:root {
  --bg: #f6f8fa;
  --card: #ffffff;
  --text: #1f2328;
  --muted: #656d76;
  --accent: #0969da;
  --accent-light: #ddf4ff;
  --border: #d0d7de;
  --code-bg: #f6f8fa;
  --blockquote-border: #d0d7de;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "PingFang SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* 文档页：侧栏固定，仅正文滚动 */
body:not(.export-mode):not(.index-page) {
  height: 100vh;
  overflow: hidden;
}

.layout {
  display: grid;
  grid-template-columns: var(--panel-left-width, 0px) minmax(0, 1fr) var(--panel-right-width, 0px);
  min-height: 100vh;
  transition: grid-template-columns 0.25s ease;
}

body:not(.export-mode):not(.index-page) .layout {
  height: 100vh;
  min-height: 0;
  overflow: hidden;
}

body:not(.export-mode):not(.index-page) .layout > * {
  min-height: 0;
  min-width: 0;
}

.layout.has-left-panel,
.layout.has-right-panel {
  --panel-width: 280px;
}

.layout.has-left-panel {
  --panel-left-width: var(--panel-width);
}

.layout.has-right-panel {
  --panel-right-width: var(--panel-width);
}

.layout.panel-left-hidden.has-left-panel {
  --panel-left-width: 0px;
}

.layout.panel-right-hidden.has-right-panel {
  --panel-right-width: 0px;
}

/* 半透明边缘切换按钮，悬停时完全显示 */
.panel-toggle {
  position: fixed;
  top: 50%;
  z-index: 300;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.65rem;
  height: 3.25rem;
  padding: 0;
  transform: translateY(-50%);
  border: 1px solid rgba(208, 215, 222, 0.45);
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(6px);
  color: var(--muted);
  font-size: 0.75rem;
  cursor: pointer;
  opacity: 0.22;
  transition: opacity 0.2s, background 0.2s, color 0.2s, border-color 0.2s;
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.06);
}

.panel-toggle:hover,
.panel-toggle:focus-visible {
  opacity: 1;
  color: var(--accent);
  background: rgba(255, 255, 255, 0.92);
  border-color: var(--accent);
  outline: none;
}

.panel-toggle-left {
  left: 0;
  border-left: none;
  border-radius: 0 10px 10px 0;
}

.panel-toggle-right {
  right: 0;
  border-right: none;
  border-radius: 10px 0 0 10px;
}

.panel-toggle .toggle-icon-expand { display: none; }

.layout.panel-left-hidden .panel-toggle-left .toggle-icon-collapse { display: none; }
.layout.panel-left-hidden .panel-toggle-left .toggle-icon-expand { display: inline; }

.layout.panel-right-hidden .panel-toggle-right .toggle-icon-collapse { display: none; }
.layout.panel-right-hidden .panel-toggle-right .toggle-icon-expand { display: inline; }

nav.sidebar,
aside.sidebar {
  height: 100%;
  background: var(--card);
  overflow: hidden;
  transition: opacity 0.2s ease;
  display: flex;
  flex-direction: column;
}

.sidebar-left {
  border-right: 1px solid var(--border);
}

.sidebar-right {
  border-left: 1px solid var(--border);
}

.layout.panel-left-hidden .sidebar-left {
  opacity: 0;
  pointer-events: none;
  border-right: none;
}

.layout.panel-right-hidden .sidebar-right {
  opacity: 0;
  pointer-events: none;
  border-left: none;
}

.sidebar-inner {
  flex: 1;
  min-height: 0;
  height: 100%;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  padding: 1.25rem 1rem 1rem 1.15rem;
}

.sidebar-left .sidebar-inner h2 {
  flex-shrink: 0;
  margin-top: 0;
}

.sidebar-left .doc-list {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior: contain;
}

.sidebar-right .sidebar-inner {
  padding: 0.75rem 0.65rem 0.85rem;
}

.panel-actions {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: 0.35rem;
  flex-shrink: 0;
  padding-bottom: 0.65rem;
  margin-bottom: 0;
  border-bottom: 1px solid var(--border);
}

.panel-btn {
  display: block;
  flex: 1 1 calc(50% - 0.2rem);
  min-width: 0;
  padding: 0.38rem 0.45rem;
  border-radius: 6px;
  font-size: 0.72rem;
  font-weight: 500;
  text-align: center;
  cursor: pointer;
  text-decoration: none;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  font-family: inherit;
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.panel-actions .panel-btn:only-child {
  flex: 1 1 100%;
}

.panel-btn-link:hover {
  background: var(--accent-light);
  color: var(--accent);
  border-color: var(--accent);
}

.panel-btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.panel-btn-primary:hover:not(:disabled) {
  filter: brightness(1.06);
}

.panel-btn-primary:disabled {
  opacity: 0.65;
  cursor: wait;
}

.panel-toc {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding-top: 0.55rem;
  margin-top: 0.55rem;
  border-top: 1px solid var(--border);
}

.panel-toc-title {
  flex-shrink: 0;
  margin: 0 0 0.45rem;
  padding: 0 0.2rem;
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.panel-toc .toc {
  list-style: none;
  padding: 0;
  margin: 0;
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior: contain;
}

.panel-toc .toc li {
  margin: 0 0 0.12rem;
}

.panel-toc .toc a {
  display: block;
  padding: 0.28rem 0.4rem;
  border-radius: 5px;
  color: var(--text);
  text-decoration: none;
  font-size: 0.76rem;
  line-height: 1.42;
  white-space: normal;
  word-break: break-word;
  overflow-wrap: anywhere;
  hyphens: auto;
}

.panel-toc .toc a:hover {
  background: var(--accent-light);
  color: var(--accent);
}

.panel-toc .toc-label {
  display: block;
}

.panel-toc .toc-h1 a {
  font-weight: 600;
  font-size: 0.78rem;
}

.panel-toc .toc-h2 a {
  padding-left: 0.55rem;
  border-left: 2px solid var(--border);
  font-size: 0.75rem;
  color: var(--text);
}

.panel-toc .toc-h3 a {
  padding-left: 0.85rem;
  border-left: 2px solid rgba(208, 215, 222, 0.6);
  font-size: 0.72rem;
  color: var(--muted);
}

.panel-toc .katex {
  font-size: 0.88em;
  white-space: normal;
  word-break: break-word;
}

.panel-toc .katex-display {
  display: inline;
  margin: 0 !important;
  text-align: left;
}

nav.sidebar h2 {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin: 1.25rem 0 0.5rem;
}

nav.sidebar h2:first-child {
  margin-top: 0;
}

nav.sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

nav.sidebar li {
  margin-bottom: 0.15rem;
}

nav.sidebar a {
  display: block;
  padding: 0.35rem 0.6rem;
  border-radius: 6px;
  color: var(--text);
  text-decoration: none;
  font-size: 0.875rem;
  line-height: 1.5;
  word-break: break-word;
}

nav.sidebar .toc-label {
  display: inline;
}

nav.sidebar .katex {
  font-size: 0.92em;
}

nav.sidebar .katex-display {
  margin: 0.2em 0 !important;
  text-align: left;
}

nav.sidebar a:hover {
  background: var(--accent-light);
  color: var(--accent);
}

nav.sidebar a.active {
  background: var(--accent-light);
  color: var(--accent);
  font-weight: 600;
}

.doc-link-title {
  display: block;
  font-weight: 500;
  line-height: 1.35;
}

.doc-link-path {
  display: block;
  margin-top: 0.12rem;
  font-size: 0.72rem;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

nav.sidebar a.active .doc-link-path {
  color: var(--accent);
  opacity: 0.75;
}

.toc-h1 a { font-weight: 600; }
.toc-h2 a { padding-left: 0.6rem; }
.toc-h3 a { padding-left: 1.2rem; font-size: 0.82rem; color: var(--muted); }

main.content {
  width: 100%;
  max-width: 920px;
  justify-self: center;
  padding: 2rem 2.5rem 4rem;
}

body:not(.export-mode):not(.index-page) main.content {
  height: 100%;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior: contain;
  overflow-anchor: none;
}

.layout.panel-left-hidden.panel-right-hidden main.content,
.layout:not(.has-left-panel):not(.has-right-panel) main.content {
  max-width: 960px;
}

/* PDF export / print */
@page {
  size: A4;
  margin: 14mm 16mm 18mm;
}

body.export-mode {
  background: #fff;
}

body.export-mode .layout {
  grid-template-columns: 1fr;
}

body.export-mode main.content {
  max-width: none;
  padding: 0;
}

body.export-mode .page-header {
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
}

body.export-mode .page-header h1 {
  font-size: 1.65rem;
}

body.export-mode .markdown-body {
  font-size: 11pt;
  line-height: 1.65;
}

body.export-mode .markdown-body h1 { font-size: 1.35em; }
body.export-mode .markdown-body h2 { font-size: 1.2em; }
body.export-mode .markdown-body h3 { font-size: 1.05em; }

body.export-mode .markdown-body blockquote,
body.export-mode .markdown-body code,
body.export-mode .markdown-body pre,
body.export-mode .markdown-body th,
body.export-mode .markdown-body tr:nth-child(even) {
  background: none !important;
}

body.export-mode .markdown-body pre {
  color: inherit;
  border: 1px solid #ccc;
  font-size: 0.82em;
}

body.export-mode .markdown-body code {
  border-color: #ccc;
}

body.export-mode .markdown-body img {
  max-width: 100%;
  max-height: 240mm;
  height: auto;
  object-fit: contain;
}

/* PDF 目录页 */
.pdf-toc {
  page-break-after: always;
  break-after: page;
  margin: 0 0 1.5rem;
  padding: 0 0 1.25rem;
}

.pdf-toc-title {
  font-size: 1.35rem;
  font-weight: 700;
  text-align: center;
  margin: 0 0 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid #333;
}

.pdf-toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.pdf-toc-list li {
  margin: 0.28rem 0;
  line-height: 1.45;
}

.pdf-toc-list a {
  display: block;
  color: inherit;
  text-decoration: none;
}

.pdf-toc-h1 a { font-weight: 700; }
.pdf-toc-h2 a { padding-left: 0; }
.pdf-toc-h3 a {
  padding-left: 1.25rem;
  font-size: 0.92em;
  color: #444;
}

.pdf-toc-label {
  display: inline;
}

.pdf-toc .katex {
  font-size: 0.95em;
}

/* 尽量保持说明文字与图表/代码/公式在同一页 */
.pdf-keep-together {
  break-inside: avoid;
  page-break-inside: avoid;
}

body.export-mode .markdown-body h1,
body.export-mode .markdown-body h2,
body.export-mode .markdown-body h3,
body.export-mode .markdown-body h4 {
  break-after: avoid;
  page-break-after: avoid;
}

body.export-mode .markdown-body img,
body.export-mode .markdown-body pre,
body.export-mode .markdown-body table,
body.export-mode .markdown-body blockquote,
body.export-mode .markdown-body .katex-display,
body.export-mode .markdown-body .math-display {
  break-inside: avoid;
  page-break-inside: avoid;
}

body.export-mode .markdown-body p {
  orphans: 3;
  widows: 3;
}

body.export-mode .markdown-body li {
  break-inside: avoid;
  page-break-inside: avoid;
}

body.export-mode .markdown-body hr {
  break-after: avoid;
  page-break-after: avoid;
}

@media print {
  @page {
    size: A4;
    margin: 14mm 16mm 18mm;
  }

  body {
    background: #fff !important;
  }

  .toolbar,
  nav.sidebar,
  aside.sidebar,
  .panel-toggle {
    display: none !important;
  }

  .layout {
    grid-template-columns: 1fr !important;
  }

  main.content {
    max-width: none !important;
    padding: 0 !important;
  }

  .pdf-toc {
    page-break-after: always;
    break-after: page;
  }

  .pdf-keep-together,
  .markdown-body img,
  .markdown-body pre,
  .markdown-body table,
  .markdown-body blockquote,
  .markdown-body .katex-display,
  .markdown-body .math-display {
    break-inside: avoid;
    page-break-inside: avoid;
  }

  .markdown-body h1,
  .markdown-body h2,
  .markdown-body h3,
  .markdown-body h4 {
    break-after: avoid;
    page-break-after: avoid;
  }

  .markdown-body {
    font-size: 11pt;
  }

  .markdown-body blockquote,
  .markdown-body code,
  .markdown-body pre,
  .markdown-body th,
  .markdown-body tr:nth-child(even) {
    background: none !important;
  }

  .markdown-body pre {
    color: inherit;
    border: 1px solid #ccc;
  }

  .page-header {
    border-bottom: 1px solid #ccc;
  }

  a {
    color: inherit;
    text-decoration: none;
  }
}

header.page-header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.page-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  margin-bottom: 0.65rem;
  font-size: 0.875rem;
}

.page-breadcrumb a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.page-breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb-sep {
  color: var(--muted);
}

.breadcrumb-current {
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

header.page-header h1 {
  font-size: 2rem;
  font-weight: 700;
  margin: 0 0 0.35rem;
  line-height: 1.25;
}

header.page-header .source-file {
  margin: 0;
  color: var(--muted);
  font-size: 0.875rem;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
}

/* Markdown body — GitHub-inspired typography */
.markdown-body {
  font-size: 16px;
  line-height: 1.7;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
  margin-top: 1.5em;
  margin-bottom: 0.75em;
  font-weight: 600;
  line-height: 1.3;
  scroll-margin-top: 1.5rem;
}

.markdown-body h1 { font-size: 1.75em; border-bottom: 1px solid var(--border); padding-bottom: 0.3em; }
.markdown-body h2 { font-size: 1.4em; border-bottom: 1px solid var(--border); padding-bottom: 0.25em; }
.markdown-body h3 { font-size: 1.15em; }
.markdown-body h4 { font-size: 1em; }

.markdown-body p {
  margin: 0.75em 0;
}

.markdown-body ul,
.markdown-body ol {
  margin: 0.75em 0;
  padding-left: 1.5em;
}

.markdown-body li + li {
  margin-top: 0.25em;
}

.markdown-body blockquote {
  margin: 1em 0;
  padding: 0.5em 1em;
  border-left: 4px solid var(--blockquote-border);
  color: var(--muted);
  background: var(--code-bg);
  border-radius: 0 6px 6px 0;
}

.markdown-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2em 0;
}

.markdown-body code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.875em;
  background: var(--code-bg);
  padding: 0.15em 0.35em;
  border-radius: 4px;
  border: 1px solid var(--border);
}

.markdown-body pre {
  background: #161b22;
  color: #e6edf3;
  padding: 1em;
  border-radius: 8px;
  overflow-x: auto;
  margin: 1em 0;
}

.markdown-body pre code {
  background: none;
  border: none;
  padding: 0;
  color: inherit;
  font-size: 0.85em;
}

.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1em 0;
  font-size: 0.9em;
  display: block;
  overflow-x: auto;
}

.markdown-body th,
.markdown-body td {
  border: 1px solid var(--border);
  padding: 0.5em 0.75em;
  text-align: left;
}

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

.markdown-body tr:nth-child(even) {
  background: rgba(175, 184, 193, 0.08);
}

.markdown-body strong {
  font-weight: 600;
}

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

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

/* Math */
.math-display {
  margin: 1.25em 0;
  overflow-x: auto;
  text-align: center;
}

.math-inline {
  display: inline;
}

.katex-display {
  margin: 1em 0 !important;
}

.katex {
  font-size: 1.05em;
}

/* 去掉 LaTeX \\boxed{} 的外框 */
.katex .boxed,
.katex .fbox {
  border: none !important;
  padding: 0 !important;
  background: transparent !important;
}

/* LaTeX array → HTML（KaTeX 不支持 \\cline / @{} 列格式） */
.latex-array-display {
  margin: 1.25em 0;
  overflow-x: auto;
  text-align: center;
}

.latex-array-wrap {
  display: inline-block;
  max-width: 100%;
}

.latex-array {
  border-collapse: collapse;
  margin: 0 auto;
  font-family: KaTeX_Main, "Times New Roman", serif;
  font-size: 1.05em;
  line-height: 1.35;
}

.latex-array-cell {
  padding: 0 0.12em;
  text-align: center;
  vertical-align: bottom;
  white-space: nowrap;
}

.latex-array-cell.empty {
  color: transparent;
  user-select: none;
}

.latex-array-cline-cell {
  padding: 0;
  height: 0;
  line-height: 0;
  border: none;
}

.latex-array-cline-cell.line {
  border-bottom: 1px solid currentColor;
  height: 0.55em;
}

.latex-array tr:not(.latex-array-cline) + tr.latex-array-cline .latex-array-cline-cell.line {
  border-bottom-width: 1px;
}

@media (max-width: 768px) {
  .layout.has-left-panel {
    --panel-left-width: 0px;
  }

  .layout.has-right-panel {
    --panel-right-width: 0px;
  }

  .layout.has-left-panel:not(.panel-left-hidden) {
    --panel-width: min(85vw, 280px);
  }

  main.content {
    padding: 1.25rem;
  }

  .panel-toggle {
    opacity: 0.45;
  }
}

/* ── Index / landing page ── */
body.index-page {
  min-height: 100vh;
  background: var(--bg);
}

.index-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(9, 105, 218, 0.12), transparent),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(130, 80, 223, 0.08), transparent),
    var(--bg);
}

.index-hero {
  position: relative;
  z-index: 1;
  padding: 3rem 1.5rem 2rem;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(12px);
}

.index-hero-inner {
  max-width: 960px;
  margin: 0 auto;
}

.index-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.index-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3.25rem;
  height: 3.25rem;
  border-radius: 14px;
  background: linear-gradient(135deg, #0969da 0%, #6e40c9 100%);
  color: #fff;
  font-size: 1.65rem;
  font-weight: 700;
  box-shadow: 0 4px 14px rgba(9, 105, 218, 0.35);
}

.index-title {
  margin: 0;
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.index-subtitle {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.index-root {
  margin: 1rem 0 0;
  padding: 0.45rem 0.75rem;
  border-radius: 8px;
  background: var(--code-bg);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.8rem;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.index-main {
  position: relative;
  z-index: 1;
  max-width: 960px;
  margin: 0 auto;
  padding: 1.75rem 1.5rem 3rem;
}

.index-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  gap: 1rem;
}

.index-count {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

.index-live {
  font-size: 0.78rem;
  color: #1a7f37;
  font-weight: 500;
  transition: color 0.2s;
}

.index-live.flash {
  color: var(--accent);
}

.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.doc-card {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 1.1rem 1.15rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--card);
  color: inherit;
  text-decoration: none;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.15s;
}

.doc-card:hover {
  border-color: var(--accent);
  box-shadow: 0 6px 20px rgba(9, 105, 218, 0.12);
  transform: translateY(-2px);
}

.doc-card-icon {
  flex-shrink: 0;
  font-size: 1.35rem;
  line-height: 1;
  margin-top: 0.15rem;
}

.doc-card-body {
  flex: 1;
  min-width: 0;
}

.doc-card-title {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  font-weight: 650;
  line-height: 1.35;
  color: var(--text);
}

.doc-card-path {
  margin: 0;
  font-size: 0.78rem;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.doc-card-arrow {
  flex-shrink: 0;
  color: var(--muted);
  font-size: 1.1rem;
  transition: transform 0.2s, color 0.2s;
  margin-top: 0.1rem;
}

.doc-card:hover .doc-card-arrow {
  color: var(--accent);
  transform: translateX(3px);
}

.doc-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 3rem 1.5rem;
  border: 2px dashed var(--border);
  border-radius: 12px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.5);
}

.doc-empty-hint {
  margin-top: 0.5rem;
  font-size: 0.85rem;
}

.doc-empty code {
  padding: 0.15em 0.4em;
  border-radius: 4px;
  background: var(--code-bg);
  border: 1px solid var(--border);
  font-size: 0.85em;
}

.index-footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 1.5rem;
  color: var(--muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border);
}

@media (max-width: 640px) {
  .index-hero {
    padding: 2rem 1rem 1.5rem;
  }

  .index-main {
    padding: 1.25rem 1rem 2rem;
  }

  .doc-grid {
    grid-template-columns: 1fr;
  }
}