/* Theme enhancements: typography, layout width, header polish */
:root {
  --accent: #0a66c2;
}

/* 整体容器最大宽度 */
.container {
  max-width: 1400px;
}

/* 三栏布局：左侧目录 | 中间文章 | 右侧大纲 */
.layout-3 {
  grid-template-columns: 250px 1fr 250px;
}

/* 中等屏幕（960-1399px）：两栏 */
@media (min-width: 960px) and (max-width: 1399px) {
  .container {
    max-width: 970px;
  }

  .layout-3 {
    grid-template-columns: 1fr 220px;
  }
}

/* 手机端：单栏布局，侧边栏和大纲变为浮动抽屉 */
@media (max-width: 959px) {
  .layout-3 {
    grid-template-columns: 1fr;
    /* 单栏 */
  }
}

/* 文章标题样式 */
.content h1 {
  font-size: 2.1rem;
  margin: 0 0 1rem 0; /* 一级标题下边距 */
  line-height: 1.12;
  letter-spacing: -0.02em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 2rem; /* 一级标题与横线的距离 */
}

.content h2 {
  font-size: 1.6rem;
  margin-top: 1.2rem;
}

.post-meta {
  margin-top: 10px;
  margin-bottom: 18px;
}

/* 顶部栏样式增强 */
.site-header {
  background: color-mix(in oklab, var(--bg) 94%, transparent);
  backdrop-filter: blur(6px) saturate(1.05);
  box-shadow: 0 6px 22px rgba(2, 6, 23, 0.06);
}

.brand {
  font-weight: 800;
  letter-spacing: 0.2px;
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  height: 56px;
}

.header-inner .nav {
  display: flex;
  gap: 4px;
  margin-right: auto;
}

.header-inner .nav-link {
  padding: 6px 12px;
  font-size: 14px;
}

/* 内嵌搜索框 */
.header-search {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 4px 12px;
  width: 220px;
  transition: width 0.2s ease, box-shadow 0.2s ease;
}

.header-search:focus-within {
  width: 280px;
  border-color: var(--link);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--link) 15%, transparent);
}

.header-search-icon {
  font-size: 14px;
  margin-right: 6px;
  opacity: 0.6;
}

.header-search-input {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--text);
  font-size: 14px;
  outline: none;
  min-width: 0;
}

.header-search-input::placeholder {
  color: var(--muted);
}

/* 搜索结果下拉 */
.header-search-results {
  position: absolute;
  top: calc(100% + 8px);
  left: -60px;
  right: -60px;
  width: 400px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
  max-height: 480px;
  overflow-y: auto;
  display: none;
  z-index: 200;
}

.header-search-results.open {
  display: block;
}

.header-search-results .search-item {
  display: block;
  padding: 12px 16px;
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
}

.header-search-results .search-item:last-child {
  border-bottom: none;
}

.header-search-results .search-item:hover,
.header-search-results .search-item.active {
  background: var(--surface);
}

.header-search-results .search-item-title {
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 4px;
  color: var(--text);
}

.header-search-results .search-item-title mark {
  background: #fff3a3;
  color: inherit;
  padding: 0 2px;
  border-radius: 2px;
}

.header-search-results .search-item-path {
  font-size: 12px;
  color: var(--muted);
}

.header-search-results .search-item-snippet {
  font-size: 13px;
  color: var(--muted);
  margin-top: 6px;
  line-height: 1.5;
}

.header-search-results .search-item-snippet mark {
  background: #fff3a3;
  color: #333;
  padding: 0 2px;
  border-radius: 2px;
}

.header-search-results .search-item-tags {
  margin-top: 8px;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.header-search-results .search-tag {
  display: inline-block;
  padding: 2px 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 11px;
  color: var(--muted);
}

.header-search-results .search-no-result {
  padding: 24px 16px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}

/* 移动端搜索按钮（电脑端隐藏） */
.search-toggle {
  display: none;
}

/* 移动端隐藏内嵌搜索框，显示按钮 */
@media (max-width: 959px) {
  .header-search {
    display: none;
  }

  .search-toggle {
    display: inline-flex;
  }

  .header-inner .nav {
    display: none;
  }

  .header-inner .nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 8px 16px;
  }

  .header-inner {
    flex-wrap: wrap;
  }

  .menu-toggle,
  .sidebar-toggle,
  .toc-toggle {
    display: inline-flex;
  }
}

/* 按钮样式 */
.theme-toggle,
.icon-button,
.drawer-toggle,
.menu-toggle {
  transition: transform 0.14s ease, box-shadow 0.14s ease;
}

.theme-toggle:hover,
.icon-button:hover {
  transform: translateY(-2px);
}

/* 内容淡入动画 */
@keyframes contentFadeIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }

  to {
    opacity: 1;
    transform: none;
  }
}

.content {
  animation: contentFadeIn 360ms ease both;
}

/* 引用样式 */
.content blockquote {
  border-left-width: 6px;
  padding-left: 14px;
}

/* 代码高亮样式调整 */
.content pre[class*="language-"],
.content pre.highlight {
  position: relative;
  background: #1e1e1e;
  border: 1px solid #3a3a3a;
  border-radius: 8px;
  padding: 14px;
  overflow-x: auto;
  color: #d4d4d4;
  font-family: "Fira Code", "JetBrains Mono", Consolas, Monaco, "Courier New", monospace;
}

/* 有语言标识的代码块增加顶部空间 */
.content pre[data-language] {
  padding-top: 36px;
}

/* 语言标签 */
.content pre[data-language]::before {
  content: attr(data-language);
  position: absolute;
  top: 0;
  right: 0;
  padding: 4px 12px;
  font-size: 12px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: #888;
  background: #2a2a2a;
  border-bottom-left-radius: 6px;
  border-top-right-radius: 7px;
  text-transform: none;
  user-select: none;
}

.content pre[class*="language-"] code,
.content pre.highlight code {
  background: transparent;
  padding: 0;
  color: #d4d4d4;
  font-family: inherit;
}

/* 行内代码样式 */
.content :not(pre)>code {
  background: #f0f0f0;
  color: #d63384;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
  font-family: "Fira Code", "JetBrains Mono", Consolas, Monaco, "Courier New", monospace;
}

/* 深色模式下的行内代码 */
[data-theme="dark"] .content :not(pre)>code {
  background: #3a3a3a;
  color: #f592b6;
}

[data-theme="dark"] .content :not(pre)>code:hover {
  background-color: color-mix(in oklab, var(--link) 10%, var(--surface));
  color: var(--link);
}

@media (prefers-color-scheme: dark) {
  .content :not(pre)>code {
    background: #3a3a3a;
    color: #f592b6;
  }
  .content :not(pre)>code:hover {
    background-color: color-mix(in oklab, var(--link) 10%, var(--surface));
    color: var(--link);
  }
}

/* Footer 样式 */
.site-footer {
  font-size: 13px;
  padding-top: 14px;
  padding-bottom: 14px;
}

/* 大纲样式 */
#toc a,
#toc li {
  word-break: break-word;
  overflow-wrap: break-word;
  hyphens: auto;
}

#toc ul {
  padding-left: 16px;
  margin: 0;
}

#toc li {
  margin-bottom: 4px;
  line-height: 1.4;
}

#toc {
  padding-right: 14px;
}

#toc::-webkit-scrollbar {
  width: 6px;
}

#toc::-webkit-scrollbar-track {
  background: transparent;
  margin: 8px 0;
}

#toc::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 3px;
}

/* ====== 手机端抽屉从两侧滑出 ====== */
@media (max-width: 959px) {

  /* 遮罩层 */
  .drawer-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    z-index: 105;
  }

  .drawer-overlay.active {
    opacity: 1;
    visibility: visible;
  }

  /* 左侧文章目录抽屉 */
  .sidebar-col {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    bottom: 0 !important;
    right: auto !important;
    width: min(80vw, 300px) !important;
    max-height: 100vh !important;
    height: 100vh !important;
    background: var(--bg) !important;
    border: none !important;
    border-right: 1px solid var(--border) !important;
    border-radius: 0 !important;
    padding: calc(var(--header-h, 56px) + 16px) 16px 24px 16px !important;
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.15) !important;
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 120 !important;
    overflow-y: auto !important;
    display: block;
  }

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

  /* 右侧大纲抽屉 */
  #toc {
    position: fixed !important;
    top: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    left: auto !important;
    width: min(80vw, 280px) !important;
    max-height: 100vh !important;
    height: 100vh !important;
    background: var(--bg) !important;
    border: none !important;
    border-left: 1px solid var(--border) !important;
    border-radius: 0 !important;
    padding: calc(var(--header-h, 56px) + 16px) 20px 24px 16px !important;
    box-shadow: -4px 0 24px rgba(0, 0, 0, 0.15) !important;
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 120 !important;
    overflow-y: auto !important;
    display: block;
  }

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

  /* 隐藏原来的下拉箭头 */
  #toc .toc-title::after {
    display: none;
  }
}

/* ====== 电脑端：确保正常显示 ====== */
@media (min-width: 960px) {
  .drawer-overlay {
    display: none !important;
  }

  .sidebar-col {
    transform: none !important;
    position: sticky !important;
    display: block !important;
  }

  #toc {
    transform: none !important;
    position: sticky !important;
    display: block !important;
  }

  /* 电脑端隐藏移动端按钮 */
  .menu-toggle,
  .sidebar-toggle,
  .toc-toggle,
  .search-toggle {
    display: none !important;
  }
}