:root {
  --blog-canvas: #f1efe9;
  --blog-surface: #f7f5ef;
  --blog-raised: #fbfaf6;
  --blog-ink: #2f3330;
  --blog-muted: #686e68;
  --blog-border: #d8d6ce;
  --blog-accent: #5f7267;
  --blog-accent-hover: #4b5f53;
  --blog-soft-accent: #e4e9e4;
}

html[data-theme='dark'] {
  --blog-canvas: #242925;
  --blog-surface: #2c322e;
  --blog-raised: #343a35;
  --blog-ink: #e4e1d8;
  --blog-muted: #aaa99e;
  --blog-border: #4b514a;
  --blog-accent: #a4afa0;
  --blog-accent-hover: #bdc5b9;
  --blog-soft-accent: #3a423c;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scrollbar-width: none; }
html::-webkit-scrollbar { display: none; }
body {
  margin: 0;
  background: var(--blog-canvas);
  color: var(--blog-ink);
  font: 16px/1.7 Inter, 'Noto Sans SC', system-ui, sans-serif;
}

a { color: inherit; text-underline-offset: 4px; }
a:hover { color: var(--blog-accent); }
body .site-header__brand { color: var(--blog-ink); }
body .site-header__brand:hover, body .site-nav__link:hover { color: var(--blog-accent-hover); }
button, input { font: inherit; }
:focus-visible { outline: 2px solid var(--blog-accent); outline-offset: 4px; }

/* Core owns the shared header geometry and theme switcher. */
.site-header { padding: 0; }

main {
  width: min(100% - 48px, 1120px);
  min-height: 70vh;
  margin: 0 auto;
  padding: 72px 0 96px;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: Georgia, 'Noto Serif SC', 'Noto Serif CJK SC', 'Source Han Serif SC', 'Songti SC', serif;
  font-weight: 400;
  line-height: 1.25;
  overflow-wrap: anywhere;
}
h1 { font-size: 3.5rem; letter-spacing: 0; }
h2 { font-size: 2rem; }

.list-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--blog-border);
}
.eyebrow {
  margin: 0 0 16px;
  color: var(--blog-muted);
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .12em;
}
.list-intro {
  max-width: 38rem;
  margin: 20px 0 0;
  color: var(--blog-muted);
  font-size: 1.05rem;
}
.actions, .tags { display: flex; flex-wrap: wrap; gap: 8px; }
.actions { justify-content: flex-end; flex-shrink: 0; }
.button {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--blog-border);
  border-radius: 3px;
  padding: 8px 14px;
  background: var(--blog-surface);
  color: var(--blog-ink);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}
.button:hover { border-color: var(--blog-accent); color: var(--blog-ink); }
.actions .button:last-child { border-color: var(--blog-accent); background: var(--blog-accent); color: var(--blog-raised); }

.actions { flex-wrap: nowrap; align-items: center; }
.search { flex: 1 1 260px; width: auto; min-width: 220px; margin: 0; }
.search__controls { display: flex; align-items: stretch; gap: 10px; }
input {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--blog-border);
  border-radius: 3px;
  padding: 9px 12px;
  background: var(--blog-raised);
  color: var(--blog-ink);
}
.button--search { flex: 0 0 76px; width: 76px; }

.post-list { width: 100%; }
.post-entry {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 28px;
  padding: 30px 0;
  border-bottom: 1px solid var(--blog-border);
}
.post-entry__meta { padding-top: 7px; color: var(--blog-muted); font-size: .875rem; }
.post-entry__body h2 { margin: 0; }
.post-entry h2 a { text-decoration: none; }
.summary { width: 100%; margin: 12px 0 16px; color: var(--blog-muted); }
.pin { display: inline-block; margin-left: 8px; color: var(--blog-accent); }
.tag {
  border: 1px solid var(--blog-border);
  border-radius: 3px;
  padding: 2px 8px;
  color: var(--blog-muted);
  font-size: .8rem;
}
.empty { padding: 56px 0; color: var(--blog-muted); }
.pagination { display: grid; grid-template-columns: minmax(84px, auto) 1fr minmax(84px, auto); align-items: center; gap: 20px; margin: 36px 0 0; padding: 16px 0; border-top: 1px solid var(--blog-border); border-bottom: 1px solid var(--blog-border); }
.pagination > .button { min-width: 84px; }
.pagination__center { display: flex; align-items: center; justify-content: center; gap: 18px; min-width: 0; color: var(--blog-muted); }
.pagination__center > span { min-width: 3.5rem; color: var(--blog-ink); font-variant-numeric: tabular-nums; text-align: center; }
.pagination__jump { display: flex; align-items: center; gap: 8px; margin: 0; }
.pagination__jump label { color: var(--blog-muted); font-size: .875rem; }
.pagination__jump input { width: 4.25rem; padding: 8px; text-align: center; }
.pagination__jump .button { min-width: 56px; padding-inline: 10px; }
.pagination__disabled { cursor: not-allowed; opacity: .45; }

.back { display: inline-flex; align-items: center; margin-bottom: 32px; border: 1px solid var(--blog-border); border-radius: 3px; padding: 8px 14px; color: var(--blog-muted); font-size: .875rem; text-decoration: none; }
.back:hover { border-color: var(--blog-accent); color: var(--blog-ink); }
.article-heading { max-width: 800px; margin-bottom: 56px; }
.post-meta { display: flex; gap: 12px; margin-bottom: 16px; color: var(--blog-muted); font-size: .875rem; }
.article-heading h1 { margin-bottom: 20px; }
.intro { max-width: 680px; margin: 0 0 24px; border-left: 3px solid var(--blog-accent); padding: 12px 0 12px 16px; color: var(--blog-muted); font-size: 1.15rem; }
.reading-layout { display: grid; grid-template-columns: minmax(0, 760px) minmax(160px, 220px); gap: 48px; }
.reading-layout--full { grid-template-columns: minmax(0, 1fr); }
.prose { min-width: 0; overflow-wrap: anywhere; }
.prose :is(h1, h2, h3, h4, h5, h6) { scroll-margin-top: 104px; }
.prose :is(h1, h2, h3) { margin: 2.2em 0 .7em; }
.prose p, .prose ul, .prose ol, .prose blockquote, .prose table { margin: 1.15em 0; }
.prose img { max-width: 100%; height: auto; border-radius: 7px; }
.prose pre { max-width: 100%; overflow: auto; border: 1px solid var(--blog-border); border-radius: 7px; padding: 16px; background: var(--blog-surface); }
.prose code { font-size: .875em; }
.prose blockquote { margin-left: 0; padding: 0 20px; border-left: 3px solid var(--blog-accent); color: var(--blog-muted); }
.prose table { display: block; max-width: 100%; overflow: auto; border-collapse: collapse; }
.prose th, .prose td { border: 1px solid var(--blog-border); padding: 8px 12px; }
.prose math[display='block'] { display: block; max-width: 100%; overflow-x: auto; padding: 16px 0; }
.outline { position: sticky; top: 104px; align-self: start; max-height: calc(100vh - 144px); overflow: auto; padding-left: 20px; border-left: 1px solid var(--blog-border); font-size: .875rem; scrollbar-width: none; }
.outline::-webkit-scrollbar { display: none; }
.outline h2 { margin: 0 0 12px; color: var(--blog-ink); font: 600 .875rem/1.4 Inter, 'Noto Sans SC', system-ui, sans-serif; }
.outline-link { display: block; padding: 5px 0 5px calc(max(0px, (var(--level) - 2) * 10px)); color: var(--blog-muted); text-decoration: none; overflow-wrap: anywhere; }
.outline-link[aria-current='true'] { color: var(--blog-accent); font-weight: 600; }

footer { border-top: 1px solid var(--blog-border); padding: 24px; color: var(--blog-muted); font-size: .875rem; text-align: center; }
.highlight .k, .highlight .kn { color: var(--blog-accent); font-weight: 600; }
.highlight .s, .highlight .s1, .highlight .s2 { color: var(--blog-muted); }

@media (max-width: 800px) {
  main { width: min(100% - 32px, 680px); padding: 48px 0 64px; }
  h1 { font-size: 2.25rem; }
  h2 { font-size: 1.45rem; }
  .list-heading { align-items: stretch; flex-direction: column; gap: 20px; }
  .actions { justify-content: flex-start; flex-wrap: wrap; }
  .result-count { padding-bottom: 0; }
  .post-entry { grid-template-columns: 1fr; gap: 8px; padding: 24px 0; }
  .post-entry__meta { padding-top: 0; }
  .reading-layout { display: flex; flex-direction: column; gap: 28px; }
  .pagination { grid-template-columns: minmax(72px, auto) 1fr minmax(72px, auto); gap: 10px; padding: 12px 0; }
  .pagination__center { flex-direction: column; gap: 10px; }
  .outline { order: -1; position: static; max-height: 40vh; padding: 12px; border: 1px solid var(--blog-border); border-radius: 7px; }
  .outline nav { overflow: auto; scrollbar-width: none; }
  .outline nav::-webkit-scrollbar { display: none; }
}

@media (max-width: 420px) {
  .search__controls { gap: 8px; }
  .button--search { flex-basis: 68px; width: 68px; padding-inline: 8px; }
}

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