/* 未定义组件隐藏，防止闪烁 */
:not(:defined) {
  visibility: hidden;
}

body {
  margin: 0;
  font-family: 'Roboto', sans-serif;
  min-height: 100vh;
}

/* 布局 */
.app-layout {
  display: flex;
  min-height: 100vh;
}

.top-app-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
}

.app-bar-spacer {
  height: 64px;
}

/* 阅读进度条 */
.reading-progress {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 91;
  background: transparent;
  display: none;
}

.reading-progress-bar {
  height: 100%;
  width: 0%;
  background: rgb(var(--mdui-color-primary));
  transition: width 0.1s linear;
  border-radius: 0 2px 2px 0;
}

/* 侧边栏 - 电脑端 */
.sidebar {
  width: 280px;
  height: 100vh;
  position: fixed;
  left: 0;
  top: 0;
  z-index: 100;
  border-radius: 0 !important;
  transition: width 0.3s cubic-bezier(0.2, 0, 0, 1);
  overflow-x: hidden;
  --mdui-elevation-level: 2;
}

.sidebar-inner {
  padding: 16px;
  display: flex;
  flex-direction: column;
  height: 100%;
  box-sizing: border-box;
}

.sidebar.collapsed {
  width: 72px;
}

.sidebar.collapsed .sidebar-text,
.sidebar.collapsed .search-wrap,
.sidebar.collapsed .site-meta {
  display: none;
}

/* 站点品牌 */
.site-brand {
  text-align: center;
  margin-bottom: 16px;
}

.site-avatar {
  width: 64px;
  height: 64px;
  margin: 0 auto 8px;
}

.site-name {
  font-weight: 500;
}

.site-desc {
  opacity: 0.7;
  margin-top: 4px;
}

/* 搜索 */
.search-wrap {
  position: relative;
  margin-bottom: 8px;
}

.search-field {
  width: 100%;
}

.search-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  z-index: 250;
  max-height: 320px;
  overflow-y: auto;
  display: none;
  background: rgb(var(--mdui-color-surface-container));
  border-radius: var(--mdui-shape-corner-medium);
  box-shadow: var(--mdui-elevation-level3);
  padding: 4px 0;
}

/* 导航 */
.nav-list {
  flex: 1;
  overflow-y: auto;
}

.nav-divider {
  margin: 8px 0;
}

/* 主题切换 */
.theme-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  padding: 12px 0;
  min-height: 48px;
}

.theme-wrap mdui-button-icon {
  opacity: 0.4;
  transition: opacity 0.2s, background-color 0.2s;
}

.theme-wrap mdui-button-icon.active {
  opacity: 1;
  background-color: rgba(var(--mdui-color-primary), 0.15);
  color: rgb(var(--mdui-color-primary));
}

/* 主内容区 */
.main-content {
  flex: 1;
  margin-left: 280px;
  transition: margin-left 0.3s cubic-bezier(0.2, 0, 0, 1);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.main-content.sidebar-collapsed {
  margin-left: 72px;
}

/* 页面过渡 */
.page-transition {
  animation: pageFadeIn 0.3s cubic-bezier(0.2, 0, 0, 1);
  flex: 1;
  padding: 16px;
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
}

@keyframes pageFadeIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 文章正文 */
.post-content img,
.post-content video {
  max-width: 100%;
  height: auto;
  border-radius: var(--mdui-shape-corner-medium);
  display: block;
}

.post-content video {
  margin: 1rem 0;
  background: #000;
}

.post-content img {
  cursor: zoom-in;
}

/* 代码块样式 */
.post-content pre {
  position: relative;
  background: rgb(var(--mdui-color-surface-container-highest));
  border: 1px solid rgba(var(--mdui-color-outline-variant), 0.5);
  border-radius: var(--mdui-shape-corner-medium);
  padding: 16px;
  padding-top: 40px;
  overflow-x: auto;
  max-width: 100%;
  -webkit-overflow-scrolling: touch;
}

.post-content pre code {
  display: block;
  font-family: 'SF Mono', 'Fira Code', 'JetBrains Mono', 'Cascadia Code', Consolas, Monaco, monospace;
  font-size: 14px;
  line-height: 1.6;
  white-space: pre;
  word-wrap: normal;
  tab-size: 2;
  background: transparent;
  border: none;
  padding: 0;
  margin: 0;
}

/* 代码块复制按钮 */
.code-copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: var(--mdui-shape-corner-small);
  background: rgba(var(--mdui-color-surface-container-highest), 0.8);
  color: rgb(var(--mdui-color-on-surface-variant));
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.2s, background 0.2s;
  backdrop-filter: blur(4px);
  z-index: 10;
}

pre:hover .code-copy-btn {
  opacity: 1;
}

.code-copy-btn:hover {
  background: rgba(var(--mdui-color-surface-container-highest), 1);
}

/* 懒加载占位 */
img[loading="lazy"] {
  background: rgb(var(--mdui-color-surface-variant));
  /* min-height: 120px; */
}

/* 页脚 */
.footer {
  padding: 32px 24px;
  text-align: center;
  margin-top: auto;
}

.footer-rss {
  margin-bottom: 12px;
}

.footer-link {
  text-decoration: none;
  color: rgb(var(--mdui-color-primary));
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
}

.footer-copy {
  opacity: 0.7;
}

.footer-icp {
  opacity: 0.5;
  margin-top: 4px;
}

/* 文章目录侧边栏 */
.toc-sidebar {
  position: fixed;
  top: 64px;
  right: 0;
  width: 260px;
  height: calc(100vh - 64px);
  z-index: 80;
  border-radius: 0 !important;
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.2, 0, 0, 1);
  overflow-y: auto;
  --mdui-elevation-level: 2;
}

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

.toc-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
}

.toc-content {
  padding: 8px 0;
}

.toc-list {
  display: flex;
  flex-direction: column;
}

.toc-link {
  display: block;
  padding: 8px 16px;
  color: rgb(var(--mdui-color-on-surface-variant));
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  border-radius: var(--mdui-shape-corner-small);
  margin: 1px 8px;
  transition: background 0.15s, color 0.15s;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.toc-link:hover {
  background: rgba(var(--mdui-color-primary), 0.08);
  color: rgb(var(--mdui-color-primary));
}

.toc-link.active {
  background: rgba(var(--mdui-color-primary), 0.12);
  color: rgb(var(--mdui-color-primary));
  font-weight: 500;
}

/* 手机端 (< 840px) */
@media (max-width: 839px) {
  .sidebar {
    width: 280px;
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.2, 0, 0, 1);
    border-radius: 0 var(--mdui-shape-corner-extra-large) var(--mdui-shape-corner-extra-large) 0 !important;
  }

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

  .main-content {
    margin-left: 0 !important;
  }

  .sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(var(--mdui-color-scrim), 0.4);
    z-index: 99;
    backdrop-filter: blur(2px);
  }

  .sidebar-overlay.active {
    display: block;
  }

  .toc-sidebar {
    width: 280px;
    top: 0;
    height: 100vh;
    border-radius: var(--mdui-shape-corner-extra-large) 0 0 var(--mdui-shape-corner-extra-large) !important;
    z-index: 101;
  }

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

/* 归档标签云 */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

/* 朋友卡片网格 */
.friends-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.friend-card {
  transition: transform 0.2s, box-shadow 0.2s;
}

.friend-card:hover {
  transform: translateY(-2px);
  --mdui-elevation-level: 3;
}

/* 文章卡片 */
.post-card {
  transition: transform 0.2s, box-shadow 0.2s;
}

.post-card:hover {
  transform: translateY(-2px);
  --mdui-elevation-level: 3;
}

/* 404 */
.not-found {
  text-align: center;
  padding: 80px 24px;
}

.not-found-icon {
  font-size: 72px;
  opacity: 0.4;
}

/* 灯箱覆盖层 */
.medium-zoom-overlay {
  background: rgba(var(--mdui-color-scrim), 0.9) !important;
}

/* 桌面端主内容区适配 TOC */
@media (min-width: 1200px) {
  .page-transition {
    max-width: 800px;
    margin-left: calc(280px + (100% - 280px - 260px - 800px) / 2);
  }

  .main-content.sidebar-collapsed .page-transition {
    margin-left: calc(72px + (100% - 72px - 260px - 800px) / 2);
  }
}

@media (min-width: 840px) and (max-width: 1199px) {
  .page-transition {
    max-width: 700px;
  }
}

/* 搜索结果下拉框 */
.search-result-item {
  padding: 12px 16px;
  cursor: pointer;
  border-radius: var(--mdui-shape-corner-small);
  margin: 2px 8px;
  transition: background 0.15s;
}

.search-result-item:hover {
  background: rgba(var(--mdui-color-primary), 0.08);
}

.search-result-title {
  font-size: 15px;
  font-weight: 500;
  color: rgb(var(--mdui-color-on-surface));
  line-height: 1.4;
}

.search-result-desc {
  font-size: 12px;
  color: rgb(var(--mdui-color-on-surface-variant));
  margin-top: 2px;
  opacity: 0.7;
}

.search-no-result {
  padding: 16px;
  text-align: center;
  color: rgb(var(--mdui-color-on-surface-variant));
  font-size: 14px;
}


/* PlantUML 图表容器 */
.plantuml {
  margin: 1.5rem auto;
  text-align: center;
  overflow-x: auto;
  padding: 16px;
  background: rgb(var(--mdui-color-surface-container-low));
  border-radius: var(--mdui-shape-corner-medium);
  border: 1px solid rgba(var(--mdui-color-outline-variant), 0.3);
}

.plantuml-img {
  max-width: 100%;
  height: auto;
  display: inline-block;
}

/* PlantUML 暗色主题适配 */
.mdui-theme-dark .plantuml {
  background: rgb(var(--mdui-color-surface-container-highest));
}

/* ==================== MDX 组件样式 ==================== */

.mdx-alert {
  display: flex;
  gap: 12px;
  padding: 16px;
  border-radius: var(--mdui-shape-corner-medium);
  margin: 16px 0;
  border-left: 4px solid;
  align-items: flex-start;
}

.mdx-alert-info {
  background: rgba(var(--mdui-color-primary), 0.08);
  border-color: rgb(var(--mdui-color-primary));
}

.mdx-alert-warning {
  background: rgba(var(--mdui-color-tertiary), 0.08);
  border-color: rgb(var(--mdui-color-tertiary));
}

.mdx-alert-success {
  background: rgba(var(--mdui-color-secondary), 0.08);
  border-color: rgb(var(--mdui-color-secondary));
}

.mdx-alert-error {
  background: rgba(var(--mdui-color-error), 0.08);
  border-color: rgb(var(--mdui-color-error));
}

.mdx-alert-icon {
  font-size: 20px;
  line-height: 1.5;
  flex-shrink: 0;
}

.mdx-alert-content {
  flex: 1;
  min-width: 0;
}

.mdx-alert-content > *:first-child { margin-top: 0; }
.mdx-alert-content > *:last-child { margin-bottom: 0; }

.mdx-card {
  border: 1px solid rgba(var(--mdui-color-outline-variant), 0.5);
  border-radius: var(--mdui-shape-corner-large);
  padding: 20px;
  margin: 16px 0;
  background: rgb(var(--mdui-color-surface-container-low));
}

.mdx-card-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  color: rgb(var(--mdui-color-primary));
}

.mdx-card-body > *:first-child { margin-top: 0; }
.mdx-card-body > *:last-child { margin-bottom: 0; }

.mdx-badge {
  display: inline-flex;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  margin-right: 6px;
  line-height: 1.5;
}

.mdx-badge-primary {
  background: rgba(var(--mdui-color-primary), 0.15);
  color: rgb(var(--mdui-color-primary));
}

.mdx-badge-success {
  background: rgba(var(--mdui-color-tertiary), 0.15);
  color: rgb(var(--mdui-color-tertiary));
}

.mdx-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 16px 0;
}

.mdx-column {
  min-width: 0;
}

.mdx-column > *:first-child { margin-top: 0; }
.mdx-column > *:last-child { margin-bottom: 0; }

/* ========== GitHub 卡片自定义语法 ========== */
.gh-wrap { margin: 16px 0; }
.gh-card {
  padding: 16px;
  cursor: pointer;
  max-width: 480px;
  display: block;
}
.gh-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  pointer-events: none;
}
.gh-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  flex-shrink: 0;
}
.gh-info {
  flex: 1;
  min-width: 0;
}
.gh-name {
  font-size: var(--mdui-typescale-title-medium-size);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.gh-desc {
  font-size: var(--mdui-typescale-body-small-size);
  opacity: 0.6;
  margin-top: 2px;
}
.gh-badges {
  display: flex;
  gap: 6px;
  align-items: center;
  flex-wrap: wrap;
}
.gh-badges a {
  display: inline-flex;
  flex-shrink: 0;
  line-height: 0;
}
.gh-badges img {
  height: 20px;
  display: inline-block !important;
  min-height: auto !important;
  vertical-align: middle;
}
/* ========================================== */