/* Chen Peng: a quiet, editorial layer over Stellar 2.0.
   Tokens → native shell → type → content components → responsive rules. */
:root {
  --chen-bg:#f7f8f4; --chen-paper:#fdfefb; --chen-ink:#25342f;
  --chen-body:#42514a; --chen-muted:#67766e; --chen-line:#dbe2da;
  --chen-accent:#256d5c; --chen-tint:#eaf1e9; --chen-soft:#f0f3ed;
  --chen-code:#1e2d28; --chen-code-ink:#e3eee7; --chen-serif:Georgia,'Times New Roman',serif;
  --background:var(--chen-bg); --card:var(--chen-paper); --text:var(--chen-ink);
  --text-p0:var(--chen-ink); --text-p1:var(--chen-body); --text-p2:var(--chen-muted);
  --text-p3:var(--chen-muted); --text-p4:var(--chen-muted); --text-code:var(--chen-ink);
  --theme:var(--chen-accent); --link:var(--chen-accent); --block:var(--chen-soft);
  --block-border:var(--chen-line); --theme-block:var(--chen-tint);
  --theme-border:var(--chen-line); --text-meta:var(--chen-line);
  --width-main-article:800px; --width-main:800px; --side-content-width:190px;
  --ui-item-title:var(--chen-ink); --ui-item-muted:var(--chen-muted);
}
:root[data-theme='dark'] {
  --chen-bg:#18201d; --chen-paper:#1e2924; --chen-ink:#e3eae2;
  --chen-body:#c2cfc5; --chen-muted:#a1b2a6; --chen-line:#38473e;
  --chen-accent:#9dcdb4; --chen-tint:#293c31; --chen-soft:#243128;
  --chen-code:#111b16; --chen-code-ink:#e0ede4;
}
@media(prefers-color-scheme:dark) {
  :root:not([data-theme]) {
    --chen-bg:#18201d; --chen-paper:#1e2924; --chen-ink:#e3eae2;
    --chen-body:#c2cfc5; --chen-muted:#a1b2a6; --chen-line:#38473e;
    --chen-accent:#9dcdb4; --chen-tint:#293c31; --chen-soft:#243128;
    --chen-code:#111b16; --chen-code-ink:#e0ede4;
  }
}
html { scroll-behavior:smooth; scroll-padding-top:36px; }
body { background:var(--chen-bg); color:var(--chen-ink); font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif; -webkit-font-smoothing:antialiased; }
::selection { background:#cae1d0; color:#183c2b; }
* { -webkit-tap-highlight-color:transparent; }
a { color:var(--chen-accent); text-underline-offset:4px; }
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible { outline:2px solid var(--chen-accent)!important; outline-offset:5px; }
a,button { touch-action:manipulation; }
button { font:inherit; }
img { max-width:100%; }

/* The native Stellar shell still owns drawers, panel state and search. */
.site-main { padding:38px 18px 24px; }
.site-region--leftbar .site-region__surface { box-shadow:none!important; border-radius:0; border:0; background:transparent!important; }
.site-region__decoration { display:none; }
.site-region--leftbar .site-region__viewport { padding:0 10px; }
.site-region--leftbar .site-region__header { padding:0!important; }
.site-region--leftbar .brand-header { margin:0; padding:26px 10px 20px; }
.brand-header .brand-wrap { display:flex; flex-direction:column; align-items:flex-start; gap:14px; margin:0; }
.site-region--leftbar .brand-image { width:56px; height:56px; border-radius:18px; overflow:hidden; margin:0; }
.site-region--leftbar .brand-image img { width:56px; height:56px; border-radius:18px; object-fit:cover; }
.brand-title { text-align:left!important; max-width:100%; }
.brand-name { font-size:23px!important; font-weight:650!important; letter-spacing:-.8px; color:var(--chen-ink); }
.brand-tagline { margin-top:5px; font-size:12px!important; line-height:1.6!important; color:var(--chen-muted); white-space:normal!important; text-overflow:clip!important; overflow:visible!important; }
.brand-search { margin-top:24px; }
.brand-search .search-trigger { border:1px solid var(--chen-line)!important; border-radius:8px!important; padding:10px 12px!important; background:transparent!important; font-size:13px; color:var(--chen-muted); min-height:42px; box-shadow:none!important; }
.brand-search .search-trigger:hover { background:var(--chen-tint)!important; }
.site-region--leftbar .site-region__body { padding:6px 0!important; }
.site-region--leftbar .widget-instance--menu { margin:0!important; padding:0 2px; }
.site-region--leftbar .ui-collection__item { box-shadow:none!important; }
.site-region--leftbar .widget-instance--menu a { min-height:43px; margin:2px 0; padding:9px 12px!important; border-radius:8px!important; font-size:14px; color:var(--chen-muted); background:transparent; }
.site-region--leftbar .widget-instance--menu a.active { color:var(--chen-accent)!important; background:var(--chen-tint)!important; font-weight:600; }
.site-region--leftbar .widget-instance--menu a:hover { color:var(--chen-ink); background:var(--chen-soft)!important; }
.site-region--leftbar .widget-instance--menu a.active:after { display:none; }
.site-region--leftbar .ui-icon { color:inherit!important; }
.site-region--leftbar .widget-instance--menu .ui-icon { width:18px; height:18px; margin-right:4px; }
.site-region--leftbar svg { stroke-width:1.65; }
.site-region--leftbar .widget-wrapper.markdown { margin:20px 10px 0; padding:20px 0!important; border-top:1px solid var(--chen-line); }
.site-region--leftbar .widget-wrapper.markdown .widget-body { background:none!important; border:0!important; padding:0!important; }
.rail-label { display:block; color:var(--chen-muted); font-size:10px; letter-spacing:.13em; font-weight:650; margin-bottom:12px; }
.rail-links { display:flex; flex-direction:column; gap:12px; }
.rail-links a { font-size:13px; color:var(--chen-muted); text-decoration:none; }
.rail-links a:hover { color:var(--chen-accent); }
.rail-note { font-size:12px; line-height:1.8; color:var(--chen-muted); margin:0; }
.site-region--leftbar .site-region__footer { padding:16px 10px; }
.site-region__footer-actions .social-wrap { justify-content:flex-start; gap:8px; }
.site-region__footer-actions .social { width:36px; height:36px; border-radius:8px; color:var(--chen-muted); }
.site-region__system { border-top:1px solid var(--chen-line); margin-top:12px; padding-top:12px; }
.site-region__settings .settings-widget__name { font-size:12px; }
.settings-widget__avatar { width:18px!important; height:18px!important; }
.site-main > .mobile-only { display:none!important; }

/* Headers and typography. No empty cover slots. */
.section-header { border-bottom:1px solid var(--chen-line); padding:4px 0 32px; margin:0 0 32px; }
.overline,.hero-kicker { font-size:10px; line-height:1.6; letter-spacing:.14em; font-weight:650; color:var(--chen-accent); text-transform:uppercase; }
.overline { display:block; }
.section-header h1 { font-family:var(--chen-serif); font-size:clamp(32px,3.2vw,46px); font-weight:400; letter-spacing:-1.6px; line-height:1.16; margin:12px 0 0; color:var(--chen-ink); text-wrap:balance; }
.section-header p { max-width:64ch; font-size:16px; line-height:1.8; margin:17px 0 0; color:var(--chen-muted); text-wrap:pretty; }
.section-header .back-link { display:inline-block; margin:0 0 26px; color:var(--chen-muted); font-size:12px; text-decoration:none; }
.section-header .back-link:hover { color:var(--chen-accent); }
.article-meta { display:flex; flex-wrap:wrap; align-items:center; gap:9px; font-size:12px; color:var(--chen-muted); margin-top:20px; }
.meta-separator { opacity:.6; }
.md-text { --fs-content:17px; color:var(--chen-body); font-size:17px; line-height:1.85; }
.site-main .md-text.content { padding:0!important; margin:0; }
.md-text p { line-height:1.85; margin:0 0 1.35em; }
.md-text strong { color:var(--chen-ink); font-weight:600; }
.md-text h2,.md-text h3,.md-text h4 { color:var(--chen-ink); background:transparent!important; padding:0; border:0; text-wrap:balance; }
.md-text h2 { font:400 29px/1.3 var(--chen-serif); letter-spacing:-.65px; margin:2.2em 0 .85em; }
.md-text h3 { font-size:19px; font-weight:600; line-height:1.45; margin:1.9em 0 .8em; }
.md-text h2:before,.md-text h3:before,.md-text h4:before { display:none!important; }
.md-text .headerlink { position:absolute; opacity:0; width:auto; padding:0; margin-left:-22px; text-decoration:none; background:none!important; }
.md-text :is(h2,h3,h4):hover .headerlink,.md-text .headerlink:focus-visible { opacity:.6; }
.md-text a:not([class]),.md-text p a:not([class]) { color:var(--chen-accent); font-weight:inherit; background:none!important; text-decoration:underline; text-decoration-color:color-mix(in srgb,var(--chen-accent) 40%,transparent); text-decoration-thickness:1px; }
.md-text a:not([class]):before { display:none!important; }
.md-text a:hover { text-decoration-color:currentColor; }
.md-text blockquote { border-left:2px solid var(--chen-accent); background:var(--chen-tint); padding:18px 24px; border-radius:0 8px 8px 0; color:var(--chen-body); }
.md-text hr { background:var(--chen-line); height:1px; margin:36px 0; }
.md-text ul,.md-text ol { padding-left:1.4em; margin:1em 0 1.6em; }
.md-text li { margin:.45em 0; line-height:1.8; }
.md-text img { border-radius:10px; }
.md-text :not(pre)>code { background:var(--chen-tint); border:0; color:var(--chen-accent); border-radius:4px; padding:.15em .35em; font-size:.86em; }
.md-text .highlight { border:1px solid var(--chen-line); border-radius:10px!important; margin:24px 0; overflow:hidden; background:var(--chen-code)!important; }
.md-text .highlight .code { background:var(--chen-code)!important; }
.md-text .highlight pre { font-size:13px; line-height:1.8; color:var(--chen-code-ink); background:transparent; padding:18px 20px; tab-size:4; }
.md-text .highlight .code pre { padding:18px 20px; }
.md-text .highlight figcaption { color:#afc5b7; background:var(--chen-code); border-bottom:1px solid #405247; font-size:11px; padding:11px 18px; }
.md-text table:not(.highlight table) { width:100%; border:1px solid var(--chen-line); border-radius:8px; font-size:14px; }
.md-text th { background:var(--chen-tint); color:var(--chen-ink); font-weight:600; }
.md-text td,.md-text th { border-color:var(--chen-line); padding:12px 16px; }
.md-text tr { background:transparent; }
.md-text tr:nth-child(even) { background:var(--chen-soft); }
.katex-display { overflow-x:auto; overflow-y:hidden; border-radius:8px; background:var(--chen-soft); padding:20px 16px; margin:24px 0; color:var(--chen-ink); }
.katex { font-size:1.06em; }
.widget-wrapper.toc .toc a { opacity:1!important; color:var(--chen-muted); font-size:12px; line-height:1.6; padding:7px 10px; }
.widget-wrapper.toc .toc .toc-text { white-space:normal!important; overflow:visible!important; }
.widget-wrapper.toc .toc a.active,.widget-wrapper.toc .toc a:hover { color:var(--chen-accent); background:var(--chen-tint); }
.site-region--rightbar .widget-wrapper.toc { padding-top:40px!important; }
.widget-wrapper.toc .widget-header { color:var(--chen-muted); text-transform:uppercase; font-size:10px; letter-spacing:.1em; }
.widget-wrapper.toc .toc:before { width:1px!important; background:var(--chen-line)!important; }

/* Home: identity, writing and selected work. */
.home-hero { padding:20px 0 34px; border-bottom:1px solid var(--chen-line); }
.hero-kicker { display:flex; gap:9px; align-items:center; letter-spacing:.11em; font-size:10px; }
.status-dot { display:inline-block; width:6px; height:6px; border-radius:50%; background:var(--chen-accent); flex-shrink:0; }
.home-hero h1 { font:400 clamp(42px,4.6vw,64px)/1.1 var(--chen-serif); letter-spacing:-2.8px; margin:28px 0 15px; color:var(--chen-ink); text-wrap:balance; }
.title-period { color:var(--chen-accent); }
.hero-role { font-size:16px; line-height:1.6; margin:0; color:var(--chen-ink); }
.hero-role span { color:var(--chen-muted); }
.hero-description { max-width:57ch; font-size:17px; line-height:1.85; color:var(--chen-muted); margin:20px 0 0; }
.hero-actions { display:flex; align-items:center; flex-wrap:wrap; gap:24px; margin:26px 0; }
.button-primary,.button-text { display:inline-flex; justify-content:center; align-items:center; gap:22px; font-size:13px; line-height:1.5; font-weight:550; text-decoration:none!important; cursor:pointer; border:0; }
.button-primary { padding:13px 19px; min-height:44px; box-sizing:border-box; border-radius:7px; color:var(--chen-paper)!important; background:var(--chen-accent); transition:transform .18s,box-shadow .18s; }
.button-primary:hover { transform:translateY(-1px); box-shadow:0 4px 10px #183c2b16; }
.button-text { color:var(--chen-accent); background:transparent; padding:10px 0; }
.hero-footnote { display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px; padding-top:9px; font-size:11px; color:var(--chen-muted); line-height:1.6; }
.hero-footnote a { color:inherit; text-decoration:none; }
.home-section { margin-top:40px; }
.section-heading { display:flex; justify-content:space-between; align-items:flex-end; gap:16px; margin-bottom:18px; }
.section-heading h2 { font:400 30px/1.2 var(--chen-serif); letter-spacing:-.8px; margin:7px 0 0; }
.section-link { font-size:12px; font-weight:500; white-space:nowrap; text-decoration:none; color:var(--chen-muted); padding:6px 0; }
.section-link:hover { color:var(--chen-accent); }
.writing-list { border-top:1px solid var(--chen-line); }
.writing-entry { display:grid; grid-template-columns:68px 1fr 18px; gap:22px; padding:25px 2px; border-bottom:1px solid var(--chen-line); color:var(--chen-ink)!important; text-decoration:none!important; transition:background .18s; }
.writing-entry:hover { background:var(--chen-soft); }
.entry-date { font-size:11px; line-height:1.6; color:var(--chen-muted); padding-top:1px; font-variant-numeric:tabular-nums; }
.entry-date time>span { display:block; }
.entry-date time>span:first-child { color:var(--chen-body); font-size:12px; }
.entry-category { color:var(--chen-accent); font-size:9px; letter-spacing:.12em; font-weight:650; margin-bottom:7px; }
.entry-copy h3 { color:var(--chen-ink); font-size:20px; font-weight:550; letter-spacing:-.4px; line-height:1.35; margin:0 0 9px; text-wrap:pretty; }
.entry-copy p { margin:0; font-size:13px; line-height:1.7; max-width:68ch; color:var(--chen-muted); }
.entry-arrow { font-size:19px; color:var(--chen-muted); align-self:center; transition:transform .18s,color .18s; }
.writing-entry:hover .entry-arrow { transform:translate(2px,-2px); color:var(--chen-accent); }
.work-row { display:grid; grid-template-columns:28px 1fr 100px 18px; align-items:center; gap:18px; padding:21px 2px; border-top:1px solid var(--chen-line); color:var(--chen-ink); text-decoration:none; }
.work-index { font-size:11px; color:var(--chen-muted); font-variant-numeric:tabular-nums; }
.work-row h3 { font-size:17px; font-weight:550; letter-spacing:-.3px; margin:0 0 6px; }
.work-row p { font-size:12px; line-height:1.65; margin:0; color:var(--chen-muted); }
.work-kind { font-size:10px; color:var(--chen-muted); text-align:right; }
.work-arrow { color:var(--chen-accent); }
.work-row:hover h3 { color:var(--chen-accent); }
.series-callout { display:flex; align-items:center; gap:22px; border:1px solid var(--chen-line); padding:24px; border-radius:9px; margin-top:38px; background:var(--chen-tint); }
.series-mark { font:44px/1 var(--chen-serif); color:var(--chen-accent); }
.series-callout>div { flex:1; }
.series-callout h2 { font-size:17px; font-weight:550; margin:7px 0; letter-spacing:-.3px; }
.series-callout p { font-size:12px; line-height:1.7; color:var(--chen-muted); margin:0; }
.series-callout .button-text { font-size:11px; gap:10px; white-space:nowrap; }

/* Content indexes. */
.browse-nav { display:flex; gap:26px; border-bottom:1px solid var(--chen-line); margin-bottom:30px; overflow-x:auto; scrollbar-width:thin; }
.browse-nav a { padding:0 1px 13px; font-size:12px; color:var(--chen-muted); text-decoration:none; white-space:nowrap; }
.browse-nav a[aria-current] { color:var(--chen-accent); border-bottom:2px solid var(--chen-accent); font-weight:600; }
.collection-meta { display:flex; justify-content:space-between; color:var(--chen-muted); font-size:11px; margin:10px 0 20px; }
.topic-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:18px; }
.topic-tile { position:relative; border:1px solid var(--chen-line); border-radius:10px; padding:26px; text-decoration:none; color:var(--chen-ink); background:var(--chen-paper); }
.topic-symbol { color:var(--chen-accent); font:italic 34px/1 var(--chen-serif); }
.topic-tile h2 { font-size:20px; font-weight:500; letter-spacing:-.5px; margin:22px 0 10px; }
.topic-tile p { color:var(--chen-muted); font-size:12px; margin:0; }
.tile-arrow { position:absolute; right:24px; top:24px; color:var(--chen-muted); }
.topic-tile:hover { border-color:var(--chen-accent); }
.archive-year { margin:0 0 40px; }
.archive-year-title { display:flex; justify-content:space-between; align-items:center; margin:0 0 12px; }
.archive-year-title h2 { font:400 34px/1.3 var(--chen-serif); margin:0; }
.archive-year-title>span { color:var(--chen-muted); font-size:11px; }
.archive-row { display:grid; grid-template-columns:70px 1fr 16px; gap:16px; align-items:center; border-top:1px solid var(--chen-line); padding:20px 0; color:var(--chen-ink); text-decoration:none; font-size:15px; }
.archive-row time { color:var(--chen-muted); font-size:12px; }
.archive-row:hover { color:var(--chen-accent); }
.series-feature { border:1px solid var(--chen-line); border-radius:12px; padding:30px; background:var(--chen-paper); }
.series-feature-top { display:flex; justify-content:space-between; gap:20px; }
.series-count { color:var(--chen-muted); font-size:11px; }
.series-feature-body { display:flex; align-items:center; justify-content:space-between; gap:20px; margin:26px 0 30px; }
.series-feature h2 { font:400 36px/1.18 var(--chen-serif); letter-spacing:-1px; margin:0; }
.series-feature p { color:var(--chen-muted); font-size:13px; line-height:1.8; margin:18px 0; }
.series-formula { color:var(--chen-accent); font:italic 25px/1.4 var(--chen-serif); padding:20px; white-space:nowrap; }
.series-feature .button-primary { font-size:12px; padding:11px 16px; }
.series-chapters a,.chapter-link { display:grid; grid-template-columns:26px 1fr 15px; gap:14px; padding:18px 0; border-top:1px solid var(--chen-line); text-decoration:none!important; color:var(--chen-ink); font-size:13px; line-height:1.6; }
.chapter-number { color:var(--chen-muted); font-size:11px; font-variant-numeric:tabular-nums; }
.series-chapters a:hover,.chapter-link:hover { color:var(--chen-accent); }

/* Project catalog and compact, factual project details. */
.md-text .project-section-title { font:400 28px/1.3 var(--chen-serif); margin:32px 0 18px; }
.project-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:18px; margin:0 0 34px; }
.project-card { border:1px solid var(--chen-line); border-radius:10px; background:var(--chen-paper); display:flex; flex-direction:column; padding:24px; min-width:0; }
.project-card .overline { font-size:9px; }
.md-text .project-card h3 { font-size:20px; font-weight:500; letter-spacing:-.5px; margin:18px 0 12px; line-height:1.35; background:none!important; }
.md-text .project-card h3 a { color:var(--chen-ink); background:none!important; text-decoration:none!important; }
.md-text .project-card h3 a:hover { color:var(--chen-accent); }
.md-text .project-card p { color:var(--chen-muted); font-size:13px; line-height:1.8; margin:0 0 20px; }
.project-card .project-venue { color:var(--chen-accent); font-size:11px; margin-bottom:14px; }
.project-card-links { display:flex; align-items:center; flex-wrap:wrap; gap:20px; border-top:1px solid var(--chen-line); padding-top:15px; margin-top:auto; }
.project-card-links a { font-size:11px; color:var(--chen-accent); text-decoration:none!important; }
.project-resource-links { display:flex; gap:12px; margin-top:25px; }
.project-facts { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); border:1px solid var(--chen-line); border-radius:9px; margin:0 0 32px; background:var(--chen-paper); }
.project-facts>div { padding:18px; border-right:1px solid var(--chen-line); }
.project-facts>div:last-child { border:0; }
.project-facts dt { color:var(--chen-muted); font-size:9px; letter-spacing:.1em; text-transform:uppercase; }
.project-facts dd { margin:8px 0 0; font-size:12px; color:var(--chen-ink); line-height:1.6; }
.related-projects { margin-top:36px; border-top:1px solid var(--chen-line); padding-top:24px; }
.related-projects a { display:flex; justify-content:space-between; gap:20px; font-size:14px; text-decoration:none!important; padding:10px 0; }
.repo-card { border:1px solid var(--chen-line); border-radius:9px; background:var(--chen-soft); padding:23px; margin:28px 0; }
.repo-card>a { display:block; font-size:16px; font-weight:550; margin:8px 0; text-decoration:none!important; }
.repo-card p { font-size:13px; color:var(--chen-muted); margin:0; }
.repo-card .eyebrow { font-size:10px; letter-spacing:.12em; color:var(--chen-muted); }

/* About, search, settings and shared footer. */
.about-lead { font:400 24px/1.6 var(--chen-serif); color:var(--chen-ink); margin-bottom:30px; }
.about-section { border-top:1px solid var(--chen-line); padding:26px 0 0; margin-top:30px; }
.md-text .about-section h2 { font:400 27px/1.3 var(--chen-serif); margin:0 0 18px; }
.interest-list { display:flex; gap:8px; flex-wrap:wrap; margin-top:22px; }
.interest-list span { border:1px solid var(--chen-line); border-radius:5px; color:var(--chen-muted); font-size:11px; padding:5px 9px; }
.md-text .tag-plugin.timeline { margin:24px 0 0; }
.tag-plugin.timeline .timenode { padding-bottom:20px; }
.tag-plugin.timeline .timenode .header { font-size:11px; color:var(--chen-accent); }
.tag-plugin.timeline .timenode .body { border:0!important; box-shadow:none!important; background:transparent!important; padding:6px 0!important; }
.tag-plugin.timeline .timenode .body p { font-size:13px; margin:0 0 4px; }
.tag-plugin.timeline .timenode:before { background:var(--chen-line)!important; }
.contact-panel { display:flex; justify-content:space-between; align-items:center; gap:20px; border:1px solid var(--chen-line); background:var(--chen-tint); border-radius:9px; padding:24px; margin-top:32px; }
.contact-panel p { margin:0; font-size:13px; }
.contact-panel a { font-size:13px; white-space:nowrap; text-decoration:none; }
.search-dialog { background:var(--chen-paper)!important; border:1px solid var(--chen-line)!important; border-radius:12px!important; color:var(--chen-ink); }
.search-dialog::backdrop { background:#14291e55; backdrop-filter:blur(5px); }
.search-result a { border-color:var(--chen-line)!important; }
.search-result mark,.highlight-keyword { color:var(--chen-ink); background:var(--chen-tint); }
.chen-footer { margin:60px 0 0; padding:28px 0 8px; border-top:1px solid var(--chen-line); display:grid; grid-template-columns:1fr auto; gap:28px; color:var(--chen-muted); }
.footer-name { font:400 22px/1.2 var(--chen-serif); letter-spacing:-.5px; color:var(--chen-ink); text-decoration:none; }
.footer-name span { color:var(--chen-accent); }
.chen-footer p { font-size:11px; line-height:1.7; margin:8px 0 0; }
.chen-footer nav { display:flex; gap:20px; align-self:center; }
.chen-footer nav a { font-size:11px; color:var(--chen-muted); text-decoration:none; }
.chen-footer a:hover { color:var(--chen-accent); }
.footer-colophon { grid-column:1/-1; display:flex; justify-content:space-between; gap:12px; font-size:10px; padding-top:4px; }
.footer-colophon a { color:inherit; text-decoration:none; }
.error-header { padding:50px 0; border:0; }
.error-code { font:100px/1 var(--chen-serif); color:var(--chen-line); margin:15px 0 30px; }
.skip-link { position:fixed; top:-100px; left:20px; z-index:1000; background:var(--chen-ink); color:var(--chen-paper); padding:12px 20px; border-radius:6px; }
.skip-link:focus { top:12px; }
.article-tags,.share,.post-footer,.read-next { border-color:var(--chen-line); }
.settings-section { border-color:var(--chen-line); }

/* Keep Stellar's mobile drawer mechanics; replace only presentation. */
@media(min-width:1181px) {
  .site-workspace { max-width:1380px; padding:0 34px; grid-template-columns:220px minmax(0,800px) 190px; column-gap:42px; justify-content:center; }
  .site-shell:not([data-regions~='rightbar']) .site-workspace { max-width:1220px; grid-template-columns:220px minmax(0,800px); column-gap:66px; }
  .site-region--leftbar { width:220px; justify-self:stretch; }
  .site-region--rightbar { width:190px; }
  .site-main { width:100%; max-width:800px; margin:0; }
}
@media(min-width:769px) and (max-width:1180px) {
  .site-main { padding:34px 22px; }
  .home-hero h1 { font-size:48px; }
  .series-callout { flex-wrap:wrap; }
  .series-formula { display:none; }
}
@media(max-width:768px) {
  .site-main { width:100%!important; max-width:none; margin:0!important; padding:28px 24px 20px; }
  .site-main > .brand-header { display:none!important; }
  .site-region--leftbar .site-region__surface { background:var(--chen-paper)!important; border:1px solid var(--chen-line); border-radius:12px; }
  .site-region--leftbar .brand-header { padding-top:20px; }
  .section-header { padding-top:14px; padding-bottom:26px; margin-bottom:28px; }
  .section-header h1 { font-size:36px; letter-spacing:-1.1px; }
  .section-header p { font-size:15px; }
  .home-hero { padding-top:15px; }
  .hero-kicker { font-size:8px; letter-spacing:.08em; }
  .home-hero h1 { font-size:45px; letter-spacing:-1.8px; margin-top:24px; }
  .hero-role { font-size:14px; }
  .hero-description { font-size:16px; }
  .hero-actions { gap:20px; margin:24px 0; }
  .hero-footnote { font-size:10px; gap:10px; }
  .hero-footnote a { display:none; }
  .home-section { margin-top:32px; }
  .section-heading h2 { font-size:27px; }
  .overline { font-size:9px; }
  .section-link { font-size:11px; }
  .writing-entry { grid-template-columns:47px 1fr 12px; gap:13px; padding:23px 0; }
  .entry-date,.entry-date time>span:first-child { font-size:10px; }
  .entry-copy h3 { font-size:18px; }
  .entry-copy p { font-size:12px; }
  .entry-category { font-size:8px; letter-spacing:.08em; }
  .work-row { grid-template-columns:22px 1fr 14px; gap:12px; }
  .work-kind { display:none; }
  .work-row h3 { font-size:16px; }
  .work-row p { font-size:11px; }
  .series-callout { flex-wrap:wrap; padding:20px; gap:16px; }
  .series-callout .button-text { margin-left:42px; padding:0; }
  .series-callout h2 { font-size:16px; }
  .project-grid { grid-template-columns:1fr; }
  .project-card { padding:22px; }
  .project-facts { grid-template-columns:1fr; }
  .project-facts>div { border-right:0; border-bottom:1px solid var(--chen-line); display:flex; gap:24px; align-items:baseline; padding:13px 17px; }
  .project-facts dt { min-width:65px; }
  .project-facts dd { margin:0; }
  .topic-grid { grid-template-columns:1fr; }
  .topic-tile { padding:24px; }
  .topic-tile h2 { margin-top:14px; }
  .series-feature { padding:23px; }
  .series-feature h2 { font-size:32px; }
  .series-formula { display:none; }
  .browse-nav { gap:24px; }
  .archive-row { grid-template-columns:50px 1fr 12px; gap:12px; font-size:14px; }
  .archive-row time { font-size:10px; }
  .md-text { --fs-content:16px; font-size:16px; }
  .md-text h2 { font-size:26px; margin-top:1.9em; }
  .md-text h3 { font-size:18px; }
  .md-text .highlight pre { font-size:12px; }
  .md-text .highlight .code pre { padding:16px 14px; }
  .katex-display { font-size:.9em; padding:18px 10px; }
  .about-lead { font-size:22px; }
  .contact-panel { flex-direction:column; align-items:flex-start; }
  .chen-footer { grid-template-columns:1fr; gap:20px; margin-top:44px; }
  .chen-footer nav { gap:24px; }
  .footer-colophon { flex-wrap:wrap; font-size:9px; }
  .site-shell__controls .ui-collection__item { background:var(--chen-paper); border:1px solid var(--chen-line); }
}
@media(prefers-reduced-motion:reduce) {
  html { scroll-behavior:auto; }
  *,*:before,*:after { animation:none!important; transition:none!important; }
}

/* Refinements after the first visual review. */
.site-region--leftbar .widget-instance--menu a.is-active{background:var(--chen-tint)!important;color:var(--chen-accent)!important;border-color:transparent!important;}
.site-region--leftbar .widget-instance--menu a{border:1px solid transparent!important;}
.site-region--leftbar .widget-instance--menu a .ui-collection__title{text-decoration:none!important;}
.site-region--leftbar .widget-instance--menu a .ui-collection__indicator{display:none;}
.site-region--leftbar .widget-instance--menu a.is-active .ui-collection__title{font-weight:600;}
.site-region--leftbar .widget-instance--menu .ui-collection{padding:0!important;}
.site-region--leftbar .site-region__body{margin-top:0!important;}
.md-text .md-link-icon{display:none!important;}
.project-grid .project-card h3 a{padding:0!important;}
.widget-wrapper.toc .widget-body{padding:0!important;}
.widget-wrapper.toc .widget-header{opacity:1;color:var(--chen-muted);}
.chapter-pagination{display:grid;grid-template-columns:1fr 1fr;gap:20px;border-top:1px solid var(--chen-line);margin-top:36px;padding-top:25px;}
.chapter-pagination a{display:block;color:var(--chen-ink);text-decoration:none;line-height:1.6;}
.chapter-pagination a:last-child{text-align:right;}
.chapter-pagination .overline{font-size:9px;}
.chapter-pagination strong{display:block;font-size:14px;font-weight:500;margin-top:8px;}
.chapter-pagination a:hover strong{color:var(--chen-accent);}
.highlight .keyword,.highlight .selector-tag,.highlight .literal{color:#c5b8e5;}
.highlight .string,.highlight .regexp,.highlight .attr{color:#bbd4a9;}
.highlight .number,.highlight .symbol{color:#e8b584;}
.highlight .title,.highlight .function{color:#a9cfe5;}
.highlight .comment,.highlight .quote{color:#a1b8a9;font-style:italic;}
.highlight .built_in,.highlight .type{color:#e3d5a4;}
.mobile-masthead{display:none;}
@media(min-width:1181px){.site-shell[data-regions~='rightbar'] .site-workspace{grid-template-columns:220px minmax(0,740px) 220px;column-gap:40px;}.site-region--rightbar{width:220px;}.site-shell[data-regions~='rightbar'] .site-main{max-width:740px;}}
@media(max-width:768px){.mobile-masthead{display:flex;align-items:center;justify-content:space-between;margin:0 24px;padding:20px 0 16px;border-bottom:1px solid var(--chen-line);}.mobile-name{font:20px/1.2 var(--chen-serif);color:var(--chen-ink);text-decoration:none;}.mobile-name span{color:var(--chen-accent);}.mobile-masthead>div{display:flex;gap:18px;}.mobile-masthead button{font-size:11px;background:none;color:var(--chen-muted);border:0;min-height:36px;padding:4px 0;}.mobile-masthead button span{margin-left:4px;}.site-main{padding-top:20px;}.home-hero{padding-top:0;}.site-shell__controls{display:none;}.chapter-pagination strong{font-size:12px;}.chapter-pagination{gap:16px;}}

/* Avoid the stock rail's redundant top spacers and decorative fades. */
.site-region--leftbar .brand-header--site>.brand-wrap{padding-top:0!important;}
.site-region--leftbar .brand-header{gap:12px;}
.site-region--leftbar .brand-search{margin-top:10px;}
#leftbar-region .site-region__zone--body{mask:none!important;-webkit-mask:none!important;}
#leftbar-region .widget-instance--menu{padding-top:0!important;}
.search-result .search-content,.search-result p{color:var(--chen-muted);opacity:1;}
@media(max-width:768px){.site-dock__button--leftbar{display:none!important;}.mobile-masthead{position:sticky;top:0;z-index:7;background:var(--chen-bg);padding:10px 0;}.mobile-masthead button{min-height:44px;min-width:44px;}.hero-kicker{font-size:9px;}.footer-colophon{font-size:10px;}}

/* The theme's code selectors include type selectors: keep these explicit. */
.md-text .highlight .line{color:var(--chen-code-ink);}
.md-text .highlight .keyword,.md-text .highlight .selector-tag,.md-text .highlight .literal{color:#c5b8e5;}
.md-text .highlight .string,.md-text .highlight .regexp,.md-text .highlight .attr{color:#bbd4a9;}
.md-text .highlight .number,.md-text .highlight .symbol{color:#e8b584;}
.md-text .highlight .title,.md-text .highlight .function{color:#a9cfe5;}
.md-text .highlight .comment,.md-text .highlight .quote{color:#a1b8a9;font-style:italic;}
.md-text .highlight .built_in,.md-text .highlight .type{color:#e3d5a4;}
.md-text .highlight .copy-btn{color:#c2d6c8;background:var(--chen-code);border-radius:6px;}
@media(pointer:coarse),(max-width:768px){.md-text .highlight .copy-btn{visibility:visible;width:44px;height:44px;}}

.md-text .highlight .code .copy-btn:hover{color:#f4faf5;background:#334d3e;}
.chen-copy-feedback{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);z-index:30;max-width:calc(100vw - 48px);box-sizing:border-box;padding:12px 20px;border:1px solid var(--chen-line);border-radius:8px;background:var(--chen-paper);color:var(--chen-ink);font-size:13px;box-shadow:0 5px 20px #14291e20;}
.chen-copy-feedback[hidden]{display:none;}

.chen-article-tags{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin:32px 0 16px;padding-top:22px;border-top:1px solid var(--chen-line);font-size:11px;color:var(--chen-muted);}
.chen-article-tags a{color:var(--chen-accent);border:1px solid var(--chen-line);border-radius:5px;padding:5px 9px;text-decoration:none;}
.chen-article-tags a:hover{background:var(--chen-tint);}

@media(max-width:768px){html{scroll-padding-top:96px;}}

@media(min-width:1181px){
 html[data-leftbar-state='collapsed'] .site-shell:not([data-drawer='leftbar']):not([data-regions~='rightbar']) .site-workspace{grid-template-columns:64px minmax(0,800px);max-width:1064px;}
 html[data-leftbar-state='collapsed'] .site-shell:not([data-drawer='leftbar'])[data-regions~='rightbar'] .site-workspace{grid-template-columns:64px minmax(0,740px) 220px;max-width:1220px;}
}

.settings-page__header{padding:4px 0 28px!important;margin:0 0 32px!important;border-bottom:1px solid var(--chen-line);}
.settings-page__header h1{font:400 44px/1.2 var(--chen-serif)!important;letter-spacing:-1.5px;margin:0!important;color:var(--chen-ink);}
.settings-page .settings-section{margin:32px 0 0!important;padding:0!important;}
.settings-page .settings-section h2{margin:0 0 18px!important;font-size:27px;}
.settings-page .settings-section__body{padding:0!important;}
.settings-page .settings-kv__row{font-size:14px;min-height:40px;}
@media(max-width:768px){.settings-page__header h1{font-size:36px!important;}}