.project-docs-page {
  height: calc(100vh - 64px);
  margin: -16px;
  padding: 8px;
  box-sizing: border-box;
  overflow: hidden;
  background: var(--bg-color);
}

.docs-layout {
  height: 100%;
  background: var(--bg-color);
}

.docs-sider {
  border-right: 1px solid var(--border-color);
  height: 100%;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--sider-bg);
}

/* 修复 Sider 内部 flex 布局 */
.docs-sider .ant-layout-sider-children {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.docs-sider-header {
  padding: 12px 10px 12px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--header-bg);
}

.docs-sider-header h2 {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0;
  color: var(--text-color);
  line-height: 1.1;
  text-transform: none;
}

.docs-sider-title-row {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.docs-sider-title-row h2 {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.project-back-button {
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--text-color-secondary);
  font-size: 16px;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.project-back-button:hover {
  background: var(--item-hover-bg);
  color: var(--text-color);
  transform: translateX(-1px);
}

.project-back-button:focus-visible {
  outline: 2px solid rgba(22, 119, 255, 0.35);
  outline-offset: 2px;
}

.docs-sider-actions {
  display: flex;
  align-items: center;
}

.mode-actions-row {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.mode-actions-group {
  display: inline-flex;
  align-items: center;
}

.docs-sider-actions .mode-actions-group .ant-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  color: var(--text-color-secondary);
}

.docs-sider-actions .mode-actions-group .ant-btn:hover {
  background: var(--item-hover-bg);
  border-color: var(--border-color);
  color: var(--link-color);
}

.docs-menu {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  border-right: none;
  background: var(--sider-bg);
  color: var(--text-color);
}

.docs-menu .ant-menu-item,
.docs-menu .ant-menu-submenu-title {
  overflow: hidden;
}

.docs-menu .ant-menu-title-content {
  display: flex;
  align-items: center;
  min-width: 0;
  overflow: hidden;
}

.docs-menu-label {
  display: flex;
  align-items: center;
  gap: 6px;
  width: 100%;
  min-width: 0;
}

.docs-menu-label-text {
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.docs-menu-share-icon {
  color: var(--link-color);
  font-size: 12px;
  flex: none;
  opacity: 0.9;
}

.docs-content-layout {
  position: relative;
  height: 100%;
  background: var(--bg-color);
}

.docs-content {
  height: 100%;
  overflow-y: auto;
  background: var(--bg-color);
}

.docs-content-header {
  position: sticky;
  top: 0;
  z-index: 5;
  min-height: 57px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-color);
  background: var(--header-bg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.docs-header-title {
  display: flex;
  align-items: center;
  min-width: 0;
  flex: 1;
  overflow: hidden;
  white-space: nowrap;
  gap: 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-color);
}

.docs-header-item {
  display: inline-flex;
  align-items: center;
  min-width: 0;
  flex: 0 1 auto;
  gap: 6px;
}

.docs-header-icon {
  font-size: 15px;
  color: var(--text-color-secondary);
  flex: none;
}

.docs-header-text {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.docs-header-actions {
  flex: none;
}

.pdf-header-toolbar {
  min-width: 0;
  overflow-x: auto;
  overflow-y: hidden;
}

.pdf-header-toolbar .pdf-toolbar {
  white-space: nowrap;
}

.docs-content-wrapper {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px;
  min-height: 100%;
}

.docs-content-wrapper.large-markdown-mode {
  max-width: 100%;
  height: calc(100% - 57px);
  min-height: 0;
  padding: 0 0 24px;
}

/* PDF模式下使用全宽 */
.docs-content-wrapper.pdf-mode {
  max-width: 100%;
  padding: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.docs-loading {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 400px;
}

.docs-folder-placeholder {
  min-height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--text-color-secondary);
  font-size: 14px;
}

/* ===== 文件夹内容视图 ===== */
.docs-folder-view {
  padding: 4px 0 24px;
}

.docs-folder-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
  margin-bottom: 16px;
  background: var(--bg-color-secondary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  color: var(--text-color-secondary);
  font-size: 13px;
  min-width: 0;
}

.docs-folder-path {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.docs-folder-path-icon {
  flex: none;
  color: #faad14;
  font-size: 15px;
}

.docs-folder-path-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 500;
  color: var(--text-color);
}

.docs-folder-counts {
  flex: none;
  white-space: nowrap;
}

.docs-folder-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 14px;
}

.docs-folder-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  padding: 16px 18px;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: var(--card-bg);
  cursor: pointer;
  transition: all 0.2s ease;
  min-width: 0;
}

.docs-folder-item:hover {
  border-color: var(--link-color);
  box-shadow: var(--panel-shadow);
  transform: translateY(-2px);
}

.docs-folder-item:active {
  transform: translateY(0);
}

.docs-folder-item-icon {
  font-size: 28px;
  line-height: 1;
  color: #faad14;
}

.docs-folder-item-icon.md {
  color: var(--link-color);
}

.docs-folder-item-icon.pdf {
  color: #f5222d;
}

.docs-folder-item-name {
  width: 100%;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-color);
  min-width: 0;
}

.docs-folder-item-share {
  flex: none;
  color: var(--link-color);
  font-size: 12px;
}

.docs-folder-item-count {
  font-size: 12px;
  color: var(--text-color-secondary);
}

.markdown-body {
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-color);
}

.markdown-body h1 {
  font-size: 32px;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-color);
}

.markdown-body h2 {
  font-size: 24px;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-color);
}

.markdown-body h3, 
.markdown-body h4, 
.markdown-body h5, 
.markdown-body h6 {
  font-weight: 600;
  margin-top: 20px;
  margin-bottom: 12px;
  color: var(--text-color);
}

.markdown-body h3 { font-size: 20px; }

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

.markdown-body code {
  background-color: var(--code-bg);
  padding: 2px 6px;
  border-radius: 3px;
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 14px;
  color: var(--text-color);
}

.markdown-body pre {
  background-color: var(--code-bg);
  padding: 16px;
  border-radius: 6px;
  overflow-x: auto;
  margin-bottom: 16px;
}

.markdown-body pre code {
  background-color: transparent;
  padding: 0;
  color: inherit;
}

.markdown-body blockquote {
  padding: 0 16px;
  border-left: 4px solid var(--blockquote-border-color);
  color: var(--blockquote-text-color);
  margin-bottom: 16px;
}

.markdown-body table {
  border-collapse: collapse;
  width: 100%;
  margin-bottom: 16px;
  display: block;
  overflow-x: auto;
}

.markdown-body th,
.markdown-body td {
  border: 1px solid var(--table-border-color);
  padding: 8px 13px;
  color: var(--text-color);
}

.markdown-body th {
  background-color: var(--table-header-bg);
  font-weight: 600;
}

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

.markdown-body a {
  color: var(--link-color);
  text-decoration: none;
}

.markdown-body a:hover {
  text-decoration: underline;
}

.markdown-body ul,
.markdown-body ol {
  margin-bottom: 16px;
  padding-left: 2em;
  color: var(--text-color);
}

.markdown-body li {
  margin-bottom: 4px;
}

@media (max-width: 768px) {
  .project-docs-page {
    padding: 8px;
  }
}