/* 全局样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* 深色主题 */
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --bg-hover: #30363d;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  --border-color: #30363d;
  --border-light: #484f58;
  --accent-color: #58a6ff;
  --accent-hover: #79c0ff;
  --accent-bg: rgba(88, 166, 255, 0.15);
  --success-color: #3fb950;
  --success-bg: rgba(63, 185, 80, 0.15);
  --error-color: #f85149;
  --error-bg: rgba(248, 81, 73, 0.15);
  --warning-color: #d29922;
  --warning-bg: rgba(210, 153, 34, 0.15);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
}

body.light-theme {
  /* 浅色主题 */
  --bg-primary: #ffffff;
  --bg-secondary: #f6f8fa;
  --bg-tertiary: #eaeef2;
  --bg-hover: #d0d7de;
  --text-primary: #24292f;
  --text-secondary: #57606a;
  --text-muted: #6e7681;
  --border-color: #d0d7de;
  --border-light: #babbbd;
  --accent-color: #0969da;
  --accent-hover: #218bff;
  --accent-bg: rgba(9, 105, 218, 0.1);
  --success-color: #1a7f37;
  --success-bg: rgba(26, 127, 55, 0.1);
  --error-color: #cf222e;
  --error-bg: rgba(207, 34, 46, 0.1);
  --warning-color: #9a6700;
  --warning-bg: rgba(154, 103, 0, 0.1);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
}

body {
  font-family:
    -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica,
    Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji';
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  height: 100vh;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* Header */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 24px;
  height: 60px;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.header-left {
  display: flex;
  align-items: center;
}

.logo {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-right {
  display: flex;
  gap: 6px;
}

/* Main Content */
.main {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.editor-container,
.preview-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.editor-container {
  border-right: 1px solid var(--border-color);
}

/* 预览模式样式 */
body.preview-mode .editor-container {
  display: none;
}

body.preview-mode .preview-container {
  flex: 1;
  width: 100%;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
  height: 44px;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.panel-title {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.char-count {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.url-warning {
  font-size: 11px;
  color: var(--error-color);
  background-color: var(--error-bg);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  cursor: help;
}

.url-warning-approach {
  color: var(--warning-color);
  background-color: var(--warning-bg);
}

/* 浏览器 URL 限制状态样式 */
.url-over-limit {
  color: var(--error-color);
  font-weight: 500;
}

.url-ok {
  color: var(--success-color);
  font-weight: 500;
}

/* Editor Wrapper */
.editor-wrapper {
  display: flex;
  flex: 1;
  overflow: hidden;
  position: relative;
}

/* Line Numbers */
.line-numbers {
  width: 48px;
  padding: 16px 8px;
  background-color: var(--bg-secondary);
  color: var(--text-muted);
  font-family: 'SF Mono', 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 13px;
  line-height: 1.6;
  text-align: right;
  user-select: none;
  overflow-y: auto;
  overflow-x: hidden;
  border-right: 1px solid var(--border-color);
}

/* 隐藏行号滚动条 */
.line-numbers::-webkit-scrollbar {
  width: 0;
  height: 0;
}

.line-number {
  display: block;
  min-height: 1.6em;
}

/* Editor */
.editor {
  flex: 1;
  width: 100%;
  padding: 16px 20px;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  border: none;
  resize: none;
  font-family: 'SF Mono', 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 13px;
  line-height: 1.6;
  outline: none;
  tab-size: 4;
}

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

/* Preview */
.preview {
  flex: 1;
  padding: 24px 32px;
  overflow-y: auto;
  background-color: var(--bg-primary);
}

/* Markdown 样式 */
.preview h1,
.preview h2,
.preview h3,
.preview h4,
.preview h5,
.preview h6 {
  margin-top: 28px;
  margin-bottom: 16px;
  font-weight: 600;
  line-height: 1.25;
  color: var(--text-primary);
}

.preview h1 {
  font-size: 2em;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
}

.preview h2 {
  font-size: 1.5em;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.preview h3 {
  font-size: 1.25em;
}

.preview h4 {
  font-size: 1.1em;
}

.preview p {
  margin-bottom: 16px;
  color: var(--text-primary);
}

.preview a {
  color: var(--accent-color);
  text-decoration: none;
  transition: color 0.2s ease;
}

.preview a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

.preview code {
  background-color: var(--accent-bg);
  color: var(--accent-color);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'SF Mono', 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 0.9em;
}

.preview pre {
  background-color: var(--bg-secondary);
  padding: 16px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: 20px;
  border: 1px solid var(--border-color);
}

.preview pre code {
  background-color: transparent;
  padding: 0;
  color: var(--text-primary);
}

.preview blockquote {
  border-left: 3px solid var(--accent-color);
  padding-left: 16px;
  margin: 20px 0;
  color: var(--text-secondary);
  font-style: italic;
}

.preview ul,
.preview ol {
  margin-bottom: 16px;
  padding-left: 24px;
}

.preview li {
  margin-bottom: 6px;
  color: var(--text-primary);
}

.preview table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 20px;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.preview th,
.preview td {
  border: 1px solid var(--border-color);
  padding: 10px 14px;
  text-align: left;
}

.preview th {
  background-color: var(--bg-secondary);
  font-weight: 600;
  color: var(--text-primary);
}

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

.preview img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.preview hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 28px 0;
}

/* Mermaid 图表样式 */
.preview .mermaid {
  text-align: center;
  margin: 24px 0;
  background-color: var(--bg-secondary);
  padding: 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
  background-color: transparent;
  color: var(--text-primary);
}

.btn-primary {
  background-color: var(--success-color);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: #2ea043;
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

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

.btn-secondary:hover {
  background-color: var(--bg-hover);
  border-color: var(--border-light);
  transform: translateY(-1px);
}

.btn-secondary:active {
  transform: translateY(0);
}

.btn .icon {
  font-size: 14px;
}

/* GitHub 链接样式 */
.github-link {
  padding: 8px 12px;
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.github-link:hover {
  background-color: var(--bg-hover);
  border-color: var(--border-light);
  transform: translateY(-1px);
}

.github-icon {
  color: var(--text-primary);
  transition: color 0.2s ease;
}

.github-link:hover .github-icon {
  color: var(--accent-color);
}

/* Footer */
.footer {
  padding: 10px 24px;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.footer-info {
  font-size: 12px;
  color: var(--text-muted);
}

/* Toast */
.toast {
  position: fixed;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background-color: var(--success-color);
  color: white;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1000;
  box-shadow: var(--shadow-lg);
}

.toast.show {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.toast.error {
  background-color: var(--error-color);
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 1000;
}

.modal.show {
  display: flex;
  justify-content: center;
  align-items: center;
}

.modal-content {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 600px;
  max-height: 80vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.modal-close {
  background: none;
  border: none;
  font-size: 20px;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

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

.modal-body {
  padding: 20px 24px;
  overflow-y: auto;
}

/* Template List */
.template-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}

.template-item {
  padding: 18px;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.template-item:hover {
  border-color: var(--accent-color);
  background-color: var(--bg-secondary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.template-item h3 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.template-item p {
  font-size: 12px;
  color: var(--text-secondary);
}

/* 响应式设计 */
@media (max-width: 768px) {
  .main {
    flex-direction: column;
  }

  .editor-container {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }

  .header {
    flex-direction: column;
    gap: 12px;
    height: auto;
    padding: 16px;
  }

  .header-right {
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
  }

  .btn {
    flex: 1;
    min-width: 90px;
    justify-content: center;
  }

  .editor-wrapper {
    flex-direction: column;
  }

  .line-numbers {
    width: 100%;
    text-align: left;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    padding: 8px 16px;
    display: none;
  }

  .preview {
    padding: 16px 20px;
  }
}

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 5px;
  border: 2px solid transparent;
  background-clip: content-box;
}

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

/* 选中文字样式 */
::selection {
  background-color: var(--accent-bg);
  color: var(--accent-color);
}

/* 自动补全弹出框 */
.autocomplete {
  position: absolute;
  top: 0;
  left: 0;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  max-height: 300px;
  overflow-y: auto;
  z-index: 100;
  min-width: 200px;
  max-width: 400px;
}

.autocomplete.hidden {
  display: none;
}

.autocomplete-item {
  padding: 10px 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--border-color);
  transition: background-color 0.15s ease;
}

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

.autocomplete-item:hover,
.autocomplete-item.active {
  background-color: var(--bg-hover);
}

.autocomplete-item-icon {
  font-size: 16px;
  min-width: 24px;
  text-align: center;
}

.autocomplete-item-content {
  flex: 1;
}

.autocomplete-item-title {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.autocomplete-item-desc {
  font-size: 11px;
  color: var(--text-secondary);
}

.autocomplete-item-preview {
  font-family: 'SF Mono', 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 11px;
  color: var(--text-muted);
  background-color: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: 3px;
}

/* 自动补全分组标题 */
.autocomplete-group {
  padding: 8px 14px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background-color: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
}