:root {
      --bg: #F5F0E8;
      --card: #ffffff;
      --card2:#D4CEC3;
      --blue: #1492CC;
      --blue-light: #D6EEF8;
      --blue-dark: #0E6E99;
      --navy: #463D3A;
      --text: #2C2420;
      --text-sub: #7A6E6A;
      --green: #10b981;
      --green-light: #d1fae5;
      --red: #E8604C;
      --red-light: #FDEAE7;
      --yellow: #f59e0b;
      --yellow-light: #fef9c3;
      --purple: #8b5cf6;
      --purple-light: #f5f3ff;
      --radius: 20px;
      --radius-sm: 12px;
      --shadow: 0 2px 12px rgba(20,146,204,0.10);
      --shadow-lg: 0 8px 32px rgba(20,146,204,0.18);
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: 'Noto Sans JP', sans-serif;
      background: var(--bg);
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 16px;
      background-image:
        radial-gradient(circle at 20% 20%, rgba(20,146,204,0.07) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(70,61,58,0.05) 0%, transparent 50%);
    }
    .container { width: 100%; max-width: 420px; }
    .card { background: var(--card); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); border: 1px solid rgba(20,146,204,0.08); margin-bottom: 12px; }
    .btn { width: 100%; padding: 16px; border-radius: var(--radius); border: none; font-family: 'Outfit', sans-serif; font-size: 1.05rem; font-weight: 700; cursor: pointer; transition: all 0.2s; margin-bottom: 8px; }
    .btn:active { transform: scale(0.97); }
    .btn-primary { background: var(--blue); color: white; box-shadow: 0 4px 16px rgba(20,146,204,0.35); }
    .btn-primary:hover { background: var(--blue-dark); }
    .btn-secondary { background: var(--card2); color: var(--navy); }
    .btn-green { background: var(--green); color: white; box-shadow: 0 4px 16px rgba(16,185,129,0.3); }
    .btn:disabled { opacity: 0.4; cursor: not-allowed; }
    .screen { display: none; }
    .screen.active { display: block; }
    .screen-title { font-family: 'Outfit', sans-serif; font-size: 1.3rem; font-weight: 800; color: var(--navy); margin-bottom: 16px; text-align: center; }
    .setting-label { font-size: 0.75rem; font-weight: 700; color: var(--text-sub); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 8px; }
    .input-text { width: 100%; border: 1.5px solid #e2e8f0; border-radius: 10px; padding: 10px 14px; font-size: 1rem; font-family: 'Noto Sans JP', sans-serif; outline: none; margin-bottom: 16px; transition: border 0.2s; }
    .input-text:focus { border-color: var(--blue); }

    /* トップ */
    .top-header { text-align: center; margin-bottom: 24px; padding-top: 8px; }
    .app-logo { font-family: 'Outfit', sans-serif; font-size: 3rem; font-weight: 900; color: var(--navy); line-height: 1; margin-bottom: 6px; letter-spacing: -0.02em; }
    .app-logo span { color: var(--blue); }
    .app-tagline { font-size: 0.95rem; color: var(--text-sub); }
    .top-crown { font-size: 3.2rem; display: block; margin-bottom: 8px; animation: float 3s ease-in-out infinite; }
    @keyframes float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }
    .notice-card { background: #fffbeb; border: 1.5px solid #fcd34d; border-radius: var(--radius-sm); padding: 10px 14px; margin-bottom: 16px; font-size: 0.8rem; color: #92400e; line-height: 1.6; }
    .top-sub-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 0; }
    .btn-outline { background: var(--card); border: 2px solid #e2e8f0; color: var(--navy); font-family: 'Outfit', sans-serif; font-size: 0.95rem; font-weight: 700; padding: 14px; border-radius: var(--radius); cursor: pointer; transition: all 0.2s; text-align: center; width: 100%; }
    .btn-outline:hover { border-color: var(--blue); color: var(--blue); background: var(--blue-light); }
    .btn-outline:active { transform: scale(0.97); }

    /* ═══ 新・トップ画面（ログイン前） ═══ */

    /* 背景浮遊アルファベット */
    #topBgCanvas {
      position: fixed; top: 0; left: 0;
      width: 100%; height: 100%;
      pointer-events: none; z-index: 0;
      opacity: 0.55;
    }

    /* ヒーローセクション */
    .top-hero {
      text-align: center;
      padding: 24px 0 8px;
      position: relative;
    }
    .top-hero-logo-wrap {
      position: relative;
      display: inline-block;
      margin-bottom: 6px;
    }
    .top-hero-logo {
      font-family: 'Outfit', sans-serif;
      font-size: 3.2rem; font-weight: 900;
      color: var(--navy); line-height: 1;
      letter-spacing: -0.02em;
      position: relative; z-index: 1;
    }
    .top-hero-logo .logo-king { color: var(--blue); }
    .top-hero-logo .logo-jr { font-size: 1.8rem; font-weight: 700; }
    /* 王冠 */
    .top-hero-crown {
      display: block; font-size: 2.8rem;
      margin-bottom: 4px;
      animation: float 3s ease-in-out infinite;
      position: relative; z-index: 1;
    }
    /* 王冠周りのキラキラ */
    .sparkle-wrap {
      position: absolute; top: 0; left: 50%;
      transform: translateX(-50%);
      width: 160px; height: 80px;
      pointer-events: none; z-index: 0;
    }
    .sparkle {
      position: absolute;
      width: 5px; height: 5px;
      border-radius: 50%;
      background: var(--blue);
      animation: sparkleAnim 2s ease-in-out infinite;
    }
    .sparkle:nth-child(1) { top:10px;left:10px;  animation-delay:0s;    background:#1492CC; width:4px;height:4px; }
    .sparkle:nth-child(2) { top:4px; left:50%;   animation-delay:0.4s;  background:#f59e0b; width:6px;height:6px; }
    .sparkle:nth-child(3) { top:14px;left:85%;   animation-delay:0.8s;  background:#1492CC; width:4px;height:4px; }
    .sparkle:nth-child(4) { top:30px;left:5%;    animation-delay:1.2s;  background:#f59e0b; width:3px;height:3px; }
    .sparkle:nth-child(5) { top:35px;left:95%;   animation-delay:0.2s;  background:#60a5fa; width:5px;height:5px; }
    .sparkle:nth-child(6) { top:55px;left:20%;   animation-delay:1.6s;  background:#f59e0b; width:4px;height:4px; }
    .sparkle:nth-child(7) { top:60px;left:75%;   animation-delay:0.6s;  background:#1492CC; width:3px;height:3px; }
    @keyframes sparkleAnim {
      0%,100% { opacity:0; transform:scale(0.5) translateY(0); }
      50% { opacity:1; transform:scale(1.2) translateY(-4px); }
    }
    .top-hero-catch {
      font-size: 1.05rem; font-weight: 700;
      color: var(--navy); line-height: 1.5;
      margin-bottom: 4px;
    }
    .top-hero-sub {
      font-size: 0.82rem; color: var(--text-sub);
      margin-bottom: 0;
    }

    /* メリットカード */
    .top-benefit-list {
      display: flex; flex-direction: column; gap: 8px;
      margin-bottom: 16px;
    }
    .top-benefit-card {
      background: var(--card);
      border: 1.5px solid #f1f5f9;
      border-radius: 16px;
      padding: 12px 14px;
      display: flex; align-items: center; gap: 12px;
      box-shadow: 0 1px 6px rgba(20,146,204,0.07);
      transition: border-color 0.18s, box-shadow 0.18s;
    }
    .top-benefit-card:hover {
      border-color: var(--blue);
      box-shadow: var(--shadow);
    }
    .top-benefit-icon-wrap {
      width: 44px; height: 44px;
      border-radius: 12px;
      display: flex; align-items: center; justify-content: center;
      flex-shrink: 0;
      font-size: 1.4rem;
    }
    .top-benefit-icon-wrap.blue  { background: var(--blue-light); }
    .top-benefit-icon-wrap.green { background: var(--green-light); }
    .top-benefit-icon-wrap.gold  { background: var(--yellow-light); }
    .top-benefit-info { flex: 1; }
    .top-benefit-title {
      font-family: 'Outfit', sans-serif;
      font-size: 0.9rem; font-weight: 800; color: var(--navy);
      margin-bottom: 2px;
    }
    .top-benefit-desc { font-size: 0.75rem; color: var(--text-sub); line-height: 1.5; }

    /* SVGアイコン */
    .benefit-svg { width: 28px; height: 28px; }

    /* ログインボタン群 */
    .top-login-section { margin-bottom: 12px; }
    .btn-google-new {
      width: 100%; padding: 16px;
      background: var(--blue);
      color: white;
      border: none; border-radius: var(--radius);
      font-family: 'Outfit', sans-serif;
      font-size: 1.05rem; font-weight: 700;
      cursor: pointer; margin-bottom: 8px;
      display: flex; align-items: center; justify-content: center; gap: 10px;
      box-shadow: 0 4px 16px rgba(20,146,204,0.38);
      transition: all 0.2s;
    }
    .btn-google-new:hover { background: var(--blue-dark); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(20,146,204,0.45); }
    .btn-google-new:active { transform: scale(0.97); }
    .btn-google-new img { width: 22px; height: 22px; background: white; border-radius: 50%; padding: 2px; }
    .btn-guest-new {
      width: 100%; padding: 14px;
      background: var(--card);
      color: var(--navy);
      border: 2px solid #e2e8f0;
      border-radius: var(--radius);
      font-family: 'Outfit', sans-serif;
      font-size: 0.95rem; font-weight: 700;
      cursor: pointer; margin-bottom: 0;
      display: flex; align-items: center; justify-content: center; gap: 8px;
      transition: all 0.2s;
    }
    .btn-guest-new:hover { border-color: var(--navy); background: var(--bg); }
    .btn-guest-new:active { transform: scale(0.97); }
    .login-divider-new {
      text-align: center; color: var(--text-sub);
      font-size: 0.78rem; margin: 8px 0;
      position: relative;
    }
    .login-divider-new::before,.login-divider-new::after {
      content: ''; position: absolute; top: 50%;
      width: 44%; height: 1px; background: #e2e8f0;
    }
    .login-divider-new::before { left: 0; }
    .login-divider-new::after { right: 0; }
    .guest-note {
      background: #fffbeb; border: 1.5px solid #fcd34d;
      border-radius: var(--radius-sm);
      padding: 8px 12px; font-size: 0.75rem;
      color: #92400e; line-height: 1.6;
      margin-top: 8px;
    }

    /* ログイン関連 */
    .btn-google { background: #fff; color: #1a2340; border: 2px solid #e2e8f0; box-shadow: 0 2px 8px rgba(0,0,0,0.08); display: flex; align-items: center; justify-content: center; gap: 10px; font-size: 1rem; }
    .btn-google:hover { border-color: #4285f4; background: #f8faff; }
    .btn-google img { width: 22px; height: 22px; }
    .btn-trial { background: var(--card2); color: var(--navy); border: 2px dashed #cbd5e1; }
    .btn-trial:hover { border-color: var(--blue); }
    .login-divider { text-align:center; color:var(--text-sub); font-size:0.8rem; margin:10px 0; position:relative; }
    .login-divider::before,.login-divider::after { content:''; position:absolute; top:50%; width:42%; height:1px; background:#e2e8f0; }
    .login-divider::before { left:0; } .login-divider::after { right:0; }
    .warn-box { background:#fffbeb; border:1.5px solid #fcd34d; border-radius:var(--radius-sm); padding:10px 14px; font-size:0.78rem; color:#92400e; line-height:1.7; margin-bottom:12px; }
    .info-box-blue { background:var(--blue-light); border:1.5px solid var(--blue); border-radius:var(--radius-sm); padding:10px 14px; font-size:0.78rem; color:var(--blue-dark); line-height:1.7; margin-bottom:12px; }
    /* ニックネーム設定画面 */
    .nickname-screen { text-align:center; }
    .nickname-icon { font-size:3rem; margin-bottom:8px; }
    .nickname-checking { font-size:0.8rem; color:var(--text-sub); margin-top:4px; min-height:20px; }
    .nickname-ok { color:var(--green); }
    .nickname-ng { color:var(--red); }
    /* ユーザーバッジ（トップ） */
    .user-login-badge { display:flex; align-items:center; gap:10px; background:var(--blue-light); border-radius:var(--radius-sm); padding:10px 14px; margin-bottom:12px; }
    .user-login-photo { width:36px; height:36px; border-radius:50%; object-fit:cover; }
    .user-login-photo-placeholder { width:36px; height:36px; border-radius:50%; background:var(--blue); display:flex; align-items:center; justify-content:center; color:white; font-weight:700; font-size:1rem; }
    .user-login-info { flex:1; }
    .user-login-name { font-family:'Outfit',sans-serif; font-weight:700; color:var(--navy); font-size:0.95rem; }
    .user-login-sub { font-size:0.72rem; color:var(--text-sub); }
    .btn-logout-small { background:none; border:1.5px solid #e2e8f0; border-radius:8px; padding:4px 10px; font-size:0.72rem; color:var(--text-sub); cursor:pointer; font-family:'Outfit',sans-serif; font-weight:600; }
    .btn-logout-small:hover { border-color:var(--red); color:var(--red); }
    /* 説明画面 */
    .help-block { background: var(--card); border-radius: var(--radius-sm); padding: 14px 16px; margin-bottom: 10px; box-shadow: var(--shadow); border-left: 4px solid var(--blue); }
    .help-block.green { border-left-color: var(--green); }
    .help-block.yellow { border-left-color: var(--yellow); }
    .help-block.purple { border-left-color: var(--purple); }
    .help-block.red { border-left-color: var(--red); }
    .help-block-title { font-family: 'Outfit', sans-serif; font-size: 0.95rem; font-weight: 800; color: var(--navy); margin-bottom: 8px; }
    .help-list { list-style: none; padding: 0; }
    .help-list li { font-size: 0.85rem; color: var(--text); line-height: 1.9; padding-left: 1.2em; position: relative; }
    .help-list li::before { content: '→'; position: absolute; left: 0; font-weight: 700; color: var(--blue); }
    .help-block.green .help-list li::before { color: var(--green); }
    .help-block.yellow .help-list li::before { color: var(--yellow); }
    .help-block.purple .help-list li::before { color: var(--purple); }
    .help-block.red .help-list li::before { color: var(--red); }
    .score-formula { background: var(--navy); color: white; border-radius: var(--radius-sm); padding: 10px 14px; font-family: 'Outfit', sans-serif; font-size: 0.88rem; font-weight: 700; text-align: center; margin-top: 10px; line-height: 1.7; }
    .score-formula span { color: #60a5fa; }

    /* ═══ ホーム画面 ═══ */

    /* ヘッダー行 */
    .home-topbar { display:flex; justify-content:space-between; align-items:center; margin-bottom:18px; }
    .home-topbar-logo { font-family:'Outfit',sans-serif; font-size:1.6rem; font-weight:900; color:var(--navy); line-height:1; letter-spacing:-0.02em; }
    .home-topbar-logo span { color:var(--blue); }
    .home-menu-trigger { display:flex; align-items:center; gap:6px; background:var(--card); border:1.5px solid #e2e8f0; border-radius:99px; padding:8px 16px; font-family:'Outfit',sans-serif; font-size:0.82rem; font-weight:700; color:var(--navy); cursor:pointer; transition:all 0.18s; box-shadow:var(--shadow); }
    .home-menu-trigger:hover { border-color:var(--blue); color:var(--blue); background:var(--blue-light); }

    /* ウェルカムテキスト */
    .home-welcome { font-family:'Outfit',sans-serif; font-size:1rem; font-weight:700; color:var(--text-sub); margin-bottom:14px; }

    /* ─── ステータスカード（メニューモーダルの grade-level-display と統一） ─── */
    .level-card {
      background: var(--navy);
      border-radius: 20px;
      padding: 18px 20px;
      margin-bottom: 10px;
      box-shadow: var(--shadow-lg);
      position: relative;
      overflow: hidden;
    }
    .level-card::before {
      content: '';
      position: absolute;
      top: -40px; right: -40px;
      width: 140px; height: 140px;
      border-radius: 50%;
      background: rgba(255,255,255,0.04);
      pointer-events: none;
    }
    /* 上段：学年バッジ ＋ レベルバッジ ＋ マスター率 */
    .level-top { display:flex; justify-content:space-between; align-items:flex-start; margin-bottom:14px; gap:10px; }
    .level-top-left { display:flex; align-items:center; gap:10px; }
    /* 学年ラベル */
    .level-grade-label {
      font-family:'Outfit',sans-serif; font-size:1.0rem; font-weight:800;
      color:rgba(255,255,255,0.85); letter-spacing:0.01em;
    }
    /* LEVELバッジ（メニューモーダルの level-display-badge と同スタイル） */
    .level-badge-wrap {
      background: rgba(255,255,255,0.12);
      border-radius: 10px;
      padding: 5px 10px;
      text-align: center;
      flex-shrink: 0;
    }
    .level-badge-lv-label {
      font-family:'Outfit',sans-serif; font-size:0.55rem; font-weight:700;
      color:rgba(255,255,255,0.5); text-transform:uppercase; letter-spacing:0.1em; display:block;
    }
    .level-badge { font-family:'Outfit',sans-serif; font-size:1.4rem; font-weight:900; color:#60a5fa; line-height:1; }
    /* 右：マスター率 */
    .level-master-rate { font-family:'Outfit',sans-serif; font-size:0.8rem; font-weight:700; color:#60a5fa; }

    /* 称号行 */
    .level-title { font-size:0.9rem; color:rgba(255,255,255,0.75); margin-bottom:12px; font-weight:600; }

    /* プログレスバー（メニューモーダルと同スタイル） */
    .level-bar-bg { background:rgba(255,255,255,0.12); border-radius:99px; height:6px; overflow:hidden; margin-bottom:6px; }
    .level-bar { height:100%; border-radius:99px; background:linear-gradient(90deg,#60a5fa,#a78bfa); transition:width 0.8s ease; }
    .level-bar-label { font-size:0.7rem; color:rgba(255,255,255,0.4); text-align:right; }

    /* ─── プランカード（homeScreen版）─── */
    /* plan-card / plan-info / plan-name / plan-desc / plan-upgrade-btn はメニューモーダルと共通クラスを使用 */
    .home-plan-section { margin-bottom:12px; }

    /* ─── 学習メニューリスト（menu-item と共通スタイルで再構築） ─── */
    .home-menu-grid { display:grid; grid-template-columns:1fr; gap:8px; margin-bottom:12px; }

    /* menu-item の拡張版としてアイコン列を持つカード */
    .home-menu-card {
      display:flex; align-items:center; gap:14px;
      background:var(--card);
      border-radius:16px;
      padding:14px 16px;
      box-shadow: 0 1px 6px rgba(20,146,204,0.08);
      border:1.5px solid #f1f5f9;
      cursor:pointer;
      transition:all 0.18s;
      text-decoration:none;
    }
    .home-menu-card:hover { border-color:var(--blue); background:var(--blue-light); transform:translateY(-1px); box-shadow:var(--shadow-lg); }
    .home-menu-card:active { transform:scale(0.98); }
    .home-menu-card.disabled { opacity:0.5; cursor:default; pointer-events:none; }

    .home-menu-icon {
      font-size:1.5rem; width:44px; height:44px;
      background:var(--bg); border-radius:12px;
      display:flex; align-items:center; justify-content:center;
      flex-shrink:0;
    }
    .home-menu-info { flex:1; }
    .home-menu-title {
      font-family:'Outfit',sans-serif; font-size:0.95rem; font-weight:800;
      color:var(--navy); display:flex; align-items:center; gap:6px; margin-bottom:2px;
    }
    .home-menu-sub { font-size:0.75rem; color:var(--text-sub); line-height:1.5; }
    .home-menu-arrow { color:var(--text-sub); font-size:1rem; flex-shrink:0; }

    /* バッジ（free / paid）*/
    .home-menu-badge { font-size:0.62rem; font-weight:700; padding:2px 8px; border-radius:99px; position:relative; overflow:hidden; }
    .badge-free { background:var(--green-light); color:var(--green); }

    /* ─── 有料バッジ：キラッと光るシャイン ─── */
    .badge-paid {
      background: linear-gradient(135deg, #7c3aed 0%, #a855f7 50%, #7c3aed 100%);
      background-size: 200% 200%;
      color: white;
      box-shadow: 0 0 6px rgba(139,92,246,0.45);
      animation: badgePaidPulse 2.4s ease-in-out infinite;
    }
    .badge-paid::after {
      content: '';
      position: absolute;
      top: 0; left: -70%;
      width: 50%; height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255,255,255,0.55), transparent);
      transform: skewX(-15deg);
      animation: badgePaidShine 2.4s ease-in-out infinite;
    }
    @keyframes badgePaidPulse {
      0%,100% { box-shadow: 0 0 5px rgba(139,92,246,0.4); }
      50%      { box-shadow: 0 0 12px rgba(168,85,247,0.7); }
    }
    @keyframes badgePaidShine {
      0%    { left: -70%; }
      40%,100% { left: 130%; }
    }

    /* ─── homeScreen ヒーローエリア ─── */
    /* 背景キャンバス（homeScreen専用・topScreenとは別管理） */
    #homeBgCanvas {
      position: fixed; top: 0; left: 0;
      width: 100%; height: 100%;
      pointer-events: none; z-index: 0;
      opacity: 0.55;
    }

    /* ヒーローラッパー（トップバー〜ウェルカム〜レベルカード） */
    .home-hero-wrap {
      position: relative;
      overflow: hidden;
      border-radius: 20px;
      margin-bottom: 12px;
      padding: 0;
      background: transparent;
    }
    /* ヒーロー内コンテンツは z-index:1 で前面に */
    .home-hero-wrap > * { position: relative; z-index: 1; }

    /* トップバー・ウェルカムを hero-wrap 内に入れたので余白調整 */
    .home-hero-wrap .home-topbar    { margin-bottom: 10px; padding-top: 4px; }
    .home-hero-wrap .home-welcome   { margin-bottom: 10px; }
    .home-hero-wrap .level-card     { margin-bottom: 0; }

    /* angle-radius 統一：全カード20px */
    .level-card     { border-radius: 20px; }
    .home-menu-card { border-radius: 20px; }
    .home-sub-btn   { border-radius: 20px; }
    .home-plan-section .plan-card { border-radius: 20px; }

    /* ─── ボトムボタン行（btn-outline の統一） ─── */
    .home-sub-row { display:grid; grid-template-columns:1fr 1fr; gap:8px; margin-bottom:0; }
    .home-sub-btn {
      display:flex; align-items:center; justify-content:center; gap:6px;
      background:var(--card);
      border:1.5px solid #e2e8f0;
      border-radius:14px;
      padding:14px 10px;
      font-family:'Outfit',sans-serif; font-size:0.88rem; font-weight:700;
      color:var(--navy); cursor:pointer; transition:all 0.18s;
      box-shadow: 0 1px 4px rgba(0,0,0,0.04);
    }
    .home-sub-btn:hover { border-color:var(--blue); color:var(--blue); background:var(--blue-light); }
    .home-sub-btn:active { transform:scale(0.97); }

    /* 設定 */
    .setting-section { margin-bottom: 16px; }
    .option-grid { display: flex; gap: 8px; flex-wrap: wrap; }
    .option-btn { padding: 8px 16px; border-radius: 10px; border: 2px solid #e2e8f0; background: var(--card); font-family: 'Outfit', sans-serif; font-size: 0.9rem; font-weight: 600; color: var(--text-sub); cursor: pointer; transition: all 0.15s; }
    .option-btn:hover { border-color: var(--blue); color: var(--blue); background: var(--blue-light); }
    .option-btn.selected { border-color: var(--blue); background: var(--blue-light); color: var(--blue); box-shadow: 0 2px 8px rgba(20,146,204,0.18); }
    .option-btn:active { transform: scale(0.96); }
    .toggle-row { display: flex; justify-content: space-between; align-items: center; padding: 12px 0; border-bottom: 1px solid #f1f5f9; }
    .toggle-label { font-size: 0.95rem; color: var(--navy); font-weight: 500; }
    .toggle { width: 44px; height: 24px; background: #e2e8f0; border-radius: 99px; position: relative; cursor: pointer; transition: background 0.2s; border: none; flex-shrink: 0; }
    .toggle.on { background: var(--blue); }
    .toggle::after { content: ''; position: absolute; width: 18px; height: 18px; background: white; border-radius: 50%; top: 3px; left: 3px; transition: left 0.2s; box-shadow: 0 1px 4px rgba(0,0,0,0.2); }
    .toggle.on::after { left: 23px; }

    /* ─── 設定画面モダンデザイン ─── */
    .setting-page-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 20px;
      padding-top: 4px;
    }
    .setting-back-btn {
      display: flex; align-items: center; gap: 4px;
      background: var(--card);
      border: 1.5px solid #e2e8f0;
      border-radius: 99px;
      padding: 8px 14px;
      font-family: 'Outfit', sans-serif;
      font-size: 0.82rem; font-weight: 700;
      color: var(--navy); cursor: pointer;
      transition: all 0.18s;
      box-shadow: var(--shadow);
      flex-shrink: 0;
    }
    .setting-back-btn:hover { border-color: var(--blue); color: var(--blue); background: var(--blue-light); }
    .setting-back-btn:active { transform: scale(0.96); }
    .setting-header-title-wrap { flex: 1; }
    .setting-header-logo {
      font-family: 'Outfit', sans-serif;
      font-size: 1.1rem; font-weight: 900;
      color: var(--navy); letter-spacing: -0.01em;
    }
    .setting-header-logo span { color: var(--blue); }
    .setting-header-sub {
      font-size: 0.72rem; color: var(--text-sub); margin-top: 1px;
    }
    .setting-card-modern {
      background: var(--card);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      border: 1px solid rgba(20,146,204,0.08);
      margin-bottom: 16px;
      overflow: hidden;
    }
    .setting-group {
      padding: 16px 18px;
      margin-bottom: 0;
    }
    .setting-group-label {
      font-size: 0.72rem;
      font-weight: 800;
      color: var(--text-sub);
      text-transform: uppercase;
      letter-spacing: 0.08em;
      margin-bottom: 10px;
    }
    .setting-divider {
      height: 1px;
      background: rgba(226,232,240,0.8);
      margin: 0 18px;
    }
    .btn-start-modern {
      width: 100%;
      padding: 16px;
      border-radius: 14px;
      border: none;
      font-family: 'Outfit', sans-serif;
      font-size: 1.05rem;
      font-weight: 700;
      cursor: pointer;
      transition: all 0.2s;
      background: #1a5f8a;
      color: white;
      box-shadow: 0 6px 20px rgba(26,95,138,0.40), 0 2px 6px rgba(0,0,0,0.12);
      letter-spacing: 0.03em;
    }
    .btn-start-modern:hover { background: #164e74; box-shadow: 0 8px 24px rgba(26,95,138,0.45); }
    .btn-start-modern:active { transform: scale(0.97); }

    /* クイズ */
    .quiz-hud { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 10px; }
    .hud-card { background: var(--card); border-radius: var(--radius-sm); padding: 10px 14px; box-shadow: var(--shadow); }
    .hud-label { font-size: 0.7rem; color: var(--text-sub); font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 2px; }
    .hud-value { font-family: 'Outfit', sans-serif; font-size: 1.3rem; font-weight: 800; color: var(--navy); }
    .hud-value.blue { color: var(--blue); }
    .timer-card { background: var(--card); border-radius: var(--radius-sm); padding: 10px 14px; box-shadow: var(--shadow); margin-bottom: 10px; }
    .timer-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
    .timer-label { font-size: 0.72rem; color: var(--text-sub); font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; }
    .timer-num { font-family: 'Outfit', sans-serif; font-size: 0.95rem; font-weight: 700; color: var(--navy); }
    .timer-bar-bg { background: var(--bg); border-radius: 99px; height: 7px; overflow: hidden; }
    .timer-bar { height: 100%; border-radius: 99px; background: linear-gradient(90deg, var(--blue), #60a5fa); transition: width 1s linear, background 0.5s; }
    .timer-bar.danger { background: linear-gradient(90deg, var(--red), #f87171); }
    .question-card { background: var(--card); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); margin-bottom: 10px; }
    .question-tag { display: inline-block; background: var(--blue-light); color: var(--blue); font-size: 0.68rem; font-weight: 700; padding: 3px 10px; border-radius: 99px; margin-bottom: 10px; text-transform: uppercase; letter-spacing: 0.08em; }
    .jp-text { font-size: 1.2rem; font-weight: 700; color: var(--navy); margin-bottom: 10px; line-height: 1.5; }
    .blank-text { font-size: 1rem; color: var(--text-sub); background: var(--bg); border-radius: var(--radius-sm); padding: 10px 14px; line-height: 2.4; word-break: break-all; }
    .blank-badge { display: inline-block; background: var(--blue); color: white; font-family: "Outfit", sans-serif; font-weight: 600; font-size: 0.85rem; padding: 4px 16px; border-radius: 99px; margin: 0 4px; vertical-align: middle; letter-spacing: 0.1em; box-shadow: 0 3px 0 var(--blue-dark); border: none; line-height: 1.6; text-transform: uppercase; }
    .input-card { background: var(--card); border-radius: var(--radius-sm); padding: 12px 14px; box-shadow: var(--shadow); border: 1.5px solid rgba(20,146,204,0.12); transition: border 0.2s; margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }
    .input-card:focus-within { border-color: var(--blue); }
    .input-card.correct { border-color: var(--green); background: var(--green-light); }
    .input-card.wrong { border-color: var(--red); background: var(--red-light); }
    .input-inner { flex: 1; }
    .input-label { font-size: 0.68rem; font-weight: 700; color: var(--text-sub); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 3px; }
    .input-field { width: 100%; border: none; background: transparent; font-family: 'Outfit', sans-serif; font-size: 1.05rem; font-weight: 600; color: var(--navy); outline: none; }
    .input-field::placeholder { color: #cbd5e1; font-weight: 400; }
    .hint-btn { background: var(--blue-light); border: none; border-radius: 8px; padding: 6px 10px; font-size: 0.75rem; font-weight: 700; color: var(--blue); cursor: pointer; white-space: nowrap; transition: all 0.15s; flex-shrink: 0; }
    .hint-btn:hover { background: var(--blue); color: white; }
    .hint-btn:disabled { opacity: 0.3; cursor: not-allowed; background: var(--blue-light); color: var(--blue); }
    .hint-count { font-size: 0.65rem; display: block; text-align: center; margin-top: 2px; }
    .feedback-card { border-radius: var(--radius-sm); padding: 12px 14px; margin-bottom: 8px; display: none; animation: fadeIn 0.3s ease; }
    .feedback-card.correct { background: var(--green-light); border: 1.5px solid var(--green); }
    .feedback-card.wrong { background: var(--red-light); border: 1.5px solid var(--red); }
    .feedback-emoji { font-size: 1.6rem; display: block; margin-bottom: 3px; }
    .feedback-text { font-family: 'Outfit', sans-serif; font-size: 1.1rem; font-weight: 800; color: var(--navy); }
    .feedback-ans { font-size: 0.85rem; color: var(--text-sub); margin-top: 3px; }
    .graduated-badge { display: none; background: var(--purple-light); border: 1.5px solid var(--purple); border-radius: var(--radius-sm); padding: 7px 12px; font-size: 0.85rem; font-weight: 600; color: var(--purple); margin-bottom: 8px; text-align: center; }
    @keyframes fadeIn { from{opacity:0;transform:translateY(4px)} to{opacity:1;transform:translateY(0)} }

    /* 結果 */
    .result-header { background: var(--navy); border-radius: var(--radius); padding: 24px; text-align: center; margin-bottom: 12px; box-shadow: var(--shadow-lg); }
    .result-emoji { font-size: 2.8rem; margin-bottom: 6px; }
    .result-msg { font-family: 'Outfit', sans-serif; font-size: 1.2rem; font-weight: 700; color: white; margin-bottom: 12px; }
    .result-score { font-family: 'Outfit', sans-serif; font-size: 3.5rem; font-weight: 800; color: #60a5fa; line-height: 1; }
    .result-score-label { font-size: 0.85rem; color: rgba(255,255,255,0.5); margin-top: 4px; }
    .result-stats { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; margin-bottom: 12px; }
    .stat-card { background: var(--card); border-radius: var(--radius-sm); padding: 12px 8px; text-align: center; box-shadow: var(--shadow); }
    .stat-value { font-family: 'Outfit', sans-serif; font-size: 1.4rem; font-weight: 800; color: var(--navy); }
    .stat-label { font-size: 0.68rem; color: var(--text-sub); margin-top: 2px; }
    .review-section { background: var(--card); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); margin-bottom: 12px; }
    .review-title { font-family: 'Outfit', sans-serif; font-size: 0.82rem; font-weight: 700; color: var(--text-sub); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 10px; }
    .review-item { border-left: 3px solid var(--red); padding: 8px 10px; margin-bottom: 6px; background: var(--red-light); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
    .review-jp { font-size: 0.9rem; font-weight: 700; color: var(--navy); margin-bottom: 2px; }
    .review-ans { font-family: 'Outfit', sans-serif; font-size: 0.85rem; font-weight: 700; color: var(--green); }
    .review-all-correct { text-align: center; padding: 16px; color: var(--green); font-weight: 700; }

    /* ランキング登録モーダル */
    #rankingModal { position: fixed; top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.6);z-index:1000;display:none;align-items:center;justify-content:center;padding:16px; }
    #rankingModal.show { display: flex; }
    .modal-box { background: var(--card); border-radius: var(--radius); padding: 24px; width: 100%; max-width: 360px; box-shadow: var(--shadow-lg); }
    .modal-title { font-family: 'Outfit', sans-serif; font-size: 1.1rem; font-weight: 800; color: var(--navy); margin-bottom: 6px; }
    .modal-sub { font-size: 0.82rem; color: var(--text-sub); margin-bottom: 16px; line-height: 1.6; }
    .score-preview { background: var(--bg); border-radius: 10px; padding: 10px 14px; font-size: 0.85rem; color: var(--navy); margin-bottom: 16px; line-height: 1.9; }

    /* ─── メニューモーダル ─── */
    #menuModal { display:none; position:fixed; inset:0; background:rgba(0,0,0,0.52); z-index:1000; align-items:flex-end; justify-content:center; backdrop-filter:blur(3px); -webkit-backdrop-filter:blur(3px); }
    #menuModal.open { display:flex; animation:menuOverlayIn 0.25s ease; }
    @keyframes menuOverlayIn { from{opacity:0} to{opacity:1} }
    .menu-sheet { background:var(--card); border-radius:28px 28px 0 0; width:100%; max-width:480px; max-height:92vh; overflow-y:auto; padding:0 0 env(safe-area-inset-bottom,24px); animation:menuSheetIn 0.32s cubic-bezier(0.34,1.56,0.64,1); overscroll-behavior:contain; }
    @keyframes menuSheetIn { from{transform:translateY(100%)} to{transform:translateY(0)} }
    .menu-handle { width:44px; height:5px; background:#ddd; border-radius:99px; margin:14px auto 0; }
    .menu-profile { display:flex; align-items:center; gap:14px; padding:16px 20px 18px; border-bottom:1px solid #f1f5f9; }
    .menu-avatar { width:54px; height:54px; border-radius:50%; flex-shrink:0; object-fit:cover; border:3px solid var(--blue-light); }
    .menu-avatar-placeholder { width:54px; height:54px; border-radius:50%; background:linear-gradient(135deg,var(--blue),var(--blue-dark)); display:flex; align-items:center; justify-content:center; color:white; font-weight:800; font-size:1.3rem; font-family:'Outfit',sans-serif; flex-shrink:0; border:3px solid var(--blue-light); }
    .menu-profile-info { flex:1; min-width:0; }
    .menu-profile-name { font-family:'Outfit',sans-serif; font-size:1.05rem; font-weight:800; color:var(--navy); white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
    .menu-profile-email { font-size:0.72rem; color:var(--text-sub); margin-top:2px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
    .menu-close-btn { background:#f1f5f9; border:none; width:32px; height:32px; border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:1rem; color:var(--text-sub); cursor:pointer; flex-shrink:0; transition:background 0.15s; }
    .menu-close-btn:hover { background:#e2e8f0; color:var(--navy); }
    .menu-section { padding:16px 20px; border-bottom:1px solid #f1f5f9; }
    .menu-section-label { font-size:0.68rem; font-weight:700; color:var(--text-sub); text-transform:uppercase; letter-spacing:0.1em; margin-bottom:10px; }
    .plan-card { border-radius:16px; padding:14px 16px; display:flex; align-items:center; gap:12px; position:relative; overflow:hidden; }
    .plan-card.free { background:var(--bg); border:1.5px solid #e2e8f0; }
    .plan-card.premium { background:linear-gradient(135deg,#1a2340 0%,#0E6E99 100%); border:none; }
    .plan-card.lifetime { background:linear-gradient(135deg,#78350f 0%,#d97706 100%); border:none; }
    .plan-icon { font-size:1.8rem; flex-shrink:0; }
    .plan-info { flex:1; min-width:0; }
    .plan-name { font-family:'Outfit',sans-serif; font-size:0.88rem; font-weight:800; }
    .plan-card.free .plan-name { color:var(--navy); }
    .plan-card.premium .plan-name, .plan-card.lifetime .plan-name { color:white; }
    .plan-desc { font-size:0.72rem; margin-top:2px; line-height:1.5; }
    .plan-card.free .plan-desc { color:var(--text-sub); }
    .plan-card.premium .plan-desc, .plan-card.lifetime .plan-desc { color:rgba(255,255,255,0.72); }
    .plan-upgrade-btn { font-family:'Outfit',sans-serif; font-size:0.75rem; font-weight:700; background:var(--blue); color:white; border:none; border-radius:99px; padding:7px 14px; cursor:pointer; white-space:nowrap; flex-shrink:0; transition:background 0.15s; }
    .plan-upgrade-btn:hover { background:var(--blue-dark); }
    .plan-badge { font-family:'Outfit',sans-serif; font-size:0.65rem; font-weight:700; background:rgba(255,255,255,0.2); color:white; border-radius:99px; padding:3px 10px; flex-shrink:0; }
    .grade-segment { display:flex; gap:6px; background:var(--bg); border-radius:14px; padding:4px; margin-bottom:12px; }
    .grade-seg-btn { flex:1; border:none; border-radius:10px; padding:9px 4px; cursor:pointer; font-family:'Outfit',sans-serif; font-size:0.72rem; font-weight:700; color:var(--text-sub); background:transparent; transition:all 0.18s; display:flex; flex-direction:column; align-items:center; gap:2px; line-height:1.2; }
    .grade-seg-btn .seg-grade { font-size:0.78rem; }
    .grade-seg-btn .seg-lv { font-size:0.6rem; font-weight:600; }
    .grade-seg-btn.selected { background:white; color:var(--blue); box-shadow:0 2px 8px rgba(20,146,204,0.18); }
    .grade-seg-btn.selected .seg-grade { color:var(--blue); }
    .grade-seg-btn.selected .seg-lv { color:var(--blue-dark); }
    .grade-level-display { background:var(--navy); border-radius:14px; padding:14px 16px; display:flex; align-items:center; gap:12px; animation:levelCardFadeIn 0.2s ease; }
    @keyframes levelCardFadeIn { from{opacity:0;transform:translateY(4px)} to{opacity:1;transform:translateY(0)} }
    .level-display-badge { background:rgba(255,255,255,0.12); border-radius:12px; padding:8px 12px; text-align:center; flex-shrink:0; }
    .level-display-lv { font-family:'Outfit',sans-serif; font-size:0.65rem; font-weight:700; color:rgba(255,255,255,0.5); text-transform:uppercase; letter-spacing:0.08em; }
    .level-display-num { font-family:'Outfit',sans-serif; font-size:1.6rem; font-weight:900; color:#60a5fa; line-height:1; }
    .level-display-info { flex:1; }
    .level-display-title { font-size:0.95rem; font-weight:700; color:white; margin-bottom:6px; }
    .level-display-bar-bg { background:rgba(255,255,255,0.12); border-radius:99px; height:6px; overflow:hidden; margin-bottom:4px; }
    .level-display-bar { height:100%; border-radius:99px; background:linear-gradient(90deg,#60a5fa,#a78bfa); transition:width 0.6s ease; }
    .level-display-sub { font-size:0.7rem; color:rgba(255,255,255,0.45); }
    .menu-item { display:flex; align-items:center; justify-content:space-between; padding:13px 16px; border-radius:12px; cursor:pointer; margin-bottom:6px; border:1.5px solid #f1f5f9; transition:all 0.15s; text-decoration:none; }
    .menu-item:hover { border-color:var(--blue); background:var(--blue-light); }
    .menu-item.disabled { opacity:0.45; cursor:default; pointer-events:none; }
    .menu-item-left { display:flex; align-items:center; gap:10px; }
    .menu-item-icon { font-size:1.1rem; width:24px; text-align:center; }
    .menu-item-text { font-size:0.9rem; font-weight:600; color:var(--navy); }
    .menu-item-right { display:flex; align-items:center; gap:6px; }
    .menu-item-arrow { color:var(--text-sub); font-size:1rem; }
    .menu-item-badge { font-size:0.62rem; font-weight:700; background:#fee2e2; color:#ef4444; border-radius:99px; padding:2px 8px; }
    .menu-logout-btn { width:calc(100% - 40px); margin:4px 20px 20px; padding:14px; border:2px solid #fee2e2; background:white; color:#ef4444; border-radius:14px; font-family:'Outfit',sans-serif; font-size:0.95rem; font-weight:700; cursor:pointer; transition:all 0.15s; display:block; }
    .menu-logout-btn:hover { background:#fee2e2; }
    .menu-item-danger { border-color:#fecaca !important; background:#fff5f5; }
    .menu-item-danger:hover { border-color:#ef4444 !important; background:#fee2e2; }
    .menu-item-text-danger { color:#ef4444; }

    /* ─── オプションパネル ─── */
    .menu-option-panel { display:none; position:absolute; inset:0; background:var(--card); border-radius:28px 28px 0 0; overflow-y:auto; overscroll-behavior:contain; z-index:10; }
    .menu-option-panel.open { display:block; animation:optionPanelIn 0.28s cubic-bezier(0.34,1.2,0.64,1); }
    @keyframes optionPanelIn { from{transform:translateX(40px);opacity:0} to{transform:translateX(0);opacity:1} }
    .menu-option-header { display:flex; align-items:center; justify-content:space-between; padding:16px 20px 12px; border-bottom:1px solid #f1f5f9; }
    .menu-option-back { background:none; border:none; font-family:'Outfit',sans-serif; font-size:0.95rem; font-weight:700; color:var(--blue); cursor:pointer; padding:4px 0; width:60px; text-align:left; }
    .menu-option-title { font-family:'Outfit',sans-serif; font-size:1rem; font-weight:800; color:var(--navy); }
    .toggle-switch { width:44px; height:26px; background:#e2e8f0; border-radius:99px; position:relative; transition:background 0.2s; flex-shrink:0; }
    .toggle-switch.toggle-on { background:var(--blue); }
    .toggle-switch.toggle-disabled { opacity:0.4; cursor:default; }
    .toggle-knob { position:absolute; top:3px; left:3px; width:20px; height:20px; background:white; border-radius:50%; box-shadow:0 1px 4px rgba(0,0,0,0.2); transition:left 0.2s; }
    .toggle-switch.toggle-on .toggle-knob { left:21px; }

    /* ─── オプションパネル ─── */
    .menu-option-panel {
      display: none;
      position: absolute;
      inset: 0;
      background: var(--card);
      border-radius: 28px 28px 0 0;
      overflow-y: auto;
      animation: optionPanelIn 0.28s cubic-bezier(0.34,1.2,0.64,1);
      overscroll-behavior: contain;
    }
    .menu-option-panel.open {
      display: block;
    }
    @keyframes optionPanelIn {
      from { transform: translateX(100%); opacity: 0; }
      to   { transform: translateX(0);   opacity: 1; }
    }
    .menu-option-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 16px 20px 12px;
      border-bottom: 1px solid #f1f5f9;
    }
    .menu-option-back {
      background: none;
      border: none;
      font-family: 'Outfit', sans-serif;
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--blue);
      cursor: pointer;
      padding: 4px 0;
      width: 60px;
    }
    .menu-option-title {
      font-family: 'Outfit', sans-serif;
      font-size: 1rem;
      font-weight: 800;
      color: var(--navy);
    }
    /* トグルスイッチ */
    .toggle-switch {
      width: 44px; height: 26px;
      background: #e2e8f0;
      border-radius: 99px;
      position: relative;
      transition: background 0.2s;
      flex-shrink: 0;
    }
    .toggle-switch.toggle-on { background: var(--blue); }
    .toggle-switch.toggle-disabled { opacity: 0.4; cursor: default; }
    .toggle-knob {
      position: absolute;
      top: 3px; left: 3px;
      width: 20px; height: 20px;
      background: white;
      border-radius: 50%;
      box-shadow: 0 1px 4px rgba(0,0,0,0.2);
      transition: left 0.2s;
    }
    .toggle-switch.toggle-on .toggle-knob { left: 21px; }
    /* menu-sheetをrelativeに */
    .menu-sheet { position: relative; }

    /* ランキング画面 */
    .ranking-header { background: var(--navy); border-radius: var(--radius); padding: 16px 20px; margin-bottom: 12px; text-align: center; box-shadow: var(--shadow-lg); }
    .ranking-header-title { font-family: 'Outfit', sans-serif; font-size: 1.3rem; font-weight: 800; color: white; }
    .ranking-header-sub { font-size: 0.78rem; color: rgba(255,255,255,0.5); margin-top: 4px; }
    .ranking-filter { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 12px; }
    .rank-filter-btn { padding: 6px 14px; border-radius: 99px; border: 2px solid #e2e8f0; background: var(--card); font-family: 'Outfit', sans-serif; font-size: 0.82rem; font-weight: 600; color: var(--text-sub); cursor: pointer; transition: all 0.15px; }
    .rank-filter-btn.active { border-color: var(--blue); background: var(--blue-light); color: var(--blue); }
    .ranking-item { background: var(--card); border-radius: var(--radius-sm); padding: 12px 16px; margin-bottom: 8px; display: flex; align-items: center; gap: 12px; box-shadow: var(--shadow); border: 2px solid transparent; }
    .ranking-item.gold { border-color: #f59e0b; background: #fffbeb; }
    .ranking-item.silver { border-color: #94a3b8; }
    .ranking-item.bronze { border-color: #b45309; background: #fef3c7; }
    .rank-num { font-family: 'Outfit', sans-serif; font-size: 1.2rem; font-weight: 900; width: 28px; text-align: center; flex-shrink: 0; color: var(--text-sub); }
    .rank-info { flex: 1; }
    .rank-name { font-family: 'Outfit', sans-serif; font-weight: 700; color: var(--navy); font-size: 0.95rem; }
    .rank-meta { font-size: 0.72rem; color: var(--text-sub); margin-top: 2px; }
    .ranking-empty { text-align: center; padding: 32px; color: var(--text-sub); font-size: 0.9rem; line-height: 1.8; }
    .ranking-loading { text-align: center; padding: 24px; color: var(--text-sub); font-size: 0.85rem; }
    .rank-time { font-size: 0.68rem; color: var(--text-sub); margin-top: 2px; }

    /* エフェクト */
    canvas#fireworksCanvas { position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:998;display:none; }
    #correctCircle { position:fixed;top:50%;left:50%;transform:translate(-50%,-50%) scale(0);width:280px;height:280px;border-radius:50%;border:12px solid var(--blue);opacity:0;pointer-events:none;z-index:999; }
    #correctCircle.animate { animation:circleAnim 0.8s ease-out forwards; }
    @keyframes circleAnim { 0%{transform:translate(-50%,-50%) scale(0);opacity:0.8} 60%{transform:translate(-50%,-50%) scale(1.1);opacity:0.5} 100%{transform:translate(-50%,-50%) scale(1.4);opacity:0} }
    #wrongMark { position:fixed;top:50%;left:50%;transform:translate(-50%,-50%) scale(0);width:180px;height:180px;opacity:0;pointer-events:none;z-index:999; }
    #wrongMark.animate { animation:wrongAnim 0.8s ease-out forwards; }
    @keyframes wrongAnim { 0%{transform:translate(-50%,-50%) scale(0);opacity:0} 30%{transform:translate(-50%,-50%) scale(1.2);opacity:1} 70%{transform:translate(-50%,-50%) scale(1.0);opacity:1} 100%{transform:translate(-50%,-50%) scale(1.0);opacity:0} }
    .wrong-line { position:absolute;width:100%;height:14px;background:var(--red);border-radius:99px;top:50%;left:0;transform-origin:center; }
    .wrong-line:nth-child(1) { transform:translateY(-50%) rotate(45deg); }
    .wrong-line:nth-child(2) { transform:translateY(-50%) rotate(-45deg); }
    #speedBanner { position:fixed;top:50%;left:50%;transform:translate(-50%,-50%) scale(0);background:linear-gradient(135deg,var(--blue),var(--navy));color:white;font-family:'Outfit',sans-serif;font-size:1.6rem;font-weight:800;padding:14px 28px;border-radius:var(--radius);pointer-events:none;z-index:1000;opacity:0;white-space:nowrap;box-shadow:var(--shadow-lg); }
    #speedBanner.animate { animation:bannerAnim 1.5s ease-out forwards; }
    @keyframes bannerAnim { 0%{transform:translate(-50%,-50%) scale(0);opacity:0} 20%{transform:translate(-50%,-50%) scale(1.05);opacity:1} 70%{transform:translate(-50%,-50%) scale(1.0);opacity:1} 100%{transform:translate(-50%,-50%) scale(1.0);opacity:0} }
    /* ────────────────────────────────────────
   カルーセル
──────────────────────────────────────── */
.benefit-carousel-wrap {
  position: relative; overflow: hidden;
  margin-bottom: 16px; touch-action: pan-y;
}
.benefit-carousel-track {
  display: flex;
  transition: transform 0.38s cubic-bezier(0.25,0.8,0.25,1);
  will-change: transform;
}
.benefit-carousel-card {
  min-width: 100%;
  background: var(--card);
  border: 1.5px solid #f1f5f9;
  border-radius: 20px;
  padding: 18px 16px;
  display: flex; align-items: flex-start; gap: 14px;
  box-shadow: 0 2px 12px rgba(20,146,204,0.08);
  box-sizing: border-box;
}
.benefit-carousel-icon {
  width: 52px; height: 52px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; font-size: 1.6rem;
}
.bc-blue   { background: var(--blue-light); }
.bc-green  { background: var(--green-light); }
.bc-purple { background: var(--purple-light); }
.bc-gold   { background: var(--yellow-light); }
.benefit-carousel-body { flex: 1; }
.benefit-carousel-top {
  display: flex; align-items: center; gap: 8px; margin-bottom: 4px;
}
.benefit-carousel-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1rem; font-weight: 800; color: var(--navy);
}
.benefit-carousel-badge {
  font-size: 0.6rem; font-weight: 700;
  padding: 2px 8px; border-radius: 99px; flex-shrink: 0;
}
.bc-badge-free { background: var(--green-light); color: var(--green); }
.benefit-carousel-desc { font-size: 0.78rem; color: var(--text-sub); line-height: 1.6; }
.benefit-carousel-dots {
  display: flex; justify-content: center; gap: 6px; margin-top: 10px;
}
.bc-dot {
  width: 6px; height: 6px; border-radius: 99px;
  background: #d4cec3; border: none; cursor: pointer;
  transition: width 0.25s, background 0.25s; padding: 0;
}
.bc-dot.active { width: 20px; background: var(--blue); }

/* ────────────────────────────────────────
   レベルカード 3Dフリップ
──────────────────────────────────────── */
.level-card-flipper {
  perspective: 900px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.level-card-inner {
  position: relative; width: 100%;
  transform-style: preserve-3d;
  transition: transform 0.55s cubic-bezier(0.34,1.2,0.64,1);
}
.level-card-flipper.flipped .level-card-inner {
  transform: rotateY(180deg);
}
.level-card-front, .level-card-back {
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}
.level-card-back {
  position: absolute; top: 0; left: 0;
  width: 100%; height: 100%;
  transform: rotateY(180deg);
  background: linear-gradient(135deg,#1e3a5f 0%,#0E6E99 60%,#14b8a6 100%);
  border-radius: 20px;
  padding: 20px 18px;
  display: flex; flex-direction: column; justify-content: center;
  color: white; box-sizing: border-box;
  box-shadow: 0 8px 32px rgba(14,110,153,0.35);
}
.lc-back-hint {
  font-size: 0.68rem; font-weight: 700;
  color: rgba(255,255,255,0.55);
  text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 12px;
}
.lc-back-row {
  display: flex; align-items: flex-start; gap: 12px; margin-bottom: 12px;
}
.lc-back-icon {
  width: 40px; height: 40px; border-radius: 12px;
  background: rgba(255,255,255,0.15);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; flex-shrink: 0;
}
.lc-back-label { font-size: 0.72rem; color: rgba(255,255,255,0.6); margin-bottom: 3px; }
.lc-back-value {
  font-family: 'Outfit',sans-serif;
  font-size: 1.3rem; font-weight: 800; color: white; line-height: 1.1;
}
.lc-back-value .lc-unit { font-size: 0.8rem; font-weight: 600; color: rgba(255,255,255,0.7); }
.lc-back-next-title {
  font-family: 'Outfit',sans-serif;
  font-size: 1rem; font-weight: 800; color: #f59e0b;
  text-shadow: 0 0 10px rgba(245,158,11,0.5);
}
.lc-back-tap {
  text-align: right; font-size: 0.65rem;
  color: rgba(255,255,255,0.35); margin-top: 8px;
}
.lc-front-tap-hint {
  font-size: 0.62rem; color: rgba(255,255,255,0.28);
  text-align: center; margin-top: 4px; pointer-events: none;
}
/* ── 正解：緑フラッシュ ── */
@keyframes glowGreen {
  0%   { box-shadow: 0 0 0 0   rgba(16,185,129,0.0), var(--shadow); }
  40%  { box-shadow: 0 0 0 12px rgba(16,185,129,0.35), var(--shadow); }
  100% { box-shadow: 0 0 0 4px rgba(16,185,129,0.18), var(--shadow); }
}

/* ── 不正解：赤フラッシュ ── */
@keyframes glowRed {
  0%   { box-shadow: 0 0 0 0   rgba(232,96,76,0.0), var(--shadow); }
  40%  { box-shadow: 0 0 0 12px rgba(232,96,76,0.38), var(--shadow); }
  100% { box-shadow: 0 0 0 4px rgba(232,96,76,0.18), var(--shadow); }
}

/* ── 不正解：シェイク ── */
@keyframes shake {
  0%,100% { transform: translateX(0); }
  15%     { transform: translateX(-8px); }
  30%     { transform: translateX(7px); }
  45%     { transform: translateX(-6px); }
  60%     { transform: translateX(5px); }
  75%     { transform: translateX(-3px); }
  90%     { transform: translateX(2px); }
}

/* ── 正解：王冠ふわり ── */
/* ===== ワープ＆カウントダウン演出 ===== */
    #warpOverlay {
      position: fixed; inset: 0; z-index: 9000;
      background: rgba(0,0,0,0); pointer-events: none;
      transition: background 0.3s ease;
    }
    #warpOverlay.active { pointer-events: all; }

    #countdownDisplay {
      position: fixed; inset: 0; z-index: 9100;
      display: flex; align-items: center; justify-content: center;
      pointer-events: none;
    }
    #countdownNum {
      font-family: 'Outfit', sans-serif;
      font-size: 20vw; font-weight: 900;
      color: white;
      text-shadow: 0 0 60px rgba(20,146,204,0.9), 0 0 120px rgba(20,146,204,0.5);
      opacity: 0;
      transform: scale(0.3);
      transition: none;
      line-height: 1;
      letter-spacing: -0.02em;
    }
    #countdownNum.pop-in {
      animation: countPop 0.85s cubic-bezier(0.34,1.56,0.64,1) forwards;
    }
    #countdownNum.go-style {
      font-size: 22vw;
      color: #FFD700;
      text-shadow: 0 0 80px rgba(255,215,0,0.9), 0 0 160px rgba(255,165,0,0.6);
    }
    @keyframes countPop {
      0%   { opacity:0; transform: scale(0.3) rotate(-8deg); }
      40%  { opacity:1; transform: scale(1.15) rotate(2deg); }
      65%  { opacity:1; transform: scale(0.95) rotate(0deg); }
      80%  { opacity:0.9; transform: scale(1.0); }
      100% { opacity:0; transform: scale(2.5); filter: blur(8px); }
    }

    #flashScreen {
      position: fixed; inset: 0; z-index: 9200;
      background: white; opacity: 0; pointer-events: none;
    }
    @keyframes whiteFlash {
      0%   { opacity: 0; }
      15%  { opacity: 1; }
      100% { opacity: 0; }
    }
    #flashScreen.flash { animation: whiteFlash 0.6s ease-out forwards; }
  @keyframes crownBurst {
  0%   { opacity: 0; transform: translate(-50%,-50%) translate(0,0) scale(0) rotate(-20deg); }
  30%  { opacity: 1; }
  70%  { opacity: 0.85; transform: translate(-50%,-50%) translate(var(--dx),var(--dy)) scale(1.2) rotate(10deg); }
  100% { opacity: 0; transform: translate(-50%,-50%) translate(calc(var(--dx)*1.3),calc(var(--dy)*1.5 - 20px)) scale(0.6) rotate(20deg); }
}

/* ── question-card の演出クラス ── */
.question-card.correct {
  border: 1.5px solid var(--green);
  background: var(--green-light);
  animation: glowGreen 0.55s ease forwards;
}
.question-card.wrong {
  border: 1.5px solid var(--red);
  background: var(--red-light);
  animation: glowRed 0.45s ease forwards, shake 0.45s ease forwards;
}

/* ── 王冠パーティクル ── */
.crown-particle {
  position: absolute;
  left: 50%; top: 50%;
  font-size: 16px;
  opacity: 0;
  pointer-events: none;
  animation: crownBurst 0.9s ease-out forwards;
}


/* ===== サブカテゴリ選択 ===== */
.sub-category-group { margin-bottom: 14px; }

.sub-category-group-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-sub);
  letter-spacing: 0.05em;
  margin-bottom: 6px;
  padding-left: 2px;
}

.sub-category-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.sub-check-label {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg);
  border: 1.5px solid #e2e8f0;
  border-radius: 8px;
  padding: 6px 12px;
  cursor: pointer;
  font-size: 0.82rem;
  color: var(--navy);
  transition: background 0.15s, border-color 0.15s;
}

.sub-check-label:has(.sub-check:checked) {
  background: var(--blue-light);
  border-color: var(--blue);
  color: var(--blue);
  font-weight: 600;
}

.sub-check {
  width: 15px;
  height: 15px;
  accent-color: var(--blue);
  cursor: pointer;
  flex-shrink: 0;
}

.sub-select-all-btn {
  font-size: 0.75rem;
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  color: var(--blue);
  background: var(--blue-light);
  border: 1.5px solid var(--blue);
  border-radius: 8px;
  padding: 4px 10px;
  cursor: pointer;
  transition: all 0.15s;
}
.sub-select-all-btn:hover { background: var(--blue); color: white; }

.sub-reset-btn {
  color: #e53e3e;
  border-color: #e53e3e;
  background: #fff5f5;
}
.sub-reset-btn:hover { background: #e53e3e; color: white; }


/* ─── 設定画面：学年・レベル表示カード（表示専用） ─── */
.ts-level-card {
  background: var(--navy);
  border-radius: 18px;
  padding: 16px 18px;
  margin-bottom: 6px;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}
.ts-level-card::before {
  content: '';
  position: absolute;
  top: -40px; right: -40px;
  width: 130px; height: 130px;
  border-radius: 50%;
  background: rgba(255,255,255,0.04);
  pointer-events: none;
}
.ts-level-card-inner {
  display: flex;
  align-items: center;
  gap: 14px;
}
.ts-level-left {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}
.ts-grade-label {
  font-family: 'Outfit', sans-serif;
  font-size: 0.78rem;
  font-weight: 800;
  color: rgba(255,255,255,0.7);
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.ts-level-badge-wrap {
  background: rgba(255,255,255,0.12);
  border-radius: 10px;
  padding: 6px 12px;
  text-align: center;
}
.ts-level-lv-label {
  font-family: 'Outfit', sans-serif;
  font-size: 0.55rem;
  font-weight: 700;
  color: rgba(255,255,255,0.5);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  display: block;
}
.ts-level-badge {
  font-family: 'Outfit', sans-serif;
  font-size: 1.6rem;
  font-weight: 900;
  color: #60a5fa;
  line-height: 1;
}
.ts-level-right {
  flex: 1;
  min-width: 0;
}
.ts-level-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: rgba(255,255,255,0.85);
  margin-bottom: 10px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.ts-bar-bg {
  background: rgba(255,255,255,0.12);
  border-radius: 99px;
  height: 6px;
  overflow: hidden;
  margin-bottom: 5px;
}
.ts-bar {
  height: 100%;
  border-radius: 99px;
  background: linear-gradient(90deg, #60a5fa, #a78bfa);
  transition: width 0.6s ease;
}
.ts-bar-label {
  font-size: 0.68rem;
  color: rgba(255,255,255,0.4);
}
.ts-grade-hint {
  font-size: 0.7rem;
  color: var(--text-sub);
  text-align: right;
  margin-bottom: 12px;
  padding-right: 2px;
}
.setting-group-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

/* ═══════════════════════════════════════
   クイズ画面 — モダン統一リスタイル
═══════════════════════════════════════ */

/* HUD（問題番号・スコア） */
.quiz-hud {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 12px;
}
.hud-card {
  background: var(--card);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1.5px solid rgba(20,146,204,0.09);
}
.hud-label {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--text-sub);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 2px;
}
.hud-value {
  font-family: 'Outfit', sans-serif;
  font-size: 1.3rem;
  font-weight: 900;
  color: var(--navy);
  line-height: 1.1;
}
.hud-value.blue { color: var(--blue); }

/* タイマーカード */
.timer-card {
  background: var(--card);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  margin-bottom: 12px;
  box-shadow: var(--shadow);
  border: 1.5px solid rgba(20,146,204,0.09);
}
.timer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}
.timer-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-sub);
  letter-spacing: 0.05em;
}
.timer-num {
  font-family: 'Outfit', sans-serif;
  font-size: 1rem;
  font-weight: 800;
  color: var(--navy);
}
.timer-bar-bg {
  background: #e2e8f0;
  border-radius: 99px;
  height: 8px;
  overflow: hidden;
}
.timer-bar {
  height: 100%;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--blue), #60a5fa);
  transition: width 0.9s linear, background 0.3s;
}
.timer-bar.danger {
  background: linear-gradient(90deg, var(--red), #ff8a80);
}

/* 問題カード */
.question-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 18px 18px 14px;
  margin-bottom: 10px;
  box-shadow: var(--shadow-lg);
  border: 1.5px solid rgba(20,146,204,0.09);
  position: relative;
  overflow: hidden;
  transition: border-color 0.2s, background 0.2s;
}
.jp-text {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
  line-height: 1.6;
}
.blank-text {
  font-family: 'Outfit', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.8;
  margin-bottom: 2px;
}
.blank-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--blue);
  color: white;
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
  font-size: 0.82rem;
  width: 22px; height: 22px;
  border-radius: 6px;
  margin: 0 2px;
  vertical-align: middle;
}

/* 入力カード */
.input-card {
  background: var(--card);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  margin-bottom: 8px;
  box-shadow: var(--shadow);
  border: 1.5px solid #e2e8f0;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: border-color 0.2s;
}
.input-card.correct { border-color: var(--green); background: var(--green-light); }
.input-card.wrong   { border-color: var(--red);   background: var(--red-light); }
.input-inner { flex: 1; }
.input-label {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--text-sub);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}
.input-field {
  width: 100%;
  border: none;
  background: transparent;
  font-family: 'Outfit', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--navy);
  outline: none;
  padding: 0;
}
.input-field::placeholder { color: #c0b8b5; font-weight: 500; }
.hint-btn {
  flex-shrink: 0;
  background: var(--yellow-light);
  border: 1.5px solid var(--yellow);
  border-radius: var(--radius-xs);
  padding: 8px 10px;
  font-size: 0.75rem;
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  color: #92400e;
  cursor: pointer;
  transition: all 0.15s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  line-height: 1.2;
}
.hint-btn:hover { background: var(--yellow); color: white; }
.hint-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.hint-count {
  font-size: 0.6rem;
  font-weight: 600;
  color: inherit;
  display: block;
}

/* フィードバックカード */
.feedback-card {
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-bottom: 8px;
  display: none;
  align-items: center;
  gap: 12px;
  border: 2px solid transparent;
}
.feedback-card.correct {
  background: var(--green-light);
  border-color: var(--green);
  display: flex;
}
.feedback-card.wrong {
  background: var(--red-light);
  border-color: var(--red);
  display: flex;
}
.feedback-emoji {
  font-size: 1.8rem;
  flex-shrink: 0;
  line-height: 1;
}
.feedback-text {
  font-family: 'Outfit', sans-serif;
  font-size: 1rem;
  font-weight: 800;
  color: var(--navy);
  line-height: 1.3;
}
.feedback-ans {
  font-size: 0.82rem;
  color: var(--text-sub);
  margin-top: 3px;
  font-weight: 600;
}
.graduated-badge {
  display: none;
  text-align: center;
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: white;
  font-family: 'Outfit', sans-serif;
  font-size: 0.85rem;
  font-weight: 800;
  border-radius: var(--radius-xs);
  padding: 6px 14px;
  margin-bottom: 8px;
  box-shadow: 0 2px 8px rgba(245,158,11,0.35);
}

/* 結果画面 */
.result-header {
  background: linear-gradient(135deg, var(--navy) 0%, #2d4a6e 100%);
  border-radius: var(--radius);
  padding: 24px 20px 20px;
  text-align: center;
  margin-bottom: 14px;
  box-shadow: var(--shadow-lg);
}
.result-emoji {
  font-size: 3.2rem;
  margin-bottom: 6px;
  display: block;
  animation: float 2s ease-in-out infinite;
}
.result-msg {
  font-family: 'Outfit', sans-serif;
  font-size: 1.4rem;
  font-weight: 900;
  color: white;
  margin-bottom: 6px;
}
.result-score {
  font-family: 'Outfit', sans-serif;
  font-size: 2.8rem;
  font-weight: 900;
  color: #fbbf24;
  line-height: 1;
  text-shadow: 0 2px 12px rgba(251,191,36,0.5);
}
.result-score-label {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.65);
  margin-top: 4px;
}
.result-stats {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 10px;
  margin-bottom: 14px;
}
.stat-card {
  background: var(--card);
  border-radius: var(--radius-sm);
  padding: 14px 10px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1.5px solid rgba(20,146,204,0.09);
}
.stat-value {
  font-family: 'Outfit', sans-serif;
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--blue);
  line-height: 1;
  margin-bottom: 4px;
}
.stat-label {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--text-sub);
  letter-spacing: 0.04em;
}
.review-section {
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 12px;
  box-shadow: var(--shadow);
}
.review-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1rem;
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1.5px solid #f1f5f9;
}
.review-item {
  background: var(--red-light);
  border-left: 4px solid var(--red);
  border-radius: var(--radius-xs);
  padding: 10px 12px;
  margin-bottom: 8px;
}
.review-jp {
  font-size: 0.85rem;
  color: var(--navy);
  font-weight: 600;
  margin-bottom: 4px;
  line-height: 1.5;
}
.review-ans {
  font-family: 'Outfit', sans-serif;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--green);
}
.review-all-correct {
  text-align: center;
  padding: 20px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--green);
  background: var(--green-light);
  border-radius: var(--radius-xs);
}

/* ── 次の問題ボタン ── */
#nextBtn {
  width: 100%;
  padding: 16px;
  border-radius: var(--radius);
  border: none;
  background: var(--blue);
  color: white;
  font-family: 'Outfit', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 4px 16px rgba(20,146,204,0.3);
  margin-top: 4px;
}
#nextBtn:hover { background: var(--blue-dark); }
#nextBtn:active { transform: scale(0.97); }

/* ═══════════════════════════════════════
   学習記録カード（ホーム画面）
═══════════════════════════════════════ */
.study-record-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 12px;
  box-shadow: var(--shadow);
  border: 1.5px solid rgba(20,146,204,0.12);
  cursor: pointer;
  transition: all 0.18s;
}
.study-record-card:hover { border-color: var(--blue); box-shadow: var(--shadow-lg); }
.study-record-card:active { transform: scale(0.98); }
.src-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.src-title-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.src-icon { font-size: 1.1rem; }
.src-title {
  font-family: 'Outfit', sans-serif;
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--navy);
}
.src-free-badge {
  font-size: 0.62rem;
  font-weight: 700;
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: white;
  border-radius: 99px;
  padding: 2px 8px;
}
.src-arrow { font-size: 1.2rem; color: var(--text-sub); }
.src-stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 10px;
}
.src-stat { text-align: center; }
.src-stat-val {
  font-family: 'Outfit', sans-serif;
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--blue);
  line-height: 1;
  margin-bottom: 3px;
}
.src-stat-label {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-sub);
  letter-spacing: 0.03em;
}
.src-bar-wrap { margin-bottom: 8px; }
.src-bar-bg {
  background: #e2e8f0;
  border-radius: 99px;
  height: 6px;
  overflow: hidden;
}
.src-bar {
  height: 100%;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--blue), #60a5fa);
  transition: width 0.6s ease;
}
.src-detail-hint {
  font-size: 0.68rem;
  color: var(--text-sub);
  text-align: center;
}

/* ═══════════════════════════════════════
   学習記録詳細モーダル
═══════════════════════════════════════ */
#studyRecordModal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.52);
  z-index: 1000;
  align-items: flex-end;
  justify-content: center;
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
}
#studyRecordModal.open {
  display: flex;
  animation: menuOverlayIn 0.25s ease;
}
.srm-sheet {
  background: var(--card);
  border-radius: 28px 28px 0 0;
  width: 100%;
  max-width: 480px;
  max-height: 88vh;
  overflow-y: auto;
  padding-bottom: env(safe-area-inset-bottom, 24px);
  animation: menuSheetIn 0.32s cubic-bezier(0.34,1.56,0.64,1);
  overscroll-behavior: contain;
}
.srm-handle {
  width: 44px; height: 5px;
  background: #ddd;
  border-radius: 99px;
  margin: 14px auto 0;
}
.srm-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px 12px;
  border-bottom: 1px solid #f1f5f9;
}
.srm-head-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1rem;
  font-weight: 800;
  color: var(--navy);
  flex: 1;
}
.srm-head-badge {
  font-size: 0.62rem;
  font-weight: 700;
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: white;
  border-radius: 99px;
  padding: 3px 10px;
  white-space: nowrap;
}
.srm-close {
  background: #f1f5f9;
  border: none;
  width: 32px; height: 32px;
  border-radius: 50%;
  font-size: 1rem;
  color: var(--text-sub);
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s;
}
.srm-close:hover { background: #e2e8f0; }
.srm-tabs {
  display: flex;
  gap: 6px;
  padding: 12px 20px 0;
}
.srm-tab {
  flex: 1;
  padding: 8px 4px;
  border: 2px solid #e2e8f0;
  border-radius: 10px;
  background: var(--bg);
  font-family: 'Outfit', sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-sub);
  cursor: pointer;
  transition: all 0.15s;
}
.srm-tab.active {
  border-color: var(--blue);
  background: var(--blue-light);
  color: var(--blue);
}
.srm-body { padding: 14px 20px 24px; }
.srm-section-label {
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--text-sub);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}
.srm-loading {
  text-align: center;
  padding: 24px;
  color: var(--text-sub);
  font-size: 0.85rem;
}
.srm-empty {
  text-align: center;
  padding: 20px;
  color: var(--text-sub);
  font-size: 0.85rem;
  background: var(--bg);
  border-radius: var(--radius-sm);
}
.srm-sub-row { margin-bottom: 12px; }
.srm-sub-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 4px;
}
.srm-sub-label {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--navy);
}
.srm-sub-stats {
  font-size: 0.72rem;
  color: var(--text-sub);
}
.srm-bar-bg {
  background: #e2e8f0;
  border-radius: 99px;
  height: 7px;
  overflow: hidden;
}
.srm-bar {
  height: 100%;
  border-radius: 99px;
  transition: width 0.5s ease;
}
.srm-wrong-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--red-light);
  border-left: 4px solid var(--red);
  border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
  padding: 10px 12px;
  margin-bottom: 8px;
  cursor: pointer;
  transition: all 0.15s;
}
.srm-wrong-item:hover { background: #fdd; }
.srm-wrong-rank {
  font-family: 'Outfit', sans-serif;
  font-size: 1rem;
  font-weight: 900;
  color: var(--red);
  width: 22px;
  text-align: center;
  flex-shrink: 0;
}
.srm-wrong-info { flex: 1; min-width: 0; }
.srm-wrong-jp {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.srm-wrong-ans {
  font-family: 'Outfit', sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--green);
}
.srm-wrong-sub {
  font-size: 0.65rem;
  color: var(--text-sub);
  margin-top: 2px;
}
.srm-wrong-count {
  font-family: 'Outfit', sans-serif;
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--red);
  flex-shrink: 0;
}