/**
 * Chat Interface Styles
 * 基於 Chat_Interface_Design.md 的樣式實現
 */

/* ===== 修正後的輸入框樣式 ===== */

/* 1. 修正主聊天頁面佈局 */
.chat-page {
    display: flex;
    height: 100%;
    background: var(--background);
    position: relative;
    overflow: hidden;
    /* 移除負邊距，改用更穩定的佈局方式 */
    margin: 0;
    padding: 0;
}

/* ===== 對話側邊欄 ===== */
.chat-sidebar {
    width: 280px;
    background: var(--surface);
    border-right: 1px solid var(--neutral-200); /* 淺灰色分隔線 */
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: auto;
    transition: transform var(--duration-slow) var(--ease-out);
}

.sidebar-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    background: var(--surface);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 600;
    font-size: var(--text-lg);
}

.sidebar-brand i {
    width: 24px;
    height: 24px;
    color: var(--primary);
}

.sidebar-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: visible;
}

/* 知識庫選擇器 - 優化後的設計 */
.dataset-section {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    /* background: var(--bg-secondary, #F8FAFC); */ /* 暫時移除背景色 (2025-11-27) */
    position: relative;
    overflow: visible;
}

.dataset-selector-modern {
    position: relative;
    margin-bottom: 1rem;
    z-index: var(--z-modal);
}

.dataset-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.dataset-label i {
    width: 16px;
    height: 16px;
    color: var(--primary);
}

/* 聊天頁面的當前知識庫顯示按鈕 */
.chat-sidebar .current-dataset-display {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0.75rem;
    background: rgba(255, 107, 53, 0.1);
    border: 1px solid var(--primary);
    border-radius: var(--input-radius);
    color: var(--primary);
    font-weight: 500;
    font-size: var(--text-sm);
    cursor: pointer;
    transition: var(--hover-transition);
    white-space: nowrap;
    text-align: left;
}

.chat-sidebar .current-dataset-display:hover {
    background: var(--primary);
    color: white;
    transform: var(--hover-lift);
    box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
}

.chat-sidebar .current-dataset-display.no-selection {
    background: rgba(156, 163, 175, 0.1);
    border-color: var(--text-secondary);
    color: var(--text-secondary);
}

.chat-sidebar .current-dataset-display.no-selection:hover {
    background: var(--text-secondary);
    color: white;
}

.chat-sidebar .current-dataset-display i {
    width: 16px;
    height: 16px;
    transition: transform var(--duration-normal) var(--ease-out);
}

.chat-sidebar .current-dataset-display:hover i {
    transform: rotate(180deg);
}

/* 知識庫下拉選項 */
.dataset-dropdown {
    position: fixed;
    background: var(--bg-primary);
    border: 1px solid var(--border, var(--neutral-200));
    border-radius: var(--input-radius);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-tooltip);
    margin-top: 0.5rem;
    opacity: 0;
    visibility: hidden;
    transition: var(--hover-transition);
    min-width: 250px;
    max-width: 280px;
}

.dataset-dropdown[style*="display: block"] {
    opacity: 1;
    visibility: visible;
}

.dropdown-header {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border);
    font-weight: 600;
    font-size: var(--text-sm);
    color: var(--text-primary);
    background: var(--bg-secondary);
}

.dataset-options {
    max-height: 200px;
    overflow-y: auto;
}

.dataset-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    cursor: pointer;
    transition: var(--hover-transition);
    border-bottom: 1px solid var(--border);
}

.dataset-option:last-child {
    border-bottom: none;
}

.dataset-option:hover {
    background: var(--bg-secondary);
}

.dataset-option.selected {
    background: var(--primary-50);
    color: var(--primary);
}

.dataset-option i {
    width: 16px;
    height: 16px;
    color: var(--text-secondary);
}

.dataset-option.selected i {
    color: var(--primary);
}

.dataset-name {
    flex: 1;
    font-size: var(--text-sm);
    font-weight: 500;
}

/* 知識庫下拉選項中的勾選圖標 */
.dataset-dropdown .check-icon {
    width: 16px !important;
    height: 16px !important;
    color: var(--primary) !important;
}

/* 原有的選擇器（隱藏但保留功能） */
.dataset-select.hidden {
    display: none;
}

/* 新對話按鈕（全寬度，狀態清晰） */
.btn-block {
    width: 100%;
    justify-content: center;
}

#newChatBtn span {
    transition: opacity var(--duration-normal) var(--ease-out);
}

#newChatBtn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--text-secondary);
    border-color: var(--text-secondary);
}

#newChatBtn:disabled:hover {
    background: var(--text-secondary);
    transform: none;
}

/* 提示信息 */
.no-dataset-hint {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 2rem 1rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: var(--text-sm);
}

.no-dataset-hint i {
    width: 32px;
    height: 32px;
    color: var(--text-secondary);
}

/* 對話列表區域 */
/* 使用更高優先級的選擇器覆蓋 api-analytics.css 中的全域樣式 */
.chat-sidebar .conversations-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    /* 確保對話列表能正確處理垂直滾動 */
    min-height: 0; /* 允許 flex 子元素收縮 */
    /* 移除 height: 0，避免產生視覺上的長方形框 */
    max-height: 100%; /* 確保不超出父容器 */
    /* 確保沒有任何邊框或外框效果 - 使用 !important 覆蓋全域樣式 */
    border: none !important;
    outline: none !important;
    box-shadow: none !important;
    background: transparent !important; /* 移除 api-analytics.css 的白色背景 */
    border-radius: 0 !important; /* 移除圓角 */
    padding: 0 !important; /* 移除額外內邊距 */
    margin-bottom: 0 !important; /* 移除底部邊距 */
}

/* 命名空間隔離：Chat 頁面專用 */
.chat-page .section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1rem 0.5rem;
}

.chat-page .section-header h3 {
    margin: 0;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.conversation-count {
    background: var(--primary-alpha-10);
    color: var(--primary);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-xl);
    font-size: var(--text-xs);
    font-weight: 500;
}

.conversations-list {
    flex: 1;
    overflow-y: auto;
    padding: 0 0.5rem;
    position: relative;
    z-index: 1;
    /* 強制設定高度限制以確保滾動生效 */
    max-height: 500px; /* 限制最大高度，強制產生滾動 */
    min-height: 200px; /* 最小高度 */
    scroll-behavior: smooth;
}

.conversation-item {
    display: flex;
    align-items: center;
    padding: 0.75rem;
    margin: 0.25rem 0;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--hover-transition);
    position: relative;
    group: hover;
}

.conversation-item:hover {
    background: var(--primary-alpha-5);
}

.conversation-item.active {
    background: var(--primary-alpha-10);
    border-left: 3px solid var(--primary);
}

.conversation-content {
    flex: 1;
    min-width: 0;
    margin-right: 0.5rem;
}

.conversation-title {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 0.25rem;
}

.conversation-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--text-xs);
    color: var(--text-secondary);
}

.conversation-time {
    color: var(--text-muted);
}

.conversation-dataset {
    color: var(--primary);
    font-weight: 500;
}

.conversation-actions {
    display: flex;
    gap: 0.25rem;
    opacity: 0;
    transition: opacity var(--duration-normal) var(--ease-out);
}

.conversation-item:hover .conversation-actions {
    opacity: 1;
}

.action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--hover-transition);
}

.action-btn:hover {
    background: var(--error-alpha-10);
    color: var(--error);
}

.action-btn i {
    width: 14px;
    height: 14px;
}

/* 空狀態 */
.empty-conversations {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    text-align: center;
    color: var(--text-secondary);
}

.empty-conversations p:first-child {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0.25rem 0;
    font-size: var(--text-sm);
}

.empty-conversations p:first-child i,
.empty-conversations p:first-child svg {
    width: 18px;
    height: 18px;
    color: var(--text-secondary);
}

.empty-conversations p {
    margin: 0.25rem 0;
    font-size: var(--text-sm);
}

.empty-hint {
    color: var(--text-muted);
    font-size: var(--text-xs) !important;
}

/* 載入狀態 */
.loading-conversations {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    color: var(--text-secondary);
}

.loading-spinner {
    margin-bottom: 1rem;
}

.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border);
    border-top: 3px solid var(--primary);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
}

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

/* 小型載入動畫 */
.spinner-small {
    width: 16px;
    height: 16px;
    border: 2px solid var(--border);
    border-top: 2px solid var(--primary);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
}

.avatar-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
}

/* 訊息載入狀態 */
.message-loading .message-text {
    opacity: 0.8;
}

.loading-text {
    color: var(--text-secondary);
    font-style: italic;
}

/* 打字指示器 */
.typing-indicator {
    display: inline-flex;
    gap: 2px;
    margin-right: 8px;
}

.typing-indicator span {
    width: 4px;
    height: 4px;
    background: var(--text-secondary);
    border-radius: var(--radius-full);
    animation: typing 1.4s infinite;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.3;
    }
    30% {
        transform: translateY(-10px);
        opacity: 1;
    }
}

/* 錯誤訊息樣式 */
.message-error {
    background: var(--error-bg, rgba(239, 68, 68, 0.1));
    border: 1px solid var(--error-border, rgba(239, 68, 68, 0.2));
    border-radius: var(--radius-lg);
    margin: 8px 16px;
    animation: errorFadeIn 0.3s ease-in;
}

.message-error .message-avatar i {
    color: var(--error, #ef4444);
}

.error-text {
    color: var(--error, #ef4444);
    font-weight: 500;
}

@keyframes errorFadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 2. 確保主內容區域有正確的容器約束 */
.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--background);
    position: relative;
    /* 添加內邊距以確保輸入框有足夠空間 */
    padding-bottom: 100px; /* 為輸入框預留空間 */
}

/* 行動版 sidebar header（桌面版隱藏） */
.sidebar-mobile-header {
    display: none;
}

/* 行動裝置頂部標頭 */
.chat-mobile-header {
    display: none;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

.mobile-header-left {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.chat-sidebar-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    color: var(--text-primary);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: background-color var(--duration-normal) var(--ease-out);
}

.chat-sidebar-toggle:hover {
    background: var(--primary-alpha-10);
}

.chat-title {
    margin: 0;
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--text-primary);
}

.mobile-header-actions {
    display: flex;
    gap: 0.5rem;
}

/* 3. 修正訊息區域 */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    background: var(--background);
    scroll-behavior: smooth;
    /* 確保訊息不會被輸入框遮擋 */
    margin-bottom: 0;
}

/* 立即滾動模式（用於載入歷史對話時） */
.chat-messages.instant-scroll {
    scroll-behavior: auto !important;
}

/* 空訊息狀態 */
.empty-messages {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    padding: 2rem;
    text-align: center;
    color: var(--text-secondary);
}

.empty-chat-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--primary-alpha-10, rgba(255, 107, 53, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.empty-chat-icon i,
.empty-chat-icon svg {
    width: 32px;
    height: 32px;
    color: var(--primary);
}

.empty-messages h3 {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem;
}

.empty-messages .empty-hint {
    margin: 0 0 1rem;
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.empty-actions {
    display: none;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 0.5rem;
    width: 100%;
    max-width: 240px;
}

@media (max-width: 768px) {
    .empty-actions {
        display: flex;
    }
}

.empty-actions .btn {
    width: 100%;
    justify-content: center;
}

.empty-messages p {
    margin: 0.25rem 0;
    font-size: var(--text-sm);
}

/* 訊息容器 */
.messages-container {
    padding: 1rem;
    padding-bottom: 0; /* 底部不需要額外padding，由輸入框自然分隔 */
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-height: 100%;
}

/* Scroll Spacer - 防止被 flex 容器壓縮 (站內 + 訪客通用) */
.messages-container > .scroll-spacer {
    flex-shrink: 0 !important;
    flex-grow: 0;
    min-height: 0;
    box-sizing: border-box;
}

/* 訊息對容器 - 包含一問一答 */
.message-pair {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

/* 新消息動畫類別 */
.message-pair.new-message {
    animation: slideInNewMessage 0.4s ease-out;
}

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

/* 個別訊息 */
.message {
    display: flex;
    gap: 0.75rem;
    max-width: 100%;
}

/* AI 訊息 - 左側對齊 (預設) */
.message-assistant {
    justify-content: flex-start;
}

/* 用戶訊息 - 改為左側對齊，與AI助手相同布局 */
.message-user {
    flex-direction: row; /* 改為正常順序：頭像在左，內容在右 */
    justify-content: flex-start; /* 左側對齊 */
    width: 100%;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.message-user .message-avatar {
    background: var(--primary);
    color: white;
}

.message-assistant .message-avatar {
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text-secondary);
}

.message-avatar i {
    width: 20px;
    height: 20px;
}

.message-content {
    flex: 1;
    min-width: 0;
    max-width: 70%;
}

/* 用戶消息內容區域 - 自適應寬度 */
.message-user .message-content {
    flex: 0 0 auto; /* 不伸展不壓縮，依內容決定寬度 */
    width: fit-content;
    max-width: 70%; /* 與AI助手一樣的最大寬度 */
}

.message-user .message-content {
    text-align: left; /* 改為左對齊，與AI助手一致 */
}

.message-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.message-user .message-header {
    justify-content: flex-start; /* 改為左對齊，與AI助手一致 */
}

.message-role {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.message-time {
    font-size: var(--text-xs);
    color: var(--text-muted);
}

.message-text {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--card-radius);
    padding: 0.75rem 1rem;
    font-size: var(--text-sm);
    line-height: 1.5;
    color: var(--text-primary);
    word-wrap: break-word;
    word-break: break-word;
}

/* 站內對話：AI 訊息內容自適應寬度 */
.chat-page .message-assistant .message-content {
    flex: 0 0 auto;
    width: fit-content;
    max-width: 70%;
}

/* 站內對話：AI 訊息泡泡 */
.chat-page .message-assistant .message-text {
    background: rgba(0, 0, 0, 0.04);
    border: none;
    border-radius: 18px 18px 18px 4px;
}

/* 站內對話：用戶訊息泡泡 */
.chat-page .message-user .message-text {
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 18px 18px 4px 18px;
}

/* 用戶泡泡內所有 Markdown 子元素繼承白色 */
.chat-page .message-user .message-text,
.chat-page .message-user .message-text p,
.chat-page .message-user .message-text h1,
.chat-page .message-user .message-text h2,
.chat-page .message-user .message-text h3,
.chat-page .message-user .message-text h4,
.chat-page .message-user .message-text h5,
.chat-page .message-user .message-text h6,
.chat-page .message-user .message-text strong,
.chat-page .message-user .message-text em,
.chat-page .message-user .message-text li,
.chat-page .message-user .message-text a,
.chat-page .message-user .message-text blockquote,
.chat-page .message-user .message-text code {
    color: white;
}

/* 站內對話：隱藏角色名稱和時間，簡化泡泡視覺 */
.chat-page .message-header {
    display: none;
}

/* ===== 訊息來源引用 ===== */
.message-sources {
    margin-top: var(--space-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--surface);
}

/* Header：可點擊整區收合 */
.sources-header {
    width: 100%;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    border: none;
    border-bottom: 1px solid var(--border-color);
    font-family: inherit;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    text-align: left;
    transition: background-color var(--duration-normal) var(--ease-out);
}

.sources-header:hover {
    background: var(--primary-alpha-5);
}

.sources-header > i:first-child {
    width: 16px;
    height: 16px;
    color: var(--primary);
    flex-shrink: 0;
}

.sources-title {
    flex-shrink: 0;
}

.sources-count {
    color: var(--text-tertiary);
    font-weight: 400;
    margin-left: -2px;
}

.sources-toggle-icon {
    margin-left: auto;
    width: 16px;
    height: 16px;
    color: var(--text-tertiary);
    transition: transform var(--duration-normal) var(--ease-out);
}

.message-sources[data-collapsed="true"] .sources-toggle-icon {
    transform: rotate(180deg);
}

.message-sources[data-collapsed="true"] .sources-header {
    border-bottom-color: transparent;
}

.message-sources[data-collapsed="true"] .sources-list {
    display: none;
}

.sources-list {
    display: flex;
    flex-direction: column;
}

.source-item {
    display: flex;
    gap: var(--space-sm);
    padding: var(--space-md);
    border-bottom: 1px solid var(--border-color);
}

.source-item:last-child {
    border-bottom: none;
}

.source-icon {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.source-icon svg {
    width: 22px;
    height: 22px;
}

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

.source-title {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
    line-height: 1.4;
}

.source-name {
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.source-relevance {
    font-size: var(--text-xs);
    font-weight: 400;
    color: var(--text-tertiary);
}

.source-relevance::before {
    content: '·';
    margin-right: 4px;
    color: var(--text-tertiary);
}

/* 展開完整段落按鈕 */
.source-expand-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-top: var(--space-xs);
    padding: 4px 8px;
    border: none;
    background: transparent;
    color: var(--primary);
    font-family: inherit;
    font-size: var(--text-xs);
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--radius-sm, 4px);
    transition: background-color var(--duration-normal) var(--ease-out);
}

.source-expand-btn:hover {
    background: var(--primary-alpha-5);
}

.source-expand-btn i {
    width: 14px;
    height: 14px;
    transition: transform var(--duration-normal) var(--ease-out);
}

.source-expand-btn.is-expanded i {
    transform: rotate(180deg);
}

.source-full {
    margin-top: var(--space-sm);
    padding: var(--space-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm, 4px);
    max-height: 360px;
    overflow-y: auto;
}

/* 多段落分隔 */
.source-chunk {
    padding: var(--space-sm) var(--space-sm);
    border-bottom: 1px dashed var(--border-color);
}

.source-chunk:last-child {
    border-bottom: none;
}

.source-chunk-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-xs);
    font-size: 11px;
    color: var(--text-tertiary);
    font-weight: 500;
    letter-spacing: 0.02em;
}

.source-chunk-index::before {
    content: '◆';
    margin-right: 4px;
    color: var(--primary-alpha-20);
    font-size: 8px;
    vertical-align: middle;
}

.source-chunk-score {
    color: var(--primary);
    font-weight: 500;
}

.source-chunk-body {
    font-size: var(--text-xs);
    line-height: 1.65;
    color: var(--text-secondary);
    white-space: pre-wrap;
    word-break: break-word;
}

.source-segments {
    font-size: var(--text-xs);
    font-weight: 400;
    color: var(--text-tertiary);
}

.source-segments::before {
    content: '·';
    margin-right: 4px;
    color: var(--text-tertiary);
}

/* 來源置頂徽章 */
.source-pinned-badge {
    display: inline-flex;
    align-items: center;
    font-size: 10px;
    font-weight: var(--font-medium, 500);
    color: var(--primary);
    background-color: var(--primary-50);
    padding: 1px 5px;
    border-radius: var(--radius-full, 9999px);
}

/* 來源項置頂標記 */
.source-item.is-pinned {
    border-left: 2px solid var(--primary);
    padding-left: calc(var(--space-md) - 2px);
}

@media (prefers-reduced-motion: reduce) {
    .sources-toggle-icon,
    .source-expand-btn i {
        transition: none;
    }
}

/* 小螢幕簡化 */
@media (max-width: 480px) {
    .source-full {
        max-height: 240px;
    }
}

/* 貼圖（舊版 inline 嵌入，保留向後兼容） */
.message-sticker {
    margin-top: 0.75rem;
    display: inline-block;
}

.message-sticker .sticker-image {
    max-width: 120px;
    max-height: 120px;
    border-radius: var(--radius-lg);
    object-fit: contain;
    display: block;
}

/* ===== 獨立貼圖氣泡（雙通道模式） ===== */
.sticker-message {
    animation: stickerFadeIn 0.3s ease-out;
}

.sticker-bubble {
    display: inline-block;
    padding: 4px;
}

.sticker-img {
    display: block;
    max-width: 120px;
    max-height: 120px;
    border-radius: var(--radius-lg, 8px);
    object-fit: contain;
    animation: stickerBounceIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes stickerBounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.08);
    }
    70% {
        transform: scale(0.95);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes stickerFadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 480px) {
    .sticker-img {
        max-width: 96px;
        max-height: 96px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .sticker-message {
        animation: none;
    }

    .sticker-img {
        animation: none;
    }
}

/* 4. 重新設計輸入框容器 - 使用更可靠的定位方式 (2025-11-27 修正) */
.chat-input-container {
    position: absolute; /* 相對於 .chat-main (position: relative) */
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    max-width: calc(100% - 32px); /* 相對於 chat-main 寬度，留出左右邊距 */
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 16px;
    z-index: var(--z-fixed);
    box-sizing: border-box;
    margin-bottom: env(safe-area-inset-bottom, 0);
    transition: width var(--duration-slow) var(--ease-out);
}

/* 側邊欄收合時的輸入框調整 - 寬度可以更大 */
.sidebar.collapsed ~ .main-content .chat-input-container {
    width: 700px;
    max-width: calc(100% - 32px);
}

/* 輸入禁用提示已移除，改用 placeholder 提示 */

/* 9. 輸入框內部元素調整 */
.input-controls {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

/* 輸入框左側資訊區域 */
.input-left-info {
    align-self: flex-start; /* 與輸入框頂部對齊 */
    margin-bottom: 0.5rem;
}

.input-controls.disabled {
    opacity: 0.6;
    pointer-events: none;
}

.input-wrapper {
    flex: 1;
    position: relative;
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--card-radius);
    padding: 0.75rem;
    transition: border-color var(--duration-normal) var(--ease-out);
    min-width: 0; /* 確保 flexbox 收縮正常工作 */
}

.input-wrapper:focus-within {
    border-color: var(--primary);
    box-shadow: var(--input-focus-ring);
}

/* 10. 訊息輸入框 */
.message-input {
    width: 100%;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: var(--text-sm);
    line-height: 1.5;
    resize: none;
    outline: none;
    min-height: 24px;
    max-height: 120px;
    font-family: inherit;
    /* 確保不會水平溢出 */
    box-sizing: border-box;
}

.message-input::placeholder {
    color: var(--text-muted);
}

.input-actions {
    position: absolute;
    right: 0.75rem;
    bottom: 0.75rem;
    display: flex;
    gap: 0.25rem;
}

/* 11. 發送按鈕調整 */
.send-btn {
    min-width: 80px;
    height: 40px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--text-sm);
    font-weight: 500;
    flex-shrink: 0; /* 防止按鈕被壓縮 */
}

.send-btn i {
    width: 16px;
    height: 16px;
}

/* 12. 輸入提示信息調整 */
.input-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    margin-top: 0.75rem;
    min-height: 0;
    /* 確保在小屏幕上正確換行 */
    flex-wrap: wrap;
    gap: 0.5rem;
}

.input-hints {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    font-size: var(--text-xs);
    color: var(--text-muted);
}

.hint-item {
    display: block;
    white-space: nowrap;
}

.conversation-hint {
    color: var(--text-secondary);
    font-weight: 500;
}

.conversation-info {
    font-size: var(--text-xs);
    color: var(--text-secondary);
    font-family: var(--font-mono, monospace);
}

/* ===== 行動裝置遮罩 ===== */
.mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal-backdrop);
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-slow) var(--ease-out);
}

.mobile-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ===== 響應式設計 ===== */

/* 5. 平板設計優化 (2025-11-27 簡化) */
@media (max-width: 1024px) and (min-width: 769px) {
    .chat-input-container {
        width: 500px;
        max-width: calc(100% - 24px);
    }

    /* 平板裝置上的側邊欄收合狀態 */
    .sidebar.collapsed ~ .main-content .chat-input-container {
        width: 600px;
        max-width: calc(100% - 24px);
    }
}

/* 7. 手機設計完全重新設計 */
@media (max-width: 768px) {
    /* 隱藏全站 navbar — chat-mobile-header 接管 */
    body:has(.chat-page) .top-navbar {
        display: none;
    }

    body:has(.chat-page) .main-content,
    .app-layout.app-page:has(.chat-page) .main-content {
        margin-top: 0;
        height: 100vh;
        height: 100dvh;
        padding: 0;
    }

    .chat-page {
        flex-direction: column;
        height: 100%;
    }

    .chat-main {
        width: 100%;
        padding-bottom: 80px;
    }

    /* 輸入框底部齊平（原生訊息 App 風格）*/
    .chat-input-container {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        transform: none;
        width: 100%;
        max-width: 100%;
        padding: 12px;
        padding-bottom: max(12px, env(safe-area-inset-bottom));
        border-radius: 0;
        border-top: 1px solid var(--border);
        background: var(--surface);
        margin: 0;
    }

    .chat-messages {
        padding: 0.75rem;
    }

    /* 全螢幕 sidebar overlay */
    .chat-sidebar {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        height: 100dvh;
        z-index: var(--z-modal); /* 1050 — 高於 overlay 的 1040 */
        transform: translateX(-100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        background: var(--surface);
        display: flex;
        flex-direction: column;
    }

    .chat-sidebar.mobile-open {
        transform: translateX(0);
    }

    /* 行動版 sidebar header（關閉按鈕）*/
    .sidebar-mobile-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0.75rem 1rem;
        padding-top: max(0.75rem, env(safe-area-inset-top));
        border-bottom: 1px solid var(--border);
        background: var(--surface);
        flex-shrink: 0;
    }

    .sidebar-mobile-title {
        margin: 0;
        font-size: var(--text-lg);
        font-weight: 600;
        color: var(--text-primary);
    }

    /* 行動版隱藏桌面版返回按鈕 */
    .chat-back-button {
        display: none;
    }

    /* 行動版 header */
    .chat-mobile-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0.75rem 1rem;
        padding-top: max(0.75rem, env(safe-area-inset-top));
        background: var(--surface);
        border-bottom: 1px solid var(--border);
        position: sticky;
        top: 0;
        z-index: 10;
        flex-shrink: 0;
    }

    .mobile-header-left {
        display: flex;
        align-items: center;
        gap: 0.25rem;
    }

    .message-content {
        max-width: 85%;
    }

    .input-left-info {
        margin-bottom: 0.25rem;
    }

    .input-hints {
        gap: 0.125rem;
        font-size: 0.7rem;
    }

    /* 對話項目觸控優化 */
    .chat-sidebar .conversation-item {
        padding: 1rem;
        border-radius: var(--radius-md);
        margin: 0 0.5rem;
    }

    .chat-sidebar .conversation-item:active {
        background: var(--primary-alpha-10, rgba(255, 107, 53, 0.1));
        transform: scale(0.98);
    }

    /* 隱藏 GuideCharacter */
    body:has(.chat-page) #guide-character-container {
        display: none !important;
    }
}

/* 8. 極小屏幕特別處理 */
@media (max-width: 480px) {
    .chat-input-container {
        padding: 10px;
        padding-bottom: max(10px, env(safe-area-inset-bottom));
    }

    .chat-main {
        padding-bottom: 72px;
    }

    .message-content {
        max-width: 95%;
    }

    .messages-container {
        padding: 0.75rem;
    }

    .chat-messages {
        padding: 0 0.5rem;
    }

    .input-hints {
        font-size: 0.65rem;
    }
}

/* 13. 極小屏幕下的輸入控制 */
@media (max-width: 480px) {
    .input-controls {
        flex-direction: column;
        gap: 0.5rem;
        align-items: stretch;
    }

    .send-btn {
        align-self: flex-end;
        min-width: 70px;
    }

    .input-footer {
        justify-content: center;
        text-align: center;
        margin-top: 0.5rem;
    }

    .input-left-info {
        order: -1;
        margin-bottom: 0.25rem;
    }
}

/* ===== 滾動條樣式 ===== */
.conversations-list::-webkit-scrollbar,
.chat-messages::-webkit-scrollbar {
    width: 4px;
}

.conversations-list::-webkit-scrollbar-track,
.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.conversations-list::-webkit-scrollbar-thumb,
.chat-messages::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: var(--radius-xs);
}

.conversations-list::-webkit-scrollbar-thumb:hover,
.chat-messages::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ===== 動畫效果 ===== */
/* 移除預設的個別消息動畫，只保留新消息對的動畫 */
.message {
    opacity: 1; /* 確保歷史消息直接顯示 */
}

/* 只對新增的消息對使用動畫 */
@keyframes slideInNewMessage {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== 輔助類別 ===== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.text-truncate {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ===== 高對比模式支援 ===== */
@media (prefers-contrast: high) {
    .chat-sidebar {
        border-right-width: 2px;
    }

    .conversation-item.active {
        border-left-width: 4px;
    }

    .message-text {
        border-width: 2px;
    }

    /* 15. 高對比度模式優化 */
    .chat-input-container {
        border-width: 2px;
    }

    .input-wrapper:focus-within {
        box-shadow: 0 0 0 3px var(--primary);
    }
}

/* ===== 返回按鈕樣式 ===== */
.chat-back-button {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
}

.chat-back-button .btn {
    width: 100%;
    justify-content: flex-start;
    gap: 0.5rem;
    color: var(--text-secondary);
}

.chat-back-button .btn:hover {
    background: var(--bg-secondary);
    color: var(--primary);
}

.chat-back-button .btn i {
    width: 18px;
    height: 18px;
}

/* ===== 桌面版工具列樣式 ===== */
.chat-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1.5rem;
    border-bottom: 1px solid var(--border);
    background: var(--surface);
}

.toolbar-left {
    flex: 1;
}

.chat-dataset-name {
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.toolbar-right {
    display: flex;
    gap: 0.5rem;
}

.toolbar-right .btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
}

.toolbar-right .btn i {
    width: 18px;
    height: 18px;
}

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

/* 行動裝置隱藏工具列 */
@media (max-width: 768px) {
    .chat-toolbar {
        display: none;
    }
}

/* ===== 動畫偏好設定 ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .chat-sidebar {
        transition: none;
    }

    .mobile-overlay {
        transition: none;
    }
}

/* ===== Markdown 樣式 ===== */
/* 已移至共用元件: /static/css/components/markdown.css */
/* ===== 密碼保護改進樣式 ===== */
.label-with-status {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    margin-bottom: 0.5rem;
}

.label-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.status-hint {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.625rem;
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    font-weight: 500;
}

.status-hint.status-enabled {
    background: rgba(34, 197, 94, 0.1);
    color: var(--success-dark);
}

.config-item label .status-hint.status-enabled i,
.config-item .status-hint.status-enabled i,
.status-hint.status-enabled i {
    color: var(--success-dark) !important;  /* 確保勾勾圖標是綠色，覆蓋 knowledge.css 的全域樣式 */
}

.status-hint.status-warning {
    background: rgba(251, 146, 60, 0.1);
    color: var(--primary-dark);
}

.status-hint i {
    width: 14px;
    height: 14px;
}

.password-action-buttons {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.btn-text {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.5rem;
    border: none;
    background: transparent;
    color: var(--primary);
    font-size: 0.8125rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--hover-transition);
}

.btn-text:hover {
    background: rgba(255, 107, 53, 0.1);
}

.btn-text.btn-primary {
    color: var(--primary);
    box-shadow: none !important;  /* 移除 buttons.css 的陰影 */
}

.btn-text.btn-primary:hover {
    box-shadow: none !important;  /* 移除 hover 時的陰影 */
}

.btn-text.btn-success {
    color: var(--success-dark);
}

.btn-text.btn-success:hover {
    background: rgba(34, 197, 94, 0.1);
}

.btn-text.btn-warning {
    color: var(--primary);
}

.btn-text.btn-delete {
    color: var(--primary);  /* 平常也是橘色 */
}

.btn-text.btn-delete:hover {
    color: var(--error-dark);  /* hover 時才變紅色 */
    background: rgba(220, 38, 38, 0.1);
}

.btn-text i {
    width: 12px;
    height: 12px;
}

.password-input-wrapper {
    margin-top: 0.75rem;
}

.password-pending-alert {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.75rem;
    padding: 0.625rem 0.875rem;
    background: rgba(251, 146, 60, 0.1);
    border-left: 3px solid var(--warning);
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    color: var(--primary-dark);
}

.password-pending-alert i {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

/* ===== 站內對話：建議問題 ===== */
.chat-page .suggested-questions {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

.chat-page .suggested-questions-header {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 8px;
    font-size: var(--text-xs);
    color: var(--text-secondary);
    font-weight: 500;
}

.chat-page .suggested-questions-header svg {
    width: 14px;
    height: 14px;
    stroke: var(--primary);
}

.chat-page .suggested-questions-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.chat-page .suggested-question-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: transparent;
    border: 1px solid var(--primary);
    border-radius: var(--radius-2xl);
    font-size: var(--text-sm);
    color: var(--primary);
    cursor: pointer;
    transition: var(--hover-transition);
    max-width: 100%;
}

.chat-page .suggested-question-btn:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.chat-page .suggested-question-btn:active {
    transform: translateY(0);
}

.chat-page .suggested-question-btn svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.chat-page .suggested-question-btn span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

@media (max-width: 480px) {
    .chat-page .suggested-questions-list {
        flex-direction: column;
    }

    .chat-page .suggested-question-btn {
        width: 100%;
        justify-content: flex-start;
    }

    .chat-page .suggested-question-btn span {
        white-space: normal;
        text-align: left;
    }
}