/* 基础样式 */
:root {
    /* 深色主题变量 */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3d3d3d;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-tertiary: #808080;
    --accent-primary: #4a9eff;
    --accent-secondary: #3a7dcc;
    --border-color: #404040;
    --success-color: #2ecc71;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --info-color: #3498db;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    height: 100vh;
    overflow: hidden;
}

.container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: relative;
}

/* 头部样式 */
.header {
    background: var(--bg-secondary);
    padding: 15px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.header-left h1 {
    font-size: 1.8rem;
    margin-bottom: 5px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.version {
    background: var(--bg-tertiary);
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* 按钮样式 */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 0.95rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.btn:hover {
    transform: translateY(-2px);
}

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

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

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

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

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

.btn-danger:hover {
    background: #c0392b;
}

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

.btn-info:hover {
    background: #2980b9;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover {
    background: var(--bg-tertiary);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.85rem;
}

.btn-tool {
    padding: 8px 12px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-radius: 4px;
}

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

.btn-view {
    padding: 8px 12px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-radius: 4px;
}

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

.btn-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 5px;
}

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

/* 控制栏样式 */
.control-bar {
    background: var(--bg-secondary);
    padding: 10px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.toolbar {
    display: flex;
    gap: 10px;
    align-items: center;
}

.tool-group {
    display: flex;
    gap: 5px;
    align-items: center;
}

.separator {
    width: 1px;
    height: 20px;
    background: var(--border-color);
    margin: 0 5px;
}

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

.theme-switch {
    display: flex;
    align-items: center;
    gap: 8px;
}

.theme-switch select {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
}

.view-switch {
    display: flex;
    gap: 5px;
}

/* 编辑器容器样式 */
.editor-container {
    display: flex;
    flex: 1;
    overflow: hidden;
    padding: 20px;
    gap: 20px;
}

.editor-section, .preview-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    opacity: 1;
    transition: all 0.3s ease;
}

.editor-section.hidden, .preview-section.hidden {
    flex: 0;
    opacity: 0;
    overflow: hidden;
}

.section-header {
    background: var(--bg-tertiary);
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.section-header h3 {
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-stats {
    display: flex;
    gap: 15px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.preview-controls {
    display: flex;
    gap: 8px;
}

.editor-wrapper, .preview-wrapper {
    flex: 1;
    overflow: hidden;
    position: relative;
}

/* 编辑器样式 */
.editor {
    width: 100%;
    height: 100%;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: none;
    padding: 20px;
    font-family: 'Monaco', 'Consolas', 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.6;
    resize: none;
    outline: none;
}

.editor:focus {
    outline: none;
}

.editor::placeholder {
    color: var(--text-tertiary);
}

/* 预览区域样式 */
.preview {
    padding: 20px;
    height: 100%;
    overflow-y: auto;
    background: var(--bg-primary);
}

.markdown-body {
    box-sizing: border-box;
    min-width: 200px;
    max-width: 980px;
    margin: 0 auto;
    padding: 20px;
}

.markdown-body img {
    max-width: 100%;
    height: auto;
}

.markdown-body pre {
    background: #2d2d2d;
    border-radius: 6px;
    padding: 16px;
    overflow: auto;
    margin: 1em 0;
}

.markdown-body code {
    background: rgba(255, 255, 255, 0.1);
    padding: 2px 4px;
    border-radius: 3px;
    font-family: 'Monaco', 'Consolas', monospace;
}

.markdown-body table {
    border-collapse: collapse;
    width: 100%;
    margin: 1em 0;
}

.markdown-body table th,
.markdown-body table td {
    border: 1px solid var(--border-color);
    padding: 8px 12px;
}

.markdown-body blockquote {
    border-left: 4px solid var(--accent-primary);
    margin: 1em 0;
    padding-left: 1em;
    color: var(--text-secondary);
}

/* 底部样式 */
.footer {
    background: var(--bg-secondary);
    padding: 10px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
}

.status-bar {
    display: flex;
    gap: 20px;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.auto-save {
    display: flex;
    align-items: center;
    gap: 10px;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-tertiary);
    transition: .4s;
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--success-color);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.85rem;
}

.status-indicator.active {
    color: var(--success-color);
}

.status-indicator.inactive {
    color: var(--text-tertiary);
}

/* 侧边栏样式 */
.sidebar {
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    width: 300px;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 100;
    display: flex;
    flex-direction: column;
}

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

.sidebar-header {
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.toc {
    margin-bottom: 20px;
}

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

.toc li {
    margin: 5px 0;
}

.toc a {
    color: var(--text-secondary);
    text-decoration: none;
    display: block;
    padding: 5px 10px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.toc a:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.file-info {
    background: var(--bg-tertiary);
    border-radius: 8px;
    padding: 15px;
    margin-top: 20px;
}

.info-grid {
    display: grid;
    gap: 10px;
    margin-top: 10px;
}

.info-item {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
}

.info-label {
    color: var(--text-secondary);
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: 12px;
    max-width: 800px;
    width: 100%;
    max-height: 80vh;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

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

.modal-header h2 {
    font-size: 1.3rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.modal-body {
    padding: 20px;
    max-height: 60vh;
    overflow-y: auto;
}

/* 帮助页面样式 */
.help-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.tab-btn {
    padding: 8px 16px;
    background: var(--bg-tertiary);
    border: none;
    color: var(--text-secondary);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.syntax-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 15px;
}

.syntax-item {
    background: var(--bg-tertiary);
    padding: 15px;
    border-radius: 6px;
    border-left: 4px solid var(--accent-primary);
}

.syntax-example {
    font-family: 'Monaco', 'Consolas', monospace;
    color: var(--accent-primary);
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.syntax-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.shortcut-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 15px;
}

.shortcut-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 12px 15px;
    background: var(--bg-tertiary);
    border-radius: 6px;
}

.shortcut-item kbd {
    background: var(--bg-primary);
    padding: 4px 8px;
    border-radius: 4px;
    font-family: 'Monaco', 'Consolas', monospace;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
    min-width: 100px;
    text-align: center;
}

.feature-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.feature-item {
    display: flex;
    gap: 15px;
    align-items: flex-start;
}

.feature-item i {
    color: var(--accent-primary);
    font-size: 1.2rem;
    margin-top: 3px;
}

.feature-item h4 {
    margin-bottom: 5px;
    color: var(--text-primary);
}

.feature-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* 导出页面样式 */
.export-options {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 15px;
    margin-bottom: 30px;
}

.export-option {
    background: var(--bg-tertiary);
    border-radius: 8px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.export-option:hover {
    border-color: var(--accent-primary);
}

.export-icon {
    font-size: 2rem;
    color: var(--accent-primary);
}

.export-info h3 {
    margin-bottom: 5px;
    color: var(--text-primary);
}

.export-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.export-btn {
    margin-left: auto;
}

.export-settings {
    background: var(--bg-tertiary);
    border-radius: 8px;
    padding: 20px;
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
    margin-top: 15px;
}

.setting-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.setting-item label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: var(--text-secondary);
}

.setting-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .editor-container {
        flex-direction: column;
    }
    
    .editor-section, .preview-section {
        flex: none;
        height: 50%;
    }
    
    .syntax-grid,
    .shortcut-list,
    .feature-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .control-bar {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
    
    .settings {
        width: 100%;
        justify-content: space-between;
    }
    
    .toolbar {
        flex-wrap: wrap;
    }
    
    .section-stats {
        display: none;
    }
    
    .footer {
        flex-direction: column;
        gap: 10px;
        align-items: flex-start;
    }
}

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

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

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

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

/* 全屏模式 */
.fullscreen {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    z-index: 9999 !important;
    border-radius: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
}

.fullscreen .section-header {
    display: none !important;
}

.fullscreen .preview-wrapper {
    height: 100% !important;
}

.fullscreen .preview {
    height: 100% !important;
    padding: 40px !important;
}

.fullscreen #fullscreenPreview i::before {
    content: "\f066" !important;
}

/* 加载动画 */
.loading {
    position: relative;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 30px;
    height: 30px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* 提示框 */
.tooltip {
    position: relative;
}

.tooltip::before {
    content: attr(title);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: 5px 10px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-radius: 4px;
    font-size: 0.8rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 100;
}

.tooltip:hover::before {
    opacity: 1;
    visibility: visible;
    bottom: calc(100% + 5px);
}