@charset "UTF-8";

:root {
  color-scheme: light;
  --paper: #f7f5ef;
  --soft: #ebe8df;
  --ink: #252823;
  --muted: #606359;
  --line: #d6d7cc;
  --accent: #805137;
  --serif: Georgia, "Songti SC", "Noto Serif CJK SC", SimSun, serif;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: #20231f;
  --soft: #2d332a;
  --ink: #eae9df;
  --muted: #b4b7aa;
  --line: #41463d;
  --accent: #e4b292;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    color-scheme: dark;
    --paper: #20231f;
    --soft: #2d332a;
    --ink: #eae9df;
    --muted: #b4b7aa;
    --line: #41463d;
    --accent: #e4b292;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-size: 16px; line-height: 1.8; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }
button { color: inherit; font: inherit; cursor: pointer; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 5px; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { text-wrap: balance; }
p { line-height: 1.85; }
img { display: block; max-width: 100%; height: auto; }
.skip-link { position: fixed; top: -5rem; left: 1rem; z-index: 10; padding: .6rem .9rem; background: var(--ink); color: var(--paper); }
.skip-link:focus { top: 1rem; }
.site-shell { max-width: 1168px; margin-inline: auto; padding: 0 48px; }

.site-header { display: flex; align-items: center; gap: 24px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.brand { margin-right: auto; font: 600 1.45rem/1.4 var(--serif); letter-spacing: -.025em; white-space: nowrap; }
.site-nav { display: flex; align-items: center; gap: 24px; }
.site-nav a { font-size: .9375rem; white-space: nowrap; }
.site-nav a[aria-current="page"] { text-decoration: underline; text-underline-offset: 7px; }
.github-nav { white-space: nowrap; font-size: .875rem; }
.github-nav, .github-link { display: inline-flex; align-items: center; gap: 7px; }
.github-nav::before, .github-link::before { content: ""; flex: none; width: 17px; height: 17px; background: currentColor; -webkit-mask: url("assets/github-mark.svg") center / contain no-repeat; mask: url("assets/github-mark.svg") center / contain no-repeat; }
.theme-toggle { padding: 8px 0 8px 16px; border: 0; border-left: 1px solid var(--line); background: transparent; font-size: .875rem; white-space: nowrap; }
.theme-toggle[hidden] { display: none; }
main { min-height: 65vh; padding-top: 32px; }
.eyebrow { margin-bottom: .5rem; color: var(--muted); font-size: .75rem; line-height: 1.8; letter-spacing: .12em; }

.compact-intro { display: flex; align-items: center; gap: 20px; padding: 0 0 22px; margin-bottom: 24px; border-bottom: 1px solid var(--line); }
.small-portrait, .about-avatar { flex: none; width: 88px; height: 88px; border-radius: 12px; background: #fff; object-fit: cover; }
.identity { flex: 1; min-width: 0; }
.identity h1 { margin: 4px 0 8px; font: 500 2.25rem/1.2 var(--serif); letter-spacing: -.035em; }
.identity-meta { margin: 0; color: var(--muted); font-size: .8125rem; line-height: 1.7; }
.intro-role { margin: 5px 0 0; font-size: .875rem; }
.contact-pill { display: inline-flex; align-items: center; gap: 9px; margin-left: 16px; padding: 10px 17px; border: 1px solid var(--line); border-radius: 24px; font-size: .875rem; white-space: nowrap; }
.contact-pill:hover { color: var(--ink); box-shadow: 0 3px 12px #0000000d; transform: translateY(-1px); }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }

.home-layout { display: grid; grid-template-columns: minmax(0, 1.618fr) minmax(0, 1fr); gap: 40px; }
.home-primary, .section-content, .home-rail { min-width: 0; }
.home-section { margin-bottom: 32px; }
.section-label { display: flex; align-items: baseline; gap: 12px; margin-bottom: 15px; }
.section-label h2 { margin: 0; font: 500 1.4rem/1.4 var(--serif); }
.intro-text { margin: 0 0 12px; font-size: 1rem; }
.inline-links { display: flex; gap: 24px; color: var(--muted); font-size: .8125rem; }
.inline-links a { padding: 4px 0; }
.home-rail { padding-left: 28px; border-left: 1px solid var(--line); }
.rail-block { padding-bottom: 24px; border-bottom: 1px solid var(--line); }
.rail-block h2 { margin: 9px 0 13px; font: 500 1.25rem/1.65 var(--serif); }
.rail-block p { margin: 12px 0; color: var(--muted); font-size: .875rem; }
.rail-block .rail-detail { margin-top: 26px; }
.rail-block a { display: inline-block; margin-top: 12px; color: var(--muted); font-size: .8125rem; }

.repo-row { display: grid; grid-template-columns: 22px minmax(0, 1fr) 16px; gap: 10px; padding: 17px 8px 17px 0; border-top: 1px solid var(--line); border-radius: 3px; }
.row-number { color: var(--muted); font-size: .75rem; font-variant-numeric: tabular-nums; line-height: 1.9; }
.repo-content, .repo-title, .repo-description, .repo-tech { display: block; }
.repo-title { display: flex; flex-wrap: wrap; align-items: baseline; gap: 5px 10px; }
.repo-title strong { font: 500 1.06rem/1.5 var(--serif); }
.repo-title small, .repo-tech { color: var(--muted); font-size: .75rem; }
.repo-description { margin: 7px 0; color: var(--muted); font-size: .875rem; line-height: 1.8; }
.row-arrow { color: var(--muted); font-size: .875rem; }
.repo-row:hover, .essay-row:hover { background: var(--soft); color: var(--ink); }
.more-link { display: flex; justify-content: space-between; padding: 13px 0; border-top: 1px solid var(--line); color: var(--muted); font-size: .8125rem; }
.essay-row { display: grid; grid-template-columns: minmax(0, 1fr) auto 16px; gap: 5px 12px; padding: 15px 8px 15px 0; border-top: 1px solid var(--line); border-radius: 3px; }
.essay-category { grid-column: 1 / -1; color: var(--muted); font-size: .6875rem; }
.essay-row strong { font: 500 1rem/1.65 var(--serif); }
.essay-time { color: var(--muted); font-size: .75rem; white-space: nowrap; line-height: 2; }

.page-intro { max-width: 850px; margin-bottom: 30px; }
.page-intro h1 { margin: 12px 0; font: 500 2.6rem/1.4 var(--serif); letter-spacing: -.03em; }
.page-intro > p:last-child { color: var(--muted); font-size: 1rem; }
.project-index { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 40px; }
.project-entry { min-width: 0; padding: 25px 0; border-top: 1px solid var(--line); }
.project-entry-head { display: flex; gap: 16px; }
.project-entry h2 { margin: 5px 0 14px; font: 500 1.45rem/1.5 var(--serif); }
.project-entry p { margin: 0 0 12px; color: var(--muted); font-size: .9375rem; }
.project-entry .project-boundary, .repo-status, .source-note { color: var(--muted); font-size: .8125rem; }
.source-note { margin-top: 24px; }
.filters { display: flex; gap: 8px; margin-bottom: 20px; }
.filters button { padding: 9px 14px; border: 1px solid var(--line); border-radius: 2px; background: transparent; font-size: .875rem; }
.filters button[aria-pressed="true"] { border-color: var(--ink); background: var(--ink); color: var(--paper); }
.result-count { color: var(--muted); font-size: .875rem; }
.post-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0 35px; }
.post-card { display: flex; flex-direction: column; padding: 26px 0 35px; border-top: 1px solid var(--line); }
.card-meta { display: flex; flex-direction: column; gap: 6px; margin-bottom: 20px; color: var(--muted); font-size: .875rem; }
.post-card h2 { margin-bottom: 14px; font: 500 1.4rem/1.6 var(--serif); }
.post-card p { color: var(--muted); font-size: .9375rem; }
.card-bottom { display: flex; justify-content: space-between; margin-top: auto; padding-top: 12px; color: var(--muted); font-size: .75rem; }
.article-page { max-width: 820px; margin-inline: auto; }
.article-intro { margin-bottom: 32px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.article-intro .article-meta { margin: 10px 0 0; color: var(--muted); font-size: .875rem; }
.article-body { max-width: 70ch; overflow-wrap: break-word; }
.article-body h2 { margin: 2.25em 0 .7em; font: 500 1.65rem/1.45 var(--serif); }
.article-body h3 { margin: 1.8em 0 .6em; font: 500 1.3rem/1.5 var(--serif); }
.article-body p, .article-body ul, .article-body ol, .article-body blockquote { margin: 0 0 1.4em; }
.article-body li + li { margin-top: .4em; }
.article-body a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.article-body blockquote { padding-left: 1.2em; border-left: 3px solid var(--line); color: var(--muted); }
.article-body pre { overflow-x: auto; padding: 16px; background: var(--soft); font-size: .875rem; line-height: 1.6; }
.article-body :not(pre) > code { padding: .1em .25em; background: var(--soft); }
.article-body img { margin: 1.7em auto; }
.article-body figcaption { margin-top: -.8em; color: var(--muted); font-size: .8125rem; text-align: center; }
.article-body hr { height: 0; margin: 2em 0; border: 0; border-top: 1px solid var(--line); }
.article-back { display: inline-block; margin-top: 28px; color: var(--muted); font-size: .875rem; }
.about-layout { display: grid; grid-template-columns: minmax(0, 1.618fr) minmax(0, 1fr); gap: 40px; }
.prose h2 { margin: 30px 0 18px; font: 500 1.6rem/1.6 var(--serif); }
.prose h2:first-child { margin-top: 0; }
.prose p { margin: 0 0 22px; font-size: 1.0625rem; line-height: 2.1; }
#contact { scroll-margin-top: 2rem; }
.profile-note { align-self: start; padding: 24px; background: var(--soft); }
.about-avatar { width: 112px; height: 112px; margin-bottom: 24px; }
.profile-note h2 { margin-bottom: 18px; font: 500 2rem/1.3 var(--serif); }
.profile-note dl { margin: 0; font-size: .875rem; }
.profile-note dt { margin-top: 18px; color: var(--muted); }
.profile-note dd { margin: 3px 0 0; }
.site-footer { display: flex; justify-content: space-between; gap: 20px; margin-top: 32px; padding: 25px 0 32px; border-top: 1px solid var(--line); color: var(--muted); font-size: .75rem; }

@media (max-width: 1050px) {
  .site-shell { padding: 0 28px; }
  .site-header { gap: 18px; }
  .home-layout { gap: 28px; }
  .home-rail { padding-left: 22px; }
}

@media (max-width: 850px) {
  .project-index { gap: 0 24px; }
  .post-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 700px) {
  .site-shell { padding: 0 20px; }
  .site-header { flex-wrap: wrap; gap: 10px 14px; padding: 14px 0; }
  .brand { font-size: 1.25rem; }
  .site-nav { order: 3; width: 100%; justify-content: space-between; gap: 12px; }
  .site-nav a, .github-nav, .theme-toggle { font-size: .8125rem; }
  .theme-toggle { padding-left: 12px; }
  main { padding-top: 24px; }
  .compact-intro { display: grid; grid-template-columns: 64px minmax(0, 1fr); gap: 12px 16px; margin-bottom: 24px; }
  .small-portrait { width: 64px; height: 64px; }
  .identity h1 { margin: 4px 0; font-size: 1.8rem; }
  .identity .eyebrow { font-size: .625rem; }
  .identity-meta { font-size: .75rem; }
  .intro-role { font-size: .8125rem; }
  .contact-pill { grid-column: 2; justify-self: start; margin: 0; padding: 9px 12px; }
  .home-layout { display: block; }
  .home-rail { padding: 24px 0 0; border-left: 0; border-top: 1px solid var(--line); }
  .home-section { margin-bottom: 28px; }
  .section-label h2 { font-size: 1.25rem; }
  .essay-row { grid-template-columns: minmax(0, 1fr) 16px; }
  .essay-time { display: none; }
  .page-intro h1 { font-size: 2rem; }
  .page-intro .project-title { font-size: clamp(1.625rem, 8.5vw, 2rem); text-wrap: wrap; }
  .project-title span { display: block; }
  .project-index, .post-grid { grid-template-columns: 1fr; }
  .card-meta { flex-direction: row; justify-content: space-between; }
  .about-layout { display: block; }
  .about-layout .profile-note { margin-top: 30px; }
  .prose p { font-size: 1rem; }
  .site-footer { flex-direction: column; gap: 6px; margin-top: 50px; }
}

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

/* Long project articles share the existing reading layout. */
.project-toc { margin: 0 0 1.7em; padding: 14px 18px; border: 1px solid var(--line); border-radius: 3px; font-size: .875rem; }
.project-toc summary { cursor: pointer; }
.project-toc nav { margin-top: 14px; }
.project-toc ul { padding-left: 1.4em; }
.project-toc nav > ul { margin-bottom: 0; }

.software-list { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }
.software-list li { padding: 5px 12px; border: 1px solid var(--line); border-radius: 3px; font-size: .875rem; line-height: 1.8; }

.article-body img { max-height: 780px; width: auto; }
.article-body table { display: block; max-width: 100%; overflow-x: auto; margin: 0 0 1.4em; border-collapse: collapse; font-size: .9375rem; }
.article-body th, .article-body td { padding: 10px 14px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.article-body th { background: var(--soft); }