/* ========================================
   セルフホスティングフォント定義
   ======================================== */

/* noto-sans-jp-regular - japanese_latin */
@font-face {
  font-display: swap;
  font-family: 'Noto Sans JP';
  font-style: normal;
  font-weight: 400;
  src: url('../fonts/noto-sans-jp-v55-japanese_latin-regular.woff2') format('woff2');
}

/* noto-sans-jp-500 - japanese_latin */
@font-face {
  font-display: swap;
  font-family: 'Noto Sans JP';
  font-style: normal;
  font-weight: 500;
  src: url('../fonts/noto-sans-jp-v55-japanese_latin-500.woff2') format('woff2');
}

/* noto-sans-jp-600 - japanese_latin */
@font-face {
  font-display: swap;
  font-family: 'Noto Sans JP';
  font-style: normal;
  font-weight: 600;
  src: url('../fonts/noto-sans-jp-v55-japanese_latin-600.woff2') format('woff2');
}

/* noto-sans-jp-700 - japanese_latin */
@font-face {
  font-display: swap;
  font-family: 'Noto Sans JP';
  font-style: normal;
  font-weight: 700;
  src: url('../fonts/noto-sans-jp-v55-japanese_latin-700.woff2') format('woff2');
}

/* ライト・ダークモード用のCSS変数（システム設定に従う） */
:root {
    /* ライトモード（デフォルト） */
    --bg-primary: #ffffff;
    --bg-secondary: #f7f7f8;
    --bg-tertiary: #ececf1;
    --bg-input: #ffffff;
    --bg-user-message: #f0f0f0;
    --bg-ai-message: #ffffff;
    --bg-chat-input-form: #ffffff;
    /* 共通(デフォルト)コード背景: ライト:薄いグレー */
    --bg-code: #ededed; /* fallback */
    /* 質問(ユーザー投稿)用コードブロック背景 */
    --bg-code-user: #f6f6f7; /* やや薄いグレー */
    /* 回答(AI)用コードブロック背景 (ライト) */
    --bg-code-ai: #f3f4f6; /* 指定:薄いグレー */
    /* ダークテーマ用(メディアクエリ内で上書き) */
    --bg-quote: rgba(59, 130, 246, 0.08);
    
    --text-primary: #2d3748;
    --text-secondary: #4a5568;
    --text-muted: #677283;
    --text-placeholder: #9298ad;
    --text-disclaimer: #5b5d61;
    --text-link: #3b82f6;
    --text-link-hover: #2563eb;
    
    --border-primary: #d1d5db;
    --border-secondary: #9ca3af;
    --border-input: #d1d5db;
    --border-input-focus: #6b7280;
    
    --shadow-primary: rgba(0, 0, 0, 0.1);
    --shadow-secondary: rgba(0, 0, 0, 0.15);
    
    --accent-primary: #374151;
    --accent-secondary: #4b5563;
    --accent-gradient-start: #374151;
    --accent-gradient-end: #4b5563;

    --svg-color: #222; /* SVGアイコンのデフォルト色 */
    --open-svg-color: #e08019;
    --private-svg-color: #08a131;
    --send-btn-svg: #f7fafb;
    --send-btn-bg: #202b31;
    --send-btn-hover-bg: #33465e; /* 送信ボタンのホバー時の背景色 */

    /* 共通 border-radius トークン */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 50%;
}

/* ダークモード用の変数（システム設定に従う） */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #242425;
        --bg-secondary: #2a2a2a;
        --bg-tertiary: #3a3a3a;
        --bg-input: #2a2a2a;
        --bg-user-message: #3a3a3a;
        --bg-ai-message: #242425;
        --bg-chat-input-form: #2d2d2e;
        --bg-code: #505256; /* 既存 fallback */
        --bg-code-user: #f6f6f7; /* ユーザーメッセージ用 (ライトと同じ) */
        --bg-code-ai: #f3f4f6; /* AIメッセージ用 (ライトと同じ) */
        --bg-quote: rgba(143, 168, 216, 0.1);
        
        --text-primary: #e8e8e8;
        --text-secondary: #dfdfdf;
        --text-muted: #afafaf;
        --text-placeholder: #b4b4b4;
        --text-disclaimer: #bcc3d6;
        --text-link: #8fa8d8;
        --text-link-hover: #a4b8e0;
        
        --border-primary: #404040;
        --border-secondary: #565656;
        --border-input: #404040;
        --border-input-focus: #565656;
        
        --shadow-primary: rgba(0, 0, 0, 0.3);
        --shadow-secondary: rgba(0, 0, 0, 0.6);
        
        --accent-primary: #565656;
        --accent-secondary: #404040;
        --accent-gradient-start: #565656;
        --accent-gradient-end: #404040;

        --svg-color: #fff;
        --open-svg-color: #eebc87;
        --private-svg-color: #8ce78c;
        --send-btn-svg: #0f131a;
        --send-btn-bg: #eaeaea;
        --send-btn-hover-bg: #d9dde3; /* 送信ボタンのホバー時の背景色 */
    }
}

/* 共通スクロールバー設定を削除 - base_v2.cssの設定を使用 */

/* ChatGPTスタイルのチャットページ - 完全全画面表示 */
html {
    margin: 0 !important;
    padding: 0 !important;
    height: 100% !important;
    background: var(--bg-primary);
}

body {
    margin: 0 !important;
    padding: 0 !important;
    height: 100% !important;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden; /* チャットページでは全体のスクロールを無効にし、chat-containerのみスクロール可能に */
    font-family: 'Noto Sans JP', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
    font-weight: 400;
}

body > .container {
    margin: 0 !important;
    padding: 0 !important;
    max-width: none !important;
    width: 100vw !important;
    min-height: 100dvh !important;
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    box-sizing: border-box;
}

.font-numeric {
    font-family: 'Noto Sans JP', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
    font-weight: 400;
}

h2 {
    border-bottom: none;
    margin: 0;
}

.chat-wrapper {
    display: flex;
    flex-direction: column;
    min-height: calc(100dvh - 50px); /* ヘッダー分を引いた高さ */
    width: 100vw;
    background: var(--bg-primary); /* 統一された背景色 */
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.header-container {
    position: sticky;
    top: 0;
    z-index: var(--z-appbar);
    background: var(--bg-primary);
    width: 100vw;
    flex-shrink: 0;
    box-sizing: border-box;
}

@media (prefers-color-scheme: dark) {
    .header-container {
        background: var(--bg-primary);
    }
}

.chat-header {
    width: 100%;
    max-width: none;
    margin: 0;
    display: grid;
    grid-template-columns: 1fr auto 1fr auto 1fr;
    align-items: center;
    justify-content: space-between;
    height: 50px;
    padding: 0 24px;
    background: transparent;
    box-sizing: border-box;
    gap: 12px;
}
.header-left {
    grid-column: 1;
    justify-self: start;
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-right {
    grid-column: 5;
    justify-self: end;
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-left a {
    font-weight: 500;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary) !important;
    padding: 10px 16px;
    border-radius: 24px;
    text-decoration: none !important;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    position: relative;
}

.header-left a:hover {
    background: rgba(210, 210, 210, 0.3);
    color: var(--text-primary);
    text-decoration: none !important;
}

@media (prefers-color-scheme: dark) {
    .header-left a {
        background: linear-gradient(135deg, 
            rgba(55, 65, 81, 0.95) 0%, 
            rgba(45, 55, 72, 0.95) 100%);
        border-color: rgba(68, 70, 84, 0.6);
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    }
    
    .header-left a:hover {
        background: linear-gradient(135deg, 
            rgba(75, 85, 99, 1) 0%, 
            rgba(55, 65, 81, 1) 100%);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
        border-color: rgba(102, 126, 234, 0.5);
    }
}

/* SVGアイコンのスタイル - テーマ対応 */

.header-left a.post-link svg {
    width: 18px;
    height: 18px;
    stroke: var(--text-secondary);
    color: var(--text-secondary);
    fill: none;
}

.chat-title-center {
    grid-column: 3;
    justify-self: center;
    text-align: center;
    min-width: 0;
    overflow: hidden;
}

.chat-title {
    margin: 0;
    font-size: 1rem;
    font-weight: 500;
    opacity: 0.9;
    text-align: center;
    line-height: 1.2;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
    color: var(--text-primary);
}

.chat-info {
    padding: 16px 20px;
    background: var(--bg-secondary);
    font-size: 0.9rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-primary);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    margin: 8px 16px;
    box-shadow: 0 2px 8px var(--shadow-primary);
}

#chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0 0 calc(140px + var(--safe-area-bottom)) 0; /* 下部パディングを大幅に削減（最下部メッセージの下端高さ） */
    width: 100%;
    max-width: none;
    margin: 0 !important;
    box-sizing: border-box;
    overflow-y: auto;
    background: var(--bg-primary); /* chat-input-formと同じ背景色 */
    border: none;
    box-shadow: none;
    border-radius: 0 !important;
    max-height: calc(100dvh - 50px - 60px); /* ヘッダー高さ(50px) + 入力フォーム領域(60px) を差し引いた高さ（メッセージが切れる位置調整） */
    height: calc(100dvh - 50px - 60px); /* 固定の高さを設定してスクロールエリアを明確化 */
}

.chat-input-form {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 64px);
    max-width: 57%;
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.98) 0%, 
        rgba(249, 250, 251, 0.98) 100%);
    border: 1px solid var(--border-primary);
    border-radius: 30px;
    box-shadow: 
        0 4px 24px rgba(0, 0, 0, 0.08),
        0 2px 12px rgba(0, 0, 0, 0.04);
    z-index: var(--z-dropdown);
    padding: 10px 14px;
    box-sizing: border-box;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px);
}

.chat-input-form:hover {
    border-color: #a855f7;
    box-shadow: 
        0 8px 24px rgba(112, 112, 112, 0.15),
        0 4px 12px rgba(112, 112, 112, 0.08);
}

.chat-input-form.input-focused {
    border-color: #a855f7;
    box-shadow: 
        0 12px 24px rgba(168, 85, 247, 0.1),
        0 6px 12px rgba(168, 85, 247, 0.06);
    transform: translateX(-50%) translateY(-2px);
}

@media (prefers-color-scheme: dark) {
    .chat-input-form {
        background: linear-gradient(135deg, 
            rgba(45, 45, 46, 0.98) 0%, 
            rgba(42, 42, 44, 0.98) 100%);
        box-shadow: 
            0 4px 24px rgba(0, 0, 0, 0.4),
            0 2px 12px rgba(0, 0, 0, 0.3);
    }
    
    .chat-input-form:hover,
    .chat-input-form.input-focused {
        box-shadow: 
            0 8px 32px rgba(168, 85, 247, 0.3),
            0 4px 16px rgba(168, 85, 247, 0.2);
    }
}

/* 入力コンテナ - 縦並び構造 (Geminiライク) */
.input-container {
    display: flex;
    flex-direction: column;
    gap: 4px;
    width: 100%;
    box-sizing: border-box;
}

/* 上部: テキストエリアセクション */
.textarea-section {
    flex: 1;
    display: flex;
    align-items: center;
    min-height: var(--touch-target-min);
}

/* 下部: フッターバー */
.input-footer {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    gap: 4px;
}

.input-footer-left {
    display: flex;
    align-items: center;
    gap: 2px;
}

.input-footer-right {
    display: flex;
    align-items: center;
    gap: 6px;
}

/* 追加ボタンラッパー */
.add-features-wrapper {
    position: relative;
    flex-shrink: 0;
}

/* 追加ボタン */
.add-features-btn {
    flex-shrink: 0;
    width: var(--touch-target-min);
    height: var(--touch-target-min);
    padding: 0;
    background: transparent;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.add-features-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.add-features-btn svg {
    stroke: currentColor;
}

/* ツールボタン */
.tools-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: transparent;
    border: none;
    border-radius: 16px;
    cursor: pointer;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary, #6b7280);
    transition: all 0.2s ease;
    white-space: nowrap;
    min-height: var(--touch-target-min);
    min-width: var(--touch-target-min);
}

.tools-btn:hover:not(:disabled) {
    background: var(--bg-secondary, #f3f4f6);
    color: var(--text-primary, #1f2937);
}

.tools-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.tools-btn svg {
    stroke: currentColor;
    flex-shrink: 0;
}

.tools-btn-label {
    font-size: 13px;
}

.textarea-section textarea {
    width: 100%;
    min-height: 20px;
    max-height: 200px;
    background: transparent;
    resize: none;
    padding: 8px 0; /* プレースホルダー位置調整のためパディングを増やす */
    margin: 0;
    border: none;
    outline: none;
    font-size: 16px;
    line-height: 1.5;
    box-sizing: border-box;
    color: var(--text-primary);
    overflow-y: hidden;
    font-family: 'Noto Sans JP', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
    font-weight: 400;
    caret-color: var(--text-primary); /* カーソル色を明示的に指定 */
}

.textarea-section textarea:focus {
    outline: none;
    caret-color: #6043e1; /* フォーカス時は青色の視認性の高いカーソル */
}

/* 右: 送信ボタン (既存スタイルを継承) */
/* 送信ボタンのスタイルは後続のセクションで定義 */

/* ──────────────────────────────────────
   チャット内モデル選択セレクター
   ────────────────────────────────────── */
.chat-model-selector-wrapper {
    position: relative;
    flex-shrink: 0;
}

.chat-model-selector-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: transparent;
    border: none;
    border-radius: 16px;
    cursor: pointer;
    font-family: 'Noto Sans JP', 'Segoe UI', Arial, sans-serif;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary, #6b7280);
    transition: all 0.2s ease;
    white-space: nowrap;
    min-height: var(--touch-target-min);
    min-width: var(--touch-target-min);
}

.chat-model-selector-btn:hover {
    background: var(--bg-secondary, #f3f4f6);
    color: var(--text-primary, #1f2937);
}

.chat-model-chevron {
    transition: transform 0.2s ease;
    flex-shrink: 0;
}

.chat-model-dropdown {
    position: absolute;
    bottom: calc(100% + 6px);
    left: 0;
    min-width: 260px;
    background: var(--bg-primary, #ffffff);
    border: 1px solid var(--border-primary, #e5e7eb);
    border-radius: 10px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    z-index: var(--z-appbar);
    overflow: hidden;
}

.chat-model-dropdown-list {
    padding: 3px;
}

.chat-model-option {
    display: flex;
    align-items: center;
    padding: 8px 10px;
    cursor: pointer;
    border-radius: 8px;
    font-size: 11px;
    color: var(--text-primary, #1f2937);
    transition: background 0.15s ease;
    gap: 8px;
}

.chat-model-option:hover {
    background: var(--bg-secondary, #f3f4f6);
}

.chat-model-option.selected {
    background: rgba(168, 85, 247, 0.08);
}

.chat-model-option-info {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
    gap: 1px;
}

.chat-model-option-name {
    font-size: 12px;
    font-weight: 500;
    line-height: 1.3;
}

.chat-model-option.selected .chat-model-option-name {
    color: var(--text-primary, #1f2937);
    font-weight: 600;
}

.chat-model-option-desc {
    font-size: 10px;
    color: var(--text-secondary, #6b7280);
    line-height: 1.3;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-model-check {
    flex-shrink: 0;
    color: #a855f7;
}

.chat-model-premium-badge {
    font-size: 12px;
    margin-left: 6px;
}

/* 残回数バッジ */
.chat-model-remaining-badge {
    font-size: 9px;
    font-weight: 600;
    padding: 1px 5px;
    border-radius: 8px;
    background: rgba(168, 85, 247, 0.1);
    color: #a855f7;
    margin-left: 6px;
    white-space: nowrap;
}
.chat-model-remaining-badge.unlimited {
    background: rgba(34, 197, 94, 0.1);
    color: #22c55e;
}
.chat-model-remaining-badge.low {
    background: rgba(239, 68, 68, 0.12);
    color: #ef4444;
}

/* ロック済みモデル */
.chat-model-option.locked {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
    user-select: none;
}
.chat-model-option.locked:hover {
    background: transparent;
}
.chat-model-lock-badge {
    font-size: 9px;
    margin-left: auto;
    color: var(--text-tertiary, #9ca3af);
    white-space: nowrap;
}

/* 次の解放情報 */
.chat-model-next-unlock {
    padding: 5px 10px;
    font-size: 11px;
    color: var(--text-secondary, #6b7280);
    border-top: 1px solid var(--border-primary, #e5e7eb);
    text-align: center;
}

/* Web検索アクティブバッジ */
.web-search-active-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(59, 130, 246, 0.1);
    flex-shrink: 0;
    cursor: default;
}

/* Web検索トグルインジケータ */
.feature-toggle-indicator {
    width: 36px;
    height: 20px;
    border-radius: 10px;
    background: var(--bg-tertiary, #d1d5db);
    position: relative;
    flex-shrink: 0;
    transition: background 0.2s ease;
}
.feature-toggle-indicator .toggle-dot {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #fff;
    transition: transform 0.2s ease;
}
.feature-toggle-indicator.on {
    background: #a855f7;
}
.feature-toggle-indicator.on .toggle-dot {
    transform: translateX(16px);
}

/* Web検索アクティブ状態のfeature-option */
.feature-option.active {
    background: rgba(168, 85, 247, 0.06);
}

@media (prefers-color-scheme: dark) {
    .chat-model-selector-btn {
        background: transparent;
        color: var(--text-secondary, #9ca3af);
    }
    .chat-model-selector-btn:hover {
        background: rgba(255, 255, 255, 0.08);
        color: var(--text-primary, #e5e7eb);
    }
    .tools-btn {
        color: var(--text-secondary, #9ca3af);
    }
    .tools-btn:hover:not(:disabled) {
        background: rgba(255, 255, 255, 0.08);
        color: var(--text-primary, #e5e7eb);
    }
    .chat-model-dropdown {
        background: var(--bg-primary, #1f1f1f);
        border-color: rgba(255, 255, 255, 0.1);
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    }
    .chat-model-option:hover {
        background: rgba(255, 255, 255, 0.06);
    }
    .chat-model-option.selected {
        background: rgba(168, 85, 247, 0.15);
    }
    .chat-model-remaining-badge {
        background: rgba(168, 85, 247, 0.2);
    }
    .chat-model-remaining-badge.unlimited {
        background: rgba(34, 197, 94, 0.2);
    }
    .chat-model-remaining-badge.low {
        background: rgba(239, 68, 68, 0.2);
    }
    .chat-model-next-unlock {
        border-top-color: rgba(255, 255, 255, 0.08);
    }
    .chat-model-option-desc {
        color: rgba(255, 255, 255, 0.6);
    }
    .chat-model-option.selected .chat-model-option-name {
        color: var(--text-primary, #e5e7eb);
    }
    .chat-model-check {
        color: #c084fc;
    }
    .web-search-active-badge {
        background: rgba(59, 130, 246, 0.2);
    }
    .feature-toggle-indicator {
        background: rgba(255, 255, 255, 0.15);
    }
    .feature-option.active {
        background: rgba(168, 85, 247, 0.12);
    }
}

/* 削除: 下部ボタンバーは不要 */
/* .bottom-bar, .bottom-bar-left, .bottom-bar-right は削除 */

/* プレースホルダーのスタイル */
.textarea-section textarea::placeholder {
    color: var(--text-placeholder);
    opacity: 1;
    line-height: 1.5; /* テキストと同じline-heightで位置を揃える */
    text-align: left; /* 左寄せ */
}

.chat-disclaimer {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 64px);
    max-width: 768px;
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-disclaimer);
    background: transparent;
    padding: 8px 16px;
    margin: 0;
    letter-spacing: 0;
    user-select: none;
    line-height: 1.2;
    z-index: var(--z-dropdown);
}

/* ライトモード: メッセージ送信ボタン */
.send-btn {
    flex-shrink: 0;
    padding: 6px;
    background: var(--send-btn-bg);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 36px;
    width: 36px;
    min-width: 36px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: relative;
}

.send-btn:hover:not(:disabled) {
    background: #363636;
    transform: translateY(-2px);
}

.send-btn:active:not(:disabled) {
    transform: translateY(0) scale(0.98);
}

.send-btn:disabled {
    opacity: 0.8;
    cursor: not-allowed;
    transform: none;
}

/* 送信ボタンのSVGアイコン */
.send-btn svg {
    stroke: var(--send-btn-svg);
    color: var(--send-btn-svg);
    width: 16px;
    height: 16px;
    display: block;
    transform: translateY(1px);
}

/* 機能追加モーダル */
.add-features-modal {
    position: absolute;
    bottom: calc(100% + 8px); /* ボタンの上部に8pxの間隔を開けて表示 */
    left: 0; /* ボタンの左端に揃える */
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: 12px;
    box-shadow: 0 4px 16px var(--shadow-secondary);
    padding: 8px;
    z-index: calc(var(--z-dropdown) + 1);
    min-width: 240px;
    max-width: 320px;
}

.feature-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.feature-option:not(.disabled):hover {
    background: var(--bg-secondary);
}

.feature-option.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.feature-icon {
    width: var(--touch-target-min);
    height: var(--touch-target-min);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: 8px;
    flex-shrink: 0;
}

.feature-icon svg {
    stroke: var(--text-primary);
    width: 20px;
    height: 20px;
}

.feature-info {
    flex: 1;
}

.feature-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.feature-status {
    font-size: 12px;
    color: var(--text-muted);
}
/* ChatGPTスタイルのメッセージ - 完全一新 */
.message-wrapper {
    width: 100%;
    padding: 12px 24px;
    display: flex;
    margin-bottom: 8px;
    position: relative;
    clear: both;
}

/* AIメッセージ（左寄せ） */
.message-wrapper.ai-message {
    justify-content: flex-start;
    background: transparent;
}

.message-wrapper.ai-message .message-content {
    max-width: 60%;
    background: var(--bg-ai-message);
    padding: 16px 20px;
    margin: 0 auto 0 20%;
    color: var(--text-primary);
    font-size: 1rem;
    line-height: 1.6;
    word-wrap: break-word;
    border-radius: 16px;
}

/* ユーザーメッセージ（右寄せ） */
.message-wrapper.user-message {
    position: relative !important;
    justify-content: flex-end; /* 追加: ユーザーメッセージを右寄せ */
    background: transparent;
    position: relative;
}

.message-wrapper.user-message .user-message-stack {
    display: inline-flex;
    flex-direction: column;
    align-items: stretch;
    max-width: 60%;
    margin: 0 20% 0 auto;
    gap: 6px;
}

.message-wrapper.user-message.editing .user-message-stack {
    width: 100%;
    max-width: 60%;
    margin: 0 20% 0 auto;
}

.message-wrapper.user-message .message-content {
    position: relative;
    width: 100%;
    max-width: 100%;
    background: rgba(232, 228, 248, 0.95);
    color: var(--text-primary);
    border-radius: 20px 20px 4px 20px;
    border: 2px solid transparent;
    padding: 12px 18px;
    margin: 0;
    font-size: 1rem;
    line-height: 1.6;
    word-wrap: break-word;
    display: flex;
    flex-direction: column;
    text-align: left;
    box-shadow: 0 1px 4px rgba(112, 72, 187, 0.12);
    transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    .message-wrapper.user-message .message-content {
        background: rgba(58, 55, 88, 0.95);
        border-color: rgba(155, 131, 210, 0.4);
        box-shadow: 0 1px 6px rgba(37, 27, 68, 0.45);
    }
    
    .message-wrapper.user-message .message-content:hover {
        box-shadow: 0 4px 20px rgba(48, 33, 92, 0.6);
    }
}

.message-wrapper.user-message .user-message-actions {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    align-self: flex-end;
    margin: 0;
    gap: 6px;
}

.message-wrapper.user-message .user-message-actions .copy-btn,
.message-wrapper.user-message .user-message-actions .flag-btn,
.message-wrapper.user-message .user-message-actions .edit-btn {
    padding: 6px;
    width: var(--touch-target-min);
    height: var(--touch-target-min);
    gap: 0;
    border-radius: 10px;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.25s ease, transform 0.15s ease;
}

.message-wrapper.user-message .user-message-actions .copy-btn:hover,
.message-wrapper.user-message .user-message-actions .flag-btn:hover,
.message-wrapper.user-message .user-message-actions .edit-btn:hover {
    color: var(--text-primary);
}

@media (prefers-color-scheme: dark) {
    .message-wrapper.user-message .user-message-actions .copy-btn,
    .message-wrapper.user-message .user-message-actions .flag-btn,
    .message-wrapper.user-message .user-message-actions .edit-btn {
        color: rgba(243, 239, 255, 0.86);
    }

    .message-wrapper.user-message .user-message-actions .copy-btn:hover,
    .message-wrapper.user-message .user-message-actions .flag-btn:hover,
    .message-wrapper.user-message .user-message-actions .edit-btn:hover {
        color: #fff;
    }

    .flag-btn.flagged {
        background: rgba(167, 139, 250, 0.32);
        border-color: rgba(208, 160, 255, 0.55);
    }
}

.message-wrapper.user-message .message-text {
    margin-bottom: 0;
}


.message-wrapper.user-message.editing .message-content {
    background: rgba(232, 228, 248, 0.95);
    padding: 12px 18px;
}

@media (prefers-color-scheme: dark) {
    .message-wrapper.user-message.editing .message-content {
        background: rgba(58, 55, 88, 0.95);
    }
}

.message-edit-textarea {
    display: block;
    width: 100%;
    min-height: 120px;
    border-radius: 0;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    line-height: 1.6;
    padding: 0;
    resize: none;
    box-sizing: border-box;
}

.message-edit-textarea:focus {
    outline: none;
    border: none;
    box-shadow: none;
}

.message-edit-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 12px;
}

.edit-save-btn,
.edit-cancel-btn {
    border-radius: 999px;
    padding: 8px 18px;
    font-size: 0.9rem;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
}

.edit-save-btn {
    background: #000000;
    color: #fff;
}

.edit-cancel-btn {
    background: #fff;
    color: var(--text-primary);
}

.edit-cancel-btn:hover {
    background: #f5f5f5;
    color: var(--text-primary);
}

.message-wrapper.user-message.updating .edit-save-btn {
    opacity: 0.9;
    pointer-events: none;
}

.message-wrapper.user-message.updating .edit-cancel-btn {
    pointer-events: none;
    opacity: 0.9;
}

.message-wrapper.user-message .message-timestamp {
    font-size: 0.725rem;
    color: var(--text-muted);
    text-align: right;
    margin-top: 2px;
    align-self: flex-end;
}

/* ==================================================
   フラグボタン関連スタイル
   ================================================== */

/* フラグ済みメッセージの枠線 */
.message-wrapper.flagged .message-content {
    border: 2px solid #a251c7;
}

/* メッセージ内フラグボタン - 基本設定 */
.flag-btn {
    background: transparent;
    border-radius: 10px;
    cursor: pointer;
    outline: none;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.25s ease, transform 0.15s ease;
    color: var(--text-secondary);
    border: 1px solid transparent;
    padding: 6px 12px;
    line-height: 1;
    gap: 6px;
}

/* AI回答のフッター（タイムスタンプとアクション） */
.message-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 12px;
    padding-top: 8px;
    border-top: 1px solid var(--border-color, #e5e7eb);
}

.message-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* 共通のアクションボタンスタイル */
.copy-btn,
.regenerate-btn,
.flag-btn,
.edit-btn {
    background: transparent;
    border: 1px solid transparent;
    border-radius: 10px;
    padding: 6px 12px;
    cursor: pointer;
    outline: none;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: color 0.25s ease, transform 0.15s ease;
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1;
}

.copy-btn:hover,
.regenerate-btn:hover {
    color: var(--text-primary);
}

.flag-btn:hover,
.edit-btn:hover {
    color: var(--text-primary);
}

.regenerate-btn:hover .regenerate-icon {
    transform: rotate(180deg);
}

.copy-btn:disabled,
.regenerate-btn:disabled,
.flag-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.copy-btn:disabled .copy-icon,
.regenerate-btn:disabled .regenerate-icon,
.flag-btn:disabled .flag-icon {
    transform: none;
}

.copy-icon,
.regenerate-icon {
    transition: transform 0.3s ease;
    display: block;
    flex-shrink: 0;
}

.action-text {
    white-space: nowrap;
}

/* コピー成功時のアニメーション */
.copy-btn.copied {
    animation: copyPopup 0.25s ease-out;
}

.ai-message {
    position: relative;
}

@media (prefers-color-scheme: dark) {
    .message-footer {
        border-top-color: rgba(255, 255, 255, 0.1);
    }
    
    .copy-btn,
    .regenerate-btn,
    .flag-btn,
    .edit-btn {
        color: rgba(243, 239, 255, 0.86);
    }
    
    .copy-btn:hover,
    .regenerate-btn:hover,
    .flag-btn:hover,
    .edit-btn:hover {
        color: #fff;
    }
}

/* AIメッセージ内のコンテンツスタイル */
.message-wrapper.ai-message .message-content p {
    margin-bottom: 1em;
    line-height: 1.6;
}

.message-wrapper.ai-message .message-content p:last-child {
    margin-bottom: 0;
}

.message-wrapper.ai-message .message-content a {
    color: var(--text-link);
    text-decoration: underline;
}

.message-wrapper.ai-message .message-content a:hover {
    color: var(--text-link-hover);
}

/* 見出し */
.message-wrapper.ai-message .message-content h1,
.message-wrapper.ai-message .message-content h2,
.message-wrapper.ai-message .message-content h3,
.message-wrapper.ai-message .message-content h4,
.message-wrapper.ai-message .message-content h5,
.message-wrapper.ai-message .message-content h6 {
    margin-top: 1.5em;
    margin-bottom: 0.8em;
    font-weight: 600;
    line-height: 1.3;
    border-bottom: 1px solid var(--border-secondary);
    padding-bottom: 0.3em;
    color: var(--text-primary);
}

.message-wrapper.ai-message .message-content h1 { font-size: 1.7em; }
.message-wrapper.ai-message .message-content h2 { font-size: 1.5em; }
.message-wrapper.ai-message .message-content h3 { font-size: 1.3em; }
.message-wrapper.ai-message .message-content h4 { font-size: 1.1em; }

/* リスト */
.message-wrapper.ai-message .message-content ul,
.message-wrapper.ai-message .message-content ol {
    padding-left: 2em;
    margin-bottom: 1em;
}

.message-wrapper.ai-message .message-content li {
    margin-bottom: 0.4em;
}

.message-wrapper.ai-message .message-content ul li::marker {
    color: var(--text-primary);
}

/* 引用 */
.message-wrapper.ai-message .message-content blockquote {
    border-left: 4px solid var(--text-link);
    padding: 0.5em 1em;
    margin: 1em 0;
    color: var(--text-secondary);
    background-color: var(--bg-quote);
    border-radius: 0 4px 4px 0;
}

.message-wrapper.ai-message .message-content blockquote p:last-child {
    margin-bottom: 0;
}

/* インラインコード */
.message-wrapper.ai-message .message-content code:not(pre > code) {
    background-color: var(--bg-code);
    padding: 0.2em 0.4em;
    margin: 0 0.2em;
    font-size: 85%;
    border-radius: 6px;
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Courier, monospace;
    color: var(--text-primary);
}

/* removed legacy .codehilite styles (migrated to Shiki) */

/* 水平線 */
.message-wrapper.ai-message .message-content hr {
    border: 0;
    border-top: 2px solid var(--border-secondary);
    margin: 2em 0;
}

.message-timestamp {
    font-size: 0.75rem;
    color: var(--text-placeholder);
    text-align: right;
}
/* SVGアイコンのデフォルトの色 (主に枠線と棒のため) */
.flag-btn .flag-icon {
    color: var(--text-secondary); /* テーマ対応のグレー色 */
    transition: transform 0.3s ease, color 0.2s ease;
    /* stroke はSVG側で currentColor を参照 */
}

/* SVGの各パーツの表示制御 */
.flag-btn .flag-stick,
.flag-btn .flag-outline {
    display: inline; /* 棒と枠線は常に表示 */
}
.flag-btn .flag-fill {
    display: none;  /* 塗りつぶしは初期状態では非表示 */
}

.flag-btn.flagged .flag-icon { /* アイコン全体の色を指定 */
    color: var(--text-primary); /* フラグONで明るい色 */
}

.flag-btn.flagged .flag-fill {
    display: inline; /* 塗りつぶしを表示 */
    /* fill は .flag-btn.flagged .flag-icon の color を継承 */
}

.flag-btn.flagged {
    border-color: rgba(168, 85, 247, 0.5);
    color: var(--text-primary);
}
/* 固定フラグボタン - 削除され、新しい固定アクションボタンに置き換え */

/* 固定アクションボタン群 */
.fixed-action-buttons {
    position: fixed;
    bottom: calc(180px + env(safe-area-inset-bottom, 20px)); /* ページトップ/ボトムボタンの上にスペースを確保 */
    right: 32px;
    display: flex;
    flex-direction: column;
    gap: 18px;
    z-index: 999;
}

/* チャットページ用ページトップ/ボトムボタン位置調整 */
.page-top-btn {
    bottom: 102px; /* 固定アクションボタンの下、ボトムボタンの上 */
}

.page-bottom-btn {
    bottom: 32px; /* 最も下に配置 */
}
/* ===============================================
   固定アクションボタンのスタイル向上
   =============================================== */
.fixed-action-btn {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-btn);
    color: var(--text-color);
    box-shadow: none;
    position: relative;
    overflow: hidden;
    /* 極小画面でもテキストが被って読みにくくならないように背景をぼかす */
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
}

.fixed-action-btn.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.fixed-action-btn:hover {
    background: var(--bg-btn-hover);
}

.fixed-action-btn .material-symbols-outlined {
    font-size: 24px;
    color: var(--text-color);
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

/* 固定コメントボタン */
#fixed-comment-btn {
    /* 常に表示 */
    opacity: 1;
    visibility: visible;
    color: var(--text-color);
}

#fixed-comment-btn.active .material-symbols-outlined {
    color: var(--bg-primary);
}

/* コメントボタンのラッパー */
.fixed-action-btn-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

/* コメントボタンのコメント数表示 */
.comment-btn-count {
    font-size: 12px;
    font-weight: 400;
    line-height: 1;
    color: var(--text-color);
    white-space: nowrap;
}

#fixed-flag-btn .material-symbols-outlined {
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

#fixed-flag-btn.flagged-active .material-symbols-outlined {
    color: var(--text-color);
    font-variation-settings: 'FILL' 1, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

/* モバイル対応 (600px以下) - 統合版 */
@media (max-width: 600px) {
    /* 固定アクションボタン - 入力欄の右外側に配置 */
    .fixed-action-buttons {
        bottom: calc(14px + env(safe-area-inset-bottom, 12px));
        right: 6px;
        gap: 6px;
        opacity: 0.85;
        transition: opacity 0.3s ease;
    }
    
    .fixed-action-buttons:hover {
        opacity: 1;
    }
    
    .fixed-action-btn {
        width: 38px;
        height: 38px;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
        opacity: 0.9;
    }
    
    .fixed-action-btn:hover {
        opacity: 1;
    }
    
    .fixed-action-btn .material-symbols-outlined {
        font-size: 18px;
    }
    
    /* chat-disclaimerを非表示 */
    .chat-disclaimer {
        display: none !important;
    }
    
    /* ページトップ/ボトムボタンを完全非表示 */
    .page-top-btn,
    .page-bottom-btn {
        display: none !important;
    }
    
    /* コンテナ */
    .container {
        padding-left: 0 !important;
        padding-right: 0 !important;
    }
    
    /* メッセージ入力欄 - 右側に固定ボタン用スペースを確保 */
    .chat-input-form {
        width: calc(100% - 74px);
        max-width: calc(100% - 74px);
        left: calc(50% - 22px);
        border-radius: 28px;
        bottom: calc(12px + env(safe-area-inset-bottom, 12px));
        padding: 6px 10px;
    }
    
    /* 追加ボタンとモーダルをモバイルで調整 */
    .add-features-btn {
        width: var(--touch-target-min);
        height: var(--touch-target-min);
    }
    
    .add-features-modal {
        bottom: calc(100% + 8px);
        left: 0;
        right: auto;
        max-width: calc(100vw - 48px);
        min-width: 240px;
    }
    
    .send-btn {
        height: var(--touch-target-min);
        width: var(--touch-target-min);
        min-width: var(--touch-target-min);
        padding: 5px;
    }
    
    .send-btn svg {
        width: 16px;
        height: 16px;
    }

    /* モバイル: ツールボタンのラベルを非表示 */
    .tools-btn-label {
        display: none;
    }

    /* モバイル: モデル名を短縮 */
    .chat-model-name {
        max-width: 100px;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    
    /* ヘッダー - コンパクト化 */
    .chat-header {
        height: 52px;
        padding: 0 12px;
    }
    
    .chat-title {
        font-size: 0.95rem;
        line-height: 1.3;
    }
    
    .header-left a {
        padding: 6px 12px;
        font-size: 0.85rem;
        gap: 4px;
        display: inline-flex !important;
        align-items: center !important;
        justify-content: center !important;
    }
    
    .header-left a svg {
        margin: 0 auto !important;
    }
    
    /* チャットコンテナ - 表示領域を最大化 */
    #chat-container {
        padding-bottom: calc(80px + env(safe-area-inset-bottom, 20px));
        max-height: calc(100dvh - 52px - 80px);
        height: calc(100dvh - 52px - 80px);
    }
    
    /* メッセージ表示 - 可読性を保ちつつコンパクト化 */
    .message-wrapper {
        padding: 10px 12px;
        margin-bottom: 8px;
    }
    
    .message-wrapper.ai-message .message-content {
        max-width: 92%;
    }

    .message-wrapper.user-message .user-message-stack {
        max-width: 60%;
        margin: 0 20% 0 auto;
    }

    .message-wrapper.user-message .message-content,
    .message-wrapper.ai-message .message-content {
        padding: 10px 14px;
        font-size: 0.925rem;
        line-height: 1.5;
    }
    
    /* 入力欄内部 - 高さを削減 */
    .textarea-section {
        padding: 6px 10px 4px 10px;
        min-height: var(--touch-target-min);
    }
    
    .textarea-section textarea {
        min-height: 18px;
        font-size: 16px;
        padding: 6px 4px 6px 8px;
        line-height: 1.35;
    }
    
    .bottom-bar {
        padding: 4px 10px 6px 10px;
    }
}
/* === チャットタイプバッジスタイル === */
.chat-type-indicator {
    margin-top: 8px;
}

.chat-type-badge {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    padding: 4px 10px;
    border-radius: 16px;
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: none;
    white-space: nowrap;
    background: var(--accent-secondary);
    color: var(--text-secondary);
}

.chat-type-badge.private {
    background: rgba(61, 239, 103, 0.2);
    color: var(--private-svg-color);
}

.chat-type-badge.open {
    background: rgba(255, 198, 129, 0.3);
    color: var(--open-svg-color);
}

/* ダークモード用のチャットタイプバッジ */
@media (prefers-color-scheme: dark) {
    .chat-type-badge.private {
        background: #2a4a2a;
        color: var(--private-svg-color);
    }

    .chat-type-badge.open {
        background: #6a4222;
        color: var(--open-svg-color);
    }
}

.chat-type-badge svg {
    width: 14px;
    height: 14px;
}

/* プライベートチャット用の鍵アイコンスタイル */
.lock-icon {
    margin-right: 6px;
    color: inherit;
    transition: all 0.2s ease;
}

.chat-type-badge.private .lock-icon {
    color: #22863a;
}

/* ダークモード用の鍵アイコン */
@media (prefers-color-scheme: dark) {
    .chat-type-badge.private .lock-icon {
        color: #84d684;
    }
}

/* === チャット入力無効化スタイル === */
.chat-input-disabled {
    position: fixed;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 64px);
    max-width: 50%;
    padding: 16px 20px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-primary);
    border-radius: 14px;
    margin: 20px 16px;
    box-shadow: 0 2px 8px var(--shadow-primary);
}

.disabled-message {
    text-align: center;
    color: var(--text-secondary);
}

.disabled-message p {
    margin: 0;
    font-size: 0.875rem;
    line-height: 1.4;
    color: var(--text-primary);
}

.disabled-message .sub-message {
    margin-top: 6px;
    font-size: 0.8rem;
    color: var(--text-muted);
    opacity: 0.8;
}

/* チャット固有のアイコンスタイル */
.chat-header .add-icon {
    font-size: 17px;
    color: var(--text-primary);
    margin-right: 6px;
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

.chat-header .groups-icon {
    font-size: 18px;
    color: inherit;
    margin-right: 6px;
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

/* Material Symbols の基本設定をチャットページでも適用 */
.material-symbols-outlined {
    font-family: 'Material Symbols Outlined', 'Material Icons', sans-serif;
    font-weight: normal;
    font-style: normal;
    line-height: 1;
    letter-spacing: normal;
    text-transform: none;
    display: inline-block;
    white-space: nowrap;
    word-wrap: normal;
    direction: ltr;
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
    font-feature-settings: 'liga';
    -webkit-font-smoothing: antialiased;
    vertical-align: middle;
    user-select: none;
}

/* Material Symbols: flag icon variants */
.material-symbols-outlined.flag-icon[data-fill="1"],
.material-symbols-outlined.flag-icon.active {
    font-variation-settings: 'FILL' 1, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

/* Material Symbols: thumb-up icon for comments */
.material-symbols-outlined.thumb-up-icon {
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 20;
    transition: all 0.2s ease;
    color: #606060;
}

.comment-like-btn .material-symbols-outlined.thumb-up-icon.liked {
    font-variation-settings: 'FILL' 1, 'wght' 500, 'GRAD' 0, 'opsz' 20 !important;
    color: #030303 !important;
}

@media (prefers-color-scheme: dark) {
    .comment-like-btn .material-symbols-outlined.thumb-up-icon.liked {
        color: #fff !important;
    }
}

/* フォールバック通知バナー */
.fallback-notice-banner {
    display: none;
    background: #fef3cd;
    color: #856404;
    border: 1px solid #ffc107;
    border-radius: 8px;
    padding: 12px 16px;
    margin: 8px 16px;
    align-items: center;
    gap: 8px;
}

.fallback-notice-close {
    margin-left: auto;
    background: none;
    border: none;
    color: #856404;
    cursor: pointer;
    font-size: 18px;
    padding: 0 4px;
}

@media (prefers-color-scheme: dark) {
    .fallback-notice-banner {
        background: #3a3000;
        color: #ffc107;
        border-color: #665800;
    }
    .fallback-notice-close {
        color: #ffc107;
    }
}

/* ローディング中のメッセージコンテンツ */
.message-content.loading-content {
    display: flex;
    align-items: center;
    padding: 8px 0;
    min-height: 48px;
}

/* チャットエラーメッセージ */
.chat-error-message {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: #ff4444;
    color: white;
    padding: 12px 20px;
    border-radius: 8px;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    font-size: 14px;
    max-width: 400px;
    text-align: center;
    animation: chatErrorSlideDown 0.2s ease-out;
}

@keyframes chatErrorSlideDown {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* フォルダアイコンのスタイル */
.thread-list-link .folder-icon {
    margin-right: 6px;
    color: var(--text-primary);
    transition: all 0.2s ease;
}

/* ページトップボタンは base_v2.css で統一管理 */

/* 高機能Markdownスタイル - ChatGPT風のリッチテキスト表示 */

/* ==== 基本的なテキスト要素 ==== */
/* 見出しサイズは後方の「Markdown要素の強化スタイル」セクションで定義 */

.message-content p {
    margin-bottom: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
}

.message-content strong, .message-content b {
    font-weight: 600;
    color: var(--text-primary);
}

.message-content em, .message-content i {
    font-style: italic;
    color: var(--text-secondary);
}

.message-content u {
    text-decoration: underline;
    text-decoration-color: var(--text-link);
}

.message-content s, .message-content del {
    text-decoration: line-through;
    color: var(--text-muted);
}

.message-content ins {
    background-color: rgba(132, 214, 132, 0.3);
    text-decoration: none;
    padding: 0.125rem 0.25rem;
    border-radius: 0.25rem;
}

.message-content mark {
    background-color: rgba(214, 166, 116, 0.4);
    padding: 0.125rem 0.25rem;
    border-radius: 0.25rem;
    color: var(--text-primary);
}

.message-content sub, .message-content sup {
    font-size: 0.75em;
    line-height: 0;
    position: relative;
    vertical-align: baseline;
}

.message-content sub { bottom: -0.25em; }
.message-content sup { top: -0.5em; }

/* ==== リスト ==== */
.message-content ul, .message-content ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.message-content ul li, .message-content ol li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
    color: var(--text-primary);
}

.message-content ul {
    list-style-type: disc;
}

.message-content ol {
    list-style-type: decimal;
}

/* ==== チェックリスト ==== */
.message-content ul.task-list {
    list-style: none;
    padding-left: 0;
}

.message-content ul.task-list li {
    position: relative;
    padding-left: 2rem;
    margin-bottom: 0.5rem;
}

.message-content ul.task-list li input[type="checkbox"] {
    position: absolute;
    left: 0;
    top: 0.2rem;
    width: 1rem;
    height: 1rem;
    margin: 0;
    cursor: pointer;
    accent-color: #6366f1;
}

.message-content ul.task-list li input[type="checkbox"]:checked + label {
    color: var(--text-muted);
    text-decoration: line-through;
}

/* ==== 引用 ==== */
.message-content blockquote {
    margin: 1rem 0;
    padding: 0.75rem 1rem;
    border-left: 4px solid var(--text-link);
    background-color: var(--bg-secondary);
    border-radius: 0 0.375rem 0.375rem 0;
    font-style: italic;
    color: var(--text-secondary);
}

.message-content blockquote p {
    margin-bottom: 0;
}

/* ==== コードブロック / Shikiハイライト (詳細レイアウトは chat-code-highlight.css 側で管理) ==== */
/* Shikiに完全統一したため、.highlightスタイルは削除 */

/* ==== 水平線 ==== */
.message-content hr {
    border: none;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--border-secondary), transparent);
    margin: 2rem 0;
}

/* ==== 定義リスト ==== */
.message-content dl {
    margin: 1rem 0;
}

.message-content dt {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.message-content dd {
    margin-left: 1rem;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
}

/* ==== 詳細・折りたたみ ==== */
.message-content details {
    margin: 1rem 0;
    border: 1px solid var(--border-secondary);
    border-radius: 0.5rem;
    overflow: hidden;
}

.message-content summary {
    background-color: var(--bg-secondary);
    padding: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    border-bottom: 1px solid var(--border-secondary);
    transition: background-color 0.2s;
    color: var(--text-primary);
}

.message-content summary:hover {
    background-color: var(--bg-btn);
}

.message-content details[open] summary {
    background-color: var(--text-link);
    color: #ffffff;
}

.message-content details > *:not(summary) {
    padding: 0.75rem;
    background-color: var(--bg-secondary);
}

/* ==== 数式 ==== */
.message-content .arithmatex {
    font-family: 'KaTeX_Main', 'Times New Roman', serif;
    font-size: 1.1em;
}

.message-content .arithmatex.block {
    text-align: center;
    margin: 1rem 0;
    padding: 0.5rem;
    background-color: var(--bg-secondary);
    border-radius: 0.375rem;
}

.message-content .arithmatex.inline {
    display: inline;
    margin: 0 0.25rem;
}

/* ==== キーボードキー ==== */
.message-content kbd {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-secondary);
    border-radius: 0.25rem;
    box-shadow: 0 1px 2px var(--shadow-primary);
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
}

/* ==== 脚注 ==== */
.message-content .footnote {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 2rem;
    border-top: 1px solid var(--border-secondary);
    padding-top: 1rem;
}

.message-content .footnote-ref {
    color: var(--text-link);
    text-decoration: none;
    font-size: 0.875rem;
    vertical-align: super;
}

.message-content .footnote-ref:hover {
    text-decoration: underline;
}

/* ==== 略語 ==== */
.message-content abbr {
    border-bottom: 1px dotted var(--text-muted);
    cursor: help;
}

/* ==== リンク ==== */
.message-content a {
    color: var(--text-link);
    text-decoration: none;
    transition: color 0.2s;
}

.message-content a:hover {
    color: var(--text-link-hover);
    text-decoration: underline;
}

.message-content a:visited {
    color: var(--text-secondary);
}

/* ==== 画像 ==== */
.message-content img {
    max-width: 100%;
    height: auto;
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin: 1rem 0;
}

/* ==== レスポンシブデザイン ==== */
@media (max-width: 768px) {
    .message-content {
        font-size: 0.875rem;
    }
    
    .message-content h1 { font-size: 1.5rem; }
    .message-content h2 { font-size: 1.25rem; }
    .message-content h3 { font-size: 1.125rem; }
    .message-content h4 { font-size: 1rem; }
    .message-content h5 { font-size: 0.875rem; }
    .message-content h6 { font-size: 0.75rem; }
    
    .message-content pre {
        font-size: 0.75rem;
        padding: 0.75rem;
    }
    
}

/* ==== 全体のスタイル一貫性 ==== */
.message-content {
    font-family: 'Noto Sans JP', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
    word-wrap: break-word;
    overflow-wrap: break-word;
    font-weight: 400;
}

/* ==== 番号付きリストの改善 ==== */
.message-content ol {
    counter-reset: item;
    padding-left: 0;
}

.message-content ol > li {
    display: block;
    margin-bottom: 0.5rem;
    padding-left: 2rem;
    position: relative;
}

.message-content ol > li:before {
    content: counter(item) ".";
    counter-increment: item;
    position: absolute;
    left: 0;
    top: 0;
    color: #8fa8d8;
    font-weight: 600;
}

/* ==== 目次 ==== */
.message-content .toc {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-secondary);
    border-radius: 0.5rem;
    padding: 1rem;
    margin: 1rem 0;
}

.message-content .toc ul {
    list-style: none;
    padding-left: 0;
}

.message-content .toc li {
    margin-bottom: 0.25rem;
}

.message-content .toc a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.message-content .toc a:hover {
    color: var(--text-link);
    text-decoration: underline;
}

/* ==== 最後の要素のマージン調整 ==== */
.message-content > *:last-child {
    margin-bottom: 0;
}

.message-content > *:first-child {
    margin-top: 0;
}

/* === ChatGPT風Markdownスタイル === */

/* コードブロック */


/* 引用 */
.chatgpt-quote {
    border-left: 4px solid var(--text-link);
    padding: 12px 16px;
    margin: 16px 0;
    background: var(--bg-secondary);
    font-style: italic;
    color: var(--text-secondary);
}

/* リスト項目の改善 */
.message-content ul,
.message-content ol {
    padding-left: 24px;
    margin: 12px 0;
    line-height: 1.8;
}

.message-content ul {
    list-style-type: disc;
}

.message-content ol {
    list-style-type: decimal;
}

.message-content li {
    margin: 6px 0;
    line-height: 1.6;
    padding-left: 4px;
}

.message-content li > ul,
.message-content li > ol {
    margin-top: 4px;
    margin-bottom: 4px;
}

/* ネストされたリスト */
.message-content ul ul {
    list-style-type: circle;
    margin-top: 4px;
}

.message-content ul ul ul {
    list-style-type: square;
}

.message-content ol ol {
    list-style-type: lower-alpha;
    margin-top: 4px;
}

.message-content ol ol ol {
    list-style-type: lower-roman;
}

/* 見出しの改善 */
.message-content h1,
.message-content h2,
.message-content h3,
.message-content h4,
.message-content h5,
.message-content h6 {
    margin: 20px 0 12px 0;
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-primary);
}

.message-content h1 { font-size: 1.8em; }
.message-content h2 { font-size: 1.6em; }
.message-content h3 { font-size: 1.4em; }
.message-content h4 { font-size: 1.2em; }
.message-content h5 { font-size: 1.1em; }
.message-content h6 { font-size: 1em; }

/* 段落の改善 */
.message-content p {
    margin: 12px 0;
    line-height: 1.6;
    color: var(--text-primary);
}

/* 水平線 */
.message-content hr {
    border: none;
    border-top: 1px solid var(--border-secondary);
    margin: 20px 0;
}

/* === 質問品質スコア表示（チャットページ専用） === */
.header-center {
    grid-column: 2;
    justify-self: center;
    display: flex;
    align-items: center;
    gap: 16px;
    min-width: 0;
}

/* チャットヘッダーのレイアウト調整 */
.chat-header {
    grid-template-columns: 1fr auto 1fr;
    gap: 12px;
}

.chat-title-center {
    grid-column: 2;
    justify-self: center;
    text-align: center;
    min-width: 0;
    overflow: hidden;
}

.header-right {
    grid-column: 3;
    justify-self: end;
    display: flex;
    align-items: center;
    gap: 12px;
}

/* スコアとチャットタイプの横並びコンテナ */
.score-and-type-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* === Simple Modern Score Badge (Light) === */
.quality-score-display {
    --score-bg: #ffffff1e;
    position: relative;
    display: inline-flex;
    align-items: baseline;
    gap: 6px;
    padding: 6px 14px;
    background: var(--score-bg);
    border: 1px solid var(--score-border);
    border-radius: 10px;
    box-shadow: var(--score-shadow);
    transition: background .18s ease, border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}
.quality-score-display::before,
.quality-score-display::after { content: none !important; }
.quality-score-display:hover { background:#f9fafb;}
.quality-score-display:active { transform:translateY(1px); }
.quality-score-display.mounted { animation: badgePop .35s ease-out; }

 .score-label { font-size:0.68rem; font-weight:600; color:#6b7280; letter-spacing:.5px; text-transform:uppercase; }

 .score-value { font-size:.95rem; font-weight:700; font-family:'Noto Sans JP',ui-monospace,'Cascadia Code','Source Code Pro',Menlo,Consolas,'DejaVu Sans Mono',monospace; color:#111827; letter-spacing:.25px; transition:color .18s ease; }

 .score-value.animate { animation: scoreCount .55s ease-out forwards; }

/* マウント時の軽いポップイン */
/* pop already simplified */

/* 完了パルス用（JSのstyle.animationでも使用） */
@keyframes scorePulse { 0%{transform:scale(1);} 45%{transform:scale(1.05);} 100%{transform:scale(1);} }

/* 数値更新の視覚的スムージング（軽い浮き上がり） */
@keyframes scoreCount {
    0% { transform: translateY(4px); opacity: 0.0; }
    50% { transform: translateY(0); opacity: 1; }
    100% { transform: translateY(0); opacity: 1; }
}

/* バッジのポップイン */
@keyframes badgePop {
    0% { transform: scale(0.98); opacity: 0; }
    60% { transform: scale(1.03); opacity: 1; }
    100% { transform: scale(1); }
}

/* シマー演出 */
/* shimmer removed for simplicity */

/* ダークモード最適化 */
@media (prefers-color-scheme: dark) {
    .quality-score-display { --score-bg:#1f2937; --score-border:#374151; --score-shadow:0 1px 2px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.04) inset; background:var(--score-bg); border-color:var(--score-border); box-shadow:var(--score-shadow); }
    .quality-score-display:hover { background:#243044; border-color:#4b5563; box-shadow:0 2px 6px rgba(0,0,0,0.55); }
    .score-label { color:#9ca3af; }
    .score-value { color:#f3f4f6; }
}

/* 低モーション設定のユーザーに配慮 */
@media (prefers-reduced-motion: reduce) {
    .quality-score-display,
    .quality-score-display::after,
    .score-value.animate,
    .quality-score-display.mounted {
        animation: none !important;
        transition: none !important;
    }
}

/* レスポンシブデザイン - 768px以下はシングル行レイアウト */
@media (max-width: 768px) {
    .chat-header {
        grid-template-columns: auto 1fr auto; /* 左・中央・右の3列 */
        grid-template-rows: 1fr; /* 単一行 */
        gap: 8px;
        height: 52px; /* 固定高さ */
        padding: 0 12px;
        align-items: center;
    }
    
    .header-left {
        grid-column: 1;
        justify-self: start;
    }
    
    /* スレッド一覧・質問投稿ボタン - アイコンのみ表示 */
    .header-left a {
        padding: 8px; /* 正方形に */
        width: var(--touch-target-min);
        height: var(--touch-target-min);
        border-radius: 50%; /* 円形ボタン */
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 0; /* テキストを非表示 */
    }
    
    .header-left a svg {
        width: 20px;
        height: 20px;
        margin: 0; /* 余白をリセット */
    }
    
    .chat-title-center {
        grid-column: 2;
        justify-self: center;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        max-width: 100%;
    }
    
    .chat-title {
        font-size: 0.9rem;
        font-weight: 600;
    }
    
    .header-right {
        grid-column: 3;
        justify-self: end;
    }
    
    /* スコアとタイプコンテナ */
    .score-and-type-container {
        flex-direction: row;
        gap: 8px;
        align-items: center;
    }
    
    /* スコア表示を完全に非表示 */
    .quality-score-display {
        display: none !important;
    }
    
    /* チャットタイプバッジ - アイコンのみ */
    .chat-type-badge {
        padding: 6px; /* 正方形に */
        width: var(--touch-target-min);
        height: var(--touch-target-min);
        border-radius: 50%; /* 円形 */
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 0; /* テキストを非表示 */
        border-width: 1px;
    }
    
    .chat-type-badge svg,
    .chat-type-badge .material-symbols-outlined {
        width: 20px;
        height: 20px;
        padding: 0 0 0 2px;
        margin: 0;
        font-size: 20px;
    }
    
    /* chat-disclaimerを非表示 */
    .chat-disclaimer {
        display: none !important;
    }
    
    /* メッセージ表示 - 左右寄せを適切に設定 */
    .message-wrapper.user-message {
        justify-content: flex-end; /* 右寄せ */
    }
    
    .message-wrapper.ai-message {
        justify-content: flex-start; /* 左寄せ */
    }
    
    .message-wrapper.user-message .user-message-stack {
        margin: 0 20% 0 auto; /* 右寄せ */
        max-width: 60%;
    }
    
    .message-wrapper.ai-message .message-content {
        margin: 0 auto 0 8%; /* 左寄せ */
        max-width: 85%;
    }
    
    /* 固定アクションボタン - 小型化・半透明化・縦整列 */
    .fixed-action-buttons {
        opacity: 0.7;
        transition: opacity 0.3s ease;
        flex-direction: column;
        gap: 10px;
        bottom: 104px;
        right: 18px;
    }
    
    .fixed-action-buttons:hover {
        opacity: 1;
    }
    
    .fixed-action-btn {
        width: 44px;
        height: 44px;
        box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
        opacity: 0.85;
    }
    
    .fixed-action-btn:hover {
        opacity: 1;
    }
    
    .fixed-action-btn .material-symbols-outlined {
        font-size: 20px;
    }
    
    /* フラグボタン アイコンサイズの最適化 */
    #fixed-flag-btn svg {
        width: 18px; /* 20px→18px */
        height: 18px;
    }
    
    /* ページトップ/ボトムボタンを完全非表示 */
    .page-top-btn,
    .page-bottom-btn {
        display: none !important;
    }
    
    /* メッセージ入力不可表示 */
    .chat-input-disabled {
        padding: 16px;
        max-width: 90%;
        bottom: 12px;
        border-radius: 12px;
    }
    
    .disabled-message p {
        font-size: 0;
        line-height: 1.4;
    }
    
    .disabled-message .sub-message {
        font-size: 0.75rem;
        margin-top: 4px;
    }
    
    .disabled-message p::before {
        content: "🔒 ";
    }
    
    .disabled-message p::after {
        content: "プライベートチャット（閲覧のみ）";
        font-size: 0.875rem;
    }
    
    .disabled-message .sub-message {
        display: none;
    }
}

/* ===============================================
   コメント機能 (YouTubeライク)
   =============================================== */

.comment-section {
    position: fixed;
    top: 0;
    right: 0;
    width: 420px;
    height: 100dvh;
    background: var(--bg-primary, #ffffff);
    border-left: 1px solid var(--border-primary, #e0e0e0);
    display: flex;
    flex-direction: column;
    z-index: var(--z-modal);
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    box-shadow: -2px 0 10px rgba(0,0,0,0.1);
}

.comment-section.visible {
    transform: translateX(0);
}

.comment-section.fullscreen {
    width: 100vw;
    height: 100dvh;
    border: none;
    z-index: var(--z-toast);
}

.comment-header-with-close {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-primary, #e0e0e0);
}

.comment-section-title {
    font-size: 16px;
    font-weight: 600;
    margin: 0;
}

.comment-header-actions {
    display: flex;
    gap: 12px;
}

.comment-header-actions button {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-color, #333);
}

.comments-list {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    padding-bottom: calc(140px + env(safe-area-inset-bottom, 20px)); /* Space for input form */
}

/* === YouTube-style Comment Form === */
.comment-form-container {
    padding: 12px 20px;
    border-top: 1px solid var(--border-primary, #e0e0e0);
    background: var(--bg-primary, #ffffff);
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
}


.character-avatar-container {
    flex-shrink: 0;
    width: var(--touch-target-min);
    height: var(--touch-target-min);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.comment-user-avatar, .character-avatar {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    object-position: center;
    display: block;
}

.comment-input-area {
    display: flex;
    gap: 12px;
    align-items: center;
}

.yt-comment-avatar {
    flex-shrink: 0;
    width: var(--touch-target-min);
    height: var(--touch-target-min);
    border-radius: 50%;
    overflow: hidden;
    object-fit: cover;
    object-position: center;
    display: block;
}

.yt-avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.comment-input-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
}

.comment-textarea {
    width: 100%;
    min-height: 20px;
    max-height: 80px;
    border: none !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    background: transparent;
    resize: none;
    outline: none !important;
    padding: 6px 0;
    font-family: inherit;
    font-size: 14px;
    line-height: 1.4;
    color: var(--text-primary, #0f0f0f);
    overflow-y: hidden;
    box-sizing: border-box;
}

.comment-textarea:focus {
    border: none !important;
    box-shadow: none !important;
    outline: none !important;
}

.comment-textarea::placeholder {
    color: var(--text-muted, #4b5563);
    font-size: 14px;
}

/* Underline Animation */
.textarea-wrapper::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background-color: var(--border-secondary, #ccc);
}

.yt-input-underline {
    position: absolute;
    bottom: 0px; 
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--text-primary, #0f0f0f);
    transition: all 0.25s ease-out;
    z-index: 1;
}
.comment-textarea:focus ~ .yt-input-underline {
    width: 100%;
    left: 0;
}

.comment-form-buttons {
    display: none; /* JS will toggle to flex */
    justify-content: flex-end;
    gap: 8px;
    margin-top: 8px;
    opacity: 0;
    transform: translateY(-4px);
    transition: opacity 0.2s, transform 0.2s;
}

.comment-form-buttons.visible {
    opacity: 1;
    transform: translateY(0);
}

.comment-form-buttons.hiding {
    opacity: 0;
    pointer-events: none;
}

.comment-cancel-btn, .comment-submit-btn {
    min-height: var(--touch-target-min);
    min-width: var(--touch-target-min);
    border: none;
    border-radius: 18px;
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    background: transparent;
}

.comment-cancel-btn {
    color: var(--text-primary, #0f0f0f);
}

.comment-cancel-btn:hover {
    background: var(--bg-hover, #f2f2f2);
}

.comment-submit-btn {
    background: var(--bg-disabled, #f2f2f2);
    color: var(--text-disabled, #909090);
    cursor: not-allowed;
}

.comment-submit-btn.enabled {
    background: #065fd4;
    color: #fff;
    cursor: pointer;
}
.comment-submit-btn.enabled:hover {
    background: #0056b3;
}

/* === YouTube-style Comment List Item === */
.yt-comment-item {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.yt-comment-content {
    flex: 1;
}

.yt-comment-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;
}

.yt-comment-author {
    font-weight: 500;
    font-size: 13px;
    color: var(--text-primary, #0f0f0f);
}

.yt-comment-author.is-current-author {
    background: var(--bg-secondary, #f2f2f2);
    padding: 2px 6px;
    border-radius: 8px;
}

.yt-comment-timestamp {
    font-size: 12px;
    color: var(--text-muted, #606060);
    white-space: nowrap;
}

.yt-comment-time {
    font-size: 12px;
    color: var(--text-muted, #606060);
    white-space: nowrap;
}

.yt-comment-text {
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-primary, #0f0f0f);
    margin-bottom: 8px;
    word-break: break-word;
}

.yt-comment-actions {
    display: flex;
    align-items: center;
}

.comment-like-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted, #606060);
    padding: 4px 8px;
    border-radius: 16px;
    transition: background 0.2s, color 0.2s;
}

.comment-like-btn .like-icon {
    font-size: 18px;
    font-variation-settings: 'FILL' 0;
    transition: font-variation-settings 0.2s;
}

.comment-like-btn.liked {
    color: var(--text-primary, #0f0f0f);
}

.comment-like-btn.liked .like-icon {
    font-variation-settings: 'FILL' 1;
}

.comment-like-btn:hover {
    background: var(--bg-hover, #f2f2f2);
}

.yt-thumb-icon {
    font-size: 18px;
}

.like-count {
    font-size: 12px;
}

/* ダークモード対応 */
@media (prefers-color-scheme: dark) {
    .yt-comment-author, .yt-comment-text, .comment-textarea, .comment-cancel-btn {
        color: #f1f1f1;
    }
    .yt-comment-timestamp, .yt-comment-time, .comment-textarea::placeholder, .comment-submit-btn {
        color: #aaaaaa;
    }
    .yt-input-underline {
        background-color: #f1f1f1;
    }
    .comment-textarea {
        border-bottom-color: #3f3f3f;
    }
    .yt-comment-author.is-current-author {
        background: #272727;
    }
    .comment-cancel-btn:hover, .comment-like-btn:hover {
        background: #3f3f3f;
    }
    .comment-like-btn.liked {
        color: #f1f1f1;
    }
    .comment-submit-btn {
        background: #272727;
    }
    .comment-submit-btn.enabled {
        background: #3ea6ff;
        color: #0f0f0f;
    }
}


.message-wrapper.send-failed .message-content { opacity: 1; border: 1px solid #e11d48; }

/* ================================================
   480px以下 - 超小型デバイス最適化（統合版）
   ================================================ */
@media (max-width: 480px) {
    /* ヘッダー - コンパクト化 */
    .chat-header {
        height: 48px;
        padding: 0 8px;
        gap: 4px;
    }
    
    .chat-title {
        font-size: 0.85rem;
    }
    
    /* ヘッダーボタン - アイコンのみ、小型化 */
    .header-left a {
        display: inline-flex !important;
        align-items: center !important;
        justify-content: center !important;
        padding: 0 !important;
        width: 36px !important;
        height: 36px !important;
        font-size: 0;
        border-radius: 50%;
    }
    
    .header-left a svg {
        width: 18px !important;
        height: 18px !important;
        margin: 0 !important;
    }
    
    .header-left a.post-link svg {
        width: 18px !important;
        height: 18px !important;
    }
    
    .thread-list-link svg {
        width: 18px !important;
        height: 18px !important;
        margin: 0 !important;
    }
    
    /* チャットタイプバッジ - アイコンのみ小型化 */
    .chat-type-badge {
        padding: 4px;
        width: 36px;
        height: 36px;
        font-size: 0;
        border-radius: 50%;
        justify-content: center;
    }
    
    .chat-type-badge svg,
    .chat-type-badge .material-symbols-outlined {
        width: 16px;
        height: 16px;
        font-size: 16px;
    }
    
    /* スコア非表示 */
    .quality-score-display {
        display: none !important;
    }
    
    /* chat-disclaimer非表示 */
    .chat-disclaimer {
        display: none !important;
    }
    
    /* チャットコンテナ - 表示領域最大化 */
    #chat-container {
        padding: 0 10px calc(80px + env(safe-area-inset-bottom, 16px)) 10px;
        max-height: calc(100dvh - 48px - 80px);
        height: calc(100dvh - 48px - 80px);
    }
    
    /* メッセージ入力欄 - 右側に固定ボタン用スペースを確保 */
    .chat-input-form {
        width: calc(100% - 66px);
        max-width: calc(100% - 66px);
        left: calc(50% - 20px);
        bottom: calc(10px + env(safe-area-inset-bottom, 10px));
        border-radius: 24px;
        padding: 4px 8px;
    }
    
    .textarea-section {
        padding: 4px 6px 2px 6px;
        min-height: 28px;
    }
    
    .textarea-section textarea {
        min-height: 16px;
        font-size: 16px;
        padding: 4px 4px 4px 6px;
        line-height: 1.3;
    }
    
    .bottom-bar {
        padding: 2px 6px 4px 6px;
    }
    
    .send-btn {
        width: 30px;
        height: 30px;
        min-width: 30px;
    }
    
    .send-btn svg {
        width: 14px;
        height: 14px;
    }
    
    /* メッセージ表示 - 画面幅フル活用 */
    .message-wrapper {
        padding: 8px 8px;
        margin-bottom: 6px;
    }
    
    .message-wrapper.ai-message .message-content {
        max-width: 94%;
    }

    .message-wrapper.user-message .user-message-stack {
        max-width: 80%;
        margin: 0;
        margin-left: auto;
    }

    .message-wrapper.user-message .message-content,
    .message-wrapper.ai-message .message-content {
        padding: 10px 12px;
        font-size: 0.9rem;
        line-height: 1.5;
    }
    
    .message-wrapper.ai-message .message-content {
        margin: 0 auto 0 4%;
    }
    
    .message-content {
        font-size: 15px;
        line-height: 1.6;
    }
    
    /* ユーザーメッセージを右寄せ */
    .message-wrapper.user-message {
        display: flex;
        justify-content: flex-end;
        width: 100%;
    }
    
    .message-wrapper.user-message .message-content {
        background: rgba(232, 228, 248, 0.95);
        border-radius: 18px 18px 4px 18px;
        padding: 12px 14px;
    }
    
    /* AIメッセージは左寄せ */
    .message-wrapper:not(.user-message) {
        justify-content: flex-start;
    }
    
    /* 固定アクションボタン - 入力フォーム右外に配置 */
    .fixed-action-buttons {
        bottom: calc(12px + env(safe-area-inset-bottom, 10px));
        right: 6px;
        gap: 4px;
        opacity: 0.85;
        flex-direction: column;
    }
    
    .fixed-action-buttons:hover {
        opacity: 1;
    }
    
    .fixed-action-btn {
        width: 34px;
        height: 34px;
        opacity: 0.9;
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    }
    
    .fixed-action-btn:hover {
        opacity: 1;
    }
    
    .fixed-action-btn .material-symbols-outlined {
        font-size: 16px;
    }
    
    /* コメント数表示を縮小 */
    .comment-btn-count {
        font-size: 9px;
    }
    
    /* ボタンラッパーの間隔を詰める */
    .fixed-action-btn-wrapper {
        gap: 1px;
    }
    
    /* フラグボタン アイコンサイズの最適化 */
    #fixed-flag-btn svg {
        width: 14px;
        height: 14px;
    }
    
    /* ページトップ/ボトムボタンを完全非表示 */
    .page-top-btn,
    .page-bottom-btn {
        display: none !important;
    }

    /* コメントセクション - フルスクリーン表示 */
    .comment-section {
        width: 100vw;
    }
    
    .comment-section.visible {
        width: 100vw;
    }
    
    @media (prefers-color-scheme: dark) {
        .message-wrapper.user-message .message-content {
            background: rgba(58, 55, 88, 0.95) !important;
        }
    }
}

/* === タブレット用メディアクエリ (768px〜1024px) === */
@media (min-width: 769px) and (max-width: 1024px) {
    /* ページトップ/ボトムボタンを非表示 */
    .page-top-btn,
    .page-bottom-btn {
        display: none !important;
    }
    
    /* ヘッダーボタンのSVGアイコンを中央揃え */
    .header-left a {
        display: inline-flex !important;
        align-items: center !important;
        justify-content: center !important;
    }
    
    .header-left a svg {
        margin: 0 auto !important;
        display: block !important;
    }
}
/* === Capsule Loading Animation === */

/* -- カプセル外枠 (conic-gradient スピナーボーダー) -- */
.generating-capsule {
    position: relative;
    border-radius: 9999px;
    padding: 2px; /* ボーダーの太さ */
    display: inline-flex;
    min-height: 44px;
    overflow: hidden;
}

/* 回転するグラデーションボーダー */
.generating-capsule::before {
    content: '';
    position: absolute;
    inset: -50%;
    background: conic-gradient(
        from 0deg,
        transparent 0%,
        var(--primary-color, #6366f1) 15%,
        transparent 30%,
        rgba(99, 102, 241, 0.3) 50%,
        transparent 65%,
        var(--primary-color, #6366f1) 80%,
        transparent 100%
    );
    animation: capsuleSpin 2.4s linear infinite;
    z-index: 0;
}

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

/* -- カプセル内側 (背景でくり抜き) -- */
.capsule-inner {
    position: relative;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 20px 8px 14px;
    border-radius: 9999px;
    background: var(--bg-primary, #fff);
    z-index: 1;
}

@media (prefers-color-scheme: dark) {
    .capsule-inner {
        background: var(--bg-primary, #1a1a2e);
    }
}

/* -- 絵文字ローテーター -- */
.emoji-rotator {
    position: relative;
    width: 1.5em;
    height: 1.5em;
    font-size: 1.25rem;
    overflow: hidden;
    flex-shrink: 0;
}

.emoji-rotator .emoji {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: inherit;
    line-height: 1;
    will-change: transform, opacity;
}

/* 入場アニメーション: 右 → 中央 */
.emoji-rotator .emoji-enter {
    animation: emojiEnter 0.35s ease-out forwards;
}

@keyframes emojiEnter {
    from { transform: translateX(80%) scale(0.3); opacity: 0; }
    to   { transform: translateX(0) scale(1); opacity: 1; }
}

/* 退場アニメーション: 中央 → 左 */
.emoji-rotator .emoji-exit {
    animation: emojiExit 0.35s ease-in forwards;
}

@keyframes emojiExit {
    from { transform: translateX(0) scale(1); opacity: 1; }
    to   { transform: translateX(-80%) scale(0.3); opacity: 0; }
}

/* -- テキスト -- */
.ai-loading-text {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary, #64748b);
    white-space: nowrap;
    user-select: none;
}

/* -- prefers-reduced-motion: ローディングフィードバックは維持 -- */
@media (prefers-reduced-motion: reduce) {
    /* ボーダー回転はゆっくりに（処理中フィードバック維持） */
    .generating-capsule::before {
        animation-duration: 6s;
    }
    /* 絵文字の入退場は即座切替（派手な動きを抑制） */
    .emoji-rotator .emoji-enter,
    .emoji-rotator .emoji-exit {
        animation-duration: 0.01s;
    }
}

/* === AI Answer Fade-In === */
.ai-answer-fadein {
    animation: answerFadeIn 0.5s ease both;
}

@keyframes answerFadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* === Header Title Spinner === */
@keyframes spin {
    100% { transform: rotate(360deg); }
}

.chat-title-spinner {
    display: inline-block;
    width: 14px;
    height: 14px;
    margin-right: 6px;
    border: 2px solid var(--text-secondary, #999);
    border-top-color: var(--primary-color, #007bff);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    vertical-align: middle;
}

@media (prefers-reduced-motion: reduce) {
    .ai-answer-fadein {
        animation: none;
        opacity: 1;
    }
    /* ヘッダースピナーはゆっくり回転（処理中フィードバック維持） */
    .chat-title-spinner {
        animation-duration: 2s;
    }
}

/* === Copy Button Fixes === */
.copy-btn.copied svg {
    animation: checkPopup 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes checkPopup {
    0% { transform: scale(0.5); opacity: 0; }
    25% { transform: scale(0.75); opacity: 1; }
    50% { transform: scale(1.2); }
    75% { transform: scale(0.9); opacity: 1; }
    100% { transform: scale(1); opacity: 1; }
}

/* === Fixed Loading Indicator (No Background) === */
.fixed-loading-indicator {
    position: fixed;
    left: 50%;
    transform: translateX(-50%);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    background: transparent;
    border: none;
    box-shadow: none;
    z-index: var(--z-appbar);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

/* Success State - Same background as loading state, no green styling */
.fixed-loading-indicator.success {
    /* 背景はローディング状態と同じ */
    animation: none; /* フロートアニメーションを停止 */
}

/* Enhanced Checkmark Icon */
.fixed-loading-indicator.success .checkmark-icon {
    position: relative;
    color: #10b981;
    width: var(--touch-target-min);
    height: var(--touch-target-min);
    animation: checkmarkDraw 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Enhanced Checkmark Drawing Animation */
@keyframes checkmarkDraw {
    0% {
        transform: scale(0);
        opacity: 0;
    }
    30% {
        transform: scale(1.3);
    }
    50% {
        transform: scale(0.9);
    }
    70% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

@media (prefers-color-scheme: dark) {
    .fixed-loading-indicator.success .checkmark-icon {
        color: #34d399;
    }
}

.fixed-loading-indicator.visible {
    opacity: 1;
    pointer-events: auto;
}

.fixed-loading-indicator.top {
    top: 80px;
}

.fixed-loading-indicator.bottom {
    bottom: 120px;
}

/* Simple 2D Floating Animation */
@keyframes simpleFloat {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(-6px);
    }
}


/* ======================================== 
   KaTeX 数式スタイル (ChatGPT/Claude/Gemini風)
   ======================================== */

/* サーバーサイドで追加されるブロック数式ラッパー - 確実な中央揃え */
.message-content .math-block-container {
    display: block !important;
    width: 100% !important;
    text-align: center !important;
    padding: 0.2em 0;
}

.message-content .math-block-container .katex-display,
.message-content .math-block-container .katex {
    display: inline-block;
    text-align: center;
}

/* ブロック数式（$$...$$または\[...\]） */

.message-content .katex-display {
    display: block !important;
    width: 100%;
    margin: 0.2em 0;
    padding: 0.2em 0;  /* コンパクトなパディング */
    overflow-x: hidden;
    overflow-y: hidden;
    text-align: center !important;
}

.message-content .katex-display > .katex {
    display: inline-block;
    text-align: center;
    font-size: 1.1em;  /* ブロック数式のフォントサイズ */
}

/* インライン数式（$...$または\(...\)） */
.message-content .katex {
    font-size: 1.3em;
    line-height: 1.7;  /* 行の高さを増加して上下の余白を確保 */
    padding: 0 0.2em;
    vertical-align: middle;
}

/* 数式内のフォント調整 */
.message-content .katex .mathnormal,
.message-content .katex .mathit {
    font-style: italic;
}

/* 数式のオーバーフロー対策 */
.message-content .katex-html {
    overflow-x: hidden;
    overflow-y: hidden;
    padding: 0.3em 0;  /* 内部パディングを追加 */
}

/* 大きな数式（積分、総和など）のスタイル */
.message-content .katex .op-symbol {
    font-size: 1.2em;
}

/* 積分・総和の上下限（msupsub）の余白 */
.message-content .katex .msupsub {
    vertical-align: baseline;
}

/* 積分記号の上下の余白を確保 */
.message-content .katex .mop {
    margin: 0.2em 0;
}

/* 分数のスタイル調整 */
.message-content .katex .frac-line {
    border-bottom-width: 0.08em;
}

/* 行列・行列式のスタイル */
.message-content .katex .mord.mtable {
    margin: 0.3em 0;
}

/* 括弧のサイズ調整 */
.message-content .katex .delimsizing {
    min-width: 0.15em;
}

/* エラー時のスタイル（赤色で表示） */
.message-content .katex-error {
    color: #cc0000;
    font-family: 'Noto Sans JP', monospace;
    font-size: 0.9em;
}

/* 数式の囲み（boxedなど） */
.message-content .katex .boxed {
    border: 1px solid var(--text-primary);
    padding: 0.3em 0.5em;
    border-radius: 4px;
}

/* ダークモード対応 */
@media (prefers-color-scheme: dark) {
    .message-content .katex {
        color: #e0e0e0;
    }
    
    .message-content .katex-display {
        background: transparent;
    }
    
    .message-content .katex .boxed {
        border-color: #a0a0a0;
    }
    
    .message-content .katex-error {
        color: #ff6b6b;
    }
    
    /* ダークモードでのフラクション線 */
    .message-content .katex .frac-line {
        background: #e0e0e0;
    }
}

/* モバイル対応 - 数式が画面幅を超える場合の横スクロール */
@media (max-width: 768px) {
    .message-content .katex-display {
        margin: 0.8em -16px;
        padding: 0.5em 16px;
        overflow-x: auto;
    }
    
    .message-content .katex {
        font-size: 1em;
    }
}

/* ユーザーメッセージ内の数式スタイル */
.message-wrapper.user-message .message-content .katex {
    color: var(--text-primary);
}

@media (prefers-color-scheme: dark) {
    .message-wrapper.user-message .message-content .katex {
        color: #e0e0e0;
    }
}