/**
 * ============================================================================
 * style.css - メインスタイルシート（ぜろ学習アプリケーション）
 * ============================================================================
 *
 * 【概要】
 * 「ぜろ」学習アプリケーション全体のデザインシステムを定義するメインCSSファイル。
 * 手書き風のノートブック的デザインとダークモード対応を実装しています。
 *
 * 【デザインコンセプト】
 * - 温かみのある手書き風デザイン（Klee One, Zen Kurenaido フォント）
 * - ノートブック的な背景（罫線、落書き装飾）
 * - 優しい色合いのカラーパレット（ベージュ、ブラウン系）
 * - カード要素の微妙な回転効果
 * - PWA対応（モバイルファースト）
 *
 * 【主要機能】
 * 1. テーマシステム: ライトモード・ダークモード対応（CSS変数）
 * 2. レスポンシブデザイン: デスクトップ/タブレット/モバイル
 * 3. コンポーネントスタイル: カード、ボタン、フォーム、モーダル
 * 4. 学習機能UI: 問題表示、選択肢、結果画面、進捗表示
 * 5. 英作文添削: エラー表示、改善提案、履歴管理
 * 6. アニメーション: ページ遷移、ボタンホバー、ローディング
 *
 * 【ブレークポイント】
 * - デスクトップ: 1024px以上
 * - タブレット: 768px - 1023px
 * - モバイル: 767px以下
 *
 * 【カラーシステム】
 * ライトモード:
 *   - 背景: ベージュ系グラデーション (#fef5e7, #fdebd0)
 *   - カード: オフホワイト (#fffef9)
 *   - ボーダー: ブラウン (#d4a574)
 *   - アクセント: レッド (#e74c3c)
 *
 * ダークモード:
 *   - 背景: ダークグレー系 (#1a1a2e, #16213e)
 *   - カード: ダークブルーグレー (#2a2a3e)
 *   - ボーダー: ゴールド (#d4a574)
 *   - アクセント: オレンジ (#e67e22)
 *
 * ============================================================================
 * 目次（主要セクション）
 * ============================================================================
 *
 * [1] グローバル設定・CSS変数 (line 1-88)
 *     - タッチ操作設定
 *     - :root CSS変数（ライトモード）
 *     - [data-theme="dark"] CSS変数（ダークモード）
 *
 * [2] 基本要素・レイアウト (line 89-250)
 *     - body, html - 基本スタイル
 *     - .notebook - メインコンテナ
 *     - .container - コンテンツ領域
 *     - .main-content - メインコンテンツ
 *     - .right-sidebar - 右サイドバー
 *
 * [3] サイドバー (line 251-494)
 *     - .sidebar-toggle - トグルボタン
 *     - .sidebar - サイドバー本体
 *     - .sidebar-content - サイドバーコンテンツ
 *     - PWA対応・固定配置
 *
 * [4] 装飾要素 (line 495-600)
 *     - .doodle-bg - 落書き背景
 *     - .scribble - 手書き線
 *     - アニメーション定義
 *
 * [5] カードコンポーネント (line 601-900)
 *     - .card - 基本カード
 *     - .subject-card - 科目カード
 *     - .category-card - カテゴリーカード
 *     - .level-card - レベルカード
 *
 * [6] ボタン (line 901-1200)
 *     - .btn, .login-btn - 基本ボタン
 *     - .choice-btn - 選択肢ボタン
 *     - .next-btn - 次へボタン
 *     - .back-btn - 戻るボタン
 *
 * [7] フォーム要素 (line 1201-1450)
 *     - input, textarea - 入力欄
 *     - .input-group - 入力グループ
 *     - .info-box - 情報ボックス
 *
 * [8] 学習画面 (line 1451-1800)
 *     - .question-area - 問題表示エリア
 *     - .choices - 選択肢コンテナ
 *     - .result - 結果表示
 *     - .stats - 統計表示
 *
 * [9] 英語メニュー (line 1537-1700)
 *     - .english-menu - 英語メニュー
 *     - .category-grid - カテゴリーグリッド
 *
 * [10] 長文・リスニング (line 1701-2200)
 *      - .passage-container - 長文コンテナ
 *      - .passage-text - 本文表示
 *      - .audio-player - 音声プレーヤー
 *
 * [11] プロフィール・管理画面 (line 2201-2713)
 *      - .profile-container - プロフィール
 *      - .admin-dashboard - 管理画面
 *      - .question-management - 問題管理
 *
 * [12] 誤文訂正 (line 2714-2751)
 *      - .error-correction-span - 誤文下線
 *      - .error-label-subscript - ラベル表示
 *
 * [13] 英作文添削システム (line 2752-3640)
 *      - .composition-container - 添削コンテナ
 *      - .error-analysis - エラー分析
 *      - .suggestion-card - 改善提案
 *      - .history-panel - 履歴パネル
 *
 * [14] PCモード最適化 (line 3641-3686)
 *      - デスクトップ用レイアウト調整
 *
 * [15] 統一サイドバー (line 3687-3794)
 *      - .unified-sidebar - 統一サイドバー
 *      - レスポンシブ対応
 *
 * ============================================================================
 */

* {
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

/* サイドバートグルボタンはタッチ操作を許可 */
.sidebar-toggle {
    touch-action: none !important; /* PWA対応: グローバル設定を上書き */
}

:root {
    /* ライトモード */
    --bg-gradient-1: #fef5e7;
    --bg-gradient-2: #fdebd0;
    --notebook-line: #e8d5c4;
    --card-bg: #fffef9;
    --card-border: #d4a574;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-accent: #e74c3c;
    --button-bg: #fff9e6;
    --button-border: #34495e;
    --button-secondary-bg: #e8f4f8;
    --button-secondary-border: #3498db;
    --input-bg: #fff;
    --shadow-color: rgba(0,0,0,0.1);
    --doodle-color: #d4a574;
    --doodle-opacity: 0.15;
    --success-bg: #d4edda;
    --success-border: #27ae60;
    --error-bg: #f8d7da;
    --error-border: #e74c3c;
    --warning-bg: #fff5f5;
    --neutral-bg: #ecf0f1;
    --neutral-border: #7f8c8d;
    --locked-bg: #f5f5f5;
    --detail-bg: #f9f9f9;
    --detail-border: #e0e0e0;
    /* エラーカテゴリー（英作文添削） */
    --error-cat-f-bg: #ffebee;
    --error-cat-f-text: #c62828;
    --error-cat-n-bg: #fff9c4;
    --error-cat-n-text: #f57f17;
    --error-cat-m-bg: #f3e5f5;
    --error-cat-m-text: #7b1fa2;
    --error-cat-w-bg: #e3f2fd;
    --error-cat-w-text: #1565c0;
}

[data-theme="dark"] {
    /* ダークモード - 目に優しい低コントラスト配色 */
    --bg-gradient-1: #2a2a3a;
    --bg-gradient-2: #35354a;
    --notebook-line: #3f3f52;
    --card-bg: #38384d;
    --card-border: #4f4f68;
    --text-primary: #c8c8d8;
    --text-secondary: #9898b0;
    --text-accent: #d89090;
    --button-bg: #42425a;
    --button-border: #5a5a75;
    --button-secondary-bg: #3a4a5a;
    --button-secondary-border: #5a7a9a;
    --input-bg: #32324a;
    --shadow-color: rgba(0,0,0,0.3);
    --doodle-color: #4f4f68;
    --doodle-opacity: 0.08;
    --success-bg: #3a4a3a;
    --success-border: #5a7a5a;
    --error-bg: #4a3a3a;
    --error-border: #7a5a5a;
    --warning-bg: #4a3a3a;
    --neutral-bg: #3a3a4a;
    --neutral-border: #5a5a6a;
    --locked-bg: #3a3a4a;
    --detail-bg: #35354a;
    --detail-border: #4a4a5a;
    /* エラーカテゴリー（英作文添削） - ダークモード用低コントラスト */
    --error-cat-f-bg: #4a3a3a;
    --error-cat-f-text: #d89090;
    --error-cat-n-bg: #4a4a3a;
    --error-cat-n-text: #d8c890;
    --error-cat-m-bg: #453a4a;
    --error-cat-m-text: #c898d8;
    --error-cat-w-bg: #3a4a5a;
    --error-cat-w-text: #90b8d8;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Klee One', cursive;
    background: linear-gradient(135deg, var(--bg-gradient-1) 0%, var(--bg-gradient-2) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    transition: background 0.3s ease, color 0.3s ease;
}

.notebook {
    background: repeating-linear-gradient(
        transparent,
        transparent 31px,
        var(--notebook-line) 31px,
        var(--notebook-line) 32px
    );
    padding: 10px;
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

/* タブレット・モバイル対応 */
@media (max-width: 1024px) {
    .container {
        max-width: 100%;
        padding: 0 15px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 10px;
    }
}

.main-content {
    flex: 1;
    min-width: 0;
}


h1 {
    text-align: center;
    font-size: 32px;
    margin: 15px 0 10px 0;
    color: var(--text-primary);
    font-family: 'Zen Kurenaido', sans-serif;
    transform: rotate(-0.3deg);
    text-shadow: 2px 2px 4px var(--shadow-color);
    line-height: 1.2;
}

.subtitle {
    text-align: center;
    font-size: 17px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    transform: rotate(0.2deg);
}

.subject-select {
    text-align: center;
}

.subject-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    margin-top: 20px;
    padding: 0;
    justify-content: center;
}

/* 全デバイスで1カラムの縦並び（統一） */
@media (min-width: 1024px) {
    .subject-grid {
        grid-template-columns: 1fr;
        max-width: 800px;
        margin-left: auto;
        margin-right: auto;
    }
}

@media (min-width: 768px) and (max-width: 1023px) {
    .subject-grid {
        grid-template-columns: 1fr;
        max-width: 650px;
        margin-left: auto;
        margin-right: auto;
    }
}

@media (max-width: 767px) {
    .subject-grid {
        grid-template-columns: 1fr;
        max-width: 380px;
        margin-left: auto;
        margin-right: auto;
    }
}

.subject-card {
    background: var(--card-bg);
    padding: 40px 15px;
    border: 3px solid var(--button-border);
    cursor: pointer;
    transform: rotate(0deg);
    box-shadow: 4px 4px 0px var(--button-border);
    transition: all 0.2s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    user-select: none;
    -webkit-user-select: none;
    position: relative;
    overflow: hidden;
    min-height: 140px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.subject-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s;
}

.subject-card:nth-child(2) {
    transform: rotate(0deg);
}

.subject-card:nth-child(3) {
    transform: rotate(0deg);
}

.subject-card:nth-child(4) {
    transform: rotate(0deg);
}

/* 実験用カードスタイル */
.experimental-card {
    position: relative;
    background: linear-gradient(135deg, var(--card-bg) 0%, #fff3e0 100%);
    border: 3px dashed var(--accent-color) !important;
    overflow: visible;
}

.experimental-card .experimental-badge {
    position: absolute;
    top: -10px;
    right: -10px;
    background: var(--accent-color);
    color: white;
    padding: 5px 10px;
    border-radius: 15px;
    font-size: 11px;
    font-weight: 600;
    animation: experimentalPulse 2s infinite;
    transform: rotate(15deg);
    z-index: 10;
    border: 2px solid white;
    box-shadow: 2px 2px 0px rgba(0,0,0,0.2);
}

@keyframes experimentalPulse {
    0%, 100% {
        transform: rotate(15deg) scale(1);
        box-shadow: 2px 2px 0px rgba(0,0,0,0.2);
    }
    50% {
        transform: rotate(15deg) scale(1.1);
        box-shadow: 3px 3px 0px rgba(0,0,0,0.3);
    }
}

.experimental-card:nth-child(5) {
    transform: rotate(0.1deg);
}

.experimental-card:hover {
    background: linear-gradient(135deg, #fff8f0 0%, #ffe0cc 100%);
    border-color: #ff7043 !important;
}

.experimental-card:active {
    transform: rotate(0.1deg) translate(2px, 2px) scale(0.98);
}

.experimental-card:hover .experimental-badge {
    background: #ff7043;
    transform: rotate(15deg) scale(1.2);
}

.subject-card:active {
    transform: rotate(-0.3deg) translate(2px, 2px) scale(0.98);
    box-shadow: 2px 2px 0px var(--button-border);
}

.subject-card:active::after {
    opacity: 1;
}

.subject-card:nth-child(2):active {
    transform: rotate(0.3deg) translate(2px, 2px) scale(0.98);
}

.subject-card:nth-child(3):active {
    transform: rotate(0.2deg) translate(2px, 2px) scale(0.98);
}

.subject-card:nth-child(4):active {
    transform: rotate(-0.2deg) translate(2px, 2px) scale(0.98);
}

.subject-icon {
    font-size: 48px;
    font-weight: bold;
    margin-bottom: 10px;
    color: var(--text-primary);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.subject-name {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
}

.study-area {
    position: relative;
}

.back-btn {
    padding: 12px 20px;
    font-size: 16px;
    margin-bottom: 15px;
    background: var(--neutral-bg);
    border: 2px solid var(--neutral-border);
    box-shadow: 2px 2px 0px var(--neutral-border);
    transform: rotate(-0.2deg);
    width: 100%;
}

.back-btn:active {
    transform: rotate(-0.2deg) translate(1px, 1px);
    box-shadow: 1px 1px 0px var(--neutral-border);
}

.card {
    background: var(--card-bg);
    padding: 40px 20px;
    margin-bottom: 20px;
    border: 2px solid var(--card-border);
    box-shadow:
        3px 3px 0px var(--shadow-color),
        6px 6px 0px var(--shadow-color);
    position: relative;
    border-radius: 3px;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    animation: cardAppear 0.5s ease-out;
    overflow: visible;
}

@keyframes cardAppear {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card::before {
    content: '';
    position: absolute;
    top: 15px;
    left: 15px;
    right: 15px;
    bottom: 15px;
    border: 1px dashed var(--card-border);
    opacity: 0.3;
    pointer-events: none;
}

.underline {
    height: 2px;
    background: repeating-linear-gradient(
        90deg,
        var(--button-secondary-border),
        var(--button-secondary-border) 5px,
        transparent 5px,
        transparent 10px
    );
    margin: 15px auto;
    width: 80%;
    opacity: 0.4;
}

.question {
    font-size: 28px;
    font-weight: 600;
    margin: 20px 0;
    color: var(--text-primary);
    text-align: center;
    transform: rotate(-0.3deg);
    letter-spacing: 0.5px;
    text-shadow: 1px 1px 2px var(--shadow-color);
    word-break: break-word;
    line-height: 1.5;
    overflow-wrap: break-word;
    hyphens: auto;
    max-width: 100%;
}

.answer {
    font-size: 26px;
    margin: 25px 0;
    color: var(--text-accent);
    text-align: center;
    font-family: 'Zen Kurenaido', sans-serif;
    transform: rotate(0.3deg);
    word-break: break-word;
    line-height: 1.4;
}

.doodle {
    position: absolute;
    bottom: 10px;
    right: 15px;
    font-size: 28px;
    opacity: 0.3;
    transform: rotate(8deg);
}

.doodle-bg {
    position: fixed;
    font-size: 24px;
    color: var(--doodle-color);
    opacity: var(--doodle-opacity);
    pointer-events: none;
    z-index: 0;
}

.doodle-star {
    top: 10%;
    left: 5%;
    transform: rotate(-15deg);
    font-size: 28px;
}

.doodle-heart {
    top: 25%;
    right: 8%;
    transform: rotate(20deg);
    font-size: 22px;
}

.doodle-note {
    top: 45%;
    left: 3%;
    transform: rotate(-10deg);
    font-size: 26px;
}

.doodle-smile {
    top: 60%;
    right: 5%;
    transform: rotate(15deg);
    font-size: 30px;
}

.doodle-check {
    top: 15%;
    right: 25%;
    transform: rotate(-20deg);
    font-size: 24px;
}

.doodle-arrow {
    top: 70%;
    left: 10%;
    transform: rotate(45deg);
    font-size: 20px;
}

.doodle-circle {
    top: 35%;
    right: 15%;
    transform: rotate(0deg);
    font-size: 32px;
}

.doodle-flower {
    top: 80%;
    right: 20%;
    transform: rotate(-25deg);
    font-size: 26px;
    animation: spin 20s linear infinite;
}

.doodle-sun {
    top: 5%;
    right: 30%;
    transform: rotate(10deg);
    font-size: 28px;
    animation: float 6s ease-in-out infinite, pulse 3s ease-in-out infinite;
}

.doodle-cloud {
    top: 50%;
    left: 15%;
    transform: rotate(-5deg);
    font-size: 24px;
    animation: float 8s ease-in-out infinite;
}

.doodle-pencil {
    top: 90%;
    left: 25%;
    transform: rotate(45deg);
    font-size: 22px;
    animation: wiggle 4s ease-in-out infinite;
}

.doodle-book {
    top: 40%;
    right: 30%;
    transform: rotate(-15deg);
    font-size: 20px;
    animation: tilt 5s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(10deg);
    }
    50% {
        transform: translateY(-10px) rotate(10deg);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.15;
    }
    50% {
        opacity: 0.25;
    }
}

@keyframes wiggle {
    0%, 100% {
        transform: rotate(45deg);
    }
    25% {
        transform: rotate(40deg);
    }
    75% {
        transform: rotate(50deg);
    }
}

@keyframes tilt {
    0%, 100% {
        transform: rotate(-15deg);
    }
    50% {
        transform: rotate(-10deg);
    }
}

@keyframes spin {
    0% {
        transform: rotate(-25deg);
    }
    100% {
        transform: rotate(335deg);
    }
}

.scribble {
    position: fixed;
    border: 2px solid var(--doodle-color);
    border-radius: 50%;
    opacity: var(--doodle-opacity);
    pointer-events: none;
    z-index: 0;
}

.scribble-1 {
    width: 80px;
    height: 80px;
    top: 20%;
    left: 10%;
    transform: rotate(25deg);
    border-style: dashed;
    animation: breathe 4s ease-in-out infinite;
}

.scribble-2 {
    width: 60px;
    height: 60px;
    top: 65%;
    right: 12%;
    transform: rotate(-30deg);
    border-style: dotted;
    animation: breathe 5s ease-in-out infinite;
}

.scribble-3 {
    width: 100px;
    height: 50px;
    top: 85%;
    left: 40%;
    transform: rotate(15deg);
    border-radius: 50%;
    animation: breathe 6s ease-in-out infinite;
}

@keyframes breathe {
    0%, 100% {
        opacity: 0.08;
        transform: scale(1);
    }
    50% {
        opacity: 0.15;
        transform: scale(1.05);
    }
}

.doodle-rocket {
    top: 12%;
    left: 20%;
    transform: rotate(-30deg);
    font-size: 24px;
    animation: rocket 8s ease-in-out infinite;
}

.doodle-light {
    top: 55%;
    right: 5%;
    transform: rotate(15deg);
    font-size: 26px;
    animation: blink 2s ease-in-out infinite;
}

.doodle-trophy {
    top: 75%;
    left: 8%;
    transform: rotate(-10deg);
    font-size: 22px;
    animation: bounce-trophy 3s ease-in-out infinite;
}

@keyframes rocket {
    0%, 100% {
        transform: rotate(-30deg) translateY(0);
    }
    50% {
        transform: rotate(-25deg) translateY(-15px);
    }
}

@keyframes blink {
    0%, 100% {
        opacity: 0.15;
    }
    50% {
        opacity: 0.3;
    }
}

@keyframes bounce-trophy {
    0%, 100% {
        transform: rotate(-10deg) translateY(0);
    }
    50% {
        transform: rotate(-10deg) translateY(-8px);
    }
}

.doodle-line {
    position: fixed;
    pointer-events: none;
    z-index: 0;
}

.doodle-line-1 {
    top: 30%;
    right: 15%;
    animation: draw 10s ease-in-out infinite;
}

.doodle-line-2 {
    top: 70%;
    left: 35%;
    animation: rotate-slow 15s linear infinite;
}

@keyframes draw {
    0%, 100% {
        opacity: 0.05;
    }
    50% {
        opacity: 0.15;
    }
}

@keyframes rotate-slow {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.container {
    position: relative;
    z-index: 1;
}

.login-container {
    max-width: 450px;
    margin: 0 auto;
    padding: 20px 10px;
}

.login-card {
    background: var(--card-bg);
    padding: 40px 30px;
    border: 2px solid var(--card-border);
    box-shadow: 
        3px 3px 0px var(--shadow-color),
        6px 6px 0px var(--shadow-color);
    transform: rotate(-0.3deg);
    border-radius: 8px;
    margin-top: 20px;
}

.login-icon {
    font-size: 64px;
    text-align: center;
    margin-bottom: 20px;
}

.feature-icon {
    font-size: 32px;
    font-weight: bold;
    color: var(--text-primary);
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    transform: rotate(-0.2deg);
}

.input-group input {
    width: 100%;
    padding: 14px;
    font-size: 16px;
    font-family: 'Klee One', cursive;
    border: 2px solid var(--button-border);
    border-radius: 4px;
    background: var(--input-bg);
    color: var(--text-primary);
    box-sizing: border-box;
    transform: rotate(-0.1deg);
    transition: all 0.2s;
}

.input-group input:focus {
    outline: none;
    border-color: var(--button-secondary-border);
    box-shadow: 0 0 0 3px var(--shadow-color);
    transform: rotate(0deg) scale(1.01);
}

.login-btn {
    width: 100%;
    padding: 16px;
    font-size: 18px;
    font-weight: 600;
    background: var(--button-secondary-bg);
    color: var(--text-primary);
    border: 3px solid var(--button-secondary-border);
    box-shadow: 3px 3px 0px var(--button-secondary-border);
    transform: rotate(-0.2deg);
    margin-top: 10px;
}

.login-btn:active {
    transform: rotate(-0.2deg) translate(2px, 2px);
    box-shadow: 1px 1px 0px var(--button-secondary-border);
}

.divider {
    text-align: center;
    margin: 25px 0;
    position: relative;
}

.divider::before,
.divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 40%;
    height: 1px;
    background: var(--card-border);
}

.divider::before {
    left: 0;
}

.divider::after {
    right: 0;
}

.divider span {
    background: var(--card-bg);
    padding: 0 15px;
    color: var(--text-secondary);
    font-size: 14px;
}

.guest-btn {
    width: 100%;
    padding: 14px;
    font-size: 16px;
    background: var(--neutral-bg);
    color: var(--text-primary);
    border: 2px solid var(--neutral-border);
    box-shadow: 2px 2px 0px var(--neutral-border);
    transform: rotate(0.2deg);
}

.guest-btn:active {
    transform: rotate(0.2deg) translate(2px, 2px);
    box-shadow: 1px 1px 0px var(--neutral-border);
}

.form-description {
    text-align: center;
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.form-links {
    text-align: center;
    margin-top: 20px;
}

.link-btn {
    width: 100%;
    padding: 14px 20px;
    font-size: 15px;
    color: var(--text-primary);
    background: var(--neutral-bg);
    border: 2px solid var(--neutral-border);
    box-shadow: 2px 2px 0px var(--neutral-border);
    transform: rotate(-0.1deg);
    transition: all 0.2s;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    font-family: 'Klee One', cursive;
    min-height: auto;
}

.link-btn:hover {
    transform: rotate(-0.1deg) translate(-1px, -1px);
    box-shadow: 3px 3px 0px var(--neutral-border);
}

.link-btn:active {
    transform: rotate(-0.1deg) translate(1px, 1px);
    box-shadow: 1px 1px 0px var(--neutral-border);
}

.link-btn::before {
    display: none;
}

.passkey-info {
    margin-top: 20px;
    padding: 15px;
    background: var(--detail-bg);
    border: 2px dashed var(--detail-border);
    border-radius: 8px;
    transform: rotate(-0.1deg);
}

.passkey-info p {
    margin: 0 0 8px 0;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.passkey-info small {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.info-box {
    padding: 15px;
    background: var(--detail-bg);
    border: 2px solid var(--detail-border);
    border-radius: 8px;
    margin-bottom: 20px;
    transform: rotate(-0.1deg);
    text-align: center;
}

.info-box p {
    margin: 5px 0;
    font-size: 14px;
}

.info-box strong {
    color: var(--text-primary);
    font-weight: 600;
}

.info-box small {
    color: var(--text-secondary);
    font-size: 12px;
}

.note {
    text-align: center;
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 20px;
    transform: rotate(-0.1deg);
}

.features {
    display: flex;
    justify-content: space-around;
    margin-top: 30px;
    padding: 20px;
    background: var(--button-bg);
    border: 2px dashed var(--card-border);
    border-radius: 8px;
    transform: rotate(0.2deg);
}

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

.feature-icon {
    font-size: 32px;
}

.feature-text {
    font-size: 14px;
    color: var(--text-primary);
    font-weight: 600;
}

@media (max-width: 600px) {
    .login-card {
        padding: 30px 20px;
    }
    
    .features {
        flex-direction: column;
        gap: 15px;
    }
    
    .feature-item {
        flex-direction: row;
        justify-content: center;
    }
}

.speak-area {
    text-align: center;
    margin-bottom: 20px;
}

.speak-area button {
    padding: 12px 24px;
    font-size: 16px;
    background: var(--button-secondary-bg);
    border-color: var(--button-secondary-border);
    box-shadow: 3px 3px 0px var(--button-secondary-border);
}

.choices {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 20px;
    position: relative;
    z-index: 2;
}

.choice-btn {
    padding: 16px 18px;
    font-size: 16px;
    text-align: left;
    background: var(--button-bg) !important;
    color: var(--text-primary);
    border: 3px solid var(--button-border) !important;
    cursor: pointer;
    transform: rotate(0deg) !important;
    box-shadow: 3px 3px 0px var(--button-border) !important;
    transition: all 0.2s;
    font-weight: 600;
    width: 100%;
    min-height: 60px;
    word-break: break-word;
    line-height: 1.6;
    overflow-wrap: break-word;
    hyphens: auto;
    display: flex;
    align-items: center;
    position: relative;
    z-index: 3;
}


.choice-btn:active:not(:disabled) {
    transform: translate(2px, 2px) rotate(0deg);
    box-shadow: 1px 1px 0px var(--button-border);
}

.choice-btn:hover:not(:disabled) {
    transform: rotate(0deg) scale(1.02);
    box-shadow: 4px 4px 0px var(--button-border);
}


.choice-btn.correct {
    background: var(--success-bg) !important;
    border-color: var(--success-border) !important;
    box-shadow: 3px 3px 0px var(--success-border) !important;
}

.choice-btn.wrong {
    background: var(--error-bg) !important;
    border-color: var(--error-border) !important;
    box-shadow: 3px 3px 0px var(--error-border) !important;
}

.choice-btn.selected {
    background: #e3f2fd !important;
    border-color: #2196f3 !important;
    box-shadow: 3px 3px 0px #2196f3 !important;
    transform: scale(0.98) !important;
}

[data-theme="dark"] .choice-btn.selected {
    background: #1565c0 !important;
    border-color: #1976d2 !important;
    box-shadow: 3px 3px 0px #1976d2 !important;
}

.choice-btn:disabled {
    cursor: not-allowed;
    opacity: 0.8;
}

.result {
    text-align: center;
    padding: 20px;
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    border-radius: 8px;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.result-text {
    font-size: 28px;
    font-weight: bold;
    margin: 10px 0;
    animation: popIn 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@keyframes popIn {
    0% {
        transform: scale(0);
        opacity: 0;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.correct-answer {
    font-size: 20px;
    color: var(--text-primary);
    margin: 10px 0;
}

.next-btn {
    padding: 14px 28px;
    font-size: 18px;
    background: var(--button-secondary-bg);
    border-color: var(--button-secondary-border);
    box-shadow: 3px 3px 0px var(--button-secondary-border);
    margin-top: 15px;
}

.stats {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 10px;
    padding: 15px;
    background: var(--button-bg);
    border: 2px dashed var(--card-border);
    border-radius: 8px;
}

.stat {
    font-size: 16px;
    color: var(--text-primary);
    margin: 0;
}

.stat span {
    font-weight: bold;
    color: var(--text-accent);
    font-size: 20px;
}

.english-menu {
    text-align: center;
}

.category-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    margin-top: 20px;
    padding: 0;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    justify-content: center;
}

/* 全デバイスで1カラムの縦並び */
@media (min-width: 1024px) {
    .category-grid {
        grid-template-columns: 1fr;
        max-width: 800px;
    }
}

@media (min-width: 768px) and (max-width: 1023px) {
    .category-grid {
        grid-template-columns: 1fr;
        max-width: 650px;
    }
}

@media (max-width: 767px) {
    .category-grid {
        grid-template-columns: 1fr;
        max-width: 380px;
        margin-left: auto;
        margin-right: auto;
    }
}

.category-card {
    background: var(--button-bg);
    padding: 40px 15px;
    border: 3px solid var(--button-secondary-border);
    cursor: pointer;
    transform: rotate(0deg);
    box-shadow: 4px 4px 0px var(--button-secondary-border);
    transition: all 0.2s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    user-select: none;
    -webkit-user-select: none;
    position: relative;
    overflow: hidden;
    min-height: 140px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.category-card:nth-child(2) {
    transform: rotate(0deg);
}

.category-card:nth-child(3) {
    transform: rotate(0deg);
}

.category-card:nth-child(4) {
    transform: rotate(0deg);
}

.category-card:nth-child(5) {
    transform: rotate(0deg);
}

.category-card:active {
    transform: rotate(0deg) translate(2px, 2px) scale(0.98);
    box-shadow: 2px 2px 0px var(--button-secondary-border);
}

.category-card:nth-child(2):active {
    transform: rotate(0deg) translate(2px, 2px) scale(0.98);
}

.category-card:nth-child(3):active {
    transform: rotate(0deg) translate(2px, 2px) scale(0.98);
}

.category-card:nth-child(4):active {
    transform: rotate(-0.2deg) translate(2px, 2px) scale(0.98);
}

.category-card:nth-child(5):active {
    transform: rotate(0.25deg) translate(2px, 2px) scale(0.98);
}

.category-icon {
    font-size: 42px;
    margin-bottom: 10px;
    font-weight: bold;
    color: var(--text-primary);
    font-family: 'Klee One', cursive;
    letter-spacing: 2px;
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.category-name {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
}

.category-detail {
    text-align: center;
}

.level-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    margin-top: 20px;
    padding: 0;
    justify-content: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* 全デバイスで1カラムの縦並び（統一） */
@media (min-width: 1024px) {
    .level-grid {
        grid-template-columns: 1fr;
        max-width: 800px;
    }
}

@media (min-width: 768px) and (max-width: 1023px) {
    .level-grid {
        grid-template-columns: 1fr;
        max-width: 650px;
    }
}

@media (max-width: 767px) {
    .level-grid {
        grid-template-columns: 1fr;
        max-width: 380px;
        margin-left: auto;
        margin-right: auto;
    }
}

.level-card {
    background: var(--card-bg);
    padding: 20px 10px;
    border: 3px solid var(--card-border);
    cursor: pointer;
    transform: rotate(0deg);
    box-shadow: 4px 4px 0px var(--card-border);
    transition: all 0.2s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    user-select: none;
    -webkit-user-select: none;
    position: relative;
    overflow: visible;
    min-height: 100px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border-radius: 8px;
    word-break: keep-all;
    gap: 5px;
}

.level-card:nth-child(2n) {
    transform: rotate(0deg);
}

.level-card:active {
    transform: rotate(0deg) translate(2px, 2px) scale(0.98);
    box-shadow: 2px 2px 0px var(--card-border);
}

.level-card:nth-child(2n):active {
    transform: rotate(0deg) translate(2px, 2px) scale(0.98);
}

.level-icon {
    font-size: 26px;
    margin: 0;
    font-weight: bold;
    color: var(--text-primary);
    letter-spacing: 1px;
    line-height: 1.4;
    text-align: center;
    word-break: keep-all;
    max-width: 100%;
    padding: 0 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
}

.level-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.5px;
    text-align: center;
    word-break: keep-all;
    line-height: 1.5;
    max-width: 100%;
    padding: 0 8px;
}

@media (min-width: 600px) {
    .level-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }
    
    .level-card {
        padding: 25px 15px;
        min-height: 120px;
        gap: 8px;
    }
    
    .level-card:hover {
        transform: rotate(0deg) translate(-2px, -2px);
        box-shadow: 6px 6px 0px var(--card-border);
    }

    .level-card:nth-child(2n):hover {
        transform: rotate(0deg) translate(-2px, -2px);
    }
    
    .level-icon {
        font-size: 32px;
        letter-spacing: 2px;
        min-height: 45px;
        padding: 0 10px;
    }
    
    .level-name {
        font-size: 17px;
        letter-spacing: 1px;
        padding: 0 10px;
    }
}

.user-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background: var(--button-bg);
    border: 2px solid var(--card-border);
    border-radius: 8px;
    margin-bottom: 20px;
    transform: rotate(-0.2deg);
}

.welcome-text {
    font-size: 18px;
    color: var(--text-primary);
    margin: 0;
}

.welcome-text span {
    font-weight: bold;
    color: var(--text-accent);
}

.logout-btn {
    padding: 8px 16px;
    font-size: 14px;
    background: var(--neutral-bg);
    border: 2px solid var(--neutral-border);
    box-shadow: 2px 2px 0px var(--neutral-border);
    transform: rotate(0.2deg);
}

.logout-btn:active {
    transform: rotate(0.2deg) translate(1px, 1px);
    box-shadow: 1px 1px 0px var(--neutral-border);
}

.user-actions {
    display: flex;
    gap: 10px;
}

.profile-btn {
    padding: 8px 16px;
    font-size: 14px;
    background: var(--button-secondary-bg);
    border: 2px solid var(--button-secondary-border);
    box-shadow: 2px 2px 0px var(--button-secondary-border);
    transform: rotate(-0.2deg);
}

.profile-btn:active {
    transform: rotate(-0.2deg) translate(1px, 1px);
    box-shadow: 1px 1px 0px var(--button-secondary-border);
}

.profile-container {
    max-width: 700px;
    margin: 0 auto;
    padding: 20px 10px;
}

.profile-card {
    background: var(--card-bg);
    padding: 30px;
    border: 2px solid var(--card-border);
    box-shadow: 3px 3px 0px var(--shadow-color);
    transform: rotate(-0.2deg);
    border-radius: 8px;
    margin-bottom: 20px;
}

.profile-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px dashed var(--card-border);
}

.avatar {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--button-secondary-bg), var(--button-secondary-border));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    font-weight: bold;
    color: white;
    border: 3px solid var(--button-border);
    box-shadow: 3px 3px 0px var(--button-border);
}

.profile-info h2 {
    margin: 0 0 5px 0;
    font-size: 28px;
    color: var(--text-primary);
}

.join-date {
    margin: 0;
    font-size: 14px;
    color: var(--text-secondary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.stat-card {
    background: var(--button-bg);
    padding: 20px;
    border: 2px solid var(--card-border);
    border-radius: 8px;
    text-align: center;
    transform: rotate(-0.1deg);
}

.stat-card:nth-child(2) {
    transform: rotate(0.1deg);
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.stat-value {
    font-size: 32px;
    font-weight: bold;
    color: var(--text-accent);
}

.progress-section,
.achievements-section {
    background: var(--card-bg);
    padding: 25px;
    border: 2px solid var(--card-border);
    border-radius: 8px;
    margin-bottom: 20px;
    transform: rotate(0.1deg);
}

.progress-section h3,
.achievements-section h3 {
    margin: 0 0 20px 0;
    font-size: 22px;
    color: var(--text-primary);
}

.progress-item {
    margin-bottom: 20px;
}

.progress-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
}

.progress-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.progress-rate {
    font-size: 16px;
    font-weight: bold;
    color: var(--text-accent);
}

.progress-bar {
    height: 12px;
    background: var(--neutral-bg);
    border-radius: 6px;
    overflow: hidden;
    border: 1px solid var(--neutral-border);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--button-secondary-bg), var(--button-secondary-border));
    transition: width 0.5s ease;
}

.progress-detail {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 5px;
}

.achievements-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.achievement-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: var(--button-bg);
    border: 2px solid var(--card-border);
    border-radius: 8px;
    transform: rotate(-0.1deg);
}

.achievement-item.locked {
    opacity: 0.5;
    background: var(--locked-bg);
}

.achievement-icon {
    font-size: 32px;
    min-width: 40px;
    text-align: center;
}

.achievement-name {
    font-size: 16px;
    font-weight: bold;
    color: var(--text-primary);
}

.achievement-desc {
    font-size: 14px;
    color: var(--text-secondary);
}

.danger-zone {
    background: var(--warning-bg);
    padding: 25px;
    border: 2px solid var(--error-border);
    border-radius: 8px;
    transform: rotate(-0.1deg);
}

.danger-zone h3 {
    margin: 0 0 15px 0;
    font-size: 20px;
    color: var(--text-accent);
}

.reset-btn,
.delete-btn {
    width: 100%;
    padding: 12px;
    font-size: 16px;
    margin-bottom: 10px;
    border: 2px solid;
}

.reset-btn {
    background: var(--warning-bg);
    border-color: var(--text-accent);
    box-shadow: 2px 2px 0px var(--text-accent);
    color: var(--text-primary);
}

.delete-btn {
    background: var(--error-bg);
    border-color: var(--error-border);
    box-shadow: 2px 2px 0px var(--error-border);
    color: var(--text-primary);
}

.avatar {
    position: relative;
    cursor: pointer;
}

.avatar:hover .avatar-edit {
    opacity: 1;
}

.avatar-edit {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0,0,0,0.7);
    color: white;
    font-size: 12px;
    padding: 5px;
    text-align: center;
    opacity: 0;
    transition: opacity 0.3s;
    border-radius: 0 0 50% 50%;
}

.edit-profile-btn {
    padding: 6px 12px;
    font-size: 14px;
    background: var(--button-secondary-bg);
    border: 2px solid var(--button-secondary-border);
    box-shadow: 2px 2px 0px var(--button-secondary-border);
    margin-top: 10px;
    transform: rotate(-0.1deg);
}

.edit-profile-btn:active {
    transform: rotate(-0.1deg) translate(1px, 1px);
    box-shadow: 1px 1px 0px var(--button-secondary-border);
}

.profile-details {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 2px dashed var(--card-border);
}

.detail-item {
    margin-bottom: 15px;
}

.detail-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.detail-value {
    font-size: 16px;
    color: var(--text-primary);
    margin: 0;
    padding: 10px;
    background: var(--detail-bg);
    border-radius: 4px;
    border: 1px solid var(--detail-border);
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: var(--card-bg);
    padding: 30px;
    border: 3px solid var(--button-border);
    border-radius: 8px;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 5px 5px 0px var(--button-border);
}

.modal-content h3 {
    margin: 0 0 20px 0;
    font-size: 24px;
    color: var(--text-primary);
}

.avatar-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    margin-bottom: 20px;
}

.avatar-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 10px;
    border: 2px solid transparent;
    border-radius: 8px;
    transition: all 0.2s;
}

.avatar-option:hover {
    border-color: var(--button-secondary-border);
    background: var(--button-secondary-bg);
}

.avatar-preview {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: bold;
    color: white;
    border: 2px solid var(--button-border);
}

.emoji-avatar {
    background: linear-gradient(135deg, var(--neutral-bg), var(--neutral-border));
    font-size: 36px;
}

.avatar-option span {
    font-size: 12px;
    color: var(--text-secondary);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-group textarea {
    width: 100%;
    padding: 12px;
    font-size: 16px;
    font-family: 'Klee One', cursive;
    border: 2px solid var(--button-border);
    border-radius: 4px;
    background: var(--input-bg);
    color: var(--text-primary);
    resize: vertical;
    box-sizing: border-box;
}

.form-group textarea:focus {
    outline: none;
    border-color: var(--button-secondary-border);
    box-shadow: 0 0 0 3px var(--shadow-color);
}

.modal-buttons {
    display: flex;
    gap: 10px;
}

.modal-close-btn,
.modal-cancel-btn,
.modal-save-btn {
    padding: 12px 24px;
    font-size: 16px;
    border: 2px solid;
    cursor: pointer;
    font-weight: 600;
}

.modal-close-btn,
.modal-cancel-btn {
    background: var(--neutral-bg);
    border-color: var(--neutral-border);
    box-shadow: 2px 2px 0px var(--neutral-border);
    flex: 1;
}

.modal-save-btn {
    background: var(--button-secondary-bg);
    border-color: var(--button-secondary-border);
    box-shadow: 2px 2px 0px var(--button-secondary-border);
    flex: 1;
}

@media (max-width: 600px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .user-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .profile-btn,
    .logout-btn {
        width: 100%;
    }
    
    .avatar-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .modal-content {
        padding: 20px;
    }
}

.hidden {
    display: none;
}

.buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
    padding: 0;
}

button {
    padding: 18px 20px;
    font-size: 18px;
    font-family: 'Klee One', cursive;
    background: var(--button-bg);
    color: var(--text-primary);
    border: 3px solid var(--button-border);
    cursor: pointer;
    transform: rotate(-0.3deg);
    box-shadow: 3px 3px 0px var(--button-border);
    transition: all 0.2s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    font-weight: 600;
    width: 100%;
    user-select: none;
    -webkit-user-select: none;
    position: relative;
    overflow: hidden;
    min-height: 56px;
}

button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: var(--shadow-color);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

button:active::before {
    width: 300px;
    height: 300px;
}

button:active {
    transform: rotate(-0.3deg) translate(2px, 2px) scale(0.98);
    box-shadow: 1px 1px 0px var(--button-border);
}

.buttons button:nth-child(2) {
    transform: rotate(0.3deg);
    background: var(--button-secondary-bg);
    border-color: var(--button-secondary-border);
    box-shadow: 3px 3px 0px var(--button-secondary-border);
}

.buttons button:nth-child(2):active {
    transform: rotate(0.3deg) translate(2px, 2px);
    box-shadow: 1px 1px 0px var(--button-secondary-border);
}

.count {
    text-align: center;
    font-size: 20px;
    color: var(--text-secondary);
    background: var(--button-bg);
    display: inline-block;
    padding: 14px 28px;
    border: 2px dashed var(--card-border);
    margin-left: 50%;
    transform: translateX(-50%) rotate(-0.3deg);
    transition: all 0.3s ease;
}

#count {
    font-weight: 600;
    color: var(--text-accent);
    font-size: 26px;
    display: inline-block;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

#count.bounce {
    animation: bounce 0.5s ease;
}

@keyframes bounce {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.3) rotate(2deg);
    }
}

@media (min-width: 600px) {
    .notebook {
        padding: 40px 20px;
    }
    
    .container {
        max-width: 600px;
        padding: 0;
    }
    
    h1 {
        font-size: 36px;
        margin: 30px 0 20px 0;
    }
    
    .subtitle {
        font-size: 18px;
        margin-bottom: 40px;
    }
    
    .subject-grid {
        gap: 25px;
        margin-top: 40px;
    }
    
    .subject-card {
        padding: 40px 20px;
    }
    
    .subject-card:hover {
        transform: rotate(-1deg) translate(-3px, -3px);
        box-shadow: 7px 7px 0px var(--button-border);
    }
    
    .subject-card:nth-child(2):hover {
        transform: rotate(1deg) translate(-3px, -3px);
    }
    
    .subject-icon {
        font-size: 48px;
    }
    
    .subject-name {
        font-size: 24px;
    }
    
    .back-btn {
        padding: 8px 16px;
        font-size: 14px;
        margin-bottom: 20px;
    }
    
    .back-btn:hover {
        transform: rotate(-0.5deg) translate(-1px, -1px);
        box-shadow: 3px 3px 0px var(--neutral-border);
    }
    
    .card {
        padding: 45px 35px;
        margin-bottom: 40px;
        min-height: 220px;
    }
    
    .question {
        font-size: 32px;
        margin: 25px 0;
        line-height: 1.6;
    }
    
    .answer {
        font-size: 28px;
        margin: 30px 0;
    }
    
    .buttons {
        flex-direction: row;
        gap: 15px;
        margin-bottom: 40px;
    }
    
    button {
        padding: 14px 28px;
        font-size: 18px;
        width: auto;
    }
    
    .choice-btn {
        padding: 18px 22px;
        font-size: 17px;
        line-height: 1.7;
    }
    
    button:hover {
        transform: rotate(-1deg) translate(-2px, -2px);
        box-shadow: 5px 5px 0px var(--button-border);
    }
    
    button:nth-child(2):hover {
        transform: rotate(1deg) translate(-2px, -2px);
        box-shadow: 5px 5px 0px var(--button-secondary-border);
    }
    
    .count {
        font-size: 20px;
        padding: 10px 20px;
    }
    
    #count {
        font-size: 24px;
    }
}

.continue-section {
    margin: 20px 0;
}

.continue-btn {
    width: 100%;
    padding: 20px;
    background: linear-gradient(135deg, var(--button-secondary-bg), var(--button-bg));
    border: 3px solid var(--button-secondary-border);
    box-shadow: 4px 4px 0px var(--button-secondary-border);
    display: flex;
    align-items: center;
    gap: 15px;
    text-align: left;
    transform: rotate(-0.2deg);
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    position: relative;
    overflow: hidden;
    min-height: auto;
}

.continue-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s;
}

.continue-btn:hover::before {
    left: 100%;
}

.continue-btn:active {
    transform: rotate(-0.2deg) translate(2px, 2px);
    box-shadow: 2px 2px 0px var(--button-secondary-border);
}

.continue-icon {
    font-size: 32px;
    min-width: 40px;
    animation: pulse-icon 2s ease-in-out infinite;
}

@keyframes pulse-icon {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

.continue-text {
    flex: 1;
}

.continue-title {
    font-size: 20px;
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.continue-detail {
    font-size: 14px;
    color: var(--text-secondary);
}

@media (min-width: 600px) {
    .continue-btn {
        padding: 25px 30px;
    }
    
    .continue-btn:hover {
        transform: rotate(-0.2deg) translate(-2px, -2px);
        box-shadow: 6px 6px 0px var(--button-secondary-border);
    }
    
    .continue-icon {
        font-size: 40px;
    }
    
    .continue-title {
        font-size: 24px;
    }
    
    .continue-detail {
        font-size: 16px;
    }
}

/* KaTeX数式のスタイル調整 */
.katex {
    font-size: 1.1em;
}

.question .katex {
    font-size: 1em;
}

.choice-btn .katex {
    font-size: 0.95em;
}

.katex-display {
    margin: 0.5em 0;
}

/* ダークモードでのKaTeX調整 */
[data-theme="dark"] .katex {
    color: var(--text-primary);
}

[data-theme="dark"] .katex .mord,
[data-theme="dark"] .katex .mbin,
[data-theme="dark"] .katex .mrel,
[data-theme="dark"] .katex .mop,
[data-theme="dark"] .katex .mpunct {
    color: var(--text-primary);
}

/* パッセージモード結果表示スタイル */
.result-item {
    background: var(--card-bg);
    padding: 20px;
    margin-bottom: 20px;
    border: 2px solid var(--card-border);
    border-radius: 8px;
    box-shadow: 3px 3px 0px var(--shadow-color);
    transition: all 0.3s ease;
}

.result-item:nth-child(even) {
    /* 読みやすさのため回転なし */
}

.result-item.correct {
    background: var(--success-bg);
    border-color: var(--success-border);
    box-shadow: 3px 3px 0px var(--success-border);
}

.result-item.wrong {
    background: var(--error-bg);
    border-color: var(--error-border);
    box-shadow: 3px 3px 0px var(--error-border);
}

.result-item h3 {
    margin: 0 0 15px 0;
    font-size: 20px;
    color: var(--text-primary);
    font-weight: bold;
    border-bottom: 2px dashed var(--card-border);
    padding-bottom: 10px;
}

.result-item p {
    margin: 10px 0;
    font-size: 16px;
    color: var(--text-primary);
    line-height: 1.6;
}

.result-item .explanation {
    margin-top: 15px;
    padding: 15px;
    background: var(--detail-bg);
    border-left: 4px solid var(--button-secondary-border);
    border-radius: 4px;
    font-size: 15px;
    color: var(--text-secondary);
    font-style: italic;
}

.result-item.correct .explanation {
    border-left-color: var(--success-border);
}

.result-item.wrong .explanation {
    border-left-color: var(--error-border);
}

/* 解説ボックススタイル（word-wrap対応） */
.explanation-box {
    word-wrap: break-word;
    overflow-wrap: break-word;
    word-break: break-word;
    max-width: 100%;
    overflow-x: auto;
}

.explanation-box strong {
    display: inline-block;
    margin-bottom: 8px;
    color: var(--text-primary);
}

/* ==================== 誤文訂正用手書き風スタイル ==================== */

/* 誤文訂正の赤色下線 */
.error-correction-span {
    text-decoration: underline;
    text-decoration-color: var(--text-accent);
    text-decoration-thickness: 2px;
    color: var(--text-primary);
    font-family: 'Klee One', cursive;
}

/* 誤文訂正のラベル（下付き文字） */
.error-label-subscript {
    font-size: 0.8em;
    vertical-align: sub;
    color: var(--text-secondary);
    font-family: 'Klee One', cursive;
}

@media (min-width: 600px) {
    .result-item {
        padding: 25px;
    }

    .result-item h3 {
        font-size: 22px;
    }

    .result-item p {
        font-size: 17px;
    }

    .result-item .explanation {
        font-size: 16px;
        padding: 18px;
    }
}

/* ==================== 英作文添削システム ==================== */

.english-composition-system {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
}

/* ヘッダー */
.composition-header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    border-radius: 8px;
    box-shadow: 3px 3px 0px var(--shadow-color);
    transform: rotate(-0.2deg);
}

.composition-title {
    font-family: 'Zen Kurenaido', sans-serif;
    font-size: 28px;
    color: var(--text-primary);
    margin: 0 0 10px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.composition-title .material-symbols-outlined {
    font-size: 32px;
    color: var(--text-accent);
}

.composition-description {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
}

/* 入力セクション */
.composition-input-section {
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    border-radius: 8px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 3px 3px 0px var(--shadow-color);
    transform: rotate(0.1deg);
}

.input-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    flex-wrap: wrap;
    gap: 10px;
}

.input-header h3 {
    font-family: 'Zen Kurenaido', sans-serif;
    font-size: 20px;
    color: var(--text-primary);
    margin: 0;
}

.input-controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

.char-count {
    font-size: 14px;
    color: var(--text-secondary);
    font-family: 'Klee One', cursive;
}

.char-count.warning {
    color: var(--text-accent);
    font-weight: 600;
}

.clear-btn {
    padding: 8px 16px;
    font-size: 14px;
    background: var(--neutral-bg);
    color: var(--text-primary);
    border: 2px solid var(--neutral-border);
    border-radius: 6px;
    cursor: pointer;
    font-family: 'Klee One', cursive;
    box-shadow: 2px 2px 0px var(--neutral-border);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 5px;
    min-height: auto;
}

.clear-btn:hover {
    transform: translateY(-1px);
    box-shadow: 3px 3px 0px var(--neutral-border);
}

.clear-btn:active {
    transform: translateY(1px);
    box-shadow: 1px 1px 0px var(--neutral-border);
}

.clear-btn .material-symbols-outlined {
    font-size: 18px;
}

.textarea-container {
    position: relative;
}

#composition-text {
    width: 100%;
    min-height: 200px;
    padding: 15px;
    font-size: 16px;
    font-family: 'Klee One', cursive;
    color: var(--text-primary);
    background: var(--input-bg);
    border: 2px solid var(--button-border);
    border-radius: 8px;
    resize: vertical;
    box-sizing: border-box;
    line-height: 1.6;
    transition: all 0.2s;
}

#composition-text:focus {
    outline: none;
    border-color: var(--button-secondary-border);
    box-shadow: 0 0 0 3px var(--shadow-color);
}

#composition-text::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

.input-footer {
    margin-top: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sgif-info {
    display: flex;
    align-items: center;
    gap: 8px;
}

.info-badge {
    background: var(--button-secondary-bg);
    color: var(--text-primary);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    border: 1px solid var(--button-secondary-border);
}

.input-footer small {
    font-size: 12px;
    color: var(--text-secondary);
}

.submit-section {
    margin-top: 20px;
    text-align: center;
}

.submit-composition-btn {
    padding: 16px 32px;
    font-size: 18px;
    font-weight: 600;
    background: var(--text-accent);
    color: white;
    border: 3px solid #c0392b;
    border-radius: 8px;
    cursor: pointer;
    font-family: 'Klee One', cursive;
    box-shadow: 3px 3px 0px #c0392b;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: auto;
}

.submit-composition-btn:hover {
    transform: translateY(-2px);
    box-shadow: 4px 4px 0px #c0392b;
}

.submit-composition-btn:active {
    transform: translateY(1px);
    box-shadow: 2px 2px 0px #c0392b;
}

.submit-composition-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.submit-composition-btn .material-symbols-outlined {
    font-size: 24px;
}

/* 処理中表示 */
.processing-section {
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    border-radius: 8px;
    padding: 40px;
    margin-bottom: 20px;
    text-align: center;
    box-shadow: 3px 3px 0px var(--shadow-color);
}

.processing-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--card-border);
    border-top-color: var(--text-accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.spinner.small {
    width: 20px;
    height: 20px;
    border-width: 3px;
    display: inline-block;
    vertical-align: middle;
    margin-right: 8px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.processing-details {
    font-size: 14px;
    color: var(--text-secondary);
}

/* 結果セクション */
.result-section {
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    border-radius: 8px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 3px 3px 0px var(--shadow-color);
    transform: rotate(-0.1deg);
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px dashed var(--card-border);
    flex-wrap: wrap;
    gap: 10px;
}

.result-header h3 {
    font-family: 'Zen Kurenaido', sans-serif;
    font-size: 22px;
    color: var(--text-primary);
    margin: 0;
}

.result-meta {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.confidence-badge,
.processing-time {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 14px;
    color: var(--text-secondary);
    background: var(--button-bg);
    padding: 6px 12px;
    border-radius: 6px;
    border: 1px solid var(--card-border);
}

.confidence-badge .material-symbols-outlined,
.processing-time .material-symbols-outlined {
    font-size: 18px;
}

/* SGIFカテゴリ */
.sgif-category-section {
    margin-bottom: 25px;
}

.category-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 15px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.category-header .material-symbols-outlined {
    font-size: 20px;
    color: var(--text-accent);
}

.sgif-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 10px;
}

.sgif-category {
    background: var(--button-bg);
    border: 2px solid var(--card-border);
    border-radius: 6px;
    padding: 10px;
    text-align: center;
    transition: all 0.2s;
    opacity: 0.5;
}

.sgif-category.active {
    opacity: 1;
    background: var(--button-secondary-bg);
    border-color: var(--button-secondary-border);
    box-shadow: 2px 2px 0px var(--button-secondary-border);
    transform: scale(1.05);
}

.category-label {
    display: block;
    font-weight: 600;
    font-size: 16px;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.category-desc {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
}

/* 比較表示 */
.comparison-section {
    margin-bottom: 25px;
}

.comparison-container {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 15px;
    align-items: center;
}

.original-text,
.corrected-text {
    background: var(--input-bg);
    border: 2px solid var(--card-border);
    border-radius: 8px;
    padding: 20px;
}

.original-text h4,
.corrected-text h4 {
    font-family: 'Zen Kurenaido', sans-serif;
    font-size: 16px;
    color: var(--text-primary);
    margin: 0 0 10px 0;
}

.original-text {
    border-left: 4px solid var(--error-border);
}

.corrected-text {
    border-left: 4px solid var(--success-border);
}

.text-content {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-primary);
    word-wrap: break-word;
}

.arrow-separator {
    font-size: 32px;
    color: var(--text-accent);
}

.arrow-separator .material-symbols-outlined {
    font-size: 32px;
}

/* 詳細分析 */
.analysis-section,
.suggestions-section {
    margin-bottom: 25px;
}

.analysis-section h4,
.suggestions-section h4 {
    font-family: 'Zen Kurenaido', sans-serif;
    font-size: 18px;
    color: var(--text-primary);
    margin: 0 0 15px 0;
}

.error-list,
.suggestion-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.no-errors,
.no-suggestions {
    text-align: center;
    padding: 20px;
    color: var(--text-secondary);
    font-style: italic;
}

.error-item,
.suggestion-item {
    background: var(--detail-bg);
    border: 2px solid var(--detail-border);
    border-radius: 8px;
    padding: 15px;
    transition: all 0.2s;
}

.error-item:hover,
.suggestion-item:hover {
    transform: translateX(5px);
    box-shadow: 2px 2px 0px var(--shadow-color);
}

.error-header,
.suggestion-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.error-category,
.suggestion-type {
    background: var(--text-accent);
    color: white;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
}

.error-position {
    font-size: 12px;
    color: var(--text-secondary);
}

.error-content,
.suggestion-content {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.error-original,
.error-corrected,
.error-explanation,
.suggestion-text,
.suggestion-reason {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 14px;
    line-height: 1.6;
}

.error-original .label,
.error-corrected .label,
.suggestion-reason .label {
    font-weight: 600;
    color: var(--text-primary);
    min-width: 50px;
}

.error-original .text {
    color: var(--text-accent);
    text-decoration: line-through;
}

.error-corrected .text.corrected {
    color: var(--success-border);
    font-weight: 600;
}

.error-explanation .material-symbols-outlined,
.suggestion-text .material-symbols-outlined {
    font-size: 18px;
    color: var(--button-secondary-border);
    margin-top: 2px;
}

/* アクションボタン */
.result-actions {
    display: flex;
    gap: 15px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.copy-btn,
.new-composition-btn {
    flex: 1;
    min-width: 150px;
    padding: 12px 20px;
    font-size: 16px;
    font-weight: 600;
    font-family: 'Klee One', cursive;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: auto;
}

.copy-btn {
    background: var(--button-secondary-bg);
    color: var(--text-primary);
    border: 2px solid var(--button-secondary-border);
    box-shadow: 2px 2px 0px var(--button-secondary-border);
}

.copy-btn:hover {
    transform: translateY(-1px);
    box-shadow: 3px 3px 0px var(--button-secondary-border);
}

.copy-btn:active {
    transform: translateY(1px);
    box-shadow: 1px 1px 0px var(--button-secondary-border);
}

.new-composition-btn {
    background: var(--button-bg);
    color: var(--text-primary);
    border: 2px solid var(--button-border);
    box-shadow: 2px 2px 0px var(--button-border);
}

.new-composition-btn:hover {
    transform: translateY(-1px);
    box-shadow: 3px 3px 0px var(--button-border);
}

.new-composition-btn:active {
    transform: translateY(1px);
    box-shadow: 1px 1px 0px var(--button-border);
}

.copy-btn .material-symbols-outlined,
.new-composition-btn .material-symbols-outlined {
    font-size: 20px;
}

/* 履歴セクション */
.history-section {
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 3px 3px 0px var(--shadow-color);
    transform: rotate(0.2deg);
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.history-header h3 {
    font-family: 'Zen Kurenaido', sans-serif;
    font-size: 20px;
    color: var(--text-primary);
    margin: 0;
}

.toggle-history-btn {
    padding: 8px 16px;
    font-size: 14px;
    background: var(--button-bg);
    color: var(--text-primary);
    border: 2px solid var(--button-border);
    border-radius: 6px;
    cursor: pointer;
    font-family: 'Klee One', cursive;
    box-shadow: 2px 2px 0px var(--button-border);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 5px;
    min-height: auto;
}

.toggle-history-btn:hover {
    transform: translateY(-1px);
    box-shadow: 3px 3px 0px var(--button-border);
}

.toggle-history-btn:active {
    transform: translateY(1px);
    box-shadow: 1px 1px 0px var(--button-border);
}

.toggle-history-btn .material-symbols-outlined {
    font-size: 18px;
}

.history-content {
    margin-top: 15px;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.no-history {
    text-align: center;
    padding: 30px;
    color: var(--text-secondary);
    font-style: italic;
}

.history-item {
    background: var(--detail-bg);
    border: 2px solid var(--detail-border);
    border-radius: 8px;
    padding: 15px;
    transition: all 0.2s;
}

.history-item:hover {
    transform: translateX(5px);
    box-shadow: 2px 2px 0px var(--shadow-color);
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.history-date {
    font-size: 14px;
    color: var(--text-secondary);
}

.history-category {
    background: var(--button-secondary-bg);
    color: var(--text-primary);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    border: 1px solid var(--button-secondary-border);
}

.history-preview {
    margin-bottom: 10px;
}

.original-preview {
    font-size: 14px;
    color: var(--text-primary);
    line-height: 1.6;
    word-wrap: break-word;
}

.history-actions {
    display: flex;
    justify-content: flex-end;
}

.view-details-btn {
    padding: 6px 12px;
    font-size: 14px;
    background: var(--button-bg);
    color: var(--text-primary);
    border: 2px solid var(--button-border);
    border-radius: 6px;
    cursor: pointer;
    font-family: 'Klee One', cursive;
    box-shadow: 2px 2px 0px var(--button-border);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 5px;
    min-height: auto;
}

.view-details-btn:hover {
    transform: translateY(-1px);
    box-shadow: 3px 3px 0px var(--button-border);
}

.view-details-btn:active {
    transform: translateY(1px);
    box-shadow: 1px 1px 0px var(--button-border);
}

.view-details-btn .material-symbols-outlined {
    font-size: 16px;
}

.load-more-btn {
    width: 100%;
    margin-top: 15px;
    padding: 10px 20px;
    font-size: 14px;
    background: var(--button-bg);
    color: var(--text-primary);
    border: 2px solid var(--button-border);
    border-radius: 6px;
    cursor: pointer;
    font-family: 'Klee One', cursive;
    box-shadow: 2px 2px 0px var(--button-border);
    transition: all 0.2s;
    min-height: auto;
}

.load-more-btn:hover {
    transform: translateY(-1px);
    box-shadow: 3px 3px 0px var(--button-border);
}

.load-more-btn:active {
    transform: translateY(1px);
    box-shadow: 1px 1px 0px var(--button-border);
}

/* メッセージ表示 */
.message {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 15px 20px;
    border-radius: 8px;
    font-family: 'Klee One', cursive;
    font-size: 14px;
    box-shadow: 3px 3px 0px var(--shadow-color);
    animation: slideIn 0.3s ease-out;
    z-index: 1000;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.message-success {
    background: var(--success-bg);
    border: 2px solid var(--success-border);
    color: var(--text-primary);
}

.message-error {
    background: var(--error-bg);
    border: 2px solid var(--error-border);
    color: var(--text-primary);
}

.message-info {
    background: var(--button-secondary-bg);
    border: 2px solid var(--button-secondary-border);
    color: var(--text-primary);
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .composition-title {
        font-size: 24px;
    }

    .comparison-container {
        grid-template-columns: 1fr;
    }

    .arrow-separator {
        transform: rotate(90deg);
        margin: 10px 0;
    }

    .result-actions {
        flex-direction: column;
    }

    .copy-btn,
    .new-composition-btn {
        width: 100%;
    }

    .sgif-categories {
        grid-template-columns: repeat(2, 1fr);
    }

    .result-meta {
        width: 100%;
        justify-content: space-between;
    }
}

@media (max-width: 480px) {
    .composition-header {
        padding: 15px;
    }

    .composition-title {
        font-size: 20px;
        flex-direction: column;
    }

    .composition-input-section {
        padding: 15px;
    }

    .input-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .result-section {
        padding: 15px;
    }

    .sgif-categories {
        grid-template-columns: 1fr;
    }
}

/* ==================== PCモード ==================== */

/* PCモード: コンテナ幅を広げる */
html.pc-mode .container {
    max-width: 100%;
}

html.pc-mode .english-composition-system {
    max-width: 1400px;
}

html.pc-mode .login-container {
    max-width: 600px;
}

html.pc-mode .profile-container {
    max-width: 900px;
}

/* PCモード: カード表示の調整 */
html.pc-mode @media (min-width: 600px) {
    .container {
        max-width: 1200px;
    }
}

html.pc-mode @media (min-width: 900px) {
    .container {
        max-width: 1600px;
    }
}

/* PCモード: 英作文システムのレイアウト調整 */
html.pc-mode .comparison-container {
    grid-template-columns: 1fr auto 1fr;
}

html.pc-mode .result-section {
    max-width: none;
}

/* PCモード: テキストエリアの幅調整 */
html.pc-mode #composition-text {
    min-height: 250px;
}

/* ==================== 統一サイドバー追加スタイル ==================== */

/* ユーザー情報スタイル */
.sidebar-user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 15px;
    padding: 10px;
    background: var(--detail-bg);
    border-radius: 8px;
    border: 1px solid var(--detail-border);
}

.user-avatar {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--button-secondary-bg), var(--button-secondary-border));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: bold;
    color: var(--text-primary);
    border: 2px solid var(--card-border);
    flex-shrink: 0;
}

.user-details {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.user-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-status {
    font-size: 12px;
    color: var(--text-secondary);
}

/* サイドバーボタンのスタイル調整 */
.sidebar-nav-btn {
    background: var(--button-bg);
    border: 2px solid var(--button-border);
    border-radius: 6px;
    padding: 10px 15px;
    margin: 5px 0;
    cursor: pointer;
    font-family: 'Klee One', cursive;
    font-size: 14px;
    color: var(--text-primary);
    width: 100%;
    transition: all 0.2s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    transform: rotate(-0.1deg);
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 8px;
    box-sizing: border-box;
    text-overflow: ellipsis;
    white-space: nowrap;
    overflow: hidden;
}

button.sidebar-nav-btn {
    text-align: left;
    min-height: auto;
}

button.sidebar-nav-btn::before {
    display: none;
}

.sidebar-nav-btn:hover {
    transform: rotate(0deg) translateY(-2px);
    box-shadow: 3px 3px 0px var(--button-border);
    background: var(--card-bg);
}

.sidebar-nav-btn:active {
    transform: rotate(0deg) translateY(0);
    box-shadow: 1px 1px 0px var(--button-border);
}

/* ローディングスピナー */
@keyframes spinLoader {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.loading-spinner {
    animation: spinLoader 1s linear infinite;
}