:root {
  color-scheme: light dark;
  --background: light-dark(#f4f0e8, #242722);
  --text: light-dark(#292b26, #e4e7de);
  --accent: light-dark(#44613b, #a9c493);
  --muted: light-dark(#62665b, #b2b9a9);
  --surface: light-dark(#eae6dc, #30362d);
  --border: light-dark(#d3d1c4, #485041);
  font: 100%/1.75 system-ui, sans-serif;
  background: var(--background);
  color: var(--text);
  scroll-behavior: smooth;
}

html[data-theme="light"] { color-scheme: light; }
html[data-theme="dark"] { color-scheme: dark; }
* { box-sizing: border-box; }
body { margin: 0; }

/* Override the search component's defaults using the same site palette. */
html:root {
  --pf-text: var(--text);
  --pf-text-secondary: var(--muted);
  --pf-text-muted: var(--muted);
  --pf-background: var(--background);
  --pf-border: var(--border);
  --pf-border-focus: var(--accent);
  --pf-outline-focus: var(--accent);
  --pf-hover: var(--surface);
  --pf-skeleton: var(--surface);
  --pf-skeleton-shine: var(--background);
  --pf-mark: var(--accent);
  --pf-font: system-ui, sans-serif;
}

/* The search UI resets inherited properties, including color-scheme. */
pagefind-modal, pagefind-modal-trigger,
pagefind-modal *, pagefind-modal-trigger * { color-scheme: inherit !important; }

a { color: var(--accent); text-underline-offset: 0.2em; }
a:hover { text-decoration-thickness: 2px; }
button { font: inherit; cursor: pointer; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
[id] { scroll-margin-top: 5rem; }

h1, h2, h3, h4, h5, h6 {
  font-family: Georgia, "Noto Serif TC", serif;
  line-height: 1.35;
  margin: 2rem 0 1rem;
  overflow-wrap: anywhere;
}
h1 { font-size: 2rem; margin-top: 0; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }
h5, h6 { font-size: 1rem; }
p, ul, ol, dl { margin: 0 0 1.25rem; }
ul, ol { padding-left: 1.5rem; }
li > p:last-child { margin-bottom: 0; }
img, svg, video { max-width: 100%; height: auto; }
figure { margin: 2rem 0; text-align: center; }
figcaption { color: var(--muted); font-size: 0.875rem; }
blockquote, .callout {
  margin: 1.5rem 0;
  padding: 0.75rem 1rem;
  border-left: 3px solid var(--accent);
  background: var(--surface);
}
blockquote > :last-child, .callout-body > :last-child { margin-bottom: 0; }
table { display: block; max-width: 100%; overflow: auto; border-collapse: collapse; }
td, th { padding: 0.5rem 0.75rem; border-bottom: 1px solid var(--border); }
math[display="block"] { margin-block: 1.5rem; overflow-x: auto; }
sup { line-height: 0; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--border);
  background: var(--background);
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 3.5rem;
  max-width: 58rem;
  margin: auto;
  padding: 0.5rem 1rem;
  position: relative;
}
.site-brand { margin-right: auto; font-family: Georgia, serif; font-weight: 700; }
.site-nav a { text-decoration: none; }
.site-menu { display: flex; align-items: center; gap: 1.25rem; }
.site-menu a.active { text-decoration: underline; }
.theme-toggle, .menu-toggle {
  min-width: 2.75rem;
  min-height: 2.75rem;
  padding: 0.25rem;
  border: 0;
  background: transparent;
  color: var(--accent);
}
.theme-toggle { font-size: 0.875rem; }
.menu-toggle { display: none; }

.page, .landing {
  width: min(100% - 2rem, 39rem);
  margin: 0 auto;
  padding: 3rem 0;
}
.content { min-width: 0; overflow-wrap: anywhere; }
.content > :first-child { margin-top: 0; }
.toc { display: none; }
.toc-title { margin-bottom: 0.75rem; font-weight: 600; }
.toc ul { padding: 0; list-style: none; }
.toc a { display: block; padding: 0.25rem 0.5rem; text-decoration: none; }
.toc a.active { background: var(--surface); }
.toc .level-2 a { padding-left: 1rem; }
.toc .level-3 a { padding-left: 1.5rem; }

code { font-family: ui-monospace, monospace; font-size: 0.875em; }
:not(pre) > code { padding: 0.15rem 0.3rem; background: var(--surface); }
.code-block { position: relative; }
pre { padding: 1.5rem 1rem 1rem; overflow: auto; background: var(--surface); }
pre code { white-space: pre; }
html[data-theme="dark"] pre code { filter: brightness(1.8); }
.copy-code {
  position: absolute;
  top: 0.25rem;
  right: 0.25rem;
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--border);
  background: var(--background);
  color: var(--accent);
  font-size: 0.75rem;
}
.diagram svg { display: block; width: 100%; }

.post-list { list-style: none; padding: 0; }
.post-list li {
  display: grid;
  grid-template-columns: 7rem 1fr;
  gap: 1rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}
.post-list a { text-decoration: none; }
.post-list time, .post-meta time { color: var(--muted); font-size: 0.875rem; }
.post-meta, .post-tags, .tag-cloud {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.post-meta { margin-bottom: 2rem; }
.tag-cloud { margin-bottom: 1.5rem; }
.tag-chip {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 0.25rem;
  font-size: 0.8125rem;
}
.post-tags a, .tag-cloud a { text-decoration: none; }
.tag-results { display: none; }
.tag-results:target { display: block; }

.page-nav, .site-footer { width: min(100% - 2rem, 58rem); margin: 0 auto 2rem; }
.page-nav-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.page-nav-link { display: flex; align-items: center; gap: 0.75rem; text-decoration: none; }
.page-nav-link--next { justify-content: flex-end; text-align: right; }
.page-nav-content { display: grid; min-width: 0; }
.page-nav-kind { color: var(--muted); font-size: 0.75rem; }
.page-nav-title { overflow-wrap: anywhere; }
body:has(.post-list) > .page-nav { display: none; }
.site-footer { border-top: 1px solid var(--border); padding-top: 1rem; color: var(--muted); }
.site-footer-links { list-style: none; padding: 0; margin: 0; text-align: center; font-size: 0.875rem; }

@media (min-width: 64rem) {
  .page.has-toc { width: min(100% - 2rem, 58rem); display: grid; grid-template-columns: 39rem 16rem; gap: 3rem; }
  .toc { display: block; grid-column: 2; grid-row: 1; position: sticky; top: 5rem; align-self: start; max-height: calc(100vh - 6rem); overflow-y: auto; font-size: 0.875rem; }
  .page .content { grid-column: 1; grid-row: 1; }
}

@media (max-width: 48rem) {
  .menu-toggle { display: block; }
  .site-menu { display: none; position: absolute; right: 1rem; top: 100%; padding: 1rem; border: 1px solid var(--border); background: var(--background); }
  .site-menu.is-open { display: grid; }
  .page, .landing { padding-block: 2rem; }
  h1 { font-size: 1.75rem; }
}

@media (max-width: 36rem) {
  .post-list li { grid-template-columns: 1fr; gap: 0.125rem; }
  .page-nav-inner { grid-template-columns: 1fr; }
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme]) pre code { filter: brightness(1.8); }
}

@media (prefers-reduced-motion: reduce) {
  :root { scroll-behavior: auto; }
}