { transform: scale(.99); }

/* ---------- 自信申告 ---------- */
.conf-block { margin-top: 16px; }
.conf-cap { text-align: center; font-size: 16px; font-weight: 800; color: var(--ink-700); margin: 0 0 12px; }
.conf-row { display: flex; gap: 10px; justify-content: center; }
.conf-chip {
  flex: 1; max-width: 130px; font: inherit; font-size: 15px; font-weight: 700; color: var(--ink-700);
  background: var(--paper); border: 1.5px solid var(--line-strong); border-radius: 999px; padding: 11px 0; cursor: pointer;
  transition: background .12s, border-color .12s, color .12s;
}
.conf-chip:hover { border-color: var(--accent); color: var(--accent-deep); background: var(--card); }
.conf-note { text-align: center; font-size: 11.5px; color: var(--ink-faint); margin: 12px 0 0; }

/* ---------- 結果 ---------- */
.result-banner { display: flex; align-items: center; gap: 12px; padding: 13px 16px; border-radius: var(--r-md); }
.result-banner.is-correct { background: var(--green-soft); }
.result-banner.is-wrong { background: var(--red-soft); }
.rb-ic { display: inline-flex; flex: none; }
.is-correct .rb-ic { color: var(--green); }
.is-wrong .rb-ic { color: var(--red); }
.rb-body { flex: 1; }
.rb-word { font-size: 16px; font-weight: 800; margin: 0; }
.is-correct .rb-word { color: var(--green); }
.is-wrong .rb-word { color: var(--red); }
.rb-detail { font-size: 13px; color: var(--ink-700); margin: 1px 0 0; }
.rb-tag { flex: none; }

.ans-card { display: flex; flex-direction: column; gap: 6px; }
.ans-word { font-size: 22px; font-weight: 800; }
.ans-pos { font-size: 12px; font-weight: 600; color: var(--ink-faint); margin-left: 6px; }
.ans-mean { font-size: 17px; font-weight: 700; color: var(--accent-deep); }
.ans-ex { margin-top: 6px; padding: 10px 14px; background: var(--paper); border-radius: var(--r-sm); border-left: 3px solid var(--accent); }
.ex-en { font-size: 14.5px; margin: 0; color: var(--ink); }
.ex-ja { font-size: 12.5px; margin: 3px 0 0; color: var(--ink-sub); }
.next-review { display: flex; align-items: flex-start; gap: 6px; font-size: 12.5px; color: var(--ink-sub); margin-top: 8px; }
.next-review svg { flex: none; margin-top: 3px; color: var(--ink-500, var(--ink-sub)); }
.next-review b { color: var(--ink-700); }

/* ---------- 完了 ---------- */
.done-card { text-align: center; display: flex; flex-direction: column; gap: 8px; align-items: center; padding: 28px 18px; }
.done-stamp { width: 56px; height: 56px; border-radius: 999px; background: var(--green-soft); color: var(--green); display: flex; align-items: center; justify-content: center; }
.done-card h2 { margin: 4px 0 0; font-size: 19px; }
.done-msg { font-size: 13px; color: var(--ink-sub); margin: 0; }
.done-actions { display: flex; gap: 10px; margin-top: 10px; flex-wrap: wrap; justify-content: center; }

/* ---------- マイページ ---------- */
.stat-hero { display: flex; flex-direction: column; gap: 12px; }
.stat-big { text-align: center; }
.stat-num { font-size: 40px; font-weight: 800; color: var(--accent-deep); line-height: 1.1; }
.stat-num small { font-size: 18px; color: var(--ink-faint); font-weight: 700; }
.stat-lab { font-size: 13px; color: var(--ink-sub); margin-top: 2px; }
.stat-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; }
.stat-cell { background: var(--paper); border-radius: var(--r-sm); padding: 9px 4px; text-align: center; }
.stat-cell.warn { background: var(--red-soft); }
.sc-num { font-size: 18px; font-weight: 800; color: var(--ink-700); }
.sc-num small { font-size: 11px; font-weight: 600; }
.stat-cell.warn .sc-num { color: var(--red); }
.sc-lab { font-size: 10px; color: var(--ink-sub); margin-top: 1px; line-height: 1.3; }

.setrow { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.setrow label { font-size: 14px; color: var(--ink-700); }
.setrow select { font: inherit; font-size: 14px; padding: 8px 10px; border-radius: var(--r-sm); border: 1px solid var(--line-strong); background: var(--paper); color: var(--ink); }
.set-note { font-size: 11.5px; color: var(--ink-sub); margin: 8px 0 0; line-height: 1.6; }

.data-note { font-size: 12.5px; color: var(--ink-sub); margin: 0 0 12px; line-height: 1.8; }
.data-note b { color: var(--ink-700); }
.data-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* ---------- ボタン ---------- */
.btn { font: inherit; font-weight: 700; border-radius: var(--r-md); padding: 12px 18px; cursor: pointer; border: 1px solid transparent; display: inline-flex; align-items: center; justify-content: center; gap: 7px; transition: filter .12s, background .12s, transform .05s; }
.btn:active { transform: scale(.99); }
.btn-lg { width: 100%; padding: 15px; font-size: 16px; }
.btn-sm { padding: 9px 13px; font-size: 13px; border-radius: var(--r-sm); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { filter: brightness(1.06); }
.btn-secondary { background: var(--card); color: var(--ink-700); border-color: var(--line-strong); }
.btn-secondary:hover { background: var(--card); border-color: var(--accent); }
.btn-ghost { background: transparent; color: var(--ink-sub); }
.btn-ghost:hover { color: var(--ink); }
.btn-ghost.danger, .btn .danger { color: var(--red); }
.danger { color: var(--red); }

/* ---------- タブバー ---------- */
.tabbar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 20;
  max-width: 520px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(3, 1fr);
  background: var(--card); backdrop-filter: blur(8px);
  border-top: 1px solid var(--line); padding-bottom: env(safe-area-inset-bottom);
}
.tab { background: none; border: none; font: inherit; cursor: pointer; color: var(--ink-faint); padding: 9px 0 8px; display: flex; flex-direction: column; align-items: center; gap: 3px; font-size: 11px; font-weight: 600; }
.tab .tab-ic { display: inline-flex; }
.tab.active { color: var(--accent-deep); }

/* ---------- 発音ボタン ---------- */
.spk { display: inline-flex; align-items: center; justify-content: center; vertical-align: middle; margin-left: 10px; width: 44px; height: 44px; border-radius: 999px; border: none; cursor: pointer; color: var(--accent); background: color-mix(in srgb, var(--accent) 14%, var(--card)); transition: filter .12s; }
.spk:hover { filter: brightness(.96); }
.word-big .spk svg { width: 22px; height: 22px; }
.ans-word .spk { width: 30px; height: 30px; margin-left: 8px; } .ans-word .spk svg { width: 16px; height: 16px; }

/* ---------- 学習: 戻る／連続バナー ---------- */
.sp-top { display: flex; align-items: center; justify-content: space-between; }
.back-btn { font: inherit; font-size: 12.5px; font-weight: 700; color: var(--accent); background: none; border: none; cursor: pointer; display: inline-flex; align-items: center; gap: 4px; padding: 2px 4px; }
.back-btn svg { width: 16px; height: 16px; }
.streak-banner { background: color-mix(in srgb, var(--accent) 12%, var(--card)); color: var(--accent-deep); font-weight: 700; font-size: 13.5px; border-radius: var(--r-md); padding: 11px 14px; }
.done-streak { color: var(--accent-deep); font-weight: 800; font-size: 15px; margin: 2px 0 0; }

/* ---------- 学習ヒートマップ ---------- */
.hm-labels { display: flex; gap: 3px; margin-bottom: 3px; }
.hm-mlabel { width: 13px; font-size: 9px; color: var(--ink-faint); flex: none; white-space: nowrap; overflow: visible; }
.hm-grid { display: flex; gap: 3px; }
.hm-col { display: flex; flex-direction: column; gap: 3px; }
.hm-cell { width: 13px; height: 13px; border-radius: 3px; background: var(--paper-deep); flex: none; padding: 0; border: none; cursor: pointer; }
.hm-cell.sel { outline: 2px solid var(--ink); outline-offset: -1px; }
.hm-detail { font-size: 12px; color: var(--ink-700); font-weight: 700; margin: 10px 0 6px; }
.hm-legend { display: flex; align-items: center; gap: 5px; font-size: 10px; color: var(--ink-faint); }
.hm-legend i { width: 11px; height: 11px; border-radius: 2px; display: inline-block; }
.hm-legend b { margin-left: auto; color: var(--accent-deep); font-size: 12px; }

/* ---------- テーマピッカー／スイッチ／ミニトグル ---------- */
.setrow-col { flex-direction: column; align-items: flex-start; gap: 8px; }
.setrow-col label small { font-weight: 600; color: var(--ink-sub); margin-left: 6px; }
.theme-grid { display: flex; flex-wrap: wrap; gap: 10px; }
.theme-sw { width: 42px; height: 42px; border-radius: 12px; border: 1px solid rgba(0,0,0,.1); cursor: pointer; display: flex; align-items: center; justify-content: center; padding: 0; }
.theme-sw.on { box-shadow: 0 0 0 3px var(--accent); }
.theme-dot { width: 18px; height: 18px; border-radius: 999px; display: block; }
.switch { width: 46px; height: 28px; border-radius: 999px; background: var(--line-strong); border: none; cursor: pointer; position: relative; padding: 0; transition: background .15s; flex: none; }
.switch.on { background: var(--accent); }
.switch-knob { position: absolute; top: 3px; left: 3px; width: 22px; height: 22px; border-radius: 999px; background: #fff; transition: left .15s; }
.switch.on .switch-knob { left: 21px; }
.time-input { font: inherit; font-size: 14px; padding: 6px 8px; border-radius: var(--r-sm); border: 1px solid var(--line-strong); background: var(--paper); color: var(--ink); }
.mini-toggle { display: flex; background: var(--paper-deep); border-radius: 999px; padding: 3px; }
.mini-toggle .mode-opt { padding: 6px 12px; font-size: 12.5px; flex: none; }

/* ---------- レベル行タップ ---------- */
.lvrow.tappable { cursor: pointer; }
.lvrow.tappable:hover .lvrow-name { color: var(--accent-deep); }
.lvrow-go { color: var(--accent); font-weight: 800; margin-left: 4px; }

/* ---------- 習得済み単語の一覧（復習に戻す） ---------- */
.mastered-list { display: flex; flex-direction: column; max-height: 320px; overflow-y: auto; margin: 2px -4px 0; }
.mrow { display: flex; align-items: center; gap: 10px; padding: 10px 4px; border-top: 1px solid var(--line); }
.mrow:first-child { border-top: none; }
.mrow-main { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 1px; }
.mrow-word { font-size: 15px; font-weight: 700; color: var(--ink); }
.mrow-mean { font-size: 12px; color: var(--ink-sub); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mrow .btn { flex: none; }