/* ============================================================
 * editor.css — Markdown 编辑器样式
 * 融合 Layui 工具栏风格 + 现代编辑器美学
 * 依赖：design-tokens.css, utilities.css, components.css
 * ============================================================ */

/* ----------------------------------------------------------
 * 1. 编辑器容器
 * ---------------------------------------------------------- */
.md-editor {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-bg-secondary);
  font-family: var(--font-sans);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.md-editor:focus-within {
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px rgba(247, 164, 29, 0.15);
}

/* ----------------------------------------------------------
 * 2. 工具栏（Layui 风格按钮组）
 * ---------------------------------------------------------- */
.md-editor-toolbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 2px;
  padding: var(--space-2) var(--space-3);
  background-color: var(--color-bg-tertiary);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

/* 工具栏按钮 */
.md-toolbar-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: var(--text-sm);
  position: relative;
}

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

.md-toolbar-btn.active {
  background-color: var(--color-primary-100);
  color: var(--color-primary-600);
}

.md-toolbar-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

/* 工具栏分隔线 */
.md-toolbar-divider {
  width: 1px;
  height: 20px;
  background-color: var(--color-border);
  margin: 0 var(--space-1);
  flex-shrink: 0;
}

/* 工具栏下拉选择 */
.md-toolbar-select {
  height: 32px;
  padding: 0 var(--space-2);
  font-size: var(--text-xs);
  font-family: inherit;
  color: var(--color-text-secondary);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  outline: none;
  appearance: none;
  padding-right: 24px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 10 10'%3E%3Cpath fill='%236b7280' d='M5 7L1 3h8z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
}

.md-toolbar-select:hover {
  border-color: var(--color-primary-400);
}

/* 工具栏右侧操作区 */
.md-toolbar-actions {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: auto;
}

/* 工具栏 Tooltip */
.md-toolbar-btn[data-tooltip] {
  position: relative;
}

.md-toolbar-btn[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 8px;
  font-size: var(--text-xs);
  color: #ffffff;
  background-color: var(--color-gray-900);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  z-index: var(--z-tooltip);
}

.md-toolbar-btn[data-tooltip]::before {
  content: '';
  position: absolute;
  bottom: calc(100% + 2px);
  left: 50%;
  transform: translateX(-50%);
  border: 4px solid transparent;
  border-top-color: var(--color-gray-900);
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  z-index: var(--z-tooltip);
}

.md-toolbar-btn[data-tooltip]:hover::after,
.md-toolbar-btn[data-tooltip]:hover::before {
  opacity: 1;
  visibility: visible;
}

/* ----------------------------------------------------------
 * 3. 编辑器主体（左右分栏）
 * ---------------------------------------------------------- */
.md-editor-body {
  display: flex;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

/* ----------------------------------------------------------
 * 4. 输入区域（左侧）
 * ---------------------------------------------------------- */
.md-editor-input {
  flex: 1;
  position: relative;
  display: flex;
  min-width: 0;
}

.md-editor-input textarea {
  width: 100%;
  height: 100%;
  min-height: 400px;
  padding: var(--space-5);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-text);
  background-color: transparent;
  border: none;
  outline: none;
  resize: none;
  tab-size: 2;
  white-space: pre-wrap;
  word-wrap: break-word;
}

.md-editor-input textarea::placeholder {
  color: var(--color-text-muted);
}

/* 行号区域 */
.md-editor-lines {
  position: absolute;
  top: 0;
  left: 0;
  width: 48px;
  height: 100%;
  padding: var(--space-5) 0;
  background-color: var(--color-bg-tertiary);
  border-right: 1px solid var(--color-border);
  overflow: hidden;
  user-select: none;
  pointer-events: none;
}

.md-editor-lines .line-number {
  display: block;
  padding-right: var(--space-3);
  text-align: right;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.7;
  color: var(--color-text-muted);
}

.md-editor-input.has-lines textarea {
  padding-left: 56px;
}

/* ----------------------------------------------------------
 * 5. 分栏拖拽条
 * ---------------------------------------------------------- */
.md-editor-resizer {
  width: 4px;
  cursor: col-resize;
  background-color: var(--color-border);
  transition: background-color var(--transition-fast);
  flex-shrink: 0;
  position: relative;
}

.md-editor-resizer:hover,
.md-editor-resizer.dragging {
  background-color: var(--color-primary-400);
}

.md-editor-resizer::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 2px;
  height: 24px;
  background-color: var(--color-text-muted);
  border-radius: var(--radius-full);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.md-editor-resizer:hover::after {
  opacity: 0.5;
}

/* ----------------------------------------------------------
 * 6. 预览区域（右侧）
 * ---------------------------------------------------------- */
.md-editor-preview {
  flex: 1;
  padding: var(--space-5);
  overflow-y: auto;
  border-left: 1px solid var(--color-border);
  background-color: var(--color-bg-secondary);
  min-width: 0;
}

/* 预览区排版样式 */
.md-editor-preview h1,
.md-editor-preview h2,
.md-editor-preview h3,
.md-editor-preview h4,
.md-editor-preview h5,
.md-editor-preview h6 {
  font-family: var(--font-sans);
  font-weight: var(--font-bold);
  color: var(--color-text);
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
  line-height: var(--leading-tight);
}

.md-editor-preview h1 { font-size: var(--text-3xl); margin-top: 0; }
.md-editor-preview h2 { font-size: var(--text-2xl); padding-bottom: var(--space-2); border-bottom: 1px solid var(--color-border); }
.md-editor-preview h3 { font-size: var(--text-xl); }
.md-editor-preview h4 { font-size: var(--text-lg); }
.md-editor-preview h5 { font-size: var(--text-base); }
.md-editor-preview h6 { font-size: var(--text-sm); color: var(--color-text-secondary); }

.md-editor-preview p {
  margin-bottom: var(--space-4);
  line-height: var(--leading-relaxed);
  color: var(--color-text-secondary);
}

.md-editor-preview a {
  color: var(--color-primary-600);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-fast);
}

.md-editor-preview a:hover {
  border-bottom-color: var(--color-primary-600);
}

.md-editor-preview strong {
  font-weight: var(--font-semibold);
  color: var(--color-text);
}

.md-editor-preview em {
  font-style: italic;
}

.md-editor-preview del {
  text-decoration: line-through;
  color: var(--color-text-muted);
}

/* 列表 */
.md-editor-preview ul,
.md-editor-preview ol {
  padding-left: var(--space-6);
  margin-bottom: var(--space-4);
}

.md-editor-preview ul {
  list-style-type: disc;
}

.md-editor-preview ol {
  list-style-type: decimal;
}

.md-editor-preview li {
  margin-bottom: var(--space-1);
  line-height: var(--leading-relaxed);
  color: var(--color-text-secondary);
}

.md-editor-preview li > ul,
.md-editor-preview li > ol {
  margin-top: var(--space-1);
  margin-bottom: 0;
}

/* 任务列表 */
.md-editor-preview .task-list-item {
  list-style: none;
  position: relative;
  margin-left: calc(var(--space-6) * -1);
  padding-left: var(--space-6);
}

.md-editor-preview .task-list-item input[type="checkbox"] {
  margin-right: var(--space-2);
}

/* 引用 */
.md-editor-preview blockquote {
  margin: 0 0 var(--space-4) 0;
  padding: var(--space-3) var(--space-4);
  border-left: 4px solid var(--color-primary-400);
  background-color: var(--color-primary-50);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.dark .md-editor-preview blockquote {
  background-color: rgba(247, 164, 29, 0.08);
}

.md-editor-preview blockquote p {
  margin-bottom: 0;
}

.md-editor-preview blockquote blockquote {
  margin-top: var(--space-3);
}

/* 代码 */
.md-editor-preview code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  padding: 2px 6px;
  background-color: var(--color-bg-tertiary);
  border-radius: var(--radius-sm);
  color: var(--color-primary-600);
}

.md-editor-preview pre {
  margin: 0 0 var(--space-4) 0;
  padding: var(--space-4);
  background-color: var(--dark-bg);
  border-radius: var(--radius-md);
  overflow-x: auto;
  border: 1px solid var(--color-border);
}

.md-editor-preview pre code {
  display: block;
  padding: 0;
  background: transparent;
  border-radius: 0;
  color: var(--dark-text);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

/* 代码高亮（通用） */
.md-editor-preview pre .hljs-keyword    { color: #c678dd; }
.md-editor-preview pre .hljs-string     { color: #98c379; }
.md-editor-preview pre .hljs-number     { color: #d19a66; }
.md-editor-preview pre .hljs-comment    { color: #5c6370; font-style: italic; }
.md-editor-preview pre .hljs-function   { color: #61afef; }
.md-editor-preview pre .hljs-title      { color: #61afef; }
.md-editor-preview pre .hljs-params     { color: var(--dark-text); }
.md-editor-preview pre .hljs-built_in   { color: #e6c07b; }
.md-editor-preview pre .hljs-literal    { color: #56b6c2; }
.md-editor-preview pre .hljs-type       { color: #e6c07b; }
.md-editor-preview pre .hljs-meta       { color: #61afef; }
.md-editor-preview pre .hljs-attr       { color: #d19a66; }

/* 表格 */
.md-editor-preview table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-4);
  font-size: var(--text-sm);
}

.md-editor-preview th,
.md-editor-preview td {
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  text-align: left;
}

.md-editor-preview th {
  font-weight: var(--font-semibold);
  background-color: var(--color-bg-tertiary);
  color: var(--color-text);
}

.md-editor-preview tr:nth-child(even) {
  background-color: var(--color-bg-tertiary);
}

/* 水平线 */
.md-editor-preview hr {
  border: none;
  height: 1px;
  background-color: var(--color-border);
  margin: var(--space-6) 0;
}

/* 图片 */
.md-editor-preview img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin: var(--space-2) 0;
}

/* ----------------------------------------------------------
 * 7. 底部状态栏
 * ---------------------------------------------------------- */
.md-editor-statusbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-1) var(--space-3);
  background-color: var(--color-bg-tertiary);
  border-top: 1px solid var(--color-border);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  flex-shrink: 0;
  user-select: none;
}

.md-editor-statusbar-left,
.md-editor-statusbar-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.md-editor-statusbar-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.md-editor-statusbar-item.clickable {
  cursor: pointer;
  padding: 2px 4px;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.md-editor-statusbar-item.clickable:hover {
  background-color: var(--color-bg-hover);
  color: var(--color-text-secondary);
}

/* 保存状态指示 */
.md-editor-statusbar .save-status {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.md-editor-statusbar .save-status.saved {
  color: var(--color-success-500);
}

.md-editor-statusbar .save-status.unsaved {
  color: var(--color-warning-500);
}

.md-editor-statusbar .save-status.saving {
  color: var(--color-info-500);
}

/* ----------------------------------------------------------
 * 8. 全屏模式
 * ---------------------------------------------------------- */
.md-editor-fullscreen {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  border-radius: 0;
  border: none;
}

.md-editor-fullscreen .md-editor-body {
  flex: 1;
}

.md-editor-fullscreen .md-editor-input textarea {
  min-height: 0;
}

/* ----------------------------------------------------------
 * 9. 只读模式
 * ---------------------------------------------------------- */
.md-editor-readonly .md-editor-toolbar {
  display: none;
}

.md-editor-readonly .md-editor-input {
  display: none;
}

.md-editor-readonly .md-editor-resizer {
  display: none;
}

.md-editor-readonly .md-editor-preview {
  border-left: none;
  flex: 1;
}

/* ----------------------------------------------------------
 * 10. 纯编辑模式（无预览）
 * ---------------------------------------------------------- */
.md-editor-editonly .md-editor-preview {
  display: none;
}

.md-editor-editonly .md-editor-resizer {
  display: none;
}

.md-editor-editonly .md-editor-input {
  flex: 1;
}

/* ----------------------------------------------------------
 * 11. 纯预览模式
 * ---------------------------------------------------------- */
.md-editor-previewonly .md-editor-input {
  display: none;
}

.md-editor-previewonly .md-editor-resizer {
  display: none;
}

.md-editor-previewonly .md-editor-preview {
  border-left: none;
  flex: 1;
}

/* ----------------------------------------------------------
 * 12. 编辑器主题（暗色）
 * ---------------------------------------------------------- */
.dark .md-editor {
  background-color: var(--dark-bg-secondary);
  border-color: var(--dark-border);
}

.dark .md-editor-toolbar {
  background-color: var(--dark-bg-tertiary);
  border-bottom-color: var(--dark-border);
}

.dark .md-toolbar-btn:hover {
  background-color: var(--dark-bg-hover);
}

.dark .md-toolbar-btn.active {
  background-color: rgba(247, 164, 29, 0.15);
}

.dark .md-editor-input textarea {
  color: var(--dark-text);
}

.dark .md-editor-input textarea::placeholder {
  color: var(--dark-text-muted);
}

.dark .md-editor-lines {
  background-color: var(--dark-bg);
  border-right-color: var(--dark-border);
}

.dark .md-editor-lines .line-number {
  color: var(--dark-text-muted);
}

.dark .md-editor-resizer {
  background-color: var(--dark-border);
}

.dark .md-editor-resizer:hover,
.dark .md-editor-resizer.dragging {
  background-color: var(--color-primary-400);
}

.dark .md-editor-preview {
  background-color: var(--dark-bg-secondary);
  border-left-color: var(--dark-border);
}

.dark .md-editor-preview h1,
.dark .md-editor-preview h2,
.dark .md-editor-preview h3,
.dark .md-editor-preview h4,
.dark .md-editor-preview h5,
.dark .md-editor-preview h6 {
  color: var(--dark-text);
}

.dark .md-editor-preview h2 {
  border-bottom-color: var(--dark-border);
}

.dark .md-editor-preview p,
.dark .md-editor-preview li {
  color: var(--dark-text-secondary);
}

.dark .md-editor-preview code {
  background-color: var(--dark-bg-tertiary);
  color: var(--color-primary-400);
}

.dark .md-editor-preview pre {
  background-color: var(--dark-bg);
  border-color: var(--dark-border);
}

.dark .md-editor-preview pre code {
  color: var(--dark-text);
}

.dark .md-editor-preview blockquote {
  background-color: rgba(247, 164, 29, 0.08);
}

.dark .md-editor-preview th {
  background-color: var(--dark-bg-tertiary);
  color: var(--dark-text);
}

.dark .md-editor-preview th,
.dark .md-editor-preview td {
  border-color: var(--dark-border);
}

.dark .md-editor-preview tr:nth-child(even) {
  background-color: var(--dark-bg-tertiary);
}

.dark .md-editor-preview hr {
  background-color: var(--dark-border);
}

.dark .md-editor-preview a {
  color: var(--color-primary-400);
}

.dark .md-editor-preview a:hover {
  border-bottom-color: var(--color-primary-400);
}

.dark .md-editor-statusbar {
  background-color: var(--dark-bg-tertiary);
  border-top-color: var(--dark-border);
  color: var(--dark-text-muted);
}

.dark .md-editor-statusbar-item.clickable:hover {
  background-color: var(--dark-bg-hover);
  color: var(--dark-text-secondary);
}

/* ----------------------------------------------------------
 * 13. 编辑器尺寸变体
 * ---------------------------------------------------------- */
.md-editor-sm .md-editor-input textarea {
  min-height: 200px;
  font-size: var(--text-xs);
  padding: var(--space-3);
}

.md-editor-sm .md-editor-preview {
  padding: var(--space-3);
}

.md-editor-sm .md-toolbar-btn {
  width: 28px;
  height: 28px;
  font-size: var(--text-xs);
}

.md-editor-lg .md-editor-input textarea {
  min-height: 600px;
  font-size: var(--text-base);
  padding: var(--space-6);
}

.md-editor-lg .md-editor-preview {
  padding: var(--space-6);
}

/* ----------------------------------------------------------
 * 14. 快捷键提示
 * ---------------------------------------------------------- */
.md-shortcut-hint {
  display: inline-flex;
  align-items: center;
  padding: 1px 5px;
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 3px;
  line-height: 1.4;
}

/* ----------------------------------------------------------
 * 15. 大纲导航（目录）
 * ---------------------------------------------------------- */
.md-editor-toc {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 200px;
  padding: var(--space-4);
  background-color: var(--color-bg-tertiary);
  border-left: 1px solid var(--color-border);
  overflow-y: auto;
  font-size: var(--text-xs);
}

.md-editor-toc-title {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  margin-bottom: var(--space-2);
}

.md-editor-toc a {
  display: block;
  padding: var(--space-1) 0;
  color: var(--color-text-secondary);
  text-decoration: none;
  line-height: var(--leading-normal);
  transition: color var(--transition-fast);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.md-editor-toc a:hover {
  color: var(--color-primary-600);
}

.md-editor-toc a.active {
  color: var(--color-primary-600);
  font-weight: var(--font-medium);
}

.md-editor-toc .toc-h2 { padding-left: 0; }
.md-editor-toc .toc-h3 { padding-left: var(--space-3); }
.md-editor-toc .toc-h4 { padding-left: var(--space-6); }