/* 全局变量 */
:root {
    --primary-color: #4a90d9;
    --primary-hover: #357abd;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    
    --bg-color: #f5f7fa;
    --sidebar-bg: #ffffff;
    --content-bg: #ffffff;
    --toolbar-bg: #ffffff;
    --border-color: #e1e4e8;
    --text-color: #24292e;
    --text-secondary: #586069;
    --text-muted: #6a737d;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    
    --sidebar-width: 280px;
    --toolbar-height: 56px;
    --transition: all 0.3s ease;
}

/* 深色主题 */
[data-theme="dark"] {
    --bg-color: #0d1117;
    --sidebar-bg: #161b22;
    --content-bg: #0d1117;
    --toolbar-bg: #161b22;
    --border-color: #30363d;
    --text-color: #c9d1d9;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
}

/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji';
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow: hidden;
}

/* 应用容器 */
.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* 侧边栏 */
.sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    z-index: 100;
}

.sidebar.collapsed {
    margin-left: calc(-1 * var(--sidebar-width));
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h1 {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-actions {
    display: flex;
    gap: 8px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.sidebar-actions .btn-secondary {
    flex: 0 0 auto;
    min-width: 40px;
    padding: 8px 12px;
}

/* 最近文件夹 */
.recent-folders {
    border-bottom: 1px solid var(--border-color);
    background: var(--sidebar-bg);
}

.recent-folders-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    background: var(--bg-color);
}

.recent-folders-header i {
    font-size: 12px;
}

.recent-folders-list {
    max-height: 200px;
    overflow-y: auto;
}

.recent-folder-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    cursor: pointer;
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.recent-folder-item:hover {
    background: var(--bg-color);
}

.recent-folder-item.active {
    background: rgba(74, 144, 217, 0.1);
    border-left-color: var(--primary-color);
}

.recent-folder-item i.fa-folder {
    font-size: 14px;
    color: #f9a825;
    cursor: pointer;
}

.recent-folder-item .folder-name {
    flex: 1;
    font-size: 13px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    cursor: pointer;
}

.recent-folder-item .btn-icon-small {
    padding: 4px 6px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 4px;
    opacity: 0;
    transition: var(--transition);
}

.recent-folder-item:hover .btn-icon-small {
    opacity: 1;
}

.recent-folder-item .btn-icon-small:hover {
    background: var(--danger-color);
    color: white;
}

.search-box {
    position: relative;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
}

.search-box i {
    position: absolute;
    left: 28px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-box input {
    width: 100%;
    padding: 10px 12px 10px 36px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-color);
    color: var(--text-color);
    font-size: 14px;
    transition: var(--transition);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.1);
}

.file-tree {
    flex: 1;
    overflow-y: auto;
    padding: 12px 0;
}

.file-tree .loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 40px;
    color: var(--text-muted);
}

.file-tree .empty {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
}

.file-tree .empty i {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

/* 文件树项目 */
.tree-item {
    cursor: pointer;
    user-select: none;
}

.tree-item-content {
    display: flex;
    align-items: center;
    padding: 8px 16px;
    gap: 10px;
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.tree-item-content:hover {
    background: var(--bg-color);
}

.tree-item-content.active {
    background: rgba(74, 144, 217, 0.1);
    border-left-color: var(--primary-color);
}

.tree-item-content i {
    font-size: 14px;
    width: 16px;
    text-align: center;
}

.tree-item-content .folder-icon {
    color: #f9a825;
}

.tree-item-content .file-icon {
    color: var(--primary-color);
}

.tree-item-content .chevron {
    color: var(--text-muted);
    transition: var(--transition);
}

.tree-item-content .chevron.open {
    transform: rotate(90deg);
}

.tree-item-content span {
    flex: 1;
    font-size: 14px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.tree-children {
    display: none;
    padding-left: 20px;
}

.tree-children.open {
    display: block;
}

/* 高亮脉冲动画 */
@keyframes highlight-pulse {
    0%, 100% {
        background-color: var(--hover-color);
        box-shadow: 0 0 0 0 rgba(74, 144, 217, 0.4);
    }
    50% {
        background-color: rgba(74, 144, 217, 0.3);
        box-shadow: 0 0 0 8px rgba(74, 144, 217, 0);
    }
}

.tree-item.highlight-pulse {
    animation: highlight-pulse 1s ease-in-out 2;
    border-radius: 4px;
}

/* 主内容区 */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* 工具栏 */
.toolbar {
    height: var(--toolbar-height);
    min-height: var(--toolbar-height);
    background: var(--toolbar-bg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    gap: 16px;
}

.toolbar-left,
.toolbar-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* 导航按钮样式 */
.nav-btn {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    transition: all 0.2s;
}

.nav-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.nav-btn:not(:disabled):hover {
    background: var(--primary-color);
    color: white;
}

.current-file {
    font-size: 14px;
    color: var(--text-secondary);
    max-width: 400px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.view-toggle {
    display: flex;
    background: var(--bg-color);
    border-radius: 6px;
    padding: 4px;
    gap: 4px;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-secondary {
    background: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--border-color);
}

.btn-success {
    background: var(--success-color);
    color: white;
}

.btn-success:hover {
    background: #218838;
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.btn-icon:hover {
    background: var(--bg-color);
    color: var(--text-color);
}

.btn-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 4px;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
}

.btn-toggle:hover {
    color: var(--text-color);
}

.btn-toggle.active {
    background: var(--primary-color);
    color: white;
}

/* 编码选择器 */
.encoding-select {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-color);
    color: var(--text-color);
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition);
    outline: none;
}

.encoding-select:hover {
    border-color: var(--primary-color);
}

.encoding-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.1);
}

/* 内容区域 */
.content-area {
    flex: 1;
    display: flex;
    overflow: hidden;
    background: var(--bg-color);
    position: relative;  /* 支持目录面板定位 */
}

/* 欢迎页面 */
.welcome-page {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.welcome-content {
    text-align: center;
    color: var(--text-muted);
}

.welcome-content i {
    font-size: 80px;
    margin-bottom: 24px;
    opacity: 0.3;
}

.welcome-content h2 {
    font-size: 28px;
    margin-bottom: 12px;
    color: var(--text-secondary);
}

.welcome-content p {
    font-size: 16px;
    margin-bottom: 8px;
}

.welcome-content .tip {
    font-size: 14px;
    opacity: 0.7;
}

/* 编辑器容器 */
.editor-container {
    flex: 1;
    display: flex;
    overflow: hidden;
}

#editor {
    width: 100%;
    height: 100%;
    padding: 24px;
    border: none;
    resize: none;
    font-family: 'JetBrains Mono', 'Fira Code', Consolas, Monaco, 'Courier New', monospace, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji';
    font-size: 15px;
    line-height: 1.7;
    background: var(--content-bg);
    color: var(--text-color);
    outline: none;
    scroll-behavior: smooth;
}

#editor::placeholder {
    color: var(--text-muted);
}

/* 预览容器 */
.preview-container {
    flex: 1;
    overflow-y: auto;
    scroll-behavior: smooth;
    background: var(--content-bg);
}

/* 预览区域双击编辑提示（仅在纯预览模式下） */
.content-area:not(.split-mode) .preview-container .markdown-body {
    cursor: text;
}

.content-area:not(.split-mode) .preview-container .markdown-body > *:hover {
    background: var(--hover-bg);
    border-radius: 4px;
    transition: background 0.15s ease;
}

.content-area:not(.split-mode) .preview-container .markdown-body > *:hover::after {
    content: '双击编辑';
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 11px;
    color: var(--text-muted);
    background: var(--content-bg);
    padding: 2px 6px;
    border-radius: 3px;
    border: 1px solid var(--border-color);
    opacity: 0;
    transition: opacity 0.15s ease;
    pointer-events: none;
}

.content-area:not(.split-mode) .preview-container .markdown-body > * {
    position: relative;
}

.content-area:not(.split-mode) .preview-container .markdown-body > *:hover::after {
    opacity: 0.8;
}

/* 排除特殊元素的悬停效果 */
.content-area:not(.split-mode) .preview-container .markdown-body > .mermaid:hover,
.content-area:not(.split-mode) .preview-container .markdown-body > .plantuml:hover,
.content-area:not(.split-mode) .preview-container .markdown-body > pre:hover {
    background: transparent;
}

.content-area:not(.split-mode) .preview-container .markdown-body > .mermaid:hover::after,
.content-area:not(.split-mode) .preview-container .markdown-body > .plantuml:hover::after,
.content-area:not(.split-mode) .preview-container .markdown-body > pre:hover::after {
    display: none;
}

/* 分栏模式 */
.content-area.split-mode {
    position: relative;
}

.content-area.split-mode .editor-container {
    flex: 0 0 50%;
    max-width: 50%;
    border-right: none;
}

.content-area.split-mode .preview-container {
    flex: 0 0 50%;
    max-width: 50%;
    border-right: none;
}

/* 分栏调整器 */
.split-resizer {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 8px;
    left: 50%;
    transform: translateX(-50%);
    cursor: col-resize;
    background: transparent;
    z-index: 10;
    user-select: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.split-resizer::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    background: var(--border-color);
    transition: var(--transition);
}

.split-resizer:hover::before,
.split-resizer.dragging::before {
    background: var(--primary-color);
    width: 3px;
}

/* 同步按钮容器 */
.sync-buttons {
    position: relative;
    z-index: 11;
    display: flex;
    flex-direction: column;
    gap: 6px;
    background: var(--content-bg);
    border: 2px solid var(--primary-color);
    border-radius: 10px;
    padding: 8px 6px;
    box-shadow: 0 4px 12px rgba(74, 144, 217, 0.3);
    opacity: 1;
    transition: all 0.2s;
}

.sync-buttons:hover {
    box-shadow: 0 6px 16px rgba(74, 144, 217, 0.4);
    transform: scale(1.05);
}

.sync-btn {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--primary-color);
    color: white;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    font-size: 14px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}

.sync-btn:hover {
    background: var(--primary-hover);
    transform: scale(1.15);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.sync-btn:active {
    transform: scale(0.95);
}

/* 拖动时的效果 */
.content-area.split-mode.resizing {
    cursor: col-resize;
}

.content-area.split-mode.resizing .editor-container,
.content-area.split-mode.resizing .preview-container {
    pointer-events: none;
    user-select: none;
}

/* 弹窗 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--content-bg);
    border-radius: 12px;
    width: 90%;
    max-width: 480px;
    box-shadow: var(--shadow-lg);
    animation: modalIn 0.2s ease;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.modal-body {
    padding: 24px;
}

.modal-body label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
}

.modal-body input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    background: var(--bg-color);
    color: var(--text-color);
    transition: var(--transition);
}

.modal-body input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.1);
}

.modal-body .hint {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 8px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
}

/* Toast 提示 */
.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column-reverse;
    gap: 10px;
}

.toast {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    background: var(--content-bg);
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    animation: toastIn 0.3s ease;
    min-width: 280px;
}

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

.toast.toast-out {
    animation: toastOut 0.3s ease forwards;
}

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

.toast.success i { color: var(--success-color); }
.toast.error i { color: var(--danger-color); }
.toast.warning i { color: var(--warning-color); }
.toast.info i { color: var(--primary-color); }

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* 响应式 */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        height: 100vh;
        box-shadow: var(--shadow-lg);
    }
    
    .sidebar.collapsed {
        margin-left: calc(-1 * var(--sidebar-width));
    }
    
    .current-file {
        max-width: 200px;
    }
}

/* 文档目录面板 */
.toc-panel {
    position: absolute;
    right: 0;
    top: 0;
    width: 260px;
    height: 100%;
    background: var(--sidebar-bg);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
    z-index: 50;
    box-shadow: -2px 0 8px rgba(0, 0, 0, 0.1);
}

.toc-panel.hidden {
    transform: translateX(100%);
    pointer-events: none;  /* 隐藏时让鼠标事件穿透 */
}

.toc-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
}

.toc-header i {
    color: var(--primary-color);
}

.toc-header span {
    flex: 1;
}

.toc-close {
    padding: 4px 6px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 4px;
    transition: var(--transition);
}

.toc-close:hover {
    background: var(--bg-color);
    color: var(--text-color);
}

.toc-content {
    flex: 1;
    overflow-y: auto;
    padding: 8px 0;
}

.toc-empty {
    padding: 20px;
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
}

/* 目录树折叠结构 */
.toc-item-wrapper {
    display: flex;
    flex-direction: column;
}

.toc-item-row {
    display: flex;
    align-items: center;
}

.toc-collapse-btn {
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 10px;
    flex-shrink: 0;
    border-radius: 3px;
    margin-left: 4px;
    transition: background-color 0.2s, color 0.2s;
}

.toc-collapse-btn:hover {
    background-color: rgba(74, 144, 217, 0.1);
    color: var(--primary-color);
}

.toc-collapse-placeholder {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    margin-left: 4px;
}

.toc-children {
    margin-left: 8px;
    padding-left: 10px;
    border-left: 1px solid var(--border-color);
    overflow: hidden;
    max-height: 2000px;
    transition: max-height 0.3s ease, opacity 0.2s ease;
}

.toc-children.collapsed {
    max-height: 0;
    opacity: 0;
    padding: 0;
    border: none;
}

.toc-item {
    display: block;
    flex: 1;
    padding: 6px 12px 6px 8px;
    font-size: 13px;
    color: var(--text-secondary);
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    border-left: 2px solid transparent;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.toc-item:hover {
    background: var(--bg-color);
    color: var(--text-color);
}

.toc-item.active {
    background: rgba(74, 144, 217, 0.1);
    border-left-color: var(--primary-color);
    color: var(--primary-color);
}

/* 不同层级的缩进 */
.toc-item.toc-h1 { padding-left: 16px; font-weight: 600; }
.toc-item.toc-h2 { padding-left: 28px; }
.toc-item.toc-h3 { padding-left: 40px; font-size: 12px; }
.toc-item.toc-h4 { padding-left: 52px; font-size: 12px; }
.toc-item.toc-h5 { padding-left: 64px; font-size: 12px; }
.toc-item.toc-h6 { padding-left: 76px; font-size: 12px; }

/* 目录面板显示时，预览内容需要留出空间 */
.content-area.toc-visible .preview-container {
    margin-right: 260px;
}

/* 目录切换按钮激活状态 */
#tocToggle.active,
#searchToggle.active {
    background: rgba(74, 144, 217, 0.1);
    color: var(--primary-color);
}

/* 文档内查找面板 */
.search-panel {
    position: fixed;
    top: 0;
    right: 300px;
    z-index: 1000;
    transform: translateY(-100%);
    transition: transform 0.3s ease;
}

.search-panel.show {
    transform: translateY(0);
}

.search-panel-content {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: var(--toolbar-bg);
    border: 1px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 8px 8px;
    box-shadow: var(--shadow-md);
}

.search-input-group {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 6px 12px;
    min-width: 280px;
}

.search-input-group i {
    color: var(--text-muted);
    font-size: 14px;
}

.search-input-group input {
    flex: 1;
    border: none;
    background: transparent;
    color: var(--text-color);
    font-size: 14px;
    outline: none;
    min-width: 200px;
}

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

.search-count {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
}

.search-buttons {
    display: flex;
    gap: 4px;
}

.search-buttons .btn-icon-small {
    padding: 6px 8px;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 4px;
    transition: var(--transition);
}

.search-buttons .btn-icon-small:hover {
    background: var(--bg-color);
    color: var(--text-color);
}

.search-buttons .btn-icon-small:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 搜索高亮样式 */
.search-highlight {
    background-color: #ffeb3b;
    color: #000;
    border-radius: 2px;
    padding: 0 1px;
}

.search-highlight.current {
    background-color: #ff9800;
    box-shadow: 0 0 0 2px rgba(255, 152, 0, 0.4);
}

/* 全局文档搜索面板 */
.global-search-panel {
    position: fixed;
    bottom: 0;
    left: var(--sidebar-width);
    right: 0;
    height: 0;
    background: var(--sidebar-bg);
    border-top: 1px solid var(--border-color);
    display: none;
    flex-direction: column;
    transition: height 0.3s ease;
    z-index: 200;
    overflow: hidden;
}

.global-search-panel.show {
    display: flex;
    height: 300px;
}

/* 当全局搜索面板打开时调整主内容区域 */
.main-content.search-panel-open .content-area {
    margin-bottom: 300px;
}

.sidebar.collapsed ~ .main-content .global-search-panel,
.global-search-panel.sidebar-collapsed {
    left: 0;
}

.global-search-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    background: var(--toolbar-bg);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.global-search-input-group {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 8px 14px;
}

.global-search-input-group i {
    color: var(--text-muted);
    font-size: 14px;
}

.global-search-input-group input {
    flex: 1;
    border: none;
    background: transparent;
    color: var(--text-color);
    font-size: 14px;
    outline: none;
}

.global-search-input-group input::placeholder {
    color: var(--text-muted);
}

.global-search-status {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
}

.global-search-buttons {
    display: flex;
    gap: 6px;
}

.global-search-buttons .btn-icon-small {
    padding: 8px 10px;
    background: var(--primary-color);
    border: none;
    color: white;
    cursor: pointer;
    border-radius: 4px;
    transition: var(--transition);
}

.global-search-buttons .btn-icon-small:hover {
    background: var(--primary-hover);
}

.global-search-buttons .btn-icon-small:last-child {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.global-search-buttons .btn-icon-small:last-child:hover {
    background: var(--bg-color);
    color: var(--text-color);
}

.global-search-results {
    flex: 1;
    overflow-y: auto;
    padding: 0;
}

.global-search-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
    gap: 12px;
}

.global-search-empty i {
    font-size: 32px;
    opacity: 0.5;
}

.global-search-empty p {
    font-size: 14px;
}

/* 搜索结果项 */
.search-result-file {
    border-bottom: 1px solid var(--border-color);
}

/* 搜索结果工具栏 */
.search-results-toolbar {
    display: flex;
    gap: 8px;
    padding: 8px 16px;
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 10;
}

.search-results-toolbar .btn-small {
    padding: 4px 10px;
    font-size: 12px;
    border: 1px solid var(--border-color);
    background-color: var(--content-bg);
    color: var(--text-secondary);
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: all 0.2s;
}

.search-results-toolbar .btn-small:hover {
    background-color: rgba(74, 144, 217, 0.1);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.search-results-toolbar .btn-small i {
    font-size: 10px;
}

.search-result-file-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: var(--bg-color);
    font-size: 13px;
    font-weight: 600;
    color: var(--text-color);
    cursor: pointer;
    transition: var(--transition);
    user-select: none;
}

/* 文件折叠按钮 */
.file-collapse-btn {
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 10px;
    flex-shrink: 0;
    transition: color 0.2s;
}

.search-result-file-header:hover .file-collapse-btn {
    color: var(--primary-color);
}

.search-result-file-header:hover {
    background: rgba(74, 144, 217, 0.1);
}

.search-result-file-header i {
    color: var(--primary-color);
}

.search-result-file-header .file-path {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.search-result-file-header .match-count {
    font-size: 11px;
    background: var(--primary-color);
    color: white;
    padding: 2px 8px;
    border-radius: 10px;
    font-weight: normal;
}

.search-result-matches {
    background: var(--content-bg);
    overflow: hidden;
    max-height: 5000px;
    transition: max-height 0.3s ease, opacity 0.2s ease, padding 0.2s ease;
}

.search-result-matches.collapsed {
    max-height: 0;
    opacity: 0;
    padding: 0;
}

.search-result-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 8px 20px 8px 40px;
    cursor: pointer;
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.search-result-item:hover {
    background: var(--bg-color);
    border-left-color: var(--primary-color);
}

.search-result-item .line-number {
    font-size: 11px;
    color: var(--text-muted);
    min-width: 40px;
    text-align: right;
    font-family: monospace;
}

.search-result-item .line-content {
    flex: 1;
    font-size: 13px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.search-result-item .line-content mark,
.search-result-item .line-content .search-match-highlight {
    background-color: #ffeb3b;
    color: #000;
    padding: 0 2px;
    border-radius: 2px;
}

/* 搜索进度 */
.search-progress {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    gap: 10px;
    color: var(--text-muted);
}

.search-progress i {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* 无结果 */
.search-no-results {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    color: var(--text-muted);
    gap: 10px;
}

.search-no-results i {
    font-size: 28px;
    opacity: 0.5;
}

/* ==================== 导出功能下拉菜单 ==================== */
.export-dropdown {
    position: relative;
    display: inline-block;
}

.export-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--content-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    min-width: 160px;
    z-index: 1000;
    display: none;
    overflow: hidden;
    margin-top: 4px;
}

.export-menu.show {
    display: block;
    animation: fadeInDown 0.2s ease;
}

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

.export-option {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 12px 16px;
    border: none;
    background: transparent;
    color: var(--text-color);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
}

.export-option:hover {
    background: var(--bg-color);
}

.export-option i {
    width: 18px;
    text-align: center;
}

.export-option i.fa-file-pdf {
    color: #dc3545;
}

.export-option i.fa-file-word {
    color: #2b579a;
}

.export-option i.fa-file-code {
    color: #e34c26;
}

/* 导出进度遮罩 */
.export-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.export-progress {
    background: var(--content-bg);
    padding: 30px 50px;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.export-progress i {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 15px;
    animation: spin 1s linear infinite;
}

.export-progress p {
    color: var(--text-color);
    font-size: 16px;
}

/* 批量导出进度条样式 */
.batch-export-progress {
    min-width: 350px;
    max-width: 500px;
}

.batch-export-progress .batch-message {
    margin-bottom: 15px;
    word-break: break-all;
    font-size: 14px;
}

.batch-progress-bar {
    width: 100%;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    margin: 15px 0;
}

.batch-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--success-color));
    border-radius: 4px;
    transition: width 0.3s ease;
}

.batch-counter {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 10px;
}

/* 导出菜单分隔线 */
.export-divider {
    height: 1px;
    background: var(--border-color);
    margin: 8px 0;
}